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#1
02-10-2020, 05:37 PM
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1016 dia
The opening is not exactly round. Is there a "in the middle" number used when figuring it out for compression ratio calculators ? What is crushed thickness ?
Also, how much needs milled off a set of 80cc High Ports to get 5cc removed ? Thanks for any help. |
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#2
02-10-2020, 05:38 PM
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1016 compressed thickness .039 and measures 9.4 cc.
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#5
02-11-2020, 03:07 AM
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Quote:
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Stan
__________________
Stan Weiss/World Wide Enterprises Offering Performance Software Since 1987 http://www.magneticlynx.com/carfor/carfor.htm David Vizard & Stan Weiss' IOP / Flow / Induction Optimization - Cam Selection Software http://www.magneticlynx.com/DV Download FREE 14 Trial IOP / Flow Software http://www.magneticlynx.com/DV/Flow_..._Day_Trial.php Pontiac Pump Gas List http://www.magneticlynx.com/carfor/pont_gas.htm Using PMD Block and Heads List http://www.magneticlynx.com/carfor/pont_pmd.htm |
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#6
02-11-2020, 07:30 AM
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Why do you need a "better number " if the 1016 spec's clearly state 9.4 CCs at the crush height number?
If I am not mistaken that gasket at its widest point is 4.230", I can check for you later when I get home if no one chimes in first. If the info in post 3 is correct then each .005" milled off will knock 1 CC off the chamber volume, which sounds right from what I recall without having my note's at hand.
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! Last edited by steve25; 02-11-2020 at 07:36 AM. |
| The Following User Says Thank You to steve25 For This Useful Post: | ||
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#7
02-11-2020, 08:43 AM
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#8
02-11-2020, 04:52 PM
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#9
02-11-2020, 05:29 PM
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Gasket volume formula is (bore ÷ 2)2 x 3.1416 x gasket thickness x 16.387
https://www.jepistons.com/blog/how-t...d-displacement .
__________________
'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) 5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension https://www.youtube.com/watch?v=qDoJnIP3HgE |
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#10
02-11-2020, 05:39 PM
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GT. |
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#11
02-11-2020, 05:57 PM
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#13
02-11-2020, 06:03 PM
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You need deck height and valve relief cc also, i like the classical pontiac calculator personally
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Illinois Outlaw Gassers 6.27@107 9.97@131 |
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#14
02-11-2020, 06:21 PM
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How To Calculate Engine Compression Ratio And Displacement
https://www.jepistons.com/blog/how-t...d-displacement .
__________________
'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) 5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension https://www.youtube.com/watch?v=qDoJnIP3HgE |
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#15
02-12-2020, 07:19 AM
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The Wallace site formula as many others do assumes a round Bore head gasket, and both the 1016 and the 8518 are not, which makes there CC volume bigger.
Both of these gaskets have two scallops in each Bore for use with the pre mid 1967 valve inclination angle of the 326, 389 and 421 motors. I checked a used 8518 head gasket last night and it's 4.380" at its widest rounded points across its center' so my 4.230" number I posted yesterday seems to be wrong, atleast until I dig out my 1016 gasket to check later.
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#17
02-12-2020, 08:59 AM
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#18
02-12-2020, 12:03 PM
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I have my own calculator in excel if anyone wants it, PM your email.
__________________
1967 Firechicken, 499", Edl heads, 262/266@0.050" duration and 0.627"/0.643 lift SR cam, 3.90 gear, 28" tire, 3550#. 10.01@134.3 mph with a 1.45 60'. Still WAY under the rollbar rule. |
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#20
02-12-2020, 06:31 PM
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When I try and play nice you knobs want to start something. You know, A wise man around here said "why would you take advice from someone who keeps blowing their $h!t up". I stopped taking your advice a long time ago. |
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