Purplehaze Posted June 1, 2002 Share Posted June 1, 2002 wuts up all, i'm new to these forums but not new to supras. I have a 94 US Spec supra turbo BPU w/ IC. Anyway, I am prolly gonna sell my us supra and import a used Japanese Spec supra w/ less miles. I am looking for a non vvti supra because I heard that they're was less parts for them available. Anyway, this is what I was thinking as far as mods go. Greddy T78 Turbo Garage Advance Fuel System D/P Apexi Exhaust 75 Shot NOS AEM Standalone ECU I think thats all of it. I'm shooting for 700 RWHP w/o nos. What do u guys think ? is it achievable with a JDM supra ? thanx a lot guys , these forums rock Quote Link to comment Share on other sites More sharing options...
Rich J Posted June 1, 2002 Share Posted June 1, 2002 You realise the steering wheel will be on the wrong side? Quote Link to comment Share on other sites More sharing options...
Adam W Posted June 1, 2002 Share Posted June 1, 2002 Whatever makes you think that this gentleman isn't from England Rich? The main engine differences between UK/US spec and Jap spec are the turbos and the fuel system, so if you're changing both of those then it doesn't matter which car you start out with. Are those honest-to-goodness English horses, or those weedy little American ponies? Quote Link to comment Share on other sites More sharing options...
Branners Posted June 1, 2002 Share Posted June 1, 2002 You will also be facing something like a £20k bill to get it past customs in the US. You need to talk to Motortrend in the US and ask them if its possible, they import the Skylines to the US. They introduced the VVTi from 97 onwards, and I think they stopped shipping the Supra to the US in 97 so you may as well pick up a late US model as its going to be cheaper with the steering wheel on the correct side. JB Quote Link to comment Share on other sites More sharing options...
Purplehaze Posted June 1, 2002 Author Share Posted June 1, 2002 yea i know the steering is RHD, I don't mind I like that better the LHD. The thing is that the car will be 20k imported. So that I got that aside, can I put the T78 on a VVTI engine ? Does anyone on this forum have a single installed ? Quote Link to comment Share on other sites More sharing options...
Purplehaze Posted June 1, 2002 Author Share Posted June 1, 2002 also, i'm going to be putting in camshafts, probabaly 264's. Quote Link to comment Share on other sites More sharing options...
Steve W Posted June 1, 2002 Share Posted June 1, 2002 Obviously with the VVTi (Variable VALVE Timing), the Cams/Pulleys/or SOMETHING in the Valve-Train is what's actually ALTERED. So it's unlikely that you can just change the cams ? ? (don't know HOW the Supra's VVT is operated, each manufacturer does it a different way; 1 valve then 2; valve LIFT; timing of 'lobes') All TRY to produce the same result = same (or more? ) midrange but with MORE upper horsepower. Most VVTi-type engines I've tried tend to have a 'gutless' feel at low revs and HAVE to be revved to feel 'right' ie. the Toyota '190's/the Honda 'R'-types etc. BUT, with 3 litres and 2 turbos it's just possible the Supra VVTi might NOT feel gutless ? ? Steve "WILLING-TO-THRASH-SOMEONES-VVTi-IN-THE-NAME-OF-SCIENCE" W. Quote Link to comment Share on other sites More sharing options...
Purplehaze Posted June 1, 2002 Author Share Posted June 1, 2002 is there any site for vvti cams ? a lower profile when driving but a larger one while WOT ? Quote Link to comment Share on other sites More sharing options...
Rich J Posted June 1, 2002 Share Posted June 1, 2002 Originally posted by PurpleHaZe is there any site for vvti cams ? a lower profile when driving but a larger one while WOT ? I think VVTi changed cam timing rather then duration/lift like Honda's VTEC and Mitsubishi's MIVEC. So it only has one profile but adjusts the timing of the cam (not sure which one) to reduce/increase overlap, the Nissan Skyline GT-R adjustable cam works (inlet I think), I believe Nissan call it VVTL. Quote Link to comment Share on other sites More sharing options...
Rich J Posted June 1, 2002 Share Posted June 1, 2002 Deleted ramblings as next post has links to better definitions. I think the Supra is Cam-phasing only as I mentioned in the post above. Quote Link to comment Share on other sites More sharing options...
Rich J Posted June 1, 2002 Share Posted June 1, 2002 Some better info on VVT Cam Changing VTEC/MIVEC/VVL Cam-Phasing VVT-i/BMW VANOS Cam-Phasing and Changing VVTL-i Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted June 1, 2002 Share Posted June 1, 2002 Originally posted by PurpleHaZe wuts up all, i'm new to these forums but not new to supras. I have a 94 US Spec supra turbo BPU w/ IC. Anyway, I am prolly gonna sell my us supra and import a used Japanese Spec supra w/ less miles. I am looking for a non vvti supra because I heard that they're was less parts for them available. Anyway, this is what I was thinking as far as mods go. Greddy T78 Turbo Garage Advance Fuel System D/P Apexi Exhaust 75 Shot NOS AEM Standalone ECU I think thats all of it. I'm shooting for 700 RWHP w/o nos. What do u guys think ? is it achievable with a JDM supra ? thanx a lot guys , these forums rock Buy a none VVti. The variable valve timing (and it's timing that changes, not lift or duration) was pretty much an emissions thing, although low speed torque and high end breathing were both helped a bit, and as such isn't any real bonus on a heavily modded engine. getting the AEM to run the valve timing may be tricky, but as i have yet to play with the software and work out what spare outputs it has, I can't say if it's actually IMPOSSIBLE. For sure a none VVTi will be easier to work with, and have little if any disavantages. Info on none VVTi ECU wiring is also much easier to come by. All my experiences of NOS have been bad, I plain hate it, so can't help there. although a properly mapped system (read mapped on an ENGINE dyno) may be made to work safely. 700 BHP is a fair lump of power, I'd be more worried about pistons than anything else, i would say you NEED forged ones, and JUN sell Cosworth forged pistons for the Supra, which should be top of your shopping list. there cams are based on Cosworth profiles too, and IMO Cosworth still have the best profiles for anything less than pneumatic valve trains. As to the fuelling I'd just buy bits off the aftermarket, no need for a (probably) expensive kit from a Jap garage. A pump is a pump, a pipe is a pipe, and an injector and injector... :-) Quote Link to comment Share on other sites More sharing options...
Purplehaze Posted June 2, 2002 Author Share Posted June 2, 2002 hey thanx all for replying, yea i am gonna go non vvti. There is one thing though, I have seen people put down 800 RWHP on a stock internal engine. Is there a difference between us and jdm pistons and connecting rods ? this is really odd. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted June 2, 2002 Share Posted June 2, 2002 Originally posted by PurpleHaZe hey thanx all for replying, yea i am gonna go non vvti. There is one thing though, I have seen people put down 800 RWHP on a stock internal engine. Is there a difference between us and jdm pistons and connecting rods ? this is really odd. Hard to say this without sounding rude, but we seem to measure engine BHP more "honestly" over here. I am in the racing engine game as a pro, and I can't remember just how many US built engines we have seen on a proper engine dyno (and a rolling road is totally utterly useless for measuring big bhp turbo engine figures, especially the inertia types favoured in the US) that have had NOTHING LIKE the power they are supposed to have. I plainly and simply do not believe a reliable 700 BHP is attainable for everyday usage on stock internals and pump fuel. Sorry..... ;-) Quote Link to comment Share on other sites More sharing options...
Purplehaze Posted June 2, 2002 Author Share Posted June 2, 2002 I have a close friend who is pushing about 680RWHP on stock internals. Do you guys ever go to supraforums.com ??? Thats the site for the US supra and they're are people with well over 700 RWHP on stock internals. I don't know if the Jap Spec and US spec supras are the same, but I figured that they would and that the Jap spec would have as strong internals as its us counterpart.. Quote Link to comment Share on other sites More sharing options...
Purplehaze Posted June 2, 2002 Author Share Posted June 2, 2002 o by the way i'm in the US, not in england like someone said. Quote Link to comment Share on other sites More sharing options...
Alex Posted June 2, 2002 Share Posted June 2, 2002 Did they achieve these dyno results on race gas or standard pump gas? The most anyone in the UK runs is 100RON octane fuel which is our "Super Unleaded" + Copious amounts of Toluene. I think our SUL is equivalent to your 93MON Octane so the most we could run is about 95 MON (US-SPEC pump Fuel) Quote Link to comment Share on other sites More sharing options...
GavinL Posted June 2, 2002 Share Posted June 2, 2002 Originally posted by PurpleHaZe I have a close friend who is pushing about 680RWHP on stock internals. Do you guys ever go to supraforums.com ??? Thats the site for the US supra and they're are people with well over 700 RWHP on stock internals. Chris said "reliable" 700 BHP not just 700BHP. Quote Link to comment Share on other sites More sharing options...
Purplehaze Posted June 2, 2002 Author Share Posted June 2, 2002 Alex, the run was done with 110 octane race gas. I believe he was boosting 25PSI, on 93 octane I believe he boosts 17PSI. The car is totally reliable, when I had my supra ( I sold it, damnit ), we would run a lot and that car would never stutter, it was like a Benz. I think you people under-estimate the strength of the 2JZGTE engine. Quote Link to comment Share on other sites More sharing options...
Alex Posted June 2, 2002 Share Posted June 2, 2002 We don't underestimate it we are just wary of "blowing sh1t up" What does it dyno on normal fuel? If we had "race gas" available to us at resonable price then we'd have higher dyno quotes. It cost us about $65 to fill our cars up on "SuperUL" Quote Link to comment Share on other sites More sharing options...
Purplehaze Posted June 2, 2002 Author Share Posted June 2, 2002 He dynos about 550 RWHP on pump gas. He is going to get a propane kit soon, so when he has a race he can raise the octane by adding the propane, it should work out well for him. So, beside that, does anyon here have a T78 installed ? Quote Link to comment Share on other sites More sharing options...
Syed Shah Posted June 3, 2002 Share Posted June 3, 2002 Thats 550RW SAE HP, or in our terms 420RW DIN HP. We just meausre things differently. I think 700bhp could be achieved if it is 700 SAE HP, but it could not be acheived as 700 DIN HP (840RWHP in US, quite different). Basically, the US figures are 20%> than the UK figures. Quote Link to comment Share on other sites More sharing options...
GavinL Posted June 3, 2002 Share Posted June 3, 2002 Originally posted by PurpleHaZe I think you people under-estimate the strength of the 2JZGTE engine. I think there is a large body of people in the US that over estimate the strength of the Supra. Despite what they seem too believe you only have to read Supraforums or the MKIV.com mailing list too see a fair number of people reporting blown turbo's, broken auto boxes, leaky valves or blown crank seals. Let's not forget the number of people who are not posting about their blown engines because they are too embarrased too admit it. Quote Link to comment Share on other sites More sharing options...
Nic Posted June 3, 2002 Share Posted June 3, 2002 Gavin Thanks for reminding me mate, I blew another crank seal yesterday testing whether my overheating problem was now cured That is now the 4th crank seal I have blown in a year :mad: :mad: I am now one very disillusioned 2JZGTE owner, they are certainly a strong engine but they do have their limits. Someone posted a few weeks back about increasing the hole size on the oil pressure valve, has anyone done this and can explain what needs doing? yours completely $@$%& off with my Supra, Nic Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted June 3, 2002 Share Posted June 3, 2002 Originally posted by Nic Gavin Thanks for reminding me mate, I blew another crank seal yesterday testing whether my overheating problem was now cured That is now the 4th crank seal I have blown in a year :mad: :mad: I am now one very disillusioned 2JZGTE owner, they are certainly a strong engine but they do have their limits. Someone posted a few weeks back about increasing the hole size on the oil pressure valve, has anyone done this and can explain what needs doing? yours completely $@$%& off with my Supra, Nic I VERY much doubt it's ANYTHING to do with oil pressure. Which crank seal, front or rear? More likely excess crankcase compression due to a buggered piston and /or rings. Is there a garage over there that can do a proper hot leakdown test on the cylinders, as opposed to a simple compression test? That may be illuminating. Other cause may be that they have not replaced the seal correctly after whatever caused it to go in the first place, but they'd have to be bleedin' hopeless to cock it so many times Quote Link to comment Share on other sites More sharing options...
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