Thread: How much boost
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Old 04-20-2018, 09:58 PM
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Tom Vaught Tom Vaught is offline
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Join Date: Dec 2001
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Originally Posted by wreckmastr View Post
Yes IAII iron block. 20-25# on a stock is brave.
X2, At some point the stock block just will not take it any longer at the higher boost pressures and the main web area or the main caps will crack.

First #2 cap then #4 cap, and then #3 cap.

Saw it happen on other stock Pontiac 455 Blocks.

Tom V.

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