Compression chamber volumes: 1100, 1300, 1500

Compression chamber volumes: 1100, 1300, 1500

Eric Hamilton (Durham NC)
Eric Hamilton (Durham NC)

June 15th, 2008, 11:48 pm #1

Two questions, one looking for data and the other for experience:

First, what are the compression chamber volumes for a stock unshaved 1100 (old 128), 1300, and 1500 head?

And second, Matt and many others have said that a 1300 head on a 1500 block will usefully nudge up the compression. Would the same trick work with an 1100 head on a 1300 block?

Joined: October 3rd, 2004, 5:56 pm

June 16th, 2008, 1:16 am #2

Here's some good data on 1300 and 1500 heads:

Can't help you with the 1100 head, but one thing to look out for is the size of the ports and valves on the heads. Might get more compression but restrict top end flow.

Joined: December 21st, 2004, 3:04 am

June 16th, 2008, 8:01 am #3

.. and I have no way of knowing... I think this should be kept up in Best Of for future reference.

Perhaps others will chime in... but the author appears to really know his stuff!

My best,

Black Tooth and me... since 1983!
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