gt35r on stock motor psi?

[nekoabandoned]

ok let me start off by saying that the only reason im using a gt35r instead of a t25 is because im building a motor and dont want to waste money on a second turbo. the last piece of my setup is the wastegate , now i know im buying a tial 44mm which should be fine. the only thing i need to know is whats a safe psi to run for the next 6months while im getting the other motor ready?

motor:ka24de 98k milesim also using a fmu for the first 2 months so yeah XDthanks for any ideas

[nissans13240sx]

Why not just run the ka n/a for now until the other one is built. I dont think there is any psi that would be safe with a stock ka and that size turbo.

[nekoabandoned]

i would think 6-8psi would be fine XD

[shimizu_17]

ok let me start off by saying that the only reason im using a gt35r instead of a t25 is because im building a motor and dont want to waste money on a second turbo. the last piece of my setup is the wastegate , now i know im buying a tial 44mm which should be fine. the only thing i need to know is whats a safe psi to run for the next 6months while im getting the other motor ready?

motor:ka24de 98k milesim also using a fmu for the first 2 months so yeah XDthanks for any ideas

FMU + gt35R = fail on so many levels. Just wait and rock stock until your other motor is ready.

[nekoabandoned]

or i can just pull the wastegate spring XD

[nissans13240sx]

6-8psi on a t25 is pushing your luck. 6-8 psi on gt35r is not going to last very long.

[nekoabandoned]

lol all i want to do is get all piping fabed up so i dont have to worry about it later, i know tial makes a 3psi spring and ill prob go with that or just run without a spring. i dont have many days off but i can take a vacation next week , thats why im kinda trying to just get everything ready to go and tested as long as its in the car and ready for me to just swap the engine im happy.

[wynnEZ]

Stop, there is no point running 3psi on a motor... Just wait until its ready then use it. Why risk blowing up a motor you need to dd.

[steve s14]

That's what I'm running on my car and it works great.I have to say that the most important part is good fuel management. I'm using Aem ems with 810cc injectors, speed density instead of using a maf.I've had the set up for over 2 years now on my s14. The motor is an s13 ka24de with probably about 200k on it and is completely stock running 12psi with about 300whp.There thread on the ka-t forum of nico that i put up when i was building the setup. Nevermind, your thread got moved
Modified by steve s14 at 2:18 PM 11/6/2008

[steve s14]

Here is a picture of it incase you were curious.

[crzycav86]

i thought ivan at ams got 350hp on 10 psi with a gt35r.

maybe it was 350 at 15 psi? or maybe it was 300 at 10 psi. i don't remember. ....

[nekoabandoned]

lol this isnt my only car... well in that case ill just buy the aem sooner than planed, i have some 1000cc rc's lying around i might use too...thanks for the input!anyone else using a 70t+ turbo on there stock blocks?by the way ,whats the spool time on that thing? lol

[2FourTee]

I dont think there is any psi that would be safe with a stock ka and that size turbo.

A stock KA can do over 300 whp no problem. But somehow, this particular turbo is going to blow a KA no matter how many psi are run?? Say what?

With proper fuel and timing control, there's no reason he can't run 10-12 psi safely. (But I definitely wouldn't do that with just the FMU mentioned above).

[480sx]

A t25 flows about 27 lbs per min. A gt35r flows 65.

Horrible idea to use a 35r with a FMU.

[WDRacing]

The GT35R isn't a good turbo for low boost...however.

You guys need to put down the crack pipe. This thread is riddled with bad info and BS.

Go ahead and run the GT35 with the FMU, just retard the timing. Unless someone can tell me EXACTLY why that's a bad idea? The 35 CAN put out more volume then the T25...CAN. But 8 psi is 8 psi, in fact, the 8 psi from the 35 will be quite a bit cooler then the 8 psi from the T25, cause it's not nearly spinning as fast to gen up that amount of boost.

To the OP, read more.

WD

[480sx]

8 psi from a t25 and 8 psi from a gt35 is a lot dif..

Cmon man...

Your talking a much larger volume of air with a GT35. Same pressure, different volume.

With a GT35 your gona prly want a 10:1 RRFMU. Thats gona put you at 100 psi fuel pressure in a quickness, 6 psi of boost. Your gona want to run a 2-3 degree base timing retard which sucks for a daily. You also are gona wana monitor your AFR's to make sure its not leaning out. For all of that work, you might as well just save until you can do it right.

[crzycav86]

The GT35R isn't a good turbo for low boost...however.

You guys need to put down the crack pipe. This thread is riddled with bad info and BS.

Go ahead and run the GT35 with the FMU, just retard the timing. Unless someone can tell me EXACTLY why that's a bad idea? The 35 CAN put out more volume then the T25...CAN. But 8 psi is 8 psi, in fact, the 8 psi from the 35 will be quite a bit cooler then the 8 psi from the T25, cause it's not nearly spinning as fast to gen up that amount of boost.

To the OP, read more.

WD

Are you serious? I thought we got past this myth in like in 05 or something. NICO ka-t, get with the times!

8 psi is not 8 psi. what matters in terms of fuel requirements is air density. that means pressure AND temperature. the cooler charge of the gt35 increases the air density(compared to 8 psi from a t25), meaning you need more fuel for proper afr's.

it just so happens that a rrfpr will work just fine at 8 psi.(i have a big boy spreadsheet that tells me so) Use a 6:1 RR. that will give you the best afrs. (with 100 psi in the fuel rail)

i wouldn't say this thread is riddled with bad ideas and bs. this thread has cautious members who don't want another member to do something stupid.

read more.

[WDRacing]

Perhaps I shouldn't have said 8 psi is 8 psi, that infact is wrong. But for 8 psi a FMU WILL work. I know guys that have run 12 psi with retarded timing and the 8:1 FMU. The 8:1 FMU makes it rich on boost as is, so I doubt you'd need the 10:1. But even if you did, people have been using them for years at 8-10 psi of boost.

At such a low boost, the volume difference ISN'T that huge. So it doesn't play that big of a role IMO. If we were swapping to a GT35 at 20 psi, yeah huge difference, but we're taking 8 or less psi.

I'm just saying, it can be done. Is it the best, course not, I never said it was, but it will work.

[hannibal]

Like Brian said, GT35R with enough fuel isnt a big deal. Just make sure you have enough fuel and correct timing.

[BoostFab]

why are you wasting time w/ the FMU; if you have hte $ to spend on the GT35, put down some more to get a ROMTUNE...enthalpy, nistune, etc... you will need it for the built motor anyways.

[DevilMB3017]

The extra volume at the same PSI in these two turbochargers is that the charge temps are kept lower. This means overall you need less fuel to cool down the motor. This means you may run leaner then optimal, but without pre-detonation.

KA-T focuses on AFR too much and not enough on EGT...

[WDRacing]

I find EGT the most useful when I'm running into that void where I become octane limited. Just because you use 150lb injectors doesn't mean you can run 35psi of boost. Even if your AFR's are 11:1...

Anyway, I guess this thread is a bit...odd. Don't skimp on fuel and ignition control if you don't have to.