[6pack] Timing and compression

[michael lunsford]

Al,
 
I found the Goodparts G-2 cam to be a little more radical than I expected.  It works fine but it is lumpier than expected at idle. Most people who hear it at idle and know about these things ask if I "have a cam" in the car so it is noticeable.  I think I have between 9.5 and 10.0 to 1 compression ratio on my car and have to use premium. If I get a dose of bad gas I can tell it from the pinging under light load.  I took a lot, I'm not sure but I think it may have been as much as .025 (1/4 inch) off of the late model head I purchased for the experiment.  From the responses you got to your question I ported, and deburred the head, intake and exhaust and the car runs great, especially with Rick Patton's TBI setup.  
 
Mike Lunsford, 1970 TR6