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So I have found a bone stock manual 1998 twin turbo supra that I am going to buy, as it has been the one car I have wanted for the longest. Now I am perfectly happy with how it is and how it drives since it will be a daily driver, but I have been considering doing some modifications to it. Im sure there is a thread on hear somewhere, I just havent had the time to sift through all of them yet. But basically what Im looking for is around 600 rwhp.

I have a neighbor who is pretty good with cars and I have been talking to him about it. Basically to reiterate what he said, "you can easily get 50-100 extra hp off a stock with simple modifications. Anything past that, you need to start upgrading internals. You will need tochange out the rear axel, different intack plenums, throttle body, new injectors, fuel rails, fuel pressure regulators, different clutch, flywheels, driveshaft, pistons and rods, spark plugs, etc..." his list went on, but he says with these mods you can easily handle 800 hp if not more.

Again Im just looking to reach 600 rwhp, but if I decide to go for more later on I would like to have the option to do so. I just need someone to point me in the right direction.

I,it sounds like your neighbor does not know a lot about the TT supra.
You don't need to upgrade internals or suspension for 600rwhp.
But with that power you will need single turbo conversion and complete fuel system upgrade and a few other upgrades.
AND you will have to run high octane fuel

Quote:

Originally Posted by warmkop (Post 105090)

You don't need to upgrade internals or suspension for 600rwhp.

Maybe in the future if I was to go bigger, but Im just going to be using this as a daily driver. I would just like to get around 600 rwhp.

Quote:

Originally Posted by warmkop (Post 105090)

But with that power you will need single turbo conversion and complete fuel system upgrade and a few other upgrades.

I knew I was going to need at least fuel system upgrade. I was just unsure of what else would be needed. And why a single turbo conversion and how complicated is it?

Quote:

Originally Posted by warmkop (Post 105090)

AND you will have to run high octane fuel

Does it have to be race fuel, or can it be 93 octane from a pump?

There's supras running 1000+hp on stock internals on pump gas all day

Quote:

knew I was going to need at least fuel system upgrade. I was just unsure of what else would be needed. And why a single turbo conversion and how complicated is it?

1.The stock twins wont be able to make that power you will have to upgrade the turbo.
2. It is not that complicated but it is expensive and you will need at least a piggy back system. complete fuel system upgrade and few other stuff

Quote:

Does it have to be race fuel, or can it be 93 octane from a pump?

To make that power you will have set the boost up much more and you will have to use much better fuel then 93

Quote:

Originally Posted by Sonyps307 (Post 105093)

There's supras running 1000+hp on stock internals on pump gas all day

Don't believe that. you can't boost that much with pump fuel it will destroy the engine

With a fuel system upgrade and bigger turbo he can make more then 600hp on pump gas it's been done plenty of times.

Quote:

Originally Posted by Sonyps307 (Post 105097)

With a fuel system upgrade and bigger turbo he can make more then 600hp on pump gas it's been done plenty of times.

He is talking about 600whp and i think they use methanol injection to do that

From what I've gathered by looking around and reading, I will need a single turbo conversion (Possibly a 72mm turbo, havent quite decided), an upgraded fuel system and pump, aftermarket cams, midpipe and exhaust, a new computer, a boost controller and a boost gauge. Im pretty sure I can still run everything else as stock, but correct me if Im wrong. I might do a few other odds and ends such a fuel rails and things like that.

http://www.spracingonline.com/store/...-98_Supra/3660
complete fuel system.
67mm turbo will work aswell
you need a piggy back system for ecu.
upgrade clutch kit.
and a decent meth injection if you run pump fuel.

Quote:

Originally Posted by Sonyps307 (Post 105093)

There's supras running 1000+hp on stock internals on pump gas all day

Prove it. Name even ONE Mkiv Supra Turbo that has this setup right now, and I'll personal get in touch with him/her to verify. If you won't or can't then please STFU because this is VERY BAD advice. Will you buy Mmeyer183 his new engine when he trys this and his #6 cylinder starts blowing large, dense clouds of bluish white smoke out his tailpipe?

Where are you getting this *bad* information? Please let me know so that I can set him/her straight too. Let me set you straight: There is no 3L 2jz-gte Supra on earth pushing 1000hp with only 93 (R+M)/2 octane fuel. Period.

Without water/meth injection, 1000hp on pump gas using a 3L 2jz-gte is completely impracticable. With an unlimited budget and no care for power:weight ratio, sure it's theoretically possible...for example, you could try rig up a system that cools the charge-air with liquid nitrogen. If you got the intake air cold enough (I'd guess the air would need to be maintained at about -150 degrees F during full boost), you *might* avoid detonation with 1000hp and pump gas using a 3L 2jz-GTE. Oh, don't forget that at -150 degrees F, the air (and therefore intake O2) would be MUCH more dense, so the air-fuel mix would need to be tuned appropriately to compensate.

Mmeyer183, if you're not on an unlimited budget, and/or you don't want to waste months experimenting and replacing expensive engine parts, make it easy on yourself and simply ignore Sonyps307's post.

Quote:

Originally Posted by Sonyps307 (Post 105097)

With a fuel system upgrade and bigger turbo he can make more then 600hp on pump gas it's been done plenty of times.

600hp=510rwhp (6spd), right? There's only 2 ways (without meth injection):
.
1) Destroy the engine - not immediately, but every time you boost to 510rwhp, it detonates, which takes chunks of tiny metal out of the pistons and head. What do you think happens to these tiny chunks? They ruin the cylinder bores, valve seats, and the turbo's turbine blades. Of course, it depends how often you take it up to 510rwhp, and how long you hold it there when you do, but regardless you're looking at a new/rebuilt 2jz-gte going this route (probably sooner and not later, relatively speaking).
.
2) Run a turbo so big that the lag makes the Supra practically undriveable. Huge turbos (80+mm inducer) generate very low levels of additional heat at low boost levels. They also lag like crazy... eg. with no boost whatsoever under 5500 rpm. Sure you can hit 510rwhp with a setup like this on pump gas, but who one earth would ever want to drive it? Sure, the huge turbo could be spooled with nitrous, but if you're going to that trouble, why not just put a meth injection system in, together with a more reasonably-sized turbo?

Quote:

Originally Posted by warmkop (Post 105096)

Don't believe that. you can't boost that much with pump fuel it will destroy the engine

Agreed 100%

Mmeyer183, ask Sonyps307 if he'll pay for your engine if you try that setup and it doesn't work out for the best. My guess is Sonyps307 runs for the hills...because he 1) has no idea what he's talking about, and therefore 2) won't stand behind his advice.

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