quick question

[AD2790]

how much boost can the stock turbo put out, and how much boost can the stock motor handle?

[Piddy]

400psi

[JekylandHyde]

Regardless of what the stock CT26 turbo can produce, you should not boost over 15-16 psi with it as it becomes terribly ineffiecient.

As for the engine, I have boosted as high as 24.5 psi on the stock engine but I am set up for that kind of boost level.

[MR2Jedi]

Originally Posted by ishcoleobo

400psi

Russell !

[SpeedballTrix]

Nice, Ish =P

[CompanyFlow]

Honestly though, whats the highest SAFE amount that the stock block can handle, assuming you had a different turbo, as I would also like to know.

[ST185]

Many people misunderstand how forced induction works. Boost amount is not the only thing you should think about. As long as you have enough supporting mods to your fuel system, have a way to control it, and have sufficient charge cooling capability to prevent detonating, you can get away with as much boost as you want until the weakest part of your engine goes out. If one of these supporting mods fail and you don't have a safty net, a single detonation will easily blow the engine. There is no definite answer to this question (if you want the answer in "psi"). It depends entirely on your set up and tuning. The question should be like "how much hp the stock block/internal is capable of?"

[SpeedballTrix]

"how much boost can the stock turbo put out, and how much boost can the stock motor handle?"

1) The stock turbo, as Hyde mentioned, will generate 15-16 psi efficiently. How much will it put out inefficiently? Who knows. I don't know if anyones bothered to find out because it's a waste of time for anything other than pure curiosity.

2) The stock 3S can probably "handle" up to 350hp reliably if you maintain it.
After that you'll want to have the motor shotpeened etc to make sure that all the iron atoms are holding on nice and tight to all the other iron atoms and so forth.
Hydes motor is making right around 500bhp, I think (440*1.15), so we know that the motor can do that reliably if you build it right.

[CompanyFlow]

Pardon me, for I am new, but your basically saying it can hold up as much psi until a certain horsepower? If your setup produces 300rwhp, but at 25 psi, is it still a safe setup. I would imagine not...

[JekylandHyde]

CompantFlow, Why not?

I ran & raced a 24.5 psi (making over 351 rwhp) on a 100% stock engine with 200,000 miles on it last season.

As long as you have:
*proper engine management
*proper fueling
*proper intercooling

... there really isn't any reason the OEM angine can't handle it.
If everything is done "right" the question is how much cylinder pressure can the engine handle before the head gasket let's out.

Originally Posted by SpeedballTrix

Hydes motor is making right around 500bhp, I think (440*1.15), so we know that the motor can do that reliably if you build it right.

440 @ 22 psi (1.54 hg/cm2 or 1.51 BAR).

[asifmbadar]

Hyde.. I think you meant "there really isn't any reason the OEM cant handle it."
NOT can handle it.

[ST185]

Originally Posted by JekylandHyde

If everything is done "right" the question is how much cylinder pressure can the engine handle before the head gasket let's out.

Originally Posted by asifmbadar

Hyde.. I think you meant "there really isn't any reason the OEM cant handle it."
NOT can handle it.

I think "can" is what he meant and makes more sense in that question.

[JekylandHyde]

asifmbadar is correct.
I edited my post.

ST185, you quoted my 2nd sentence, asif was refering to the first one. (see my bold edit)

[ST185]

My bad

[CompanyFlow]

I am basing my questions on assuming that everything is to OE specs (fuel management included). Im assuming that even with everything to OE specs that it is safe to run the 3sgte at 16psi on a ct26.