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#1
02-05-2017, 06:52 PM
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One example:
From HO Racing book a graph showing the CR change percentage: (nothing to do with me so don't shoot the messenger again) CR Change  
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John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! W.E.C moment "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
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#2
02-05-2017, 07:51 PM
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Quote:
Not very easy is it John. Same deal for percentage changes with 16 to 1 engines and 930 hp engines. Bet Craig would have killed for a 930 HP engine when he and Kern wrote the book. So then you have to go with real data like single cylinder engine testing where a full sweep of the engine's compression ratios is done and the power levels documented. It was a basic Generic question and we gave generic answers, so how about we call this one a TIE? So what data did you base your calculator program on? Smith, Vizard, Speed Talk? Tom V.
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
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#3
02-05-2017, 09:48 PM
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Tom, ask Craig maybe?
Really if you knew anything about it, you would know that basically anything more than 13:1 CR the advantage to gaining HP is vastly dropping. LOOK at the curve! It's starts going straight up almost at 13:1, continue the graph and the percentage is practically nil. (from 13 on up) Ask any of the big guys, I didn't decide this. Just admit you are wrong. 
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John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! W.E.C moment "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
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#4
02-05-2017, 10:48 PM
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It would be nice to know cam spec also to compare to to other builds.I just dynoed my 541 and it makes over 900 on pump gas with around a 700 lift cam.And its not a happy dyno my buddy dyned there went to the track and showed 15-20 horse more.
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