anybody running XR276HR-12 cam and have a 383?
04-10-2007, 09:46 AM
#1
anybody running XR276HR-12 cam and have a 383?
i am curious if anybody else is using this cam and afr195cc heads as to what their dyno is. Mine won't be dyno'ed until later this week and I am curious to see what others have with their combo
04-12-2007, 07:16 AM
#3
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Car: 1984 Trans Am WS6
Engine: Minirammed 385, 396 RWHP
Transmission: T56
Axle/Gears: 3.73 Moser 12-bolt
Re: anybody running XR276HR-12 cam and have a 383?
I've got what is essentially the next size cam, a 230/236 112LSA, and a Miniram intake, but otherwise have pretty much the same shortblock. My dyno runs were 396 RWHP and 383 ft.lb. You should have a higher torque number by 12 to 20 ft.lb, and slightly less horsepower.
04-15-2007, 06:12 PM
#5
Re: anybody running XR276HR-12 cam and have a 383?
sadly i only put down 310 rwhp to the wheels....at 5000 rpms bc i didnt upgrade the fuel pump or injectors 
but my torque is 350 ft/lbs and is a nasty lil torque curve.....motor has 500 miles on it hehehe
but my torque is 350 ft/lbs and is a nasty lil torque curve.....motor has 500 miles on it hehehe
04-15-2007, 10:05 PM
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Re: anybody running XR276HR-12 cam and have a 383?
04-16-2007, 12:58 PM
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Car: 1984 Trans Am WS6
Engine: Minirammed 385, 396 RWHP
Transmission: T56
Axle/Gears: 3.73 Moser 12-bolt
Re: anybody running XR276HR-12 cam and have a 383?
Did you log fuel pressure and air/fuel ratio? Did it lean out on the top-end? You shouldn't have run out of cam for another 800 RPM or so.
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08-27-2007, 08:57 PM
#11
Re: anybody running XR276HR-12 cam and have a 383?
Jvette, did you finally get that thing dyno tuned all the way?
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thats ab the same numbers i got with a slipping tranny and non lockup converter
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thats ab the same numbers i got with a slipping tranny and non lockup converter
Last edited by 89formula350b2l; 08-27-2007 at 08:57 PM. Reason: Automerged Doublepost
08-28-2007, 04:34 PM
#12
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Car: 89 vette
Engine: L98
Transmission: a4
Re: anybody running XR276HR-12 cam and have a 383?
Not yet. It's my daily driver so no rush. I will tune it at the track when it cools down!
John
John
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