22PSI to much?

[WarpathDSM]

I was just wondering if 22 psi was to high to run. My main concern is my head gasket. My mods are up to date in my profile but it's a big 16 ported and clipped incase your to lazy to go look. thanks

 

[Unreal]

If you have the fuel and tuning for it, then no.

I've seen 30+ psi on stock headgasket. Its all in tuning.

 

[OMN_DSM]

Most people start having problems with the headgasket after they take the head off. I think you will start running into problems with other things before your headgasket calls it quits. Good luck!

Mike

 

[Violater101]

Like they said, its all in tuning ... as long as you are watching your knock and keeping it down, then 22psi should not cause you any problems with the stock hg. I personally don't feel safe running that much boost. I typically run around 20psi. With that being said, you also might want to take into consideration is the efficiency range of the 16g. I'm not sure exactly what this is, but I would guess on pump gas that this is on the outer edges of its limit.

 

[Gooberlog]

i've read that the potential of a Big 16G on pump gas is about 18psi but on race gas it tops out around 24psi. i tink 22 on some 116 octane would probobaly feel pretty nice. I think anything above 20-21 psi they recomend ARP head studs, but in order to do that you'll be removing your head, which according to these guys is when you get head gasket problems. Maybe 20psi you might be ok. Good luck. Is 15.1 still your fastet E/T?

 

[WarpathDSM]

the 15.1 ET was with the T-25, 17" chrome rims that are in my pics which I sold, all my tools and it was my first time.I missed a gear also.all I had was an intake,full exhaust.and hard pipes

 

[Kevin90GSX]

I wouldnt go around running 20lbs on the street on 93 octane. I mean Im sure you could but I run 16lbs for everyday driving..... at the track I would say sure 22 lbs with some 110 mixed in. I believe the turbo is worthless after 24lbs.

 

[Gooberlog]

Originally posted by Kevin90GSX
I wouldnt go around running 20lbs on the street on 93 octane. I mean Im sure you could but I run 16lbs for everyday driving..... at the track I would say sure 22 lbs with some 110 mixed in. I believe the turbo is worthless after 24lbs.

as i thought, said well

 

[UNFORGIVEN GSX]

I remember reading that the stock head studs are good for about 24psi before they start getting streched and blamoooooooooooo.

Rob

 

[Unreal]

PSI has nothing to do with head bolts stretching. You could run 100psi and the head bolts wouldn't stretch. Its all about cylinder pressure. The force of the exploding gas is far greater than the 20psi or whatever boost you are going to run.

Boost doesn't mean crap. You can put a t61 on the car, and make 500hp at 15psi, and blow the shit out of the factory HG, or 50psi on a t25 and not hurt it.

Its all about tuning. Like I said above, I've seen well over 30psi on stock headgasket and bolts, with no issues. If the car isn't knocking, and seeing adnormally cylinder pressure, then it will be fine.

 

[EvoSix]

Thats good to hear. I'm running 20 psi myself on a big 16G (with supporting mods) on good'ol 91 california octane.

 

[nine5raptor]

knocking will kill the headgasket (extreme cylinder pressures) quickly.

if you have you fuel up to date with your air, you can run whatever boost you want on the street.

 

[Awdboost]

Just try not to max out the engine. I believe we are good to about 420 then good bye head gasket and rods.

 

[UNFORGIVEN GSX]

Originally posted by Awdboost
Just try not to max out the engine. I believe we are good to about 420 then good bye head gasket and rods.

420?


Rob

 

[Unreal]

There have been several people dyno 420+ hp on stock motor 7 bolts. So thats 475+ at the crank. Big rods have gone mid 10s, which is over 550hp. So don't try to make 600hp on stock motor, but 550 is just fine.

People do well over 420 all the time.

 

[Gooberlog]

i wish my booss with a '99 corvette would believe that a dsm bottome end could handle 500+ hp , everytime i tell him that he laughs. ...his car is bone stock and he thinks it'll do a low 12 in the1/4 mile ahaha.
Gooberlog

 

[Defiant]

Four-hundred horsepower for much less than ten grand. What incredible effing machines.

 

[Gooberlog]

Originally posted by Defiant
Four-hundred horsepower for much less than ten grand. What incredible effing machines.

Are you concidering the car included? Because if you think 400hp for less than $10,000 in mods is nice, you should get a LS1 camaro/trans-am, my friend dynoed 315 with an intake only!And now has 348whp with bolt-ons. Damn those things are fast.
Gooberlog

 

[SPEEDY]

I currently run 21psi on my FP ported Big28 with 93 octane, with some boost spikes to around 24psi with no problems at all. I figure I'm making close to 300whp, give or take. I think 22psi on a Big 16g should be fine. I wouldn't run anymore than that without some race gas. The consensus is that 25psi is usually the limit to where the head will start to lift. That's what ARP head studs are for. With some great tuning like the above poster said you can, and people have ran more than 25psi with no problems. I wouldn't recommend running that much boost all of the time though, but it has been done.

 

[Gooberlog]

22psi + AWD + streetrace = instant win

 

[Awdboost]

Originally posted by Unreal
There have been several people dyno 420+ hp on stock motor 7 bolts. So thats 475+ at the crank. Big rods have gone mid 10s, which is over 550hp. So don't try to make 600hp on stock motor, but 550 is just fine.

People do well over 420 all the time.

I have freind with a 1995 pace vett witch still to this day thinks he can beat me. Bone stock ran 14.2 at the track. Dumbmestic people aren't very bright.

I agree that AWD+11 second time slip = unstopable car. Aslong as they are running street tires.

And If you think that F-bodys are cool cars. I've yet to meet one that is able to break into 11's second with out work to there engine and ad of spray. money on money you can make a dsm much faster if you go a cheaper on mods and do all the work your self.

 

[Gooberlog]

2002 Z28 manual 6speed
BOLT ONS Best ET. 1/4 mile 12.18 @112.5mph

 

[Awdboost]

Sorry It was 11's not 12's Brian fart.

 

[red91tsiawd]

do you mean work on the short block cuz with a head, cam, and a few bolt ons they are known to run LOW 10's

 

[UNFORGIVEN GSX]

Please don't start this Domestic vs. Import bullsh*t.

Don't start the displacement vs. turbo bullsh*t either.


Both cars have their pluses and minuses. Have you ever driven an LS1 or a V-8? I must admit, the torque is utterly intoxicating. I dislike having to wait for power with a turbo inline four and it only gets worse with the bigger turbos. However, when the turbo kicks in it is nice.


I still believe that it is not that smart to run high boost all the time without upgrading your head bolts to ARP studs. This will make sure that the head doesn't start floating as the boost pressure ADDS to the pressure of the explosions in the cylinders on the head.

As always, correct fuel management is essential to saving your engine.

Rob