How much HP gain from raising compression?
03-21-2006, 03:07 PM
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How much HP gain from raising compression? Say I have a Forged H/C motor running stock compression.
How much would I gain if I were to pull the heads, mill them down and bump compression to 11.5-12:1.
Next question, Say I've got a 200 shot of N20. Would that be too much for that high of a compression?
Car already has ARP Head bolts and Cometic Gaskets.
How much would I gain if I were to pull the heads, mill them down and bump compression to 11.5-12:1.
Next question, Say I've got a 200 shot of N20. Would that be too much for that high of a compression?
Car already has ARP Head bolts and Cometic Gaskets.
03-21-2006, 03:24 PM
#2
Originally Posted by jaypee1217
Say I have a Forged H/C motor running stock compression.
How much would I gain if I were to pull the heads, mill them down and bump compression to 11.5-12:1.
Next question, Say I've got a 200 shot of N20. Would that be too much for that high of a compression?
Car already has ARP Head bolts and Cometic Gaskets.
How much would I gain if I were to pull the heads, mill them down and bump compression to 11.5-12:1.
Next question, Say I've got a 200 shot of N20. Would that be too much for that high of a compression?
Car already has ARP Head bolts and Cometic Gaskets.
Approximately 2% for half a point… You really need to find out what your DCR is and what it will be to find out if it will run on 93 octane...
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03-21-2006, 03:42 PM
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i've got Crower 6.125 Length Rods, Diamond Piston w/ a 2cc valve relief, stock 346 crank.
5.3L heads that are already milled .15. I cant remember what the intake runner size is:dunno:
5.3L heads that are already milled .15. I cant remember what the intake runner size is:dunno:
03-21-2006, 03:51 PM
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Originally Posted by orangeapeel
well the valve relief will take a tad bit away from what you had to start with.
03-21-2006, 04:05 PM
#19
Ok, so you have a big cam that will enjoy having the hose on it. Im not sure what would be a safe bet for a 200 shot on those heads wihtout physically checking. you probably can take a tad more material off, but it might be more trouble than it is worth. Just get a tornado and stuff it in the bellow and call it a day. 
03-21-2006, 04:08 PM
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Originally Posted by orangeapeel
Ok, so you have a big cam that will enjoy having the hose on it. Im not sure what would be a safe bet for a 200 shot on those heads wihtout physically checking. you probably can take a tad more material off, but it might be more trouble than it is worth. Just get a tornado and stuff it in the bellow and call it a day.
