I am building one of Jake's 2270s. As you know he is off on a well deserved holiday. Unfortunately I figured out my deck height one day too late! Here is what I have: 58 cc chambers, flat pistons and 0.80 (2 mm) deck height. This gives me a compression ratio of 8.9:1.
What should I be aming for with a street engine on pump gas? More like 9.2:1 ish?
Deck Height and compression ratio
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Dean
- Posts: 90
- Joined: Tue Dec 02, 2003 7:21 am
Hi John,
Sorry I can't help you with your question on what the compression ratio should be but I do have a question for you. Do the heads you got have a step in them and was the cc's written on the head include that step? I was looking at the Hotvw article on the torquer and it seems that the step is not included in the cc measurement. I'm going to try and cc the heads this weekend to find out but I don't have a bore plate that will fit so it's not going to be very accurate.
Sorry I can't help you with your question on what the compression ratio should be but I do have a question for you. Do the heads you got have a step in them and was the cc's written on the head include that step? I was looking at the Hotvw article on the torquer and it seems that the step is not included in the cc measurement. I'm going to try and cc the heads this weekend to find out but I don't have a bore plate that will fit so it's not going to be very accurate.
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JohnBC
- Posts: 35
- Joined: Tue Apr 12, 2005 6:45 pm
Did a bit more digging and found Jake's recommenmdation was 0.055" which works out to about 9.3:1. I was able to work the shims I had to hit 0.050", about 9.4:1 which should be ducky.
My heads are from Len and the combustion chamber volume was stamped on the back. No step but they are not VW castings.
My heads are from Len and the combustion chamber volume was stamped on the back. No step but they are not VW castings.