Quote:
Originally Posted by ta man
It may be possible..but I'm pretty sure Dave has done enough dyno testing.I trust his judgement when he is the one porting and setting up the heads and supplying the cam.
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Do you know what springs he's using? Mine have a polished, smaller diameter spring than the 99893's that have similar tension but are much lighter in weight.
Dave said he's had excellent results so far. I only have 4 dyno pulls on mine but there was no sign of valve float.
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68 GTO,3860#
Stock Original 400/M-20 Muncie,3.55’s
13.86 @ 100
Old combo:
462 10.75 CR,,SD 330CFM Round Port E's,Old Faithful cam,Jim Hand Continental,3.42's.
1968 Pontiac GTO : 11.114 @ 120.130 MPH
New combo:
517 MR-1,10.8 CR,SD 350CFM E's,QFT 950/Northwind,246/252 HR,9.5” 4000 stall,3.42's
636HP/654TQ
1.452 10.603 @ 125.09
http://www.dragtimes.com/Pontiac-GTO...lip-31594.html