Thanks
Compression ratio recommendations...
Thread Starter
Le Mans Master
Joined: Mar 2000
Posts: 8,950
Likes: 4
From: Lafayette LA
Compression ratio recommendations...
I'm looking for compression ratio recommendations for a naturally aspirated 383 LT1, track only car. I will be running 93 octane in it.
1) How high can I go?
2) Any benefits of going higher/lower?
1) How high can I go?
2) Any benefits of going higher/lower?
Safety Car
Joined: May 2002
Posts: 4,659
Likes: 82
From: Toronto ontario
what kind of track? if its road racing you'll be running hotter for longer so maxing the compression won't be fun if you get days with not so up-to-par gas especially in hot weather. I've seen high as 11.8 on the street and most I believe are around 11-11.5.
Team Owner
Joined: Jan 2003
Posts: 20,297
Likes: 240
From: Summerland B.C. Canada
You need to be concerned with dynamic compression and not static compression. Your cam choice will tell you what you can get away with. My 10.5 static compression turns into 8.5 dynamic compression, with the cam i a running. Use one of the many free calculators on the net.
Team Owner
Joined: Jan 2003
Posts: 20,297
Likes: 240
From: Summerland B.C. Canada
Thread Starter
Le Mans Master
Joined: Mar 2000
Posts: 8,950
Likes: 4
From: Lafayette LA
Melting Slicks
Joined: Jun 2000
Posts: 3,215
Likes: 6
From: Tampa Florida
I've got 11.9 CR static, but have not computed a dynamic number.
My GM847 cam probably keeps it manageable...296/304 duration, etc.
Lots of road racing, pump gas only, 15,000 miles so far.
My GM847 cam probably keeps it manageable...296/304 duration, etc.
Lots of road racing, pump gas only, 15,000 miles so far.
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Team Owner
Joined: Jan 2003
Posts: 20,297
Likes: 240
From: Summerland B.C. Canada
Yeah, that duration should keep your DCR in a safe place.
