What boost are you getting with your pulleys?
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11 Second Club
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From: Indianapolis Area
What boost are you getting with your pulleys? I am just curious about what boost levels others are getting with what pulley combos. Mainly D1SC and F1Rs. If you would also list the following mods:
Motor size
Heads
Camshaft
Intake system
Exhaust
Intercooler size and type
Pressure pipe size
Crank and supercharger pulley
Observed Boost @ what RPM
I have a theory on something, but I need some data to check it. All help is appreicated.
OK, here is my example
402 Iron Block
Dart 240cc TEA heads
TSP Giant Camshaft
Edelbrock SP, IntakeElbow, NW 90mm
Edelbrock Drag Race Headers & 3" Duals
Spearco A2W 3"
SDPC 7.25", 4.25 (1.81:1)
10psi @ 6000, 12psi @ 7000
Motor size
Heads
Camshaft
Intake system
Exhaust
Intercooler size and type
Pressure pipe size
Crank and supercharger pulley
Observed Boost @ what RPM
I have a theory on something, but I need some data to check it. All help is appreicated.
OK, here is my example
402 Iron Block
Dart 240cc TEA heads
TSP Giant Camshaft
Edelbrock SP, IntakeElbow, NW 90mm
Edelbrock Drag Race Headers & 3" Duals
Spearco A2W 3"
SDPC 7.25", 4.25 (1.81:1)
10psi @ 6000, 12psi @ 7000
Last edited by Gold Phoenix; Aug 6, 2007 at 11:54 AM.
For comparison sake here is two D1SC setups we've had in the shop lately. Both made around the same horsepower.
Note setup no2 would have made beyond 15psi with a 4.10" pulley and pushings nearly 700rwhp on a stock block
Changing it to a 4.25 pulley I had brough it to 12 or so PSI.
setup no1/no2
Motor size 347 / 346
Heads AFR 225/ TSP 317 heads
Camshaft SI SC1/ TSP 232/234 112
Intake system FAST90/ Fast 90
Exhaust kooks 1 7/8 / 1 3/4?
Intercooler size and type ATI/ OBX FMIC
Pressure pipe size ? ?
Crank and supercharger pulley 3.85/4.25
Observed Boost @ what RPM 12@6200 / 12@6200
Note setup no2 would have made beyond 15psi with a 4.10" pulley and pushings nearly 700rwhp on a stock block
Changing it to a 4.25 pulley I had brough it to 12 or so PSI.setup no1/no2
Motor size 347 / 346
Heads AFR 225/ TSP 317 heads
Camshaft SI SC1/ TSP 232/234 112
Intake system FAST90/ Fast 90
Exhaust kooks 1 7/8 / 1 3/4?
Intercooler size and type ATI/ OBX FMIC
Pressure pipe size ? ?
Crank and supercharger pulley 3.85/4.25
Observed Boost @ what RPM 12@6200 / 12@6200
Thread Starter
11 Second Club
iTrader: (1)
Joined: Jan 2002
Posts: 1,161
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From: Indianapolis Area
Originally Posted by Fraser@SpeedInc
For comparison sake here is two D1SC setups we've had in the shop lately. Both made around the same horsepower.
Note setup no2 would have made beyond 15psi with a 4.10" pulley and pushings nearly 700rwhp on a stock block Changing it to a 4.25 pulley I had brough it to 12 or so PSI.
setup no1/no2
Motor size 347 / 346
Heads AFR 225/ TSP 317 heads
Camshaft SI SC1/ TSP 232/234 112
Intake system FAST90/ Fast 90
Exhaust kooks 1 7/8 / 1 3/4?
Intercooler size and type ATI/ OBX FMIC
Pressure pipe size ? ?
Crank and supercharger pulley 3.85/4.25
Observed Boost @ what RPM 12@6200 / 12@6200
Note setup no2 would have made beyond 15psi with a 4.10" pulley and pushings nearly 700rwhp on a stock block
Changing it to a 4.25 pulley I had brough it to 12 or so PSI.setup no1/no2
Motor size 347 / 346
Heads AFR 225/ TSP 317 heads
Camshaft SI SC1/ TSP 232/234 112
Intake system FAST90/ Fast 90
Exhaust kooks 1 7/8 / 1 3/4?
Intercooler size and type ATI/ OBX FMIC
Pressure pipe size ? ?
Crank and supercharger pulley 3.85/4.25
Observed Boost @ what RPM 12@6200 / 12@6200
Thread Starter
11 Second Club
iTrader: (1)
Joined: Jan 2002
Posts: 1,161
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From: Indianapolis Area
Originally Posted by Blownramair
3.7bp with 7.25cp 12# at 6700
3.4bp with 7.25cp 15# at 6800
ls6 heads
fast intake
fmic
3.4bp with 7.25cp 15# at 6800
ls6 heads
fast intake
fmic
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Thread Starter
11 Second Club
iTrader: (1)
Joined: Jan 2002
Posts: 1,161
Likes: 1
From: Indianapolis Area
Originally Posted by Gold Phoenix
Is the rest of your motor is stock? That seems to be some pretty low laptimes for a stock internal motor.
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