bore size
Moderator
Joined: Apr 2002
Posts: 814
Likes: 0
From: Murrieta
Don't listen to these wussies... 
I'm running mine at 4.080". Now, I've only had the motor running for about a week but I've managed 400 break-in miles including a 100-mile trip and some "spirited" road tests. Car feels great. I'll post more info after I get it dyno-tuned next weekend.
I'm running mine at 4.080". Now, I've only had the motor running for about a week but I've managed 400 break-in miles including a 100-mile trip and some "spirited" road tests. Car feels great. I'll post more info after I get it dyno-tuned next weekend.
Teching In
Joined: Jan 2004
Posts: 7
Likes: 0
I think first you need to make sure you have enough cylinder before you try to make the hole bigger. Some engines will go to 4.080 but then your cylinder wall thickness is very thin, then you have cylinder wall flex which will make you loose power. Most engines will go out to .060 over no problem, but more could have ill effects.
But check with your engine builder and some local machine shops to see what they say, Ask people Lots of people.
But check with your engine builder and some local machine shops to see what they say, Ask people Lots of people.
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