Quote:
Originally posted by NotchJohnson
Yeah I knew that number wouldnt be exactly right since you are decking the block, but I figured it would give you some idea.
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judging from the chamber equition i should be around 9.5 to one .........educated guess
the difference in bore will change the eqution a bit just in the chambers
but ......having the different pistons ,i'm not sure how much higher in the bore the new ones are as compared to the old ones .....plus i noticed on the stock pistons there was a tiny dish ....the new ones are a striat flat top
from what i gather the deck can't really be milled alot closer since you have to maintain a safe distance and i didn't want the piston above the deck (i've heard of guys bringing the piston up to the gasket thickness.....didn't want to go that close),
i'm not sure the exact numbers (pretty novice at this stuff ) ....but i told him to mill the block as close as you can to the pistons ......whitch should change the compression even if its only like thousants of an inch
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the "not so old",old guy
87 Mustang GT T-top >hanlon t-5, pro 5.0, centerforce clutch ,adj. cable/quatrant ,3.27s ,full 2 1/2 ex(off road H) adj. reg. ,e-cam ,70mm TB, cobra intake ,1.7rr ,ported/milled e7ets w/crane springs ,306 balaced/decked short block w/speed pro forged flat top pistons ...257rwhp/302rwt
best et 13.7@102 (4/11 )
'80 Capri (future project,currently collecting parts for 351 moter)
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