Iron 118cc heads to aluminum 110cc , how much will comp ratio change?
03-15-2006, 11:36 AM
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Re: Iron 118cc heads to aluminum 110cc , how much will comp ratio change?
Found this on the web. Help ya with the math
http://www.kb-silvolite.com/calc.php?action=comp
http://www.kb-silvolite.com/calc.php?action=comp
03-15-2006, 12:32 PM
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Re: Iron 118cc heads to aluminum 110cc , how much will comp ratio change?
Originally Posted by 1BIGJIM
I was planning on running the Air-GAP?
Any other ideas?
Any other ideas?
There was a guy here a while back that saw good gains on the dyno switching to the single plane Vector Jr. on those heads.
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Patrick
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03-16-2006, 10:16 AM
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Re: Iron 118cc heads to aluminum 110cc , how much will comp ratio change?
yes they were E-brocks. This is not uncommon, more like the norm. The chambers are cast so there will be some variance.
DCR has alot to do with how much static you can run
DCR has alot to do with how much static you can run
03-16-2006, 10:52 AM
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Re: Iron 118cc heads to aluminum 110cc , how much will comp ratio change?
Originally Posted by racinfever
Big Jim I am running a 540 NA with aluminum heads , compression ratio almost 10.1 40 degrees timing & using 89 octain fuel for 9 years. Motor runs great made 720 hp on dyno. Have built other motors similar even with efi with great success. 
I don't think my wallet would survive.
