turbo ? - Page 2

**my8950** · 11-02-2009, 11:54 PM

supply the details that I suggested as well and it would help make a closer guesstimate. Engine specs help a lot, there are quite a few variables that help determine what pressure you can run.....
Best bet is to start small and move up from there....

**foxbodydave** · 11-02-2009, 11:56 PM

well right now its on 7lbs spraying meth, and it put down 480 to the wheels. he wants to turn it up to 12lbs and was wondering if he could.

**Detroit Style Dragger** · 11-03-2009, 12:05 AM

You can run it up to 100psi+ if you wanted to. What internals does the engine have? What is the actual size of the turbo? Can the valve springs keep the valves shut under that pressure?

**foxbodydave** · 11-03-2009, 12:12 AM

the motor is an all forged 355 lt1 with ported lt1 heads, hot cam kit with upgraded springs. i believe the springs are around 380lbs open and 140 closed

**superstang9085** · 11-03-2009, 12:14 AM

its just a spring change away.....

**Detroit Style Dragger** · 11-03-2009, 12:21 AM

IF its below 9:1 compression, raise the boost.

char · 11-03-2009, 12:44 AM

http://www.gnttype.org/techarea/turbo/turboflow.html

**TRBOBUICK** · 11-03-2009, 02:21 PM

Quote:

Originally Posted by Detroit Style Dragger

You can run it up to 100psi+ if you wanted to.

Not really. Boost is just a measurement of intake restriction. Psi will change from engine to engine. On my engine of 260 cubes , i can run 30 psi no problem with my gt42-76 . On rajs car he could make more than 22 psi with the exact same turbo. Cubes and head flow is what determines the boost a turbo will put out.

To answer the original question, yes his turbo will go to 12 psi without any problems.

**foxbodydave** · 11-07-2009, 04:45 PM

thanks, im kind of turbo illiterate. but im learning. have you ever messed with a blow thru carb? im curious about messing with a regular holley carb and making it a blow thru. what all is different

Quote:

Originally Posted by TRBOBUICK

Not really. Boost is just a measurement of intake restriction. Psi will change from engine to engine. On my engine of 260 cubes , i can run 30 psi no problem with my gt42-76 . On rajs car he could make more than 22 psi with the exact same turbo. Cubes and head flow is what determines the boost a turbo will put out.

To answer the original question, yes his turbo will go to 12 psi without any problems.

**TRBOBUICK** · 11-08-2009, 12:04 AM

Quote:

Originally Posted by foxbodydave

thanks, im kind of turbo illiterate. but im learning. have you ever messed with a blow thru carb? im curious about messing with a regular holley carb and making it a blow thru. what all is different

B arry grant used to make a specific blow thru carb. Floats are diff, jetting is diff , shafts are machined for o-rings, ect. Blow thru carbs are a pain in the ass.