Compression, Not your average Engine |
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Compression, Not your average Engine |
Mblizzard |
Oct 16 2018, 06:44 AM
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#1
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Advanced Member Group: Members Posts: 3,033 Joined: 28-January 13 From: Knoxville Tn Member No.: 15,438 Region Association: South East States |
Ok so as many know, I an building my dream engine. With lots of Type 4 Store goodies including Nickies, 78 mm crank, and 102mm P/Cs, LE-200 heads and a decent cam, I am looking at where I want my compression to be.
With a normal engine and quality components it seems that 8.5 to 9.5 is about the limit before heat and detonation become issues. Don't have any measurements yet but playing around with some calculations and assuming a low deck height because I have a slight dish and or valve pockets in the pistons I could easily get to over 11 to 1. But I am think that might not be a long lasting engine. Looking at going for 10 to 10.5. Thoughts? (IMG:style_emoticons/default/blowup.gif) |
Mark Henry |
Oct 16 2018, 07:32 AM
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#2
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
I have the same engine in my '67 bug, anything higher than 9.5 needs twinplug or race gas.
My bug is my summer DD a set of rear tires last me 3 seasons, just noticed one of my tires is now a slick. (IMG:style_emoticons/default/happy11.gif) 180hp in a 1700lbs car, IIRC I set mine up at 9.2. (IMG:style_emoticons/default/w00t.gif) |
Mblizzard |
Oct 16 2018, 07:54 AM
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#3
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Advanced Member Group: Members Posts: 3,033 Joined: 28-January 13 From: Knoxville Tn Member No.: 15,438 Region Association: South East States |
I have the same engine in my '67 bug, anything higher than 9.5 needs twinplug or race gas. My bug is my summer DD a set of rear tires last me 3 seasons, just noticed one of my tires is now a slick. (IMG:style_emoticons/default/happy11.gif) 180hp in a 1700lbs car, IIRC I set mine up at 9.2. (IMG:style_emoticons/default/w00t.gif) Same LE-200 head? |
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