Guest h1tman930927 Posted November 5, 2012 Share Posted November 5, 2012 hi there first time posting so ill keep it simple Next year i have my eyes fixed on importing a JDM supra, but my budget restricts me to buying a twin turbo no more than 9000 USD, i live in South africa. So for that price i can only get the twin turbo model in the sub 1995 year models at best with 6spd manual. i know that before 1997 the supra's did not have vvt-i, and was wondering can it be installed on the earlier 1993-1996 models? does it make much of a deference in fuel economy and performance? Note, i have to get the twin turbo as our import laws are strict and only allow the twin turbo model to be imported as a collectors vehicle.... thanx in advance!!!! Quote Link to comment Share on other sites More sharing options...
johnny g Posted November 5, 2012 Share Posted November 5, 2012 It can be done. If you go with a standalone ECU, like a Syvecs/MoTeC/Link/etc that can control a VVTi motor, then it's easier. If you're going with a stock ECU, then there's more work to get everything lined up. Forum member EMPEROR has done it before, though. I have a built VVTi head for sale too - can ship to South Africa if you're going standalone. Quote Link to comment Share on other sites More sharing options...
Guest h1tman930927 Posted November 6, 2012 Share Posted November 6, 2012 Thanx for the fast reply, really does help. Now that i know it can be done, what performance and fuel economy gains would 1 benefit from a vvti supra to one without? Quote Link to comment Share on other sites More sharing options...
johnny g Posted November 6, 2012 Share Posted November 6, 2012 You will have more low end torque and a stringed mid range. Car will be smoother and will drive nicer. Biggest advantage for me is the reduction in spool of turbos. I gain around 400-500rpm of power. Quote Link to comment Share on other sites More sharing options...
Alex Posted November 6, 2012 Share Posted November 6, 2012 The cost of fitting the vvti, ecu and loom will never be paid for through any notional gains in mpg. You're talking 1mpg difference tops. The VVTI does have a stronger midrange but again i don't think its worth the cost. You could free up more performance and economy through other means. Fine project but don't do it thinking you'll get a massive reward for it. Quote Link to comment Share on other sites More sharing options...
johnny g Posted November 6, 2012 Share Posted November 6, 2012 The cost of fitting the vvti, ecu and loom will never be paid for through any notional gains in mpg. You're talking 1mpg difference tops. The VVTI does have a stronger midrange but again i don't think its worth the cost. You could free up more performance and economy through other means. Fine project but don't do it thinking you'll get a massive reward for it. But bringing power in smoother is also better with traction. After driving stock VVTi, BPU VVTi and Big Twins on VVTi - there's no way I'd do it any other way if I ever got back in to a Supra. Quote Link to comment Share on other sites More sharing options...
RastaMc Posted November 6, 2012 Share Posted November 6, 2012 I've swap my non turbo to a VVT-i twin turbo Jspec and my experience is that it can be done very easy. Just buy a VVT-i twin also with ECU and that's all. I replaced my NA and ECU with the vvt-i version and it was plug and play. One thing is that you have to check the electrical system en connection. There may be little differences. But I don't know if it the same for a TT from earlier 1997. My car is from 1995. Succes!! Quote Link to comment Share on other sites More sharing options...
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