entropy
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Posts: 8671
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posted February 08, 2004 08:40 AM
better breathing = bigger TB's? or not??
As some of you know, I have a ZX12 all motor 1427, muzzy cams, 14.2:1 CR, stock head, stock TB's.
The next issue I want now to deal with is breathing.
Some pretty good concensus on valves/head:
1. leave the stock sized valves, but
2. have a very careful valve job done, paying attention to shape of the valve face, and the width of the contact between the valve & seat,
3. do careful cleanup on the intake port, nothing extreme, keeping some % (i forget) relationship between valve size and intake port size.
4. clean up the exhaust port (specifics?)
5. match carefully the boots to head.
BUT - TB????
1. I get no concensus on whether BigBlock, NA 12's have gotten extra power out of bigger TB's.
2. how you would need bigger ID stacks if you bore out TB's; seems like you'd want to carry the extra TB ID right up to the airbox??
I understand this type of question is kinda like asking: "what's the best cam setting?", but maybe some folks can spill their guts just a bit?? It would be much appreciated..
Thanks
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