How to find compression ratio??
#1
How to find compression ratio??
What do i need to tell my mechanic if he wants to know the compression ratio. I know the pistons are keith black hypereutectic and the crank and rods are typical 383 parts. The heads and deck were plained and the bowls are stock on the heads. Do you need more specifics to find the CR? Thanks, Brian
If you can help me find this info then i can plug it into my compression ratio calculator.
Engine bore that has been 30 thousenths over
Engine stroke with the 383 rods
Deck height with 5 thousandths removed
Regular gasket thickness
stock cly. head (cc)
and its got flat top pistons
If you can help me find this info then i can plug it into my compression ratio calculator.
Engine bore that has been 30 thousenths over
Engine stroke with the 383 rods
Deck height with 5 thousandths removed
Regular gasket thickness
stock cly. head (cc)
and its got flat top pistons
Last edited by Briank8811; 08-24-2004 at 02:24 PM.
#2
Re: How to find compression ratio??
Originally Posted by Briank8811
If you can help me find this info then i can plug it into my compression ratio calculator.
Engine bore that has been 30 thousenths over
Engine stroke with the 383 rods
Deck height with 5 thousandths removed
Regular gasket thickness
stock cly. head (cc)
and its got flat top pistons
Engine bore that has been 30 thousenths over
Engine stroke with the 383 rods
Deck height with 5 thousandths removed
Regular gasket thickness
stock cly. head (cc)
and its got flat top pistons
2. The stroke is 3.75 in most cases.
3. I take it you mean it was zero decked, if so the deck height is 0.
4. Do you mean stock head gasket thickness? If so its either .049 or .054. I have seen both listed so I am unsure which.
5. 52cc.
6. Do they have valve reliefs? You really have to look at the spec sheet for the pistons.
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