wojtrek

I would like to see them on a european car too.. My car is EDM, so I was considering the USDM/GT28 combo from S4S. Don't know much about the JDM mod, which probably is what interests you most. But I think I read somewhere that someone in Sweden (IIRC) has the GT28 mod, but I'm not sure. Talking about dyno numbers is pointless when it comes to comparing them with american dyno numbers. They not only measure power at the wheels, which is just wrong (you have different power in different gears, if you use different tyres, the power will be different etc.) but also will tell you, that when you go to a dyno made by one company rather than another it will show more power (Dynojet and Mustang dyno IIRC). What I have noticed is that over here in Europe, people should be happy to get the american wheel horsepower at the crank. So if the GT28 mod is netting 550 wheel power, I would expect no more than 550 at the crank... I wish I knew the numbers for my TD04 hybrids, Swampy says the americans say it's 550 at the wheels, well... Since they are a bit smaller than the GT28's are, and I don't want to use methanol and other crazy fuel and mods, I think that if I could have something just shy of 500 at the crank - that would be great.

well, the turbos are in the car, I'm completing all the vacuum hoses, etc - it's a real maze and putting it back together, as Toyota intended, is quite a challenge. before I put them on the car, I measured the exh side of the turbos - it's the same as stock, so apart from a different shape of the wheel, there's no difference. to be honest, I don't think it's a lot of work for little gain - if I had the stock twins in my car it would take me a few hours and the car would be back on the road. It's just the matter of actually seeing for yourself what these can do, as we know, the number they have in the States are usually a lot higher than european numbers. If I can touch 500 it'd be perfect. Remember that this is supposed to be a perfect daily driver if it turns out, that the SFS GT28 mod only barely makes 50HP more over here, than yeah, for the money they charge it is not worth it, but they claim 520-550 at the wheels, so 100-150 more than on stock turbos. My TD04 based hybrids are a mystery to me, so 80hp over stock (at the crank) would be great, but in reality, running a safe 450-460 all day long, in sequential mode, is still not bad! anyway, don't know if I'll fire it up before Monday though, it;s bank holiday tomorrow here... then the weekend... we'll see. I'll keep you posted.

Since I had 650cc injectors on the car, to work with my HKS VPC and am currently taking it all out and putting back stock 550cc injectors and MAF it will take some time. If I had a stock car, this would take one day, but I have a lot of work here now, and not that much time on my hands... I want this working soon very bad, so spending more time on it than I should. Speedforsale is also using MAF on their 550+ WHP car, I wonder if MAF is all it takes or do I need MAP ECU or the like to get this in the right AFRs. Any of you remember if Stu put something on their car, any piggy back?

td04s are found on many cars basically. my gt30 was DBB, don't think they make them different anyway. it wasn't twinscroll, since when I bought it it wasn't even available in T3 flange with twinscroll. if I went with smaller A/R, like 0.86 or smaller, they'd spool up faster, but smaller A/R means less power at top...

Hi, since a few people asked to start this thread - here it is. I bought these from Swampy442. I have a European LHD version of the Supra, it's a 94 TT 6sp. I have a Tanabe Medallion exhaust (the quiet one), downpipe and blitz intake. Stock sidemout, stock engine with 245000kms on the clock (that's 150.000+ miles ) the engine is perfect, doesn't use any oil between changes. Even after 50+ laps on a track day I just took my car apart, had a GT3076R (the biggest 1.06 A/R) on it, but really missed that torque at 2000rpm. And it turns out, that 500 crank is not really possible with the gt3076, it's even hard to reach 470 (one guy here in Poland has 478 crank but with 272 cams). Since my Supra is my daily driver, I wanted something that would be a bit more powerful than stock, but retain the bottom end torque that the standard supra has. Also, I like how a stock car works, with a single conversion there are always problems, idle, part-throttle, etc. it's never as perfect as stock. And with the gt30 I had 0.5bar at 3000rpm, which wasn't tragic, but poor compared to stock. I bought the GT30 because that was a lot cheaper than buying the GT28 based hybrids from speedforsale. 3k$ plus shipping and import taxes, which take it to 4k$ is steep, plus your old turbos - hence the GT30 (amuse supra was my goal). but when I saw these td04 based for sale here, the decision was quick and simple. I guess I was lucky - more people wanted these. I just hope that they will meet my expectations. I can't really say anything about them - I don't know where they come from originally. But I took them apart and compared to stock turbos - I have an EDM Supra, so the same as UKDM, not the japanese turbos. The difference is in the compressor wheel, it is the same diameter, but the inlet is bored out to 48mm AFAIR, stock is AFAIR 38mm, don't remember correctly, but the diameter on the hybrids is 10mm bigger. So the same goes for the diameter of the compressor wheel, the larger diameter is the same as stock, at 58mm, but the smaller diameter is 48. That's around 60% bigger inlet area (11.3cm2 vs 18cm2). the exhaust part looks pretty similar, the difference is only in the shape of the blades, maybe the wheel is made from a different material, but I don't know that. no difference in the size. I don't want to guesstimate how much power I can get from them, I made 415-420 at the crank on stock turbos (bearly 1.1-1.2bar) with full exhaust and an intake. so given the fact, that the compressor wheel is significantly larger and the fact that they can withstand 1.4bar thanks to the 360 bearings, I think something between 460-500 should be doable. I have a Greddy side mount (I want to keep the front active spoiler) but will probably install it after I test these at stock boost levels to have a comparison with the stock turbos - I own a dyno, so dyno time is no problem here I made 50+ dyno tests on my car already. anyway, another gain from these more 'durable' turbos is the fact that I can crank the boost of the first turbo. 0.9-1bar should net 450+ (330+ lb/ft) from as early as 2200-2400rpm. IIRC I had 390Nm (288lb/ft) from the first stock turbo. so maybe even 100Nm (75lb/ft) more is doable. As to how these compare to the GT28 hybrids - the GT28 have a 60mm compressor wheel (so only 2mm larger) and the same inlet diameter - so no significant difference here. The exhaust side is not that bigger than stock - only 1mm on the larger diameter and 3mm on the smaller diameter. I'm not sure I measured the exhaust side because they look so similar on my td04 hybrids, if it's only 3mm difference I may have not noticed that - I'll probably measure it just to be sure, I'll uninstall them from the manifold as I already screwed them on... I'm currently uninstalling all the leftovers from my single setup and in the process of collecting all the necessary gaskets etc for the stock setup. So don't expect dyno numbers tomorrow or sth, but I will keep you posted on how they behave. Here are comparison photos of the hybrids vs stock turbos. http://img692.imageshack.us/img692/1808/turbohybridvsstock.th.jpg Uploaded with ImageShack.u00s http://img594.imageshack.us/img594/8736/turbohybridvsstock2.th.jpg Uploaded with ImageShack.us http://img337.imageshack.us/img337/5294/turbohybridvsstock3.th.jpg Uploaded with ImageShack.us http://img52.imageshack.us/img52/1336/turbohybridvsstock4.th.jpg Uploaded with ImageShack.us http://img69.imageshack.us/img69/5194/turbohybrid1.th.jpg Uploaded with ImageShack.us http://img62.imageshack.us/img62/1736/turbohybrid2.th.jpg Uploaded with ImageShack.us http://img706.imageshack.us/img706/3696/turbohybridexh.th.jpg Uploaded with ImageShack.us http://img189.imageshack.us/img189/9082/turbohybridexh2.th.jpg Uploaded with ImageShack.us cheers, Wojtek

thanks a lot! I will try that tomorrow, let you know if it works. How did you set up the spring pressure? I'm sure I had it connected like you say I should, maybe due to wrong setup I couldn't control boost?

thanks matt, but since I have really tried to find the solution on the net, I also came upon this diagram. The problem is that the AEM solenoid has 3 ports, and they're just called 1,2 and 3, not as on the diagram. But nevertheless I tried that also, unplugged, capped, connected to all ports on the solenoid but to no avail. So I need a person who has that exact AEM EBC on their twin turbo supra. Working and being able to control boost... thanks!

Hi I am aware of the many threads about this EBC but none of them says how to install the solenoid. I honestly tried everything. I have tried everything that AEM install guide says, I have tried everything that I have found here or other forums on how to install other EBC (greddy or HKS etc). but for some reason no matter how I connect it, I cannot control boost. I have been through different setups of the solenoid and piping, what I got was - no boost at all, and no way to control it - 0.5bar no matter what I set on the EBC thing, - stock 0.8bar, - 1.4bar (crazy and unsafe probably). on all of the above I could go through all options on the controller but it had no effects on boost. Now I have 1.25bar when second turbo comes in and drops to 1.05 at redline, but after a few runs it drops to 0.9. but I still have no control over it... I know that many people here are saying that it is working well for them, could someone tell me how they connected it to the piping? to which ports on the solenoid (1,2,3) to which piping on the turbo, etc. I am using these pipes to connect it: http://97supraturbo.com/Tech%20Stuff%202007/Boost%20Control%20Hose%20routing.jpg I have tried both ends on the actuator (the upper and bottom one) with different ports on the solenoid. I have tried Teeing of pipes and different ports on the solenoid etc. nothing works for me. Please, anyone? regards Wojtek

Jim, I owe you one! you were right, the EGCV valve piping was the other way around! I bought the car stock, I never suspected that someone, probably by mistake, put them on the other way around... thanks. Next time you're in Poland let me know, I'll buy a pint or two of whatever you want cheers.

thanks for the reply. The VSV for IACV is working fine as is the IACV valve itself, i checked with a vacuum pump. so I don't think that is it. just maybe it is an ECU problem, soon I will connect LEDs to all 4 VSVs to see when they are operational etc and maybe then I will see which valve is open/closed when I have boost in the lower rpm from first turbo, and just maybe I can see which VSV (if that is the problem) is not coming back to it's previous state or something...

Hi, this is my first post... I have checked where I could, searched, browsed etc. and could not find the solution to my problem... so here it is I have a european (I'm from Poland) Supra TT, 6spd from 94, LHD, not a J-spec. The car is bone stock and is in sequential mode. The problem I have is that the car does not build boost at low rpm and by low I mean below 3500rpm. It would probably be easy to say what might be the problem but it is more sophisticated than that. You see, when I start the car, after night for instance, drive until I reach normal water temp etc and then hit gas harder I will have boost below 3500rpm, but only until I go pass 3500rpm, once I go to 4000rpm or more, the low boost is gone. After I start the car and don't go beyond ~3800rpm I can drive for hundreds of miles (once did 150miles) driving under 3500rpm and I have boost so the 1st turbo is working fine - car pulls strong etc. but once I go past 4000rpm (maybe it's 3800, never checked exactly what RPM) there will be no more boost under 3500rpm unless I stop the car for a few hours and then drive again - the boost is back. This does not affect the boost above 4000rpm - the second turbo is OK since I always have stock boost there. It seems that some sort of switch, after switching to position that it's suppose to be at above 4000rpm will not switch back whatever it is switching to what is should be at low rpm. And that is switching back to what it should be after the car is off for a few hours. It can't be a bad turbo itself - since I can drive for 100miles and have boost whenever I want to, that can't be it. I tested ALL VSV's, the resitance is OK, they flow air (or not) like they are supposed to. So cant be it. The pressure tank I did not check, but there is pressure in the system after I stop - I checked that, so the pressure tank holds pressure like it should. I tried TTC - working OK, starts building boost from 3500rpm and hits full boost at around 4000rpm. So, what could be the problem here? I want to upgrade my car with the GT28R hybrids, since I like the idea of sequential operation in my Supra, but since there is something wrong with the system I will not do it before I fix this... Any help much appreciated! Thanks, Wojtek