Pics Of My New Turbo Kit......

[GraySilvia]

ACT Street/ STrip with Xtreme pressure plate. Whats you best time and trap speed?

I apologize for the Supra-like 1/4 performance in advance:

13.5 @ 117.27 :arcadefre

No tuning, no traction. Any idea where I can get a Supra badge??

[Beau]

When do you get full boost with that setup? Is it responsive?

[GTS4-R]

3900RPM

[240SXer]

Will it hold at the higher RPMs? What exact mods are you looking at getting? I'm looking at the same turbo because I want an external wastegate. I want to run in the 12s on street tires and pump gas. I guess i'll need around 320-340rwhp to run that.

[GraySilvia]

Will it hold at the higher RPMs? What exact mods are you looking at getting? I'm looking at the same turbo because I want an external wastegate. I want to run in the 12s on street tires and pump gas. I guess i'll need around 320-340rwhp to run that.

It definitely holds in the higher RPM, it's a pretty big turbo, not a T25.

If all you want is 320-340 whp, this kit is definite overkill. Hell, Enjuku made 393 on a bone stock motor, no cams, no intake manifold, nothing. With their race car, they were getting around 470 to the wheels. Get an S15 turbo, or if you want to go big $$$, get an HKS 2530 or GT-RS and a Z32 MAF, injectors and a set of mild cams and be done.

[GTS4-R]

actually they made 496RWHP on this turbo kit w/ intake mani border fuel rail w/ 850cc, intake mani, apexi power FC, etc

[GraySilvia]

This is true, but, come to find out, that was on some mobile dyno somewhere, and according to Scott at secret services, the most they made on their dyno was 469. And that's the number I go by cause they're the ones that did all the tuning, etc.

[GTS4-R]

Actually the most they made on Secret Services dyno was 544RWHP.....but that was on a slighty larger SC-62 i believe.... (SC-60??)

[GraySilvia]

yeah, that wasn't with our turbo, so that doesn't count either!

[240SXer]

Mine T25 spikes all bad, so I feel like all internal wastegates spike. I want to go external for that reason. The the main thing I want is the max power on 91 octane. They were on racegas. How much boost could that turbo run on pump gas? And how much power would that net?

[GraySilvia]

Enjuku did the 393 to the wheels with pump gas on 21 psi. Add cams and an intake an you're well over 400rwhp on the cat pee. That was 93 octane though. So you'll probably be looking at 380ish, somewhere around there.

[240SXer]

I don't get why the T25 can only do about 12psi on 91 octane but that turbo can do 21psi?

[Nathan]

Ahhhh, what your not understanding is the concept of efficiency, the T25 is very inefficient when it's really leaned on and asked to make more boost than it was designed for. When this happens, it becomes a hairdryer, the intake charge heats up and induces detonation. Thats why a REALLY good intercooler can help a ****ty little turbo out, you really need to cool that intake charge down to see the gains you want. With that nice big t3/t04e, it's very efficient at higher boost levels, we are talking 78% efficiency at 18psi of boost or so (from memory, might not be perfect). When it's that efficient, the intake charge stays cooler and allows you to boost more without detonating

[240SXer]

Humm.. just don't get it.. Just like how with a T28bb you can only run 8psi on 370cc injectors, but on the T25 you can run 14. I don't get it! how does that make sence, it's the same boost. 14psi is 14psi, and 8psi is 8psi..

[Supafly]

Humm.. just don't get it.. Just like how with a T28bb you can only run 8psi on 370cc injectors, but on the T25 you can run 14. I don't get it! how does that make sence, it's the same boost. 14psi is 14psi, and 8psi is 8psi..

that is a matter of FLOW. you can pressurize air to the same pressures, but a smaller turbo has to work harder due to flowing less air than a larger turbo.

example turbo A flows 400cfm@15psi. turbo B flows 600cfm @15psi. turbo B has a higher flow at the same boost level therefore getting more air into the engine at a comparable boost level.

savvy?

[240SXer]

Maybe i'm just slow.. To me it seems like 400cfm would = x boost. FOr example 400cfm is 10psi, 600cfm would be 12psi... If it's flowing more or less wouldnt the boost vary too? I mean its' going through the same pipes and stuff. Is there somthing that explains this in a way I can understand it?

[RobDET]

the engine is always consuming the air the turbo is compressing. I've never seen a T25 on any 2.0 l car hold more than 10 or 12 psi at redline... Thats where the big difference is.

There is a significant gain at the same psi AND RPM however. For the same reason you pick up HP when you port the head. More cubic inches of air can get into the motor. Even if each cube is at the same PSI.

[GTS4-R]

u guys jacked my thread......lol.....=)

[Onizuka]

You get that damn thing in yet? :pface

[GTS4-R]

haven't even started yet.......=) next month next month....easy....=)....It'll be done by April....thats the goal....I have no intentions of driving the car before then (maybe the last week of march if its done...)

[GTS4-R]

PS (I'm still waiting on, ARP head studs, Greddy Cold pipe for my intake manifold, Kaaz 2 way slip-erooo =).....} i think thats about it....but I;m running out of room in my room....its a maze of boxes right now....=)...i have to leap to get to my bed...lol

[240SXer]

Sorry for jacking the tread.. can you run that turbo on stock injectors at all? Like at 8psi or somthing...

[GraySilvia]

Sorry for jacking the tread.. can you run that turbo on stock injectors at all? Like at 8psi or somthing...

That's been done. Someone on freshalloy made 262 whp or something on 8 psi and stock everything. I think all he has was the usual intake, FMIC and full exhaust. I wouldn't recommend it though.

[240SXer]

Think it would lean out? WHat's the lowest you can put that external wastegate at? 7psi? I might be able to muster the cash to buy the turbo. But I don't know about the support items.

[GTS4-R]

i wouldn't recommend it either.....if u have enough to buy the kit u should have enough to but the injectors.....=)...I'm runnin Tomei 740cc's

[GTS4-R]

The wastegate comes with a stock spring set at .6 bar or aprox. 9 psi.....you can get a different spring higher or lower bar but once again i wouldn't reccommend doin what ur thinkin of doin.....unless u wanna buy a new motor....=)

[240SXer]

hehe.. I guess.. Maybe I’ll work on getting the support items now. I always fear buying stuff with plans on installing it later because it seems like every time I do that (with computer stuff mainly) the stuff just sits around and I’ll run out of money or something. So I want to get stuff I can use immediately. I can get the injectors, but I also need MAF, fuel controller, etc. It's hard... grrr

[GTS4-R]

you'll need a fuel control reguardless with a turbo upgrade

[240SXer]

Maybe i'll get one now. Are they hard to hook up? How about getting the ECU reprogramed? are there down sides to that?

[GTS4-R]

only a couple more weeks and she'll be gettin done up....i just have to wait for my boy alex to rebuild his supra transmission then we'll be strippin the 240 down....should take about 2 weeks since the head is getting sent out for an aggressive port/polish/port matching, then we gotta do all the other head stuff, turbo kit, fuel and tune her...pics up in about a month!