new cumbo for brother any ideas on power
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From: anderson ,sc
Car: 89 formula/00 z28
Engine: carbed 350/ls1
Transmission: 700r4/ a4
Axle/Gears: 3.23 posi/ 3.73 posi
new cumbo for brother any ideas on power
Its in the works 350 bored 30 over with 10.5 cr, 416 heads, perform rpm intake, 600 holley vac. sec. this cam .454 .454 lift http://www.cranecams.com/?show=brows...52&lvl=2&prt=5 any ideas on what power it will make?
Thread Starter
Senior Member
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Joined: Feb 2007
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From: anderson ,sc
Car: 89 formula/00 z28
Engine: carbed 350/ls1
Transmission: 700r4/ a4
Axle/Gears: 3.23 posi/ 3.73 posi
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From: Calgary, AB, Canada
Car: 1982 Trans-Am
Engine: 355 w/ ported 416s
Transmission: T10, hurst shifter
Axle/Gears: 10 bolt, true-trac, 3.73
Re: new cumbo for brother any ideas on power
Yea. The 216/216 cam isn't very aggressive, especially with 10.5:1 CR, you could go bigger on the cam. I'd double check that CR, it seems rather high.
Did you port the 416s? They really wake up after that.
Did you port the 416s? They really wake up after that.
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Senior Member
iTrader: (2)
Joined: Feb 2007
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From: anderson ,sc
Car: 89 formula/00 z28
Engine: carbed 350/ls1
Transmission: 700r4/ a4
Axle/Gears: 3.23 posi/ 3.73 posi
Re: new cumbo for brother any ideas on power
well 10.45 cr . one more problem it has a stock stall and 700r4 and 2.73 so he wants the power band low in the rpm. so what u think about this set up and it will have ac to?
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how u port them. i have three set
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how u port them. i have three set
Last edited by intex1982; Jul 7, 2007 at 01:25 PM. Reason: Automerged Doublepost
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Joined: Jul 2004
Posts: 10,763
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From: Calgary, AB, Canada
Car: 1982 Trans-Am
Engine: 355 w/ ported 416s
Transmission: T10, hurst shifter
Axle/Gears: 10 bolt, true-trac, 3.73
Re: new cumbo for brother any ideas on power
Pick up a book, read a few threads on here, go to work porting them.
Pick a smaller cam if you want more torque, and don't want to change out the stall speed. I'd say he should up the gear set no matter what though.
Pick a smaller cam if you want more torque, and don't want to change out the stall speed. I'd say he should up the gear set no matter what though.
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From: Orland Park, IL
Car: 1984 Z28
Engine: SLOW carbed ls
Transmission: TH400 with brake, 8" PTC converter
Axle/Gears: moser 9" 4.11
Re: new cumbo for brother any ideas on power
get a stock 4.3L 2wd S10 stall from a 1998 pickup and use that, it'll stall at 2200 or so and help out the combo, though those gears will kill it as well. I'd say 260hp at most out of that combo.
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From: Ontario, Canada
Car: 1988 Firebird S/E
Engine: 406Ci Vortec SBC
Transmission: TH-350/3500stall
Axle/Gears: 7.5" Auburn 4.10 Posi-Traction
Re: new cumbo for brother any ideas on power
http://store.summitracing.com/partde...2&autoview=sku
a better cam with more low end. switch to a 3.73 more fun.
port the 416 heads using 1.94x 1.60" valves. 330 340hp
a better cam with more low end. switch to a 3.73 more fun.
port the 416 heads using 1.94x 1.60" valves. 330 340hp
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