59cc heads...
Thread Starter
Racer
Joined: Jul 2009
Posts: 300
Likes: 0
From: South Bend IN
59cc heads...
Looking at a set of ported 243's that have 59cc chambers. Just wondering what issues I may run into if I pick these up. What compression ration would that put a stock ls1 at? Would it be OK on pump gas 92-93 octane. Any fly cutting needed? I do not have a cam yet, but would be buying and installing it with the heads. If so is it easily offset with using thicker head gaskets to get them back closer to the stock cc for these heads.
AMP Racing
Joined: Aug 2006
Posts: 10,758
Likes: 589
From: Washington TWP NJ
2023 C5 of the Year Finalist - Modified
2017 C5 of Year Finalist
St. Jude Donor '09-'10-'11-'12
Pump gas should be fine with those heads.
Talk to your tuner and/or whomever you're getting the cam from. They should be able to tell you if you need to fly cut.
For what it's worth, fly cutting is no big deal.
Talk to your tuner and/or whomever you're getting the cam from. They should be able to tell you if you need to fly cut.
For what it's worth, fly cutting is no big deal.
Premium Supporting Vendor
Joined: Sep 2008
Posts: 134
Likes: 0
With 59cc chambers the compression will be at 11.1:1. Pump gas will work no problem on that kind of compression. Flycutting will depend on the size of your cam. Do you know the specs? Its always best to measure piston to valve before actually firing the motor once you get the cam in.
Thread Starter
Racer
Joined: Jul 2009
Posts: 300
Likes: 0
From: South Bend IN
With 59cc chambers the compression will be at 11.1:1. Pump gas will work no problem on that kind of compression. Flycutting will depend on the size of your cam. Do you know the specs? Its always best to measure piston to valve before actually firing the motor once you get the cam in.
Safety Car
Joined: Oct 2007
Posts: 3,903
Likes: 1
From: You know your drunk when you swerve to miss the tree then you realize its your air freshener! Covington Ga
I would say something around 228ish, or go big and get a MS3. I love the sound of mine!
Last edited by 0331MARINE; Nov 30, 2010 at 07:22 PM.
AMP Racing
Joined: Aug 2006
Posts: 10,758
Likes: 589
From: Washington TWP NJ
2023 C5 of the Year Finalist - Modified
2017 C5 of Year Finalist
St. Jude Donor '09-'10-'11-'12
Texas Speed has a great selection of cams - from mild to wild...
As do other vendors on here. look around and ask on here... you'll get lots of different advice. there are a lot of videos on youtube of different cams as well.
As do other vendors on here. look around and ask on here... you'll get lots of different advice. there are a lot of videos on youtube of different cams as well.
Drifting
Joined: Jan 2008
Posts: 1,722
Likes: 138
From: Florida
St. Jude Donor '09
Looking at a set of ported 243's that have 59cc chambers. Just wondering what issues I may run into if I pick these up. What compression ration would that put a stock ls1 at? Would it be OK on pump gas 92-93 octane. Any fly cutting needed? I do not have a cam yet, but would be buying and installing it with the heads. If so is it easily offset with using thicker head gaskets to get them back closer to the stock cc for these heads.
Le Mans Master
Joined: Aug 2005
Posts: 5,375
Likes: 328
From: CA.
St. Jude Donor '13-'14-'15
LS6 243 castings come with 64cc chambers. I would ask how the seller how they achieved 59cc, weld build-up or shaving. If they were shaved I suggest you check for the desired push rod length with the push rod length checking tool, you may have to vary it to maintain optimum lifter pre-load.
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