boost
 

i have an 82 turbo, its all stock, i want to know how much boost it can handle without having to do any major work

Welcome to ZDriver! :038: Feel free to search as this question has been asked before... like, here: https://www.zdriver.com/forums/showt...ighlight=BOOST

ugh.... dont blow up the car cause you want to boost it. nismo claims 12 psi on stock head gasket and head studs. and also thats where the stock injectors start to lean. soo honestly... 10psi is about the highest i would go on stock car. and original 7psi your not gonna notice much of a diff. like 3 tenths of a second off the 1/4 mile lol. get a intercooler setup, bigger injectors. all metal head gasket and ARP head studs. they wont expand.

der... reading comprehension pwns you again. :D I didn't "claim" anything about 12psi being the max (I did say the injectors start to lean out @ 12-14psi, and that each motor varies):

PS... the stock L28ET didn't have head STUDS, it used bolts... quite a large difference. :D

pffft.... not really, just one has a nut, the other has a nut shaped head. same diff. queer. ;) and you said you blew ur head gasket around there i couldnt remember if it was 12 or 15 so thats why i said claim.

ah... indeed I did blow it @ 12psi... but it wasn't stock when that happened either. It had been bored & shaved head. My CR was a lot higher. I've now lowered it w/ the 2mm head gasket.

...and there is a noticable difference between the power at 7psi and 10psi. At least there was in my stock turbo engine.

The stock release valve vented at 10 on my engine so I never got up past that point. :D

there is two things your gonna have to do 82turbo... first off is upgrade your " POV " its located on the instake mamafold u can buy a HKS one i belive its blue. Or u can block it off by useing a plug from a local hard ware store. I did it that way. :-) then u will need a manual boost controller to raise the boost.. please please please dont use the stock boost gauge its not suted for over 7.5 psi. get a after market boost gauge like i did... so list of details is

1 manaul boost controller.
2 external boost gauge.
3 block off the POV aka pop off vavle..

4 u can run 10 psi no problem on a stock engine i have hell ive run 15 psi no problem but u can tell when the car leans out at 15psi. on the stock turbo but be warned now if u turn up your boost controller past 20-25 psi your turbo will leak oil from the front turbine ... that is if your turbo was the orginal turbo on you 82 car.

im running a stock engine high flow jsk fuel rail stock fuel injectors on a 1982 280zxt 2+2 5 speed. boost is set at 10 psi. and it screams ...

p.s. one last thing if u dont want turbo lag or properller to spin back wards u might want to buy a " blow off valve " and weld it to the j-pipe. closet to the throttle body .

ya, don't let your turbo's propeller spin backwords... bad news

Hear YE Hear YE....I got my stock '82 Turbo to 10psi and it could still take a few more psi i.e. 12psi. You will not get over 8psi unless you plug that emergency pop valve though. 10psi is where I would stay though until you get an intercooler. 10psi does make a huge difference over the stock setting.

10 psi kicks ass !

Uhhh... what? 20 to 25 psi?! With no intercooler on the stock turbo and fuel system? That's the fastest way to create holes in your engine I've ever heard.

The stock T3-60 turbo is outside it's optimal operating efficiency range at 12 psi (less than 75%). At 15 psi, it's approaching the edge (approaching 65% efficiency). At 20 psi (below 50% efficiency), you're probably loosing power and with the stock fuel system and no intercooler, your also superheating your intake charge and running way too lean...

Good luck.

Turbpwnd! :075: http://img3.harmony-central.com/acapella/ubb/cop.gif

170 rwhp at 25psi!!!

BAM!!

I'm aiming for 150rwhp TIME TO CRANK THE BOOST.

180 hp stock turbo at 6.9 psi. ? how can u get 175 out of 25 psi of boost ? that doesnt add up bleach ? even if u turn up the boost to 10 psi it would make what ? 10 15 more horse power ? am i wrong or am i right ? nismopick can help out on this horse power quiz ?

180 hp stock set at 6.9 psi
200 ish set at 10 psi ?
3,000,000 hp set at 25 psi LOL

a.) bleach is referring to WHP.

b.) at 25psi, assuming nothing has blown itself into tiny bits of shrapnel, the turbo would be so inefficient, you would be LOSING power. the stock turbo starts losing efficiency after about 12psi.
did you even bother to read this?
c.):075: :075: :075:


actually, i would like to see a 25psi reverse-to-first burnout. make another vid!

correct, a t28 or t3 turbo at 25psi would be a heat pump! Your intake charge would be so hot, that if it didn't immediatly detonate then you'd be dropping your potential power from 300+ down to 175 :)

also it was just a slight exaggeration. Without an intercooler your engine would be destroyed at 25psi.

With an intercooler, larger turbo, and a proper fuel system you would surely be over 300 wheel horsepower at 25psi.