New Project Supra
 

I'm importing my supra in a few weeks. looking to make 600rwhp at 1bar and a 2 bar high boost. small 50hp shot just because i can.

Is it a must to change the stock internals?

already have good prices for wisco pistons and eagle rods. building the intake and exhaust myself. lag doesnt really consern me. putting on a T72 turbo. 800cc injectors.

one big thing that i need to know. do i have to change the gearbox? its a 6 speed supe. twin turbo RZ. is 600whp at low boost enough for a 10 second supe?

want to use it for 1/4 mile and 1/2 mile runs...


ps.. i heard that if you boost lets say 1 bar with a T66 and 1 bar with a T72.. that the T72's 1 bar will be stronger than the T66.. i think its true because my logic tells me that the bigger turbo compresses more air into 1 bar than a smaller turbo... is that correct?

Nope the 2jz-gte stock internals will handle literally anything a T66 will put out, assuming a sufficient amount of octane in the (race fuel) to match your boost level, and proper tuning.

In other words, do NOT waste precious upgrade $$$$ (re)'build'ing a 2jz-gte for anyting under 1000hp (yes, 1000hp!) at the crank, unless that engine has problems (eg. low compression/leakdown #s). Note that a T72 on very high boost (eg. 35+psi), together with a shot of nitrous, might exceed 1000hp at the crank.

The 6spd has proven it can handle up to 1500rwhp!

A T72 will have more power at 1 bar (because it is more efficient), but it will also have more lag.

im glad you replayed. specifically you. because I've read your post and your pretty clued up about Supra's. If there is no doubt that the internals can handle 600-750hp then i wont change the pistons ect. but i would let me sleep much more sound at night. lol. so the gearbox can handle it without a problem. damn i love Toyota for this! lol! what is 600-750hp at the wheels going to be at the crank? im thinking about replacing the clutch as wel. 100hp clutch.. the parts aren't pricey here. the rods cost me R4500. pistons are R7000 clutch R10 500 and they have to make a custom flywheel. R3500. around here for that strong internals it ain't much money.

1 bar is 14psi and 2 is 28psi. so you think 2 bar is a bit high??

i basically want a car that will haul ass when i want it to. lag isn't too big of a deal.

at 1 bar im using 95octane. 2 bar is only for race days then i use 102 octane.

do you think 600whp will be enough to get to 10 seconds. of not. what will.:help:

Honestly you can sleep completely soundly at night, and with more $$$ under your pillow too (instead of in the piston & rod manufacturers and machine shop's hands)! The 2jz-gte is a rock up to 1000hp. The 'record' is actually over 1000rwhp on a bone stock block. 850rwhp (6spd) is a walk in the park (again, assuming good tuning and enough octane to match the boost level). Even if the rebuild parts "aint much money", there are very few machine shops with the expertise to properly rebuild a 1000rwhp+ 3L engine. If your $ won't go for parts, they'll either go to a good machine shop, or they'll go for a re-rebuild when the first one doesn't work out. Honestly it's best not to fix what isn't broken - a healthy bone-stock 2jz-gte does not need any building at your rwhp level.

Yep you'll need a different clutch for 750rwhp. Through a 6spd, 750rwhp = 880hp at the crank.

2 bar is not too high, assuming sufficient fuel flow, proper tuning, and a sufficient amount of octane. 102 octane is typically not enough for 2 bar, with complete reliability/safety. Spend those rebuild $ here - on some 116 octane+ race fuel. Detonation will quickly kill even the most expensive internals, but good race fuel can completely prevent detonation.

With slicks, 600rwhp or so can get you into the high 10s.

Im also going to use water/meth injection to cool the engine a bit more. around here 116 octane is pretty rare. I'm not going to make it a one day build(matter of speaking.) im going to drive the car stock. just decats and a good waste gate to keep the boost from going over 16psi. just a few small mods. and then when i get out of school.. yeah im in my senior year. yippy. then i'll start really amping up the power and make it a super fast street car. the fastest supra in SA is only a 13 second N/A supra. so its not going to be hard to be the fastest supra. but i want to get the fastest road car. the fastest currently is a lotus elise. dont know what the 400m time is but the 800m time is 14 something. so its gonna be hard!

Note you can't (practically) run an aftermarket wastegate with the oem twin turbos...you'll need to stay with the oem wastegate.

ok. then I'll just go single a lot sooner than expected. but 'ill start with a small turbo. maybe a T5/T4 Hybrid. then after all the fun and getting the itch to go faster I'll slap on the T72.

When I do start going for a power car. i thought it would be just smart and order all the parts. and then after i have everything then i can start building it. so then the only time i cant build it is if i forgot about something or if something doesnt fit..

i dont know which of the supra's im going to buy so i dont know what the pistons ect look like and how the car was maintained. so i think that pistons need to be on the list.

Honestly, pistons are a waste of $ until you know for sure you've got an engine that needs them. A well-maintained 2jz-gte with good compression #s should not be opened up. Toyota built these engines right, with extremely precise tolerances (tolerances are several times more precise than a 350 chevy). Race fuel and wider rims need to be on your list - not pistons. Just mho fwiw ymmv...

on that T04R supra site i read that a lot of people had a piston 6 melt down on there stock supra.. how do i overcome this..:gotnos:.

Ime, that would never happen with a bone-"stock" Supra, and I'm pretty sure this has never happend to a "lot of people" (please post those T04R links you're referring to - I know many of those guys, and I can find out more details if necessary). However, if you mod an Mkiv TT up to 'BPU' level or higher, and then try to run 20+psi on pump gas (or run without a boost gauge so you have no idea how much boost you're running), your pistons can melt. The solution to overcome this is to run race fuel when you run high boost. It is NOT a solution to replace the pistons, because high boost on pump gas will destroy any pistons, no matter how expensive they are.

damn. and here i thought a aftermarket piston would hold up a bit better..

i poked around and read a shit load of topics(again.. read all of them :))

TO4R.COM

ok he says what happened. hose of the wastegate popped off.

TO4R.COM

he didnt say what happend.
IMHO. i think it would be something too do with the heat in the desert.. pre ignition.

TO4R.COM

he ran a bit lean.

NOTE: they all had a piston 6 meltdown. not any other. 3 guys. same pistons. different reasons. imho. I think that if i get the fueling right for the #6 piston then it'll be ok once i start modifying it

In other words, he ran too much boost for the octane of fuel he had in the tank. I'd bet any money that if he'd have been running pure 116 octane race fuel, his engine would have been in perfect condition afterwards. My guess is that he was probably running pump gas...
Although external heat is a factor, the engine won't pre-ignite or detonate even on the hottest day, if you're running a sufficient octane level to match the boost level.
Yep bad tuning will kill you every time. For what it's worth, I already mentioned this in post#2, above.

You're sort-of on track. The problem is not the fact that #6 isn't getting enough fuel. The problem is that #6 is getting too much air, because the oem intake plenum is not designed for high boost (eg. 750rwhp+). This is why all big turbo'd mkivs run aftermarket intake plenums (along with race fuel, and proper tuning).

lol. well thats good to know. I noticed that the supra has a sie mounted intercooler. would it be wise to make it a fmic from the start?

I was talking to the guy who is importing the supra. he said he can get a me 6 spd targa? where there factory 6 spd supras with targa tops or was it some guy with an automatic that did a conversion. because if its a conversoin there no way im buying it. i also told him a BONE stock supra. and if he can get a quicksilver supra. i would love it! i read that there where only 27 made?? any truth to this??

The oem smic (side mount intercooler) is quite efficient, and matches the oem twins at stock boost levels quite well. You can pick up about 15-20rwhp using an fmic with the oem twins, but only at bpu+++ on high boost and race fuel.

My mkiv tt just so happens to be a factory 6 spd with a targa, ... so yep, they really do exist.

33 quicksilver mkivs were imported into the US. I'd guess there were at least as many in the rest of the world outside of Japan, if not a lot more...and probably many dozens if not hundreds within Japan.

ah so there where 6 spd targa's made. awesome! because i can get one but if its a conversion I'm not going for it.

1993/6 TOYOTA SUPRA RZ Twin Turbo 6MT- Kms: 93,000

TWIN TURBO 6MT, One Owner Car, 17" Rayz Volk Racing Rims, A/M Exhaust, Ultra Turbo Timer, Adzest CD Deck with 10 Stacker in Boot. Apart from some paint fade on the bonnet the rest of the body is in excellent condition. The interior is very clean and all the electrics are in good working order. The car has had a front accident repair which after inspection is clean and straight. The repair was to the front cross member and inner panels. This RZ Twin Turbo 6MT Supra has a lovely set of Rims and the interior and exterior are about as clean as they come. The engine sounds good and overall this car is a great package.

http://i239.photobucket.com/albums/f...Attachment.jpg

Where are you importing it from? What company are you using or buying from? I am interested because my brother is looking for a honda from japan a real right hand drive so if your gets here in good time, and is a really good car I would like him to buy from the company you used. I had some one I knew buy a car over seas and it never showed up so I don't want to get a case like that.

I know a guy in south africa who does it for me.. and he uses an agent to get the cars. i will get his email address for you and post it. I will have it by monday

Thanks, Also post when it gets here. I can't wait to hear how good it is, also put some pictures up too.

i assume your talking about the supra?? lol. i still need to do a few things. one. get a separate account so i can get my money. get the permit for the car. wait a minimum of 6 weeks for the car. so it will be about 3 more hole damn long killing me slowly months. lol.

there is also a red supra i can buy. the black one is R130 000. the red one is R110 000. but the red one looks better of you ask me. will post the picks when i get all the info of the car

ashir@displaycreations.co.za

here is his email address. ask him for his agent's email.