I may just change out the belt for a newer one first. 
Upgrade from P1 to D1
Thread Starter
Joined: Nov 2001
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From: Sunny San Diego
Originally Posted by WHPLASH
Then that don't seem right then. I think KP was seeing 15+ with the 3.7"
Originally Posted by hosspowerinc
Im not quite sure whats wrong with 548 rwhp 563 rwtq???? 
Thread Starter
Joined: Nov 2001
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From: Sunny San Diego
Originally Posted by Slowhawk
Damn,didn't know you were running those pulleys and intercoolers.
Definite restriction. We run 3.7 pulleys and see 14lbs on 427ci setup's.
Definite restriction. We run 3.7 pulleys and see 14lbs on 427ci setup's.
I believe a FMIC will lower your boost because it flows better. The twins are a restriction. If you went with a FMIC your boost would go down, meaning you need a smaller pulley. 
Thread Starter
Joined: Nov 2001
Posts: 3,066
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From: Sunny San Diego
Well if the twin were a restrictions, wouldn't a FMIC let the engine see more boost? I know if you make the engine breathe better, there would be less boost.
What I don't get, is others with the twins are making over 600 rwhp and more boost. There is even one guy with a P1 doing it.
But it does make sense the twin could be a restriction. If I can get a good deal on a set of 4.5" I will try them first.
What I don't get, is others with the twins are making over 600 rwhp and more boost. There is even one guy with a P1 doing it.
But it does make sense the twin could be a restriction. If I can get a good deal on a set of 4.5" I will try them first.
you could fit a boost gauge before and after the intercoolers , to see IF and how much they restrict your flow/boost.
would be a shame to change your setup only to find out that wasn't the bottleneck, but something else (like belt slippage)
would be a shame to change your setup only to find out that wasn't the bottleneck, but something else (like belt slippage)
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