Quote:
Originally Posted by Sieg
The cam is a hydraulic unkown, no ID on the front end, Comp Magnum roller tip 1.52 rockers. One knoweldgable long-time builder said it sounded and felt similar to the GM "Duntov" pattern and they (GM) made a similar patterned cam in a hydraulic version. It likes(d) to idle around 950-1000, best obtainable vacuum at idle is 10.5-11". It likes to start pulling at 2,500-2,800 starts pulling good around 3500-3800 and at 5500 it feels like the intake impedes progress. 
AFR's are older 190's w/ 2.00 int. Not sure on the exact cc's as they appear to be 72's that have been surfaced.
Lot's of unknowns but not for long.
Good news is State Farm is covering it, now I need to clarifiy the rules of the game. The agent is a long-time local and friend which should help.  |
AFR heads typically flow better out of the box then any other head. Not sure which ones you are using but with a 2.00 intake valve I would stick with 650. If you are currently running flat top pistons the 72 cc chamber size is going to drop your compression. Typically with flat top pistons and 64 cc combustion chambers you will get about 10.5:1 compression. If you are going to use those heads it's time for some pop ups.
I dont know what heads were on it before but it is possible they could have impeded your rpm range. I know typically advertised range for a cam that starts pulling at 2500 should take you to 6500 but without specifics on the cam its a tough call. If it were me I'd buy another cam just so I knew what I had.