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Original Message
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| RE: extreme cams |
| By Scott A. Ekleberry - 09/01/2004 12:01:52 PM; IP 24.209.97.157 |
I have the Comp Cams 280H in my 390 Mach 1. Sounds like your setup is much like mine only I have C6AE-R heads with stock adjustble rockers and 428CJ valves. I like the cam even though we are still tuning the carb. It seems to pull hard all the way up the RPM range, plants you in the seat from the start and doesn't seem to fall-off at all in gear changes. The vacuum is not the best however, only 6" in drive at an idle, so bad that when I tromped the pedal the vacuum got so low my blower in the car would switch to the defroster LOL. We fixed that with a check valve. I would say if you go to any bigger hyd. cam you are going to have trouble with the trans. and power brakes if you have them. Like the other guys say, if you want it bigger get a solid lift cam. I don't know what the 282S will get you over the 280H, when you factor in the lash the lift #'s would be about the same I would think, the 292S is definetly going to be much more powerful but then you would need to change your stall converter.
Without knowing where you have your timing set, etc. I can't say what is going on, but my car sounds bad, everyone who hears it says it sounds good. I have the timing at 14 degrees initial and 36 degrees total advance. I'm also running MAC 2-chamber stainless mufflers with a healthy exhaust system, you can hear it coming 2 blocks away when I get on it (just as a side note here, the muffler shops drawings of stock 390/428 exhaust shows glass-pack mufflers!). I haven't run the car on the drag strip as of yet (it is mainly a cruise-in car) but just by previous experience and the way the car runs I would say it's in the 13.50-13.90 or so range (well over 100 MPH in quarter mile). I don't know what kind of performance you are looking for but that isn't too bad for a street car I would say. The 280H is the cam Comp recommended for my car, maybe call them with your specs and see what they say? It is up to you in the end what you want, at some point streetability has to be sacrificed for more performance.
Scott |
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