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#1
03-04-2013, 08:28 PM
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Valve event calculator for Pontiac Engines?
Is there an Excel based valve event calculator for Pontiac engines? You know, plug in your block and reciprocating assembly information for S/D compression values and also customize duration, LSA/ICL for desired valve events and overlap.
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#2
03-04-2013, 08:39 PM
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Not sure what you are wanting?
Dyno type program? Or just some calcs? Look here for some calculators that may work for you: Calculators 
__________________
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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#3
03-04-2013, 08:55 PM
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Many Thanks. Great stuff in that link.
Have been using the below for VEs. Another full page one for different compression.(too large to copy/paste) Of course, formulas are lost in pasting into non-Excel. It is a linked formula which demos changes in outputs when relevant inputs are changed. Obtained from stickies section of LS1tech.com so the compression section is LS1 specific. Wondering if there was a Pontiac version. Inputs lobe specific 0.006 0.050 0.200 Intake Duration - ID 285 222 157 Exhaust Duration - ED 281 226 153 Lobe Center Angle - LCA LSA 112 115 112 Intake Centerline - ICL 108 112 108 outputs: Intake Valve opens - IVO 34.5 -1 -29.5 BTDC (- indicates ATDC) Intake Valve closes - IVC 70.5 43 6.5 ABDC Exhaust Valve Opens - EVO 76.5 51 12.5 BBDC Exhaust Valve Closes - EVC 24.5 -5 -39.5 ATDC (- indicates BTDC) Exhaust Centerline - ECL 116 118 116 Overlap 59 -6 -69 degrees Last edited by Felix C; 03-04-2013 at 09:02 PM. |
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#4
03-05-2013, 08:57 AM
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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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#5
03-05-2013, 09:45 AM
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The calculator on this site will give you timing events in conjunction with the cam specs.
http://cochise.uia.net/pkelley2/DynamicCR.html .
__________________
'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 ) Old information here: http://www.hotrod.com/articles/0712p...tiac-trans-am/ Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine) Best time 5.13 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension https://www.youtube.com/watch?v=qDoJnIP3HgE |
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