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#21
02-20-2005, 09:51 PM
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Bill, a little bit about my car. 67 Firebird, bought it a couple years ago. The following is what I was told about the drivetrain.
455 bored 30 over (1970 motor) 1971 96 heads RA lV 041 cam hyd lifters crane roller rockers Race built B&M TH350 3.73 posi Demon 850 carb Tuned HEI (mechanical advance) with MSD 6A Headers and 2 and 1/2 inch dual exhaust Had the car out for a while a few days ago. It seemed a little sluggish and at around 4400 rpm it really acted up...like valve float. I checked a number of things and found them to be ok. Took valve cover off passenger side.......observed rocker motion while cranking engine. Most rockers appeared to have normal movement. A couple moved only a quarter inch or so. I am thinking I have a flat cam. If that is the case and all the above info checks out what would be a good cam choice? I race very little but love that torque in the 2000 to 4500 range and enjoy an idling engine that sounds and lopes like it has a cam in it. Thanks, Del |
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#22
02-20-2005, 10:08 PM
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Del, Since I am so far away, and can't diagnose the engine myself, I would suggest that you call, or go see Jim Butler. He is a true Pontiac guy and he knows his stuff. Give him all your specs and take his recommendation. I've ordered parts from him, and he is on the ball!
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Bill 64 GTO, tube chassis w/606" IA tall deck, PG & a pro geared Fab 9". 2750 lbs. 8.2550@164.17-1/4, 5.2901@131.97-1/8, 1.1981-60-ft. 8/10/08 
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#23
02-20-2005, 11:05 PM
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Thank you Bill, I will attempt to contact Jim Butler later today. Del
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#24
02-21-2005, 04:42 PM
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I think i have the heads narrowed down to #66 or #98. Now.....is there any way to identify which one without removing head? Del
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#25
02-21-2005, 07:19 PM
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No.
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Bill 64 GTO, tube chassis w/606" IA tall deck, PG & a pro geared Fab 9". 2750 lbs. 8.2550@164.17-1/4, 5.2901@131.97-1/8, 1.1981-60-ft. 8/10/08
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#26
02-21-2005, 08:23 PM
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Thanks for the good news Bill.....oh...bye the way.....weekend after next Centerville Arkansas and Rogersville Mo Dragstrips Open the season!!
It's time for a new cam anyway. Was hoping I could determine what cam I wanted, get it on the way and save a few days. I did contact Butler today by email. They narrowed the heads to #66 or #98. Del |
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