Despite the intense heat, we had a pretty good week this week. Brain installed a new carburetor on the VW THING. We don’t do a lot of carburetors here at EVTV. But were driven to in this case in order to get it running well enough to license it and perhaps send it out for paint.
We had purchased the car from KOMPACTKARKORNER on eBay. Here’s their description of the car:
Hello Collectors! This is the most fun for the buck! 1974 Volkswagon Thing and if these cars were not unique enough this one has a custom flair! Brand new alloy wheels and new radials. New convertible top. new seat covers and CoCo mats. Nice solid rust free west coast body! Tow bar included – Perfect for the motorhome tow behind. Dare to stand out of the crowd!
Can be previewed and test driven at Dealership: Kompact Kar Korner – 17510 HWY 99 Lynnwood WA 98037 – Bid with confidence – We have been on the same corner since 1971. Financing available , Trades accepted, We can help with cross country or worldwide shipping – Call for quote – Or fly in and drive it home, We will pick you up at the airport.
The company had 100% positive feedback on eBay. We’ve bought a number of cars on eBay over the years. We did get taken on a MG TC at one point, but by far and away most purchases have not only been good, but some were actually better than we expected.
It took nearly six weeks to GET the car, with one bizarre excuse after another. When we did receive it, we were very pleased we didn’t fly out to drive it home. We wouldn’t have gotten far. The battery in the car was actually installed backwards. We could start it, but it wouldn’t run under any kind of load and could not be driven. The turn signals and the windshield wipers were not only inoperative, but blew fuses.
Since we are going to remove the engine anyway, this doesn’t pose a lot of inconvenience. The body, although suffering from some amateurish restoration efforts, is in pretty fair shape. We’re replacing the transmission to get better gearing for electric drive. And there’s really not much to the car. But it was not as described and quite overpriced for what we received. So I posted negative feedback on the service and took my lumps.
I was astounded to receive a notice from eBay that the negative feedback had been REMOVED. They had convened, at the request of this dealer, some sort of review board, with no knowledge on my part, and decided to remove the feedback. They hoped I understood. I don’t.
The company STILL has 100% positive feedback. And apparently have mastered some sort of feedback appeal process to make sure it stays that way. Meanwhile, we found on Google several feedbacks indicating these guys are among the WORST players online in vehicles with a long chain of apparent frauds and shady dealing.
I’m not too upset about the car. But I AM upset with eBay who have apparently VERY quietly gutted their feedback mechanism to pander to dealers, who obviously pay the lions share of the eBay commissions.
I was surprised that the eBay administrators actually exchanged several e-mails with me that did not seem to be boilerplate. I simply informed them that if their feedback mechanism had been reversed in this case, I can safely assume it has been reversed in other cases as well and so could not be relied on in a purchase decision. No problem. We just won’t buy any cars there any more.
I suppose since I’ve bought about a dozen this way, they did have the grace to seem alarmed at this, but indeed explained they HAD been doing this for some time. I did point out that my feedback as to satisfaction isn’t really subject to review, I’m either satisfied or NOT satisfied and I kind of get to define that, the problem is that eBay now doesn’t share that with other potential buyers. And so a blatant cheat is operating on the service with 100% positive feedback. I think this guts the heart of the eBay gig. And indeed, we would be very hesitant to make any large purchase on the service in the future of any kind, as we don’t know what negative feedback has been REMOVED from the ratings. There is no indication of this at all of course.
I find it enormously surprising that eBay would not risk, but basically forfeit their reputation on this matter just to keep the dealers happy and the ducats flowing in. In the long term, this is very bad policy.
The bottom line, is be VERY careful on eBay purchasing cars. The bad guys have not only gotten on the service, but have figured out precisely how to game it to do repeated fraudulent sales without anyone alerted to it. This kind of makes eBay complicit in the frauds. Again, I’m just surprised they would participate.
But brain has it running now. It smokes and is a weak engine, but it will get us around to get licked and painted and so forth. And the car does indeed suit my sense of whimsey. Should be an easy conversion.
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The sale of components has put me MUCH more in touch with our viewership and what they are doing. I’m personally cognizant of a round dozen conversions going on at the moment and I have to say I am just delighted with what I’m seeing. I don’t know if it is our work, or the validation of all the reports of OEM activity, or what, but we’re seeing a lot of GREAT conversions going on using very interesting and delightful vehicles. And largely by people much more qualified than I to do them. The DIY thing is not just alive, but thriving.
Ed Pezant of Louisianna showed up to pick up his Netgain Warp 11, 64 CA180FI cells and a SOliton1. He’s 74 years old. And he shows up in a pickup truck that runs on BOTH diesel and propane. Not EITHER diesel or propane, but BOTH at the same time. And he’s personally engineered a system of pressure sensing that does away with ALL of the electronics and meter an appropriate amount of propane into the mix during all driving regimes. This huge truck does a 14 second quarter mile.
Alan Kristman joins us this week from Cedar Rapids. This 42 year old engineer I fear will not find his Audi TT much of a challenge frankly with a Netgain Warp 9 and 50 CA180FI cells with a SOliton. It’s basically a new beetle, and I think he’ll have it done before he hardly has it started. But it should be a very cool car. The rear seats are totally useless and fold down into an obvious battery box. The Audi body is much sportier than the new VW Beetle it is based on and this should just be a gem.
But underlying all of this is kind of a cross validation I detect between the OEM electric car efforts and the DIY conversions. Several of our viewers report directly CAUSING Leaf and Volt sales using their converted vehicles as demonstrators. And we’re seeing a large number of new conversions being tackled by first timers who have been thinning on it for years in many cases. This is the classic situation in the “formative stage of a new industry” as outlined in any Business 101 level course – anything anybody does is a good thing in getting the industry off the ground. But I had clearly underestimated the commingling of body fluids between the conversion crowd and the new electric car buyers.
And the components and things are just getting better all the time. Vendors such as Netgain, HPEVS, and EVnetics are just getting us better components. As should be obvious by now, I’m enormously excited by the new CA series cells. In gleaning the wheat from the chaff for our online store we’re finding better bits and piece parts. And so it is getting easier to gain a good result in the conversion process.
In this episode, Damien Maguire of Ireland places life and limb in jeopardy with some serious home brew testing of a CA180FI. The results are remarkable. We will try to validate them but I want’ to do it in somewhat more controlled fashion using the much smaller 40Ah cells which should be here next week. It will be very interesting to put three of those in a string and putting it at a solid 10C for 30 seconds and recording the voltage. I also intend to do the experiment at 5.55C to match what we did with the SE180’s in Speedster Redux at 1000 amps. We should then have some ironclad data on how much more powerful these cells really are under load. But Damien’s work was impressive enough – he’s looking to the CA series for his next build i”m told.
Tesla released their earnings after the close of business on July 25 and followed up with a conference call for about an hour. I found two things quite informative of this.
First is delays in production. Despite delivering 10 cars and claiming victory on shipping ahead of the announced date, they are actually in arrears of schedule in the reality of the factory floor. And so they have released the information that not only are they not going to report monthly vehicle sales any time soon, but their deliveries will be heavily skewed to the FOURTH QUARTER with a scant 500 cars planned for the third quarter – July/August/September. This kind of explains why our heretofore enthusiastic contact at Tesla whom we were talking about delivering my car at EVCCON, an obviously promotional opportunity for Tesla, suddenly can’t return a phone call. I find that a little unprofessional and would much prefer they just honestly tell us they can’t support the event.
The Elon Musk explanation for the delays is actually quite believable and does not appear to be the usual corporate problem with truth and honesty. They’re having supplier problems with just a few of the bit parts on the car. They’re showing up and not up to spec, or not showing up at all. He claims that 90% of the parts on the car are unique to Tesla. I hadn’t thought about this, but it makes sense. Other than some knobs and turn signals and upholstery items, what parts WOULD it share with a GM or a Ford. AC/Delco just doesn’t do these guys much good.
Example put forth were the door handles. I love this kind of detail. The door handles are very aero being essentially flush with the body. But when you approach, they pop out so you can open the door. I kind of have a problem with this as it is an obvious failure item that would be very frustrating to deal with and hard to have repaired or replaced. But essentially the chrome on the handles they were receiving was obviously pitted and he didn’t want to deliver a $90K sedan with something this obvious reflecting the sunlight onto the buyers eye. Makes sense actually. So they have to find another company to do the plating. Chrome plating actually is under fire by the EPA and it is just a very small group of platers that will even fool with it anymore with some many onerous restrictions on their handling of the chemicals involved.
But Elon’s attention to detail is impressive and laudable. Can he then stamp out 4500 cars in the last three months of the year? Remains to be seen. But I don’t think it’s really a show stopper. The explanation rings pretty true.
The second thing was his allusion to the Supercharge. The questioners were clearly familiar with the concept of fast charging and battery swapping and 90kw home charging units. But Elon brushed all that aside and very specifically noted that it was NOT what they were thinking and that it would in fact change the way people thought about electric cars. He couldn’t talk about it until September but was REALLY excited by it.
All that tells me that our guess on the Solar CIty charging stops using photovoltaics and batteries, spotted at about 100 points across the West Coast, was actually quite on target. The reason he can’t talk about it is it is illegal to do so. I’m sure they are in the quiet period mandated by the SEC prior to an Initial Public Offering and that an IPO of Solar City is in the offing. Since he thinks he CAN talk about it in September, I would look for it in August or September.
The “changing the way people think” thing I believe is a reference to two things. Once, is if you are within 50 miles of a fast charge station at all times in a car with 300 mile range, you just have to give up the range anxiety excuse. It no longer makes sense. But more importantly, the oil fortress paid critics kind of have to give up the long tailpipe idiocy in the conversation. If you charge at a Solar City station powered by photovoltaics, there is no long tail pipe. What about your home charging? Solar City already has a program for that. The cross pollination or “synergies” between the two then become obvious. Tesla becomes a driver for Solar City rooftop installations and Solar City becomes an enabler for Tesla cars, and the long tailpipe argument trails off into the nonsense it truly always was. EV’s have always been green. Now they are incontrovertibly green. You just can’t make the argument.
And those synergies also become obvious in a SOlar City IPO. There are 160,000 gas stations in the country and they are IMMENSELY profitable. Shortcut to millionaire status is pretty much all about building gas station chains. Gasoline itself is actually not only not that profitable, but in many cases not profitable AT ALL. But the markup on 128 oz Pepsi’s is astounding. You can sell them for 90 cents and keep about 80 cents of it. HoHo’s, DingDongs, and Cheetohs are also quite profitable. Ice. Beer. Cigarettes. IN California, Latte. Frappia. Veggie burgers. You get the picture. With even a fast charge taking 30 minutes, it can be a very profitable 30 minutes and that will not be lost on SOlar City investors.
And all that could be upscaled in California. Wine instead of beer. Medical Marijuana in place of cigarettes. Latte in place of coffee. Fresh fruit in place of HoHo’s. NO. HoHo’s included even in California. It could even be expanded after the fashion of Cracker Barrel with a full restaurant, a knick knack store offering gadgetry instead of “Kuntry” goods. An Apple iPhone store?
And so a place to stop and play and eat and drink and charge – from the sun. And batteries. Lots of batteries.
We finally got our HP Tuners program up and running and talking to the ECU in the Elescalade. We kind of knew this was going to be required back last November when we purchased it. We didn’t know the authentication and protection would be as thoroughly dicked up as it is. But the guys at HP Tuners product support did finally get us up and running with the software, and we can now read and write the EEPROM in the ECU and transmission control unit (TCU). These are referred to as the Vehicle Control Module (VCM) and Transmission Control Module (TCM) in the software, which also works with Fords and some other cars with differing nomenclature.
The software comes with a USB cable that connects to the Onboard Diagnostics Level II (OBDII) connector beneath the steering while.
The existence of all of this has nothing to do with electric cars. The OBDII is for diagnostics and repair of course. HPTuners exists to “tune” the fuel/air mix, transmission shifts, etc. for the LS engines and this 6L80E transmission for performance. There is a cottage industry of people dropping these engines, conventional in Corvettes and Cadillacs, into Camaro’s and Firebirds. ANd they can get another 20 horsepower out of those vehicles by “tuning” the ignition, spark advance, fuel flow, air flow, etc. that is set by the factory software in the ECU. They can also get firmer faster shifts and torque converter lockups for racing applications. And so it exists.
About 90% of all of that is useless for electric cars. But 10% is kind of key.
Heretofore, most conversions of such cars with modern transmissions and engines have to do with gutting all that and replacing it with something else. Indeed we bought a TCI transmission as a backup because you COULD tune it. ANd of course we could run the Soliton’s off the throttle pedal output. We didn’t want to. We wanted to actually run an electric car THROUGH the ECU and TCU of the transmission in the car. EVENTUALLY, this working THROUGH the ECU will allow us full control of everything. BUt it’s mostly little things. We will be able to use the gas gage with an amp hour counter. We already get a tach signal to the instruments and TEMPERATURE indication of our motor using existing gages. But it goes to a lot of little surprising things like A/C operation, backup camera operation, even the little PRNDL indicator of what gear you are in. On the Escalade, this is not a mechanical pin but a little LIGHT that is controlled by the 6L80E. Remote start. Theft deterrence. Why would we need that? For the air conditioning of course. Cruise control. The list is endless although everything on it is a small item.
This ends ultimately with a total rewrite of the EEPROM for an electric vehicle. But I don’t think we have to do all that in one swallow. We are basically trying to prove that parts of it can be done. It would properly be left to others to actually DO an EV version of the ECU. But it clearly COULD BE DONE at this point. And we’ll tackle pieces of it as we go.
In THIS episode we get the vehicle moving. ANd it moves in very satisfactory manner right now. That causes the EV grin. I’m not a real granny kind of guy. BUt I have to tell you that this week I’m grinning on the inside. It is quite a relief to get the thing rolling at all. IT always is.
Jack Rickard
Great job dodging the Gendarmes Jack!
The Elescalade seems to be shifting quite acceptably. Very impressive.
I think I had some EV grin and all I did was ride along inside the camera Brian was holding.
Keep on truckin!
Doug
Congratulations Jack and Brian for success with the Elescalade. This sure is a historic moment
Thanks for the heads up on the VW and FleaBay and to watch out. I am saddened by the news that FleaBay is doing this sort of thing but surprised I am not. Scoundrels always find a way around things. Maybe this news will help slow it down a bit. Congrats on the Escalade. Dang, it’s about time 🙂
Pete 🙂
Hi Jack and Brian,
Once again a great episode.
Congratulations on finally getting to the bottom of things with your Escalade build and hope it will be done in time for EVCCON.
Your Escalade although as you point out is about 7,500 lbs is quite nimble as you were driving it around your block.
It was quite a shame the hood and the other parts have not yet been restored as it would have been a fun video to watch you with everything all up and running at highway speeds including your AC.
I am also so much impressed with the last video clip you featured about EV West’s Electric M3.
I always wondered whatever happened to your friend Matt
Can you do a complete feature of that car in your show?
Did you by chance invite them to feature that car in EVCCON?
I think and feel it trully represents what an Electric Vehicle Conversion is capable of doing.
It would have been really awesome if they were using not only 2 Warp 11 Motors and an Evenetics Shiva controller, but it would have been a ultimate build combination if they were using CA series cells.
I bet if they are not careful with settings, the twin warp 11 motors would break there axles and chew up their transmission.
Not to mention leave an all year long EV grin on the Rally driver up at Pikes Peak.
Marl
Marl:
Michael Bream pretty much indicated they were bringing some cars to EVCCON and were struggling with the trailer/truck issue of course but wanted to come make a splash. They were at the first EVCCON last year.
Jack Rickard
Really good show again this week: I was particularly interested in the bit on the ECU settings. Not complex in principle – just a lot of it to get your head around
That’s precisely the case John. Just an overwhelming NUMBER of variables. And a bit of uncertainty over what effect each will have.
Jack Rickard
Great show this week. My work is progressing on the EVThing, but I had to replace the drivers side floor pan and still need to put two small patch panels in the passenger side. I had not counted on this extra work, but the previous owner did a good job of hiding the rot. I bought it on EBAY and have bought and sold several cars there. I agree that EBay IS NO LONGER A safe place to buy and sell cars….
For the price I paid for the car, the rotted floor pans is minor. The engine ran good and the trans shifted fine. I got my 3:44 geared transaxle last week. If I can get the pans done, I should start assemble by next week….
Good job on getting the Escalade running. I know how hard that programming can be…. The possible combination of variables is nearly endless….
Hi Jack and Brian,
Great show, especially concerning your new found ability to acquire and rewrite the variables in the ecu. I think this will be a key element in the conversion process and being able to convert a modern car. What did this device end up costing? Is it the kind of thing that is around at automotive tuning shops? Do you think someone planning a conversion could drive his car to a shop before converting it and record all this data before taking it all apart and then just take the ecu back there and have them change the key parameters?
I think it was six or seven hundred dollars. Google HP Tuners. ANd no I don’t think any of that is practical unless you have a friend that has it and is knowledgeable. It is kind of a trial and error process, change, drive, change, drive, change it back, drive.
If you start a project with a modern ECU and automatic transmission, i would figure it in the cost of the conversion.
Jack
Jack,
Along the line of purchasing the HP Tuner for programing an ECU with a automatic transmission, Can you make an educated guess if the HP Tuner would be necessary for a late model GM using a manual transmission?
Also could you also not have to “fool” the late model GM ECU with MAP and MAF analog circuits again using a manual transmission?
I know of a service that will reprogram a ECU via file through e-mail, but it does involve purchasing a doggle between the ECU and a USB2 port of your laptop. so you can send that file to this service for modifying. http://teamzr1.com/tune.html
As a side note, My late model GM vehicles cruise control does not activate below 25 m.p.h.
Regards,
—
MARK YORMARK
Hi Jack, Ditto on the ebay issue. Pretty much standard procedure in the Model T realm NOT to purchase a complete Model T on ebay. Very likely you would wind up with a put together car of left over parts advertised as all original. Thoroughly enjoyed the glowing report on the CA battery test. Mark Jolley
Wondering if the local men in Blue enjoy watching EVTV. Obvious things like the idiot lights aside. Safety nazis concerns would be the lack of aim from bouncing away leaping armadillos.
I just love that whistle it makes! Even if it has a similar tone to a police siren. Are you going to put those fans on thermostats one day?
One last thing for a fun comparison. What’s it like on the “soap box derby”?
The motors in Elescalade have NO internal fans whatsoever, a necessary evil given our length requirements. So the external fans will be on at all times the ignition key is on.
As to the soap box derby, if you followed the eCobra build we have extended that methodology to a proper roll down test. Once the vehicle is completed, we will certainly do range testing, roll down testing, etc.
Jack Rickard
Thanks for that Jack.
Like LED lights, I couldn’t help myself but have the coolers run according to need but that’s me.
That mass vs. its rolling and air resistance. I’m sure it will make (for me) enlightening viewing.
Personally, I’d take note of the “glide slopes” of deceleration at two sample speeds. Say 60mph and 15mph. The first is mainly air resistance against mass and the second leaves air out to become mainly rolling resistance against mass.
I’m wondering if anyone at the EVCONN would like (and have the time) to compare?
Jack,
No response, hah?
Mark
Any need Mark?
Jack said he will and we can compare in due time 🙂
John has offered to follow up with some stuff. It would be interesting to not only compare CdA with mass and rolling resistance for various vehicles but also help others to decide… Horses for courses!
One of the car magazines, I don’t recall which one, used to do coast down tests to derive drag coefficient and rolling resistance. You can back those numbers out of the coast down data with just a curve fit, since the wind resistance and rolling resistance are different functions of velocity. This is beyond Excel’s curve fitting abilities. You need something that will solve for the coefficients of an arbitrary equation. Either MatLab or Easy Plot will do this, and of course you could find the coefficients by manual iteration. In reality it isn’t *quite* that easy, because there’s no perfect model for rolling resistance. I used to like the old rule of thumb, which I think came from the railroads: the mass on the axle acting against wheel rotation at a moment arm equal to 1/8 the length of the tire contact patch. More recent work says that’s way too simplistic (i.e., doesn’t take into account tire hysteresis, which was probably negligible with steel wheels on steel rails). But hey, what does it all mean? Not much. If you can get watt-hours/mile by cruising at a steady speed and averaging the data afterwards, what more do you need? I would love to know how much energy was going to fight drag and rolling resistance at various speeds, but my ability to change either of those all but ended when I selected my car to convert.
Jim – we have done some coast down testing on our conversion target before ripping the engine out and estimated watt-hours per mile at different target weights and with normal/low rolling resistance tyres. Time will tell if we got close.
We curve fitted to estimate Crr and Cd just as you described. You shouldn’t need to be bothered with hysteresis, moments and contact patches. Also curve fitting in Excel at this level works well: estimate values for Crr and Cd. -> compute roll down data using these numbers -> plot on same chart as real coast down data -> tweak estimated figures until the two curves are on top of each other. Oh and you need the weight of the car. We put ours on a weighbridge but it came out close to spec.
Jim – should have read your post properly – you mention manual iteration (the approach I described) as an option. Having done it, I’d commend it.
We borrowed a local drag strip and run – off area for the testing. We have a little video of the testing (a bit of a motoring program spoof) which my son stitched together. It doesn’t tell much about method
Jack – would you like me to ship the clip to you?
Hi Jack,
On the subject of charging and discharging. The battery manufacturers tell us to charge at 30-50 amps, we discharge at 100-200 amps, peak discharges of 1000-1500 amps, the chademo charge obviously charges at a much greater amperage than the EVSE chargers in our garage. It seems that all these amperages can and do happen that are drastically greater than the recommended charge rate, what is the true non-destructive charge rate for a 100ah or 180ah cell and how is DC (Chademo) charging different or able to charge at such an elevated rate and not harm the battery?
I don’t think anyone ever said high capacity charging would not hurt the cells. It may not. The DC charging is able to use High currents only if the source can output those currents. I have done as high as 75 battery amps going into the pack with my DC charging setup here at home. The problem is that I must pull out higher currents from my stationary pack to reach those currents and to bring the voltage to the same level as my pack. My stationary pack is lower voltage than the cars pack so must go through an inductor to increase the voltage. Those high currents from the stationary pack and inductor create a bit of heat to deal with. I like to use about 40 to 50 battery amps input into my pack which is about 100 amps from my stationary pack. Its working good so far but you must have some pretty healthy 1/0 cable and connections that can handle those amps. Welding supplies provide that.
Pete 🙂
Don:
First, you damage your battery sitting there looking at it. Any time you charge or discharge, you are using some of the cycle life in it I suppose if you carry this to extremes.
You will stress the cell less discharging at 100A than you will at 1000 A and less yet at 50A. In fact, you would be safest at 1A or not at all. Ships are safer in port, but that’s not what ships are for.
The manufacturers spec for most LiFePo4 seem to list a charge current max of 3C. That would be 300 amps for a 100Ah cell or 540 Amps for a 180Ah cell. You will certainly be safe there.
I have seen nothing to imply any Chademo charging is going on beyond 400A.
3C means you can FULLY charge a battery in 20 minutes. What more do you want?
In reality, you cannot. You will get to about 80% charge and reach the max charge voltage. At that point the current will start to come down, very fast at first and gradually more slowly. The last 5% of charge will probably take a half an hour.
For this reason, you normally see ChaDemo charging talk about 80% charge. There’s not much point in hanging around as the current drops below 50Amps or so.
Jack Rickard
Congrats on the first run of the Elescalade, Jack and Brian. Before writing off the Nissan LEAF, shouldn’t you discover world-wide sales numbers?
Eagleworks Laboratories: Advanced Propulsion Physics Research
http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20110023492_2011024705.pdf
We’re not dismissing it. We’re trying to figure out why it is going DOWN in the U.S.
Jack Rickard
I thought the high Yen was partly to blame as well as preferential allocation outside the U.S.?
The Model S is even slipperier than I thought, cD of .22 according to Musk at 1:00 in this video http://money.cnn.com/2012/07/23/autos/tesla-model-s-review/index.htm
The red hot spanner segment was an eye-opener.
Are you going to try to improve the cD of your new Speedster, perhaps taking cues from the Porsche 356? I know it’s premature, but some new materials are something to consider down the road. Nanosteel http://www.nanosteelco.com/breakthrough/index.php#prettyPhoto
Oh yes, nano steel, graphene, dilithium crystals, and of course a copper foil helmet for the driver are all on the table. You know, as we can do them.
I would actually like to lay up the body in alternate layers of copper and aluminum foil with carbon on the copper and Lithium iron phosphate on the aluminum, and use the car body as the battery. We just haven’t’ figured out how to vent it at this point.
An Audi TT coupe with those components is my dream conversion. I hope you guys post updates on Alan Kristman’s build and that he documents it well for those of us who would like to copy him. The other project that I think would be really cool would be an electric Smyth Performance kit car (based on ’09-’03 Jetta). Keep up the great work, I love what you guys do!
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