Heads/Cam going in....it's an unusual combo so I've got a few questions
Feb 28, 2005 | 09:43 AM
#61
Originally Posted by BigTex
Stock multilayer steel gaskets are 4.040 bore and .054 thick. I used a -7cc dish on the pistons , and -.008 out of the hole.
I built a little spreadsheet a while back so I could just plug in several variables and get the correct CR. It accounts for bore, stroke, dish, piston deck height, chamber, gasket bore, gasket thickness.
This is a simple comparison:
You are at 9.4:1 with a 71.33 chamber now. By dropping 4-5 ccs in the chamber, you won't gain a full point. For instance, the LQ4 @ 9.4:1 has a 7cc dish. The LQ9 @ 10.x:1 has flat tops. That 7cc only accounts for roughly .6 to .7 of a compression point.
I built a little spreadsheet a while back so I could just plug in several variables and get the correct CR. It accounts for bore, stroke, dish, piston deck height, chamber, gasket bore, gasket thickness.
This is a simple comparison:
You are at 9.4:1 with a 71.33 chamber now. By dropping 4-5 ccs in the chamber, you won't gain a full point. For instance, the LQ4 @ 9.4:1 has a 7cc dish. The LQ9 @ 10.x:1 has flat tops. That 7cc only accounts for roughly .6 to .7 of a compression point.
cmcguigan@triad.rr.com
preciate it
Feb 28, 2005 | 10:03 PM
#62
Originally Posted by 02sierraz71_5.3
lol save some trees!
btw how accurate is it?
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