Compression Ratio

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Fast Ed 53
Posts: 97
Joined: Sat Sep 25, 2004 2:44 am
Location: So. Illinois

Compression Ratio

#1

Post by Fast Ed 53 » Sun Feb 22, 2004 11:43 pm

Just pulled my engine to clean up and have a look. Previous owner has recently installed a set of 7 to 1 slugs.What do you guys think about this ratio? I had planned to freshen it up and go back up on comp. a little, thought I would see what you guys think. I hav'nt leaked it but the plugs look good. Thanks, Ed



Jack_Hester
Posts: 414
Joined: Sat Sep 18, 2004 7:21 pm
Location: Roxboro, NC, U.S.A.
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Re: Compression Ratio

#2

Post by Jack_Hester » Thu Feb 26, 2004 10:36 am

FastEd -

If you are building a road bike, the 7 to 1's will work just fine. I have a friend's bike in my shop, that I put 7.5 to 1 pistons in, back in the Winter of 1981/82. I have it to do a ring job. But, other than that, he's been completely satisfied with it's performance. Runs 87 octane in it, and can still outrun most of the traffic on the road.

Jack

Fast Ed 53
Posts: 97
Joined: Sat Sep 25, 2004 2:44 am
Location: So. Illinois

Re: Compression Ratio

#3

Post by Fast Ed 53 » Thu Feb 26, 2004 12:19 pm

Andrew, Thanks for the reply. Stock cam or something different? Ed

Jack_Hester
Posts: 414
Joined: Sat Sep 18, 2004 7:21 pm
Location: Roxboro, NC, U.S.A.
Contact:

Re: Compression Ratio

#4

Post by Jack_Hester » Sat Feb 28, 2004 9:51 pm

FastEd -

Stock cam will work fine. My friend's bike has an Andrews A-Grind. A little peppier than stock.

Jack

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