is 16psi safe on a otherwise stock engine?

[shif7i7down]

I was wondering if it would be safe to run 16psi with just a better head gasket (ie. HKS) with arp studs.

As long as you're not beating on the car too much I'm thinking it should be safe enough ehh?

Edit; dont mind my wiitarded spelling in the title, ment to say safe*

[raven1231]

Originally Posted by shif7i7down

I was wondering if it would be safe to run 16psi with just a better head gasket (ie. HKS) with arp studs.

As long as you're not beating on the car too much I'm thinking it should be safe enough ehh?

Edit; dont mind my wiitarded spelling in the title, ment to say safe*

who knows. It's like rolling the dice unfortunately.

[shif7i7down]

Originally Posted by raven1231

who knows. It's like rolling the dice unfortunately.

Only asking since from my browsing it seems that most people with stock engines are running anywhere from 11~14psi without issues.

Or at Least that's what they're claiming :/

[MAPerformance]

Too many variables man. 16psi on what kind of fuel? What kind of turbo? It really comes down to the tune. 16 psi without any signs of knock? Sure. Why that psi number? Are you trying to hit a specific power goal?

[CSG Mike]

I wouldn't recommend it.

Based on the known VE of the engine and flow rate of the heads, we can extrapolate the upper end of what 17psi might equal in power, assuming ideal scenarios.

Can you do it? Yes. Would it survive a session at the track if I were driving? Nope.

[shif7i7down]

Just wondering what the stock motor can handle before shit hits the fan tis all
Of course as far as power goes, It would be the highest possible with 93oct without other engine mods besides the gasket and studs on the sbd kit.
Which if i remember correctly "correct me if I'm wrong" it can only go up to a sustainable 14psi or something like that.

[CSG Mike]

Originally Posted by shif7i7down

Just wondering what the stock motor can handle before shit hits the fan.
Of course as far as power goes, It would be the highest possible with 93oct without other engine mods besides the gasket and studs on the sbd kit.
Which if i remember correctly "correct me if I'm wrong" it can only go up to 14psi or something like that.

You're WAY out of the turbo's efficiency range at 14/17 psi. All you're doing is heating up the air. You need a larger turbo.

[swarb]

psi and cfm are two different things.
20psi from stock evo X turbo
is different than
20psi from t88 (1000hp+) turbo

safe is relative.

[shif7i7down]

Originally Posted by swarb

psi and cfm are two different things.
20psi from stock evo X turbo
is different than
20psi from t88 (1000hp+) turbo

safe is relative.

So.... you're. Saying that 16psi of boost = roughly 1.1bar over atmospheric pressure for me but it's somehow different for you, because the turbo size is different?
I don't follow..... Most likely something dealing with heat and density of oxygen molecules? But isn't that what a intercooler is for?..

Not trying to be a smart ass, just want to learn.

[CSG Mike]

Originally Posted by shif7i7down

So.... you're. Saying that 16psi of boost = roughly 1.1bar over atmospheric pressure for me but it's somehow different for you, because the turbo size is different?
I don't follow..... Most likely something dealing with heat and density of oxygen molecules? But isn't that what a intercooler is for?..

Not trying to be a smart ass, just want to learn.

Pressure =/= flow.

Think of how much water comes out of a garden hose or shower head versus a fire hydrant.

[Kiske]

Boost is measured in PSI and determined by how many cfm the turbo is pushing compared to how many cfm the engine would normally draw in.

PSI is the pressure.
CFM (cubic feet per minute) is the flow.

[Lee]

Originally Posted by shif7i7down

So.... you're. Saying that 16psi of boost = roughly 1.1bar over atmospheric pressure for me but it's somehow different for you, because the turbo size is different?
I don't follow..... Most likely something dealing with heat and density of oxygen molecules? But isn't that what a intercooler is for?..

Not trying to be a smart ass, just want to learn.

It's to do with flow. The exhaust side of the turbo is a restriction, smaller housing will create more back pressure which the engine has to work against. Bigger exhaust housing on bigger turbos allows more flow through it (less restriction) so more flow at a given psi = more power potential.

Think of blowing through a straw, into a tennis ball, then the outlet of the tennis ball has another straw (same size) You blow through the contraption with 16psi constant. Now change the straws to ones with a larger diameter, blowing 16psi through the larger straws will require much more air to do so. That's the difference.

Maybe not the best way of explaining it.

[shif7i7down]

Originally Posted by CSG Mike

Pressure =/= flow.

Think of how much water comes out of a garden hose or shower head versus a fire hydrant.

But wouldn't the bottle neck be the throttle body and not the turbo? You would think that a 20g turbo could do 16psi... ehhh. Shows what i know lol
But yeah, i see your point thou...

Guess i didn't have to worry about shit hitting the fan if i can't even boost that high.

[Dipstik-sportech]

Noob with a turbo this should be fun...... Google man it will explain everything.