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new pistons: going down the checklist

Thats what i am saying l36 block and you will be fine. The main thing i would suggest to keep from killing it would be headers.
 


I wouldn't run a 3.4" on high comp unless you have a cam or intercooler of some sorts. Keep the stock size and turn up the timing
 
minichopper6hp said:
Yea that will be fine. I was just trying to say that factory front manifold and dp = boom on higher compression.
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Gotchya, when I first read about the front manifold it was about the first thing changed out.

bluegtp91 said:
I wouldn't run a 3.4" on high comp unless you have a cam or intercooler of some sorts. Keep the stock size and turn up the timing
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No worries, the 3.4" isn't even going to be considered till I get plenty of other flow mods, shooting for stock size.
 
Sandman said:
No worries, the 3.4" isn't even going to be considered till I get plenty of other flow mods, shooting for stock size.
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Smart man...you don't need more boost with the upped compression...the point of high compression is to make all that power with half the boost
 


bluegtp91 said:
Smart man...you don't need more boost with the upped compression...the point of high compression is to make all that power with half the boost
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so "in a perfect world" the high comp would be roughly two sizes/one "step" behind the low comp? Similar to a Gen V versus Gen III?
 
matt5112 said:
so "in a perfect world" the high comp would be roughly two sizes/one "step" behind the low comp? Similar to a Gen V versus Gen III?
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that would be the way to go about it. youll make the same power on lower boost with a higher compression motor with identicle setups.
 


Doing some more reading I found this in the "how to safely modify your car" thread

High Ratio Rockers – Thankfully GM made one thing simple…pushrod motors!! Stock GT/GTP cars came with 1.60:1 or 1.66:1 Ratio Rockers from the factory. There are a few choices that you have here to make some more power by letting those valves open more...
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Which cars/heads had the 1.66:1 rockers? If I already don't have them on my car I figured to snag a set since every little bit helps.
 


be forewarned.....be prepared for possible headwork and all new valves. My piston thrashing also tore up my exhaust valves and seats.
 
ya a valve job should be done on any rebuild though I didnt have to replace valves but the seats were all trashed

ANd heads were cracked wich is pretty typical
 
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