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  • 1965 - 1973 Classic Mustangs -General/Talk-

351w Build, Compression Ratio? Build

  • Thread starter Thread starter zdoty0710
  • Start date Start date Mar 2, 2017
Z

zdoty0710

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Mar 2, 2017
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Mar 2, 2017
#1
  • Mar 2, 2017
  • #1
I'm in progress in swapping a 351W I had it machined and cleaned up, bored .030 over in my 66 coupe. I have extra time on my hands so instead of having it built, I took it in my own hands to build it. When I'm coming trying to calculate the compression so I know which fuel to run I get a different results so I'm looking for a little help. A list of all essential componets:
-block is a 85' 351W stock crank, rods
-KB124-030 pistons: +6.500cc
-Twisted wedge heads: 61cc combustion chamber
-Head Gasket Thickness: 0.039
-Cam: Comp Cams SK35-246-3
-Intake: Weiand Stealth Intake

Thanks
 

RaggedGT

Been here over a DECADE and still no CT
Mod Dude
Jul 20, 2014
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Taylorsville ky
Mar 2, 2017
#2
  • Mar 2, 2017
  • #2
Hope these help

View: https://m.youtube.com/watch?v=OGuOMItsCXk



View: https://m.youtube.com/watch?v=qu0Y66AOGSg


I'll tag a couple people that may have a better way/answer for ya-
@madmike1157 @Boosted92LX @karthief @90sickfox
 

Boosted92LX

It's only an inch or two. What's the big deal?
15 Year Member
Dec 19, 2010
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Mar 3, 2017
#3
  • Mar 3, 2017
  • #3
This doesn't tell what thickness headgasket they used, but piston manufacturers always give a compression ratio with different cc heads for the pistons they sell.

Here are yours:
This is claiming 10.8:1 with 60 cc heads and you have 61's. You are looking at premium fuel at minimum.
 
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