Will this combo run on 91?
+2
Dave De
Muddy557
6 posters
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Re: Will this combo run on 91?
Yes in a vehicle less than 4,000 pounds but 93 would be more safe and may allow 38 degrees total timing that those heads will like over your stated 35 degrees.
Dave De- Posts : 797
Join date : 2011-05-27
Location : Highland, MI
Mark Miller and Muddy557 like this post
Re: Will this combo run on 91?
What size is this motor? 557?
BBFTorino- Posts : 999
Join date : 2015-12-31
Re: Will this combo run on 91?
BBFTorino wrote:What size is this motor? 557?
Pistons show 3.85" stroke
Dave De- Posts : 797
Join date : 2011-05-27
Location : Highland, MI
Muddy557 likes this post
Re: Will this combo run on 91?
.040 over 460, roughly a 468
BBFTorino wrote:What size is this motor? 557?
Muddy557- Posts : 11
Join date : 2017-01-19
Re: Will this combo run on 91?
I have a very similar combo to you. My d0ve heads are milled down to 66cc so compression should be similar and my cam is 251/260 .606-.632 108ls solid flat tappet. My trucks 4100lbs and I run it on 93 with 40* timing
droppedf100- Posts : 176
Join date : 2009-09-28
Location : South Jersey
Mark Miller and Muddy557 like this post
Re: Will this combo run on 91?
Thanks for the replies guys , does anyone have a rough guess what the comp ratio would be with a set of d3’s instead of the doves ?
Muddy557- Posts : 11
Join date : 2017-01-19
Re: Will this combo run on 91?
8.48/1 assuming 95cc on the D3's
http://www.wallaceracing.com/cr_test2.php
I started with your claimed 10.125/1 compression and only changed the head cc's.
http://www.wallaceracing.com/cr_test2.php
I started with your claimed 10.125/1 compression and only changed the head cc's.
supervel45- Posts : 4502
Join date : 2013-09-04
Muddy557 likes this post
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