eddierotary

iTrader: (7)

what is the max horsepower that you can get out of a stock 88 tII turbocharger? thanks

rx7_turbo2

From what I've seen 200rwhp is right about the max out of the stock turbo.

TBoost

Not true. Not true. It depends. You could theoretically modify everything else (ported motor, front mount intercooler, EMS, etc..) and boost the car to about 15psi and get about 260-300RWHP. I'm guessing..but I'm sure that turbo can put out more than 200 to the wheels.

-M

Grimlock

250hp or there abouts.

jacobcartmill

iTrader: (6)

you are on cocaine dude. I have 200 hp with the stock turbo and all i have is a downpipe, straightpipe, and intake. and i'm only running about 9psi on a cold day. i'd say the stock turbo is good for about 250 whp. i think when you are at that point, you'd be around 12 psi of boost.

rx7_turbo2

I've seen it run with streetported motors. Maybe with a massive bridgeport, but 260-300? I think your out to lunch. The stock turbo isnt all that good the exhaust side is a major restriction.

rx7_turbo2

I'd like to see the dyno chart please. Feel free to prove me wrong.

jacobcartmill

iTrader: (6)

regardless, it can support 14 psi. and if i am making 200 whp @ 10 psi, then 14psi is 250 whp easy.

rx7_turbo2

I've seen the stock turbo run at 21psi, by your theory it should have made 300+hp, just cause a turbo can support that boost pressure doesnt mean it's runs efficiently there.

twiztedjeckel

not sure about actual HP numbers but i thought i read somewhere on here that some guy ran into the 11's on his stock S4 turbo. granted he had some other goodies like a haltech, and front mount but still. not bad considering.

jacobcartmill

iTrader: (6)

i dont have any proof, but i know there are people in this 2nd gen section that are making more than 200whp on the stock turbo.

TBoost

The exhaust isn't as big a restriction as you believe. Its relatively comparable to a full T4 turbo. My car is still using the stock exhaust side and a T04E compressor side.. I'm getting 260 to the wheels with just that, exhaust, intake, and a Haltech. Everything else is stock.

And the motor wants more boost. With no boost controller the car will easily go to 15psi with a ported wastegate.

-M

rx7_turbo2

I'm running a To4b with the stock exhaust side, it is a huge restriction. Have you compared a full TO4e to the stock turbo? I have, there is a huge difference. Are there people running over 200rwhp with the stock turbo? yes, but probably not much over without a ton of work, Will the average owner do this? no.

So Jakob the hp number you quoted for yourself was just a guess then, ok.

TBoost

The T04b is only slightly larger than the stock Hitachi HT18 (which is your restriction). A full T04E has a .95A/R I believe compared to the .88A/R of the stock HT18. The A/R is indeed smaller, so it could become a restriction when wanting *massive* amounts of HP, but certainly not trying to attain 350HP-400HP to the wheels. Talking to a trained professional when I chose my turbo upgrade, the first thing he asked me is what kind of HP do you want. When I told him about 350-400RWHP, he said, your stock turbo with a T04E compressor wheel (57-trim or above) will give you that easily.

It's not as restrictive as you think. Your compressor wheel is your restriction.

-M

rx7_turbo2

My compressor housing is not as large as yours granted, but it is not the restriction, I'm obviously not going to change your mind, I suggest putting a full T04e beside the stock turbo then come back and talk with me. I'm just sick of people guessing at their hp numbers, it's what the honda crowd does.

jacobcartmill

iTrader: (6)

so i'm a ricer now?

rx7_turbo2

No, I never said that. You claimed to have 200whp, people would read that and think hey he's got 200whp off the stock turbo, but you are guessing at that number you don't know what your car is making so don't post like you do that's all. Listen I've been guilty of this as well it just makes for more misinformation that's all.

TBoost

No, I would suggest *YOU* put a full T04E on your car and give me some numbers. I guarantee you that psi for psi, you won't make more HP than my hybrid (given all mods are the same).

You are buying into the propaganda hype. You don't need a full T04E to get 400 to the wheels...that's just a fact.

And my HP numbers aren't fake:

http://userpages.umbc.edu/~mrowle1/m...yno_7.5psi.jpg

It wasn't even redlined. This is with no boost controller, stock engine, stock intercooler, Haltech computer, and turbo-back exhaust.


-M

rx7_turbo2

Yes you will make more power than me I never argued that, your comp side is bigger and more efficient. I never said your numbers are fake. I am saying that the stock exhaust side is a restriction, you would make far more power with a full To4e setup. I've had enough arguing for one day.

TBoost

You misunderstood me. I know you have a smaller turbo, but what I'm saying is that if I went out and blew $3k on a full T04E with manifold (keeping the same 57 compressor trim), and put that on my car, psi for psi, I would get roughly the same HP.

-M

rx7-rage

i'm putting about 300 to the wheels with my mods(just a guess, but my friend with the same setup plus a street port put down 318 to the wheels w/ stock ecu at like 6krpms....started getting boost creep)

i know a streetport helps a lot, but i'm boosting a little more than he was. his pull was at like 10psi i believe. but before i put all this on, i was running prolly close to 220 at the wheels with pretty restrictive exhaust (RP catback that is like 2" in diameter). so it is very possible to get at around 250 to the wheels with a nice streetport and all the other bolt on goodies with just a stock turbo

TBoost

Rx-Rage:

What custom front mount intercooler you put on the car? I'm thinking of getting the HKS one. You got any pics?

Ok, so maybe not 260-300 with the stock turbo, but certainly 250RWHP with all goodies! I agree.

-M

TBoost

Btw, I'm thinking that a T04B can't put *that* much to the wheels dude @ only 10psi! His pull must've been higher than 10psi to get 318RWHP! I'm barely getting 260RWHP with a much bigger turbo at a higher boost (mine crept to 15psi during that dyno run before he let off). Of course, the stock intercooler doesn't help my car at all...

-M

Kspurr

I should be getting my vert dyno tuned in the next two weeks, and I'll post the numbers. It runs a hitachi turbo, RP Downpipe and Midpipe, streetport, Custom Weapon R Intake, Bosal Cat Back, and a Microtech Standalone. It should be a half way decent example of what the stock turbo can do.

TBoost

Please post when its done. I'm anxious to see the slip!

Thanks,

-M