Should I get a GT3082 or GT3582? Twinscroll or singlescroll? What a/r turbine and how much difference in topend does going from 0.6 to 0.8x t 1.04 do? What about T3 or T4 inlet flange?

Need waaaaaaaay more info before we can decide.

Need more specs on the motor/induction system.

500 ponies is a hell of a lot. Its going to take some research to find the best setup for your desires.

Before i start talking about what turbo. I need to know more about your motor and how you plan to power it.

600 crank actually, cuz 500 at the wheels

stock jdm 3sgte (2l dohc engine) and as for other specifics .... anything i need will be upgraded .... fueling, oil system, sensors, gauges, ecu, intake, exhaust systems, pistons rods cams valvetrain etc

just want to know if gt3082 is a mismatch turbne / compressor for 500whp, and if theres any spoolup advantage over gt3582, and if gt35 is the way to go ....which flange / A/R to use in that case

oh and id never consider anything besides garrett turbos

for 600 crank horsepower....yes you will basically have to upgrade pretty much everything, besides the block.

Why do you want that much power in a 2800 pound car? What is this vehicles purpose?

500 horsepower creates a lot of heat, no matter how you achieve it.. So you need sufficient cooling of your intake air, water temp, your fuel, and of course, your oil.

A quick search and read through this article will probably help answer a lot of your questions.

http://www.mrcontrols.com/primers/power.htm

Take the time to read it. This has wonderful information.

thanks, i've actually read that before and a LOT of things about extracting power from 3sgte, its one of the most tuned engines around, along with all other major jap engines

the purpose - highway pulls, occasional drag racing (with special tires), and if i have a 350-450bhp map at lower boost too, track racing ofc (rmr setup and relatively light weight from factory + stripped makes mr2 very good handling track car, had done very well in jgtc and other championships - these cars were made for the track)

600bhp by todays standards is really nothing, if they can cool 1800whp lambos, i think getting a good aftermarket radiator / water pump / ic / engine fans will do for 600bhp


basically what i mean is, if some1 has experience with turbo sizing and boosting a 2litre and can recommend which one is best for my goal while keeping decent spool and good top end

some topics say gt3082 is mismatched turbo, but others say its the best, with gt35r starting to stretch the limits of acceptable lag on a 4cylinder .... ehh so confused

This post was edited by markilbaldacchino on Apr 3 2013 10:05am

Kinda apples to oranges on the lambo...

???

What gen 3s u have?

The 'top end' comes more from gearing, and the head, rather than the turbo. The boost just helps you get it there. The gearing dictates how long you are able to stay in boost, before redline.

Gt30r turbo is a great turbo, but for 500 horsepower I'd DEFINTELY recommend a GT35R, something with at least a stage 3 compressor wheel, and a pretty big hot side. (.63+)ar

The 30 will absolutely spool faster, but it will work much harder getting the power you're shooting for, when compared to the 35. And in regards to lag...For highway pulls...Forget about it. And for 0-XX mph pulls the notice should be negligible between the two in my opinion. Just a different rev range.

Despite your belief that 500 horsepower in any vehicle isn't very much, I wholeheartedly disagree. While yes, there are many examples of 1000-2000+ whp vehicles around. I just don't think you're willing to spend the 50,000 ish dollars that most of those projects (like the Lamborghini you mentioned) require to make it somewhat reliable.

While, in your case, it wouldn't be THAT crazy to afford, it's definitely going to cost.

I'm not saying it isn't possible, I'm just saying that much energy being produced out of a motor with 2.0 liters of displacement will require a revamping of practically every engine system. (cooling, induction, oiling, and don't forget engine management)

There are a ton of variables here.



This post was edited by OldAndyAndTheSea on Apr 3 2013 11:17am

its 4.2x final drive, and its got a gg tranny, which is one of the most powerful factory Jap trannies ever made btw - well known for supporting 800bhp ... crazy

the head ... yeah i'll prolly get a 2.4l stroker with 5s block but new 4340 crank, and then 272 cams, valevtrain, studs, bearings, pistons, rods and the whole works.

yeah ill suppose i gta go 3582 ... and i mentioned 3082, which is not the normal gt30r (gt3076 or 3071r)

my last question is, t3 or t4 flange?

and how much of a difference does 0.63 to 0.82 to 1.04 AR do? In the top end ofc ... i know smaller ar spools faster, is it like a 50whp difference for each ar upgrade or something? O_O