sunnyxwala

max psi on stock turbos?, wahts the max that the turbos can handle reliablely??

JoeD

15 PSI. after that, its kinda pushin the reliability point.

mightyslash

17 psi

sunnyxwala

to run that much...what else would i need to be modified..just the bare minimum...i got dp..catback..got blitz sbc (not installed)

atihun

Yes, you can push 17 psi, but not reliably and not all the time. Past 15 psi there is too much restriction in the turbos to downpipe that even though you may get a few extra hps, you will build up a great deal of heat.

I wouldn't run more than 14 psi on a stock setup. Actually I have been running 13 to 14 psi for over a year with no issues.

First thing you need is an ECU upgrade to go past 11 psi. Downpipe, etc. Look at the mods I have; most would consider that a safe setup for running 14 psi at times (not all the time). To run that kind of boost all the time you will also need an upgraded Intercooler and larger secondary injectors. Those two mods are next for me.

Make sure you read as much info as you can, because all it takes is some poor "tuning" and there goes your engine.

Good luck!

JoeD

did you read his original question, or are you just whoring trying to get your post count up??

the only time i have heard of someone running 17 PSI on stock twins was at the strip on race gas. even on race gas, 17 is really pushing it on stock turbos. the word "reliabily" is not a concern anymore, since it was thrown out the door 2 or 3 pounds ago.

mightyslash

17 psi is possible on stock twins, that will answer his question

atihun

Ok boys and girls, let's play nice now.



Ok now, Mightyslash, please re-read the initial post.

Even though "reliablely" is spelled wrong, it still means the same thing!

You will not get reliable performance at 17 psi.

kwikrx7

Seems like with injectors, ecu, fuel pump, and intercooler, you can run 15 psi with good tuning. Above that is all tuning and can be playing with fire. Should have a rising rate fuel pressure regulator after 15 psi and like JoeD said should be done on race gas (16 psi and over) - and it's stupid to go over 15 - too much heat and pressure on stockers. 12-13 is safe on stock injectors and is plenty fast.

atihun

Even when using a RRFPR, you will be pushing your injectors way past their efficiency. You will flow more fuel with increasing boost, but you will also be increasing the fuel system pressure, possibly beyond the stock component limits.

I am running 13 to 14 psi, and I see 92 to 94 % duty cycle on the stock injectors. It is not good to constatantly run above 90 % injector duty. That is why I am planning 680 primaries and 1200 secondaries, plus a few other mods.

artguy

wanna see my cooked turbo wheels and oil puddles after 6k of 14lbs of boost during daily driving???

Wanna see my side seals from my last motor that are all black from the excess heat??

listen to those who are conservative in their approach. They are the ones who have learned their lessons.

any foo that runs 17lbs on a stock setup is spending money wildly...if ya got the dough..go for it..if ya got the cash ya aint no foo...but expect to go thru your turbos at least every six months/year. Expect heat damage in your motor as well.

Im on my fourth set now...I will never go back to the stock set. period.

if you want higher boost...get a set that handles them. you are just wasting time and money otherwise.

dont run high boost unless you have your intercooler, radiator, fuel system, intake, exhaust, DP, IC done. simple as that....if you want any reliability at all.

track cars and track situations are different I suppose...but if you are doing that..you must have dough.

Flybye

This thread has some good info regarding high boost and the stock turbos...

https://www.rx7club.com/forum/showth...threadid=42177