SBC Chevy 383 406 Comp Cams 598/583 RETRO Hyd. Roller Cam # 12-000-8-11321
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SBC Comp Cam RETRO STYLE (FLAT NOSE) HYDRAULIC ROLLER 598/583 Lift 253/261 Duration 110 Lobe Sep.
This cam has a flat nose for use in early and some later style non roller blocks. We have this cam available in an oe step nose style also. The part number is 08-433-8.
Reduced base circle cam. (1.050)
See dyno results below
Special Grind # 13459
PART NUMBER: 12-000-8-11321
110 lobe sep.
Comp Cams SBC Xtreme Energy Hydraulic Roller Camshafts.
Carefully read the test description in each of the dyno reports below. This exact cam was chosen in many of our sbc street rod engine builds. These are all pump gas street rod engines with approx. 10.5:1 compression. Most of the 427 and 434 engines are running the 210 or 220 AFR heads on them. Various intakes and rocker ratios were used. The hp numbers produced with our new line of custom ground Comp Cams well exceed most other cams on the market the have nearly identical lift, duration and lobe sep. numbers.
Notice that we have not mentioned engine sizes below the 427 and 434, and for good reason. This cam is not recommended for these smaller engines with pump gas compression. There would be little if any power gain with this cam on a street rod over the next size down cam, but rest assured, one thing you would gain from using this cam in the smaller engines, and that would be very poor street manners, very low vacuum, and excessive valve train wear. You could use this cam in a smaller cubic inch engines with higher compression ratio of around 12:1, give or take, and gain some decent power, providing you had a set of heads with 210cc or larger runners. That kind of setup would be considered a Pro-Street rod.
The 427 and larger c.i.d. engines would not require the higher compression ratio to make this cam a decent choice. If you're building a 427/434 street rod, then this would be the max size you could get by with on pump gas compression ratio. The 427 and 434 engines match up with this cam very nicely, and street manners become much better. 10:5.1 is about all that's needed on these engines. The 427/434 would be considered somewhat radical on the street with this cam with fair drivability, but still much too big for very heavy cars running overdrive trans.
Be careful when selecting a cam. Most people can't get the "bigger is better" mentality out of their head. We have at this moment four of the custom ground Comp reduced base circle cams to offer. We are thinking of adding one or two more to fill in the gaps.
Official dyno results with this cam. More to come.
Below are a couple of our larger sbc engine builds showing great results using this cam. This cam would not be well suited in a 350 or 383 engine in the pump gas compression range, but larger engine builds in the pump gas compression range would work well with this cam.
Very impressive hp and torque numbers in two of our 434 engine builds.
Official Dyno report on our 434 engine with this cam, Super Victor 2 intake, 1.6 rockers, Pro Systems 1000 carburetor (supplied by customer) and an MSD distributor.
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