Technical Help: Bleeding Boost
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On The Tree
Joined: Oct 2002
Posts: 114
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From: Chicago
Technical Help: Bleeding Boost A buddy from work has a 4000lb 1972 Skylark with the following mods:
355 CI Chevy
6in rods
Wiseco blower pistons 8.75:1
World Products Sportsman 2 heads 2.02 / 1.60 ported well, 76cc.
Comp Cams hydraulic roller 224Intake, 230Exhaust, 0.560 lift 112 degree.
Induction edelbrock proflo looks like a small victor junior with small ports.
FAST bank to bank with 55 lb injectors.
1.75 headers.
P1SC run at 57Krpm making 10- 11 psi boost at 6300RPM
3.37 gears
700R4
What he wants to know is if the 112 degree LSA is bleeding boost at all and if so how can you measure this. He's making good boost and it doesn't drop on him, but will he make more if he went with a 114 LSA? His engine builder doesn't think it's a problem with the set-up he has...He basically said if it's bleeding boost it won't bleed a whole lot. Comp cams said it would be better on a 114 LSA. I realize this but I am looking for a way to check..if that's even possible.
Also what benefits would you have on a 112 LSA as opposed to a 114 in a forced induction application if bleeding boost wasn't an issue or a minor issue?
Thanks for the help.
355 CI Chevy
6in rods
Wiseco blower pistons 8.75:1
World Products Sportsman 2 heads 2.02 / 1.60 ported well, 76cc.
Comp Cams hydraulic roller 224Intake, 230Exhaust, 0.560 lift 112 degree.
Induction edelbrock proflo looks like a small victor junior with small ports.
FAST bank to bank with 55 lb injectors.
1.75 headers.
P1SC run at 57Krpm making 10- 11 psi boost at 6300RPM
3.37 gears
700R4
What he wants to know is if the 112 degree LSA is bleeding boost at all and if so how can you measure this. He's making good boost and it doesn't drop on him, but will he make more if he went with a 114 LSA? His engine builder doesn't think it's a problem with the set-up he has...He basically said if it's bleeding boost it won't bleed a whole lot. Comp cams said it would be better on a 114 LSA. I realize this but I am looking for a way to check..if that's even possible.
Also what benefits would you have on a 112 LSA as opposed to a 114 in a forced induction application if bleeding boost wasn't an issue or a minor issue?
Thanks for the help.
