sbc

Old 01-24-2010, 03:22 PM
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bigmack
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hey guys i just was wondering if anyone was racing with a 383 sbc and what you guys was shifting the engine at. i was talking to a friend and he said he was shifting around 7200 and 7300 with his 383 i have never shifted my 383 over 6800. let me know what you guys shift at thanks mack.
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Old 01-24-2010, 03:35 PM
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mopar1968
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Well i run a small block Mopar and i shift it @ 7400 rpm all day long :!: :!:



''JUST MY TWO CENT'S WORTH''
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Old 01-24-2010, 05:32 PM
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bigmack
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can't wait for the track to open and try shifting it at 7200 or ????, car went 11.07 shifting @ 6800 rpm, hope to get it in the 10's this year.
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Old 01-24-2010, 07:12 PM
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johnracer
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What do you have for a cam and heads? That'll determine where you should shift.......
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Old 01-24-2010, 08:00 PM
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bigmack
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the heads are pro actions 235 208 int 160 exh the cam is comp 630-630 solid roller, but i also have a comp 675-645 solid roller which one would you go with. oh yea the trans is p/g 1.76 ford 9" with 4.71 gears 28x10.5x15's m/t slicks. in a 87 camaro around 3200 pounds.
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Old 01-24-2010, 09:34 PM
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zipper06
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@ 3200lbs i'd stay with the cam you have in it .630/.630 for the low end torque.

JMO

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Old 01-26-2010, 06:46 AM
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bigmack
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thanks for the replys guys and good luck this year and be safe.
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Old 01-28-2010, 03:52 PM
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fullspeed383
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hey bigmack how are your 60 foot times with your combo.
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Old 01-28-2010, 04:29 PM
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bigmack
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it's in the low 1.5's hope to get it down in the 1.4's this year
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Old 01-28-2010, 04:54 PM
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fishman1
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Originally Posted by bigmack
the heads are pro actions 235 208 int 160 exh the cam is comp 630-630 solid roller, but i also have a comp 675-645 solid roller which one would you go with. oh yea the trans is p/g 1.76 ford 9" with 4.71 gears 28x10.5x15's m/t slicks. in a 87 camaro around 3200 pounds.
I would guess with 235 heads and if your cam will rev to 7300-7500 rpm, that is were these heads would have to be to take advantage of that big a head........my 383 sbc with afr 210 heads peaked on horse power at 6800 rpm and my camshaft is good to 7400 rpm.........so i shift out of first gear at 6700 rpm with my glide and go through the traps at 7000 rpm.....works for me, but if i have 235 heads i would have to rev it way higher to gain anything
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