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1mm OS or Stock Sized Stainless

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C89ZX7R

10+ Year Contributor
122
23
Feb 24, 2011
Richmond, Virginia
Building the 63 head before the 64 bottom end so I have more time to find a "6 bolt crankshaft", read some "Older" threads saying its not worth it to do 1mm over sized valves. What are your thoughts as black friday sales are coming up ;)
 
400 street car.[DOUBLEPOST=1416970787][/DOUBLEPOST]Plus Im going from the g54b 2.6 sohc to the 64 bottom and 63 head so we are use to upping our valve size ;) to try and make what yall make at stock size apparently
 
If you do go os (though don't think it's necessary) you'll have to de shroud the valves. But doing some minor clean up and polishing the cc and a 3 angle valve job would be all that is needed. Actually for a 400 hp street car there is no need, cams and springs are a good idea. You should do valve seals and lifters while the heads off, clean all oil passages thoroughly and doing bogusvo's oil port mod(s) is a good idea. At least have the springs tested as stock ones might have weakened.
 
was planning on stainless valves, beehives, hla regulator, arp cam tower bolts, 3g or no tick lifters, valve guides and seals. Undecided on which cams right now, thinking 272 kelfords
 
Kelford's are nice, keltalon made some good power (800+) on bc 276 cams. And that's the first time I've heard of anyone using arp cam tower bolts, may I ask the reason why you feel you need them? And what would the benefits of using them be?
 
^that, also thinking arp cam gear bolt ;)

Ferrea SS Reg Sized Valves came in today from the Extreme Psi Black Friday sale 239 bux.
 
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