Tech Team
Bob
Join Date: Jul 2010
Location: Lake St Louis, Mo
Posts: 588
Re: 496 help
I built a 489, scat 9000 kit external balance, 12cc icon pistons, afr265 heads with cnc 112 cc chambers that made 583 hp @ 5900 RPM with team g intake and 1050 4150 cfm carb. the block wasn't decked at that time so under 10.1 compression and a .612" lift hyd roller cam 250s at .050.
I added 1 pt of compression, bored an other .030 to make a 496, ported afr265s and intake, added some lift to .650 still hyd roller in the mid 250s and made 680 hp at 6000 rpm.
I now have AFR315 with upper 250s @ .050 hyd roller, .660 lift on intake. never dynoed this combo. I lost .7 to 1 compression from 11.0 to 10.3 with the change. car has been 10.40s with the exhaust and 10.0s with open headers @ 3500 lbs and near sea level air density.
Bob
1972 Nova
496 AFR315
Straub Custom HR 258/260 108 lsa
MT 255x60x15 drag radials, 1050 CFM 4150 QF/Demon
1/4 10.067 **NEW** 10/24/2018
1/4 133.62 MPH **NEW** 10/24/2018
60' 1.446 **NEW** 10/24/2018
Best 1/8 - 6.404 **NEW** 10/24/2018
Best 1/8 mph 107.75 **NEW** 10/24/2018
Dragweek 2015,2017,2018 SME
2016,2017 RMRW 11.0 index