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180 dynamic CR
Posted by: JerryM ()
Date: November 18, 2022 06:51AM

What's the cold cranking dynamic CR on a stock 180?

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Re: 180 dynamic CR
Posted by: 63turbo ()
Date: November 18, 2022 07:00AM

If you know the cam specs, try plugging those into this:[www.wallaceracing.com]

I did this at one point on an early turbo and came up with 7.5:1 or less.
my cold cranking compression is usually around 125 psi with 8.0:1 static compression ratio.

------------------------------------

Kevin Nash
Friday Harbor Washington
63 Spyder, Daily driver, EFI read about my project here: [corvaircenter.com]
first test start on EFI here:[www.youtube.com]
first official EFI boost test here:[www.youtube.com]
My new fan! [corvaircenter.com]
engine less 62 Spyder
Canadian 64 Monza Parts car
Test Start#2 [www.youtube.com]



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Re: 180 dynamic CR
Posted by: 63turbo ()
Date: November 18, 2022 07:16AM

I played around with the calculator and plugged in various cam closing angles until I got my measured cold cranking pressure and came up with 6.68:1 dynamic

------------------------------------

Kevin Nash
Friday Harbor Washington
63 Spyder, Daily driver, EFI read about my project here: [corvaircenter.com]
first test start on EFI here:[www.youtube.com]
first official EFI boost test here:[www.youtube.com]
My new fan! [corvaircenter.com]
engine less 62 Spyder
Canadian 64 Monza Parts car
Test Start#2 [www.youtube.com]



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Re: 180 dynamic CR
Posted by: dryenko ()
Date: November 18, 2022 10:05AM

I found this explanation useful
[www.enginebasics.com]

Bob C aka Dryenko
Dobson, NC 27017

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Re: 180 dynamic CR
Posted by: pvholgado ()
Date: November 20, 2022 07:35AM

Thanks Bob... good read.

"A sign of great intelligence is being able to say 'I don't know'"
1966 Corsa Turbo Coupe
Located 25 miles East of Rochester, NY

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