What is Your Compression Ratio?
Thread Starter
Melting Slicks
Joined: Jun 2000
Posts: 3,215
Likes: 6
From: Tampa Florida
What is Your Compression Ratio?
Soon I will be reinstalling my LT4 cylinder heads and figured I would take a pole of various compression ratios folks are running on the street (pump gas).
I know the stock LT4 ratio is 10.8 so this is geared toward the modified LT1/4 type engines...
I'm looking at 11.3 to 1 when complete.
:)
I know the stock LT4 ratio is 10.8 so this is geared toward the modified LT1/4 type engines...
I'm looking at 11.3 to 1 when complete.
:)
Burning Brakes
Joined: Oct 2002
Posts: 1,152
Likes: 1
From: Wichita KS
Re: What is Your Compression Ratio? (No Go)
Mine is 11.54, I actually calculated all of the crevice volume's Etc...
No problems at all, and I haven't seen any odd/high knock counts on my Datamaster scans...I've only used 92-93 octane in it though.
I also kept my quench area to a minimum, which help's eliminate detonation.
I'd need to double check my notes but .018 deck height + .029 head gasket, so I ended up with .047 quench height...
No problems at all, and I haven't seen any odd/high knock counts on my Datamaster scans...I've only used 92-93 octane in it though.
I also kept my quench area to a minimum, which help's eliminate detonation.
I'd need to double check my notes but .018 deck height + .029 head gasket, so I ended up with .047 quench height...
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Thread Starter
Melting Slicks
Joined: Jun 2000
Posts: 3,215
Likes: 6
From: Tampa Florida
Re: What is Your Compression Ratio? (Monks)
Thanks folks!
To think 10-15 years ago...anything over 10 to 1 would have been race gas territory with iron heads and carbs, etc!
I may even try for something closer to 12 to 1 when the new shortblock is assembled...will have to see how this cr works on the roadcourse, etc first though...
Awesome!
:)
To think 10-15 years ago...anything over 10 to 1 would have been race gas territory with iron heads and carbs, etc!
I may even try for something closer to 12 to 1 when the new shortblock is assembled...will have to see how this cr works on the roadcourse, etc first though...
Awesome!
:)
Drifting
Joined: May 2001
Posts: 1,392
Likes: 0
From: Wabash,IN
CI 7-8-9-10 Veteran
St. Jude Donor '08
Re: What is Your Compression Ratio? (superlund)
I wish i knew what my comp. ratio was LOL guy built my motor never told me then when i aske he didnt know LOL :crazy: :_dupe:
