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hotrod 80 · 08-23-2017, 10:35 PM

Just to put things in prespective . My 750 on 388 ci sbc is 13 at idle and all in at 33 at 2600 . It is jetted 69Front 69 rear no power valve. The 4.8 is like 284ci I always aim for 12.5 to 12.8 WOT.

08-23-2017, 10:35 PM	#17
hotrod 80 mini truck racer Join Date: Aug 2006 Location: Baytown , texas Posts: 3,010	Re: 4.8 carb tuning help Just to put things in prespective . My 750 on 388 ci sbc is 13 at idle and all in at 33 at 2600 . It is jetted 69Front 69 rear no power valve. The 4.8 is like 284ci I always aim for 12.5 to 12.8 WOT. __________________ 1949 5-window 1969 Camaro 1976 Chevy Luv yellow 1978 Chevy Luv Blue 1976 Chevy Luv Black 1979 Firebird Flooded in Harvey 1999 F350 Dually 2005 GMC Sierra 4.8 RCSB 2014 Explorer (wifes) My build :http://67-72chevytrucks.com/vboard/s...d.php?t=399148 Build #2: http://67-72chevytrucks.com/vboard/s...d.php?t=653583