Re: How much compression is too much?
[Re: '72CudaRacer]
#2464556
03/11/18 01:51 AM
03/11/18 01:51 AM
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Joined: Jan 2003
Posts: 6,591 Canton, Ohio
Sport440
master
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master
Joined: Jan 2003
Posts: 6,591
Canton, Ohio
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No real advantage with that much compression, over say around 15.1 comp but if its together as stated you can run it the way it is, just use the correct fuel. Your wider LSA will help with the extra comp. I would just leave it as is and then on next tear down, address the comp issue. Diesels run up to 25.1 ratios, fx high rpm 18000 rpm gas motors run 17.1 comp to assist at that rpm. So you are at Top level comp with your motor. Also, for Just a Bracket motor, you really don't need a 620 ci as well. To me you have a Max built et motor. Send it to me and I will send you a reliable 448 Bracket motor. No Charge.
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Re: How much compression is too much?
[Re: sgcuda]
#2464825
03/11/18 05:25 PM
03/11/18 05:25 PM
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Joined: Jan 2003
Posts: 6,591 Canton, Ohio
Sport440
master
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master
Joined: Jan 2003
Posts: 6,591
Canton, Ohio
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Are you on 4.800" bore centers? That's a lot of compression to seal a head gasket with not a lot of room between bores. The Koleno blocks are on a 4.8 centers, with a 4.60 bore that gives a .200 space center of sealing surface.
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Re: How much compression is too much?
[Re: Dave Hall]
#2464901
03/11/18 08:26 PM
03/11/18 08:26 PM
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Joined: Aug 2003
Posts: 1,575
KOS
pro stock
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pro stock
Joined: Aug 2003
Posts: 1,575
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Run VP Q16 and go haul a$$ with it. my sediments exactly.........just make sure carb is calibrated for it.
Last edited by KOS; 03/11/18 08:27 PM.
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Re: How much compression is too much?
[Re: Dave Hall]
#2464904
03/11/18 08:36 PM
03/11/18 08:36 PM
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Joined: Feb 2005
Posts: 20,179 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,179
PA.
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Run VP Q16 and go haul a$$ with it. It’s one thing to run a heads up program with usually 4 rounds max compared to a bracket program with 7 or more rounds. How much does Q16 cost a gallon again. I think 55 gallons of alcohol was around 165.00 Last year.
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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