stock turbo limits?

[manning]

Where are you guys pushing the turbo to boost wise (ie the LIMIT), i've been running 20-21 psi, and the turbo doesnt mind much.

I'm running just on the edge of my fuel setup, i have a few more psi in pressure to go up still.

The drag strip opens up in 2 weeks, and I'm wondering if running much over 22-24 is gonna be worth it?


(and just for referance, sorry to say, the turbo is not on a syty)

thanks guys!

 

[12secondSY]

Re: stock turbo limits?

Most I ever hear about being worth it on a stock turbo is 22psi unless you have alky then 25psi.

 

[manning]

Re: stock turbo limits?

Most I ever hear about being worth it on a stock turbo is 22psi unless you have alky then 25psi.

just cause your using the alki to cool that charge that much?

I havent been able to push the car more than 22psi, because im waiting for my new spring for the wastegate.

 

[JSM]

Re: stock turbo limits?

After 21ish psi the heat goes up greatly. If you have a way to control the heat you may see some gains going higher, if you don't control heat then not worth it.

It is all about the density of air which is both PSI and temp.

 

[Six-is-Enough]

Re: stock turbo limits?

Alky does one helluva job at cooling the manifold temps. On my truck with a stock turbo @ 22psi in the summer time with just the factory IC starting line manifold temps were 90 degrees and would climb to 150 degrees at the finish line. With Razor Alky Kit (Methanol is what I use) those same 90 degree stating line temps drop to 70 degrees at the finish line. Right at 80 degrees of difference!:tup:

 

[HotRudyRod]

Re: stock turbo limits?

Yeah 22lbs and maybe higher is very possible with AlkiControl's progressive system ( i do have a 20G tho), i ran 3 times with it and made the 1st run at 22lbs and low timing it ran like never before, 2nd run it was 18 lbs with medium timing and made some decent acceleration but not as good as the 1st, the third was at 20lbs i think (its like a year my truck's been parked since the new found power finished the trans in no time) and low timing and it ran like crap and made me think some was very wrong in the engine compartment and when i checked i realized the intercooler pump had crapped out and the intecooler heat had punched a hole in the intercooler hard line and all the coolant fluid was gone. Im pretty sure the alki's anti det & coolin effects saved my engine that time, i just waited for things to cool off and put some cold water in there and it ran strong again on the way back home.
Besides saving me a bunch of money it allows to make some real power and also works as a safety devise. I even bought one of those now discontinued Edelbrock Varajection systems for another engine im planning in e bay for 160.00 and it does have some pretty cool features, i might get a progresive controler for it but i dont remember the company's name.

 

[manning]

Re: stock turbo limits?

i have a 20g ready to go on (and a big holset after that), but i kinda wanna play with the limits on this turbo for a bit, we'll see what i can do.

Thanks guys!

 

[AXXE]

Re: stock turbo limits?

I tried all different boost levels, timing levels on the Ultimate and different octane fuels and the fastest I could go on the stock turbo was 12.60 - T3, 17lbs boost, 100 octane. At higher boost the air would start to heat up and the truck would lay down in a hurry. Some people have gone higher with good luck. Just get rid of the stocker and you will be happier.