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Whats my compression #79313
06/24/08 08:50 PM
06/24/08 08:50 PM
Joined: Oct 2005
Posts: 327
Florida
72greencuda Offline OP
enthusiast
72greencuda  Offline OP
enthusiast

Joined: Oct 2005
Posts: 327
Florida
340-416 .30 over diamond flat top pistons, the card says 10.9 compression w/65cc head. My heads are standard J's small valve 71 cc's Can u tell what my compression going to be? Thanks

Re: Whats my compression [Re: 72greencuda] #79314
06/24/08 09:33 PM
06/24/08 09:33 PM
Joined: Feb 2003
Posts: 12,675
Columbia, CT
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moper Offline
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moper  Offline
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Joined: Feb 2003
Posts: 12,675
Columbia, CT
You can only guess without real numbers. If the block was milled to properly set deck hieght (not to clean up the decks, but to blueprint it), and the heads are not milled, you have about 72cc or larger heads. Prob be closer to 10.5ish depending.
Too high for an iron head engine that needs a high level of vacuum. (meaning smaller cam)


Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.
Re: Whats my compression [Re: moper] #79315
06/24/08 09:44 PM
06/24/08 09:44 PM
Joined: Oct 2005
Posts: 327
Florida
72greencuda Offline OP
enthusiast
72greencuda  Offline OP
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Joined: Oct 2005
Posts: 327
Florida
The cam I was running prior is a hydraulic comp x268. should I use it. 727 w/3000 stall. Im open to a new combo for this 416. Street car 15 inch wheels 27 inch tire

Re: Whats my compression [Re: 72greencuda] #79316
07/13/08 10:30 AM
07/13/08 10:30 AM
Joined: Jan 2003
Posts: 7,978
Bethel Ct
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AdamR Offline
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Joined: Jan 2003
Posts: 7,978
Bethel Ct
XE268 is likely to small for a 416, especially if you plan on running pump gas with over 10:1 compression.

Re: Whats my compression [Re: AdamR] #79317
07/13/08 11:10 AM
07/13/08 11:10 AM
Joined: Jan 2003
Posts: 25,200
Upper Midwest
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MoparforLife Offline
Too Many Posts
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Joined: Jan 2003
Posts: 25,200
Upper Midwest







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