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compression ? #1139047
12/19/11 12:09 AM
12/19/11 12:09 AM
Joined: Mar 2007
Posts: 501
ONTARIO,CANADA
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604 Hemi GTX Offline OP
mopar
604 Hemi GTX  Offline OP
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ONTARIO,CANADA
Trying to figure out my compression ratio with new heads. I've got a .055 over dish venolia piston in a 440 zero decked .039" heads gasket and B1-BS heads 65cc chamber. I'm hoping for close to 12:1 comp but not sure what it will be.
Thanks for any and all info
Kevin

Re: compression ? [Re: 604 Hemi GTX] #1139048
12/19/11 12:42 AM
12/19/11 12:42 AM
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Thumperdart Offline
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Should be more than that............try wallaceracingcalculators.....or something like that.


72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: compression ? [Re: 604 Hemi GTX] #1139049
12/19/11 12:47 AM
12/19/11 12:47 AM
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Ontario, Canada
Dodgem Offline
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Ontario, Canada
Well you have to know the cc of the dish!

Re: compression ? [Re: Dodgem] #1139050
12/19/11 01:05 AM
12/19/11 01:05 AM
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Posts: 501
ONTARIO,CANADA
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604 Hemi GTX Offline OP
mopar
604 Hemi GTX  Offline OP
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Joined: Mar 2007
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ONTARIO,CANADA
I couldn't find dish pistons on the venolia site but i looked at a couple of other sites and they look like -30 dish.
Kevin

Re: compression ? [Re: 604 Hemi GTX] #1139051
12/19/11 01:52 AM
12/19/11 01:52 AM
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Thumperdart Offline
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Quote:

I couldn't find dish pistons on the venolia site but i looked at a couple of other sites and they look like -30 dish.
Kevin


Forgot about that part...........


72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: compression ? [Re: 604 Hemi GTX] #1139052
12/19/11 04:50 AM
12/19/11 04:50 AM
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Bend,OR USA
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Cab_Burge Offline
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Contact Venolia with the piston part number or job number and get the exact CC for your pistons and the go to United(KB) Machine web site and click on the technical help or on line calculator and then compression ratio, plug your specs in, use + for the dish CC on your piston dome or valve relifs and it will give you a real close compression ratio My Ross custom dish pistons for 9.25 to 1 comp. ratio with 86 CC heads are 22.0 CC dish 4.375 bore with a 4.25 stroke, pistons are -.025 from the top of the deck


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: compression ? [Re: 604 Hemi GTX] #1139053
12/19/11 10:21 AM
12/19/11 10:21 AM
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HardcoreB Offline
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Quote:

...I'm hoping for close to 12:1 comp but not sure what it will be.




At 540" acheiving 12+ CR will be no problem with the proper distance for quench...even with a good sized dish. Personally I would CC the piston at TDC in the block. Find TDC, wipe some fine lithium grease around the piston crown to seal and then "CC".







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