Bbc 454 build.
#31
JaniH here's two informative threads about what you are planning to do.
First Look at Dyno's 330's on roids!
My 330 on Roids - Final Results
First Look at Dyno's 330's on roids!
My 330 on Roids - Final Results
#32
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iTrader: (3)
Everyone gets their panties in a bunch over the rectangle ports. Ever see the stock mid range torque numbers on a 500efi, or even a 454 Mag MPI? They make more torque than they do horsepower. Lots of it. the big gains when going to a dart, afr, brodix, etc over the gm rectangles, usually doesnt start happening till the higher rpms. At 6000rpm, the aftermarket heads smoke the 088's. At 3000rpm, not all that different.
What made the peanuts work great in a tow engine, was their small valve. Small valve, small port, small cam, minimal low speed intake reversion. Its the size of the valve that dictates the size of the port. You dont put a 2.3 valve in a 230cc port, and you dont put a 2.06 valve in a 345cc port.
if youre looking for big torque numbers off idle and peak at 1800rpm , like in a tow vehicle or rv, the rectangle might not be the best choice. But if youre ok with big torque from 3000-5000rpm, the gm rectangles will get it done. Those peanut heads were designed for a smooth idling 1800rpm peak torque truck engine . I wouldnt waste any money on modifying them, even though the internet will tell tales of some guy claiming he made 600hp and 700ft lbs with some peanuts ..
What made the peanuts work great in a tow engine, was their small valve. Small valve, small port, small cam, minimal low speed intake reversion. Its the size of the valve that dictates the size of the port. You dont put a 2.3 valve in a 230cc port, and you dont put a 2.06 valve in a 345cc port.
if youre looking for big torque numbers off idle and peak at 1800rpm , like in a tow vehicle or rv, the rectangle might not be the best choice. But if youre ok with big torque from 3000-5000rpm, the gm rectangles will get it done. Those peanut heads were designed for a smooth idling 1800rpm peak torque truck engine . I wouldnt waste any money on modifying them, even though the internet will tell tales of some guy claiming he made 600hp and 700ft lbs with some peanuts ..
#34
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Thread Starter
Everyone gets their panties in a bunch over the rectangle ports. Ever see the stock mid range torque numbers on a 500efi, or even a 454 Mag MPI? They make more torque than they do horsepower. Lots of it. the big gains when going to a dart, afr, brodix, etc over the gm rectangles, usually doesnt start happening till the higher rpms. At 6000rpm, the aftermarket heads smoke the 088's. At 3000rpm, not all that different.
What made the peanuts work great in a tow engine, was their small valve. Small valve, small port, small cam, minimal low speed intake reversion. Its the size of the valve that dictates the size of the port. You dont put a 2.3 valve in a 230cc port, and you dont put a 2.06 valve in a 345cc port.
if youre looking for big torque numbers off idle and peak at 1800rpm , like in a tow vehicle or rv, the rectangle might not be the best choice. But if youre ok with big torque from 3000-5000rpm, the gm rectangles will get it done. Those peanut heads were designed for a smooth idling 1800rpm peak torque truck engine . I wouldnt waste any money on modifying them, even though the internet will tell tales of some guy claiming he made 600hp and 700ft lbs with some peanuts ..
What made the peanuts work great in a tow engine, was their small valve. Small valve, small port, small cam, minimal low speed intake reversion. Its the size of the valve that dictates the size of the port. You dont put a 2.3 valve in a 230cc port, and you dont put a 2.06 valve in a 345cc port.
if youre looking for big torque numbers off idle and peak at 1800rpm , like in a tow vehicle or rv, the rectangle might not be the best choice. But if youre ok with big torque from 3000-5000rpm, the gm rectangles will get it done. Those peanut heads were designed for a smooth idling 1800rpm peak torque truck engine . I wouldnt waste any money on modifying them, even though the internet will tell tales of some guy claiming he made 600hp and 700ft lbs with some peanuts ..
#35
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Mike, my junk heads hopefully arrives this week and the project begins. You will see the numbers! Flow numbers first and dyno numbers last 😉
#36
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i had my 330hp 454 built couple years ago and got 430hp at 4700rpm out of it with peanut port heads a small hydraulic roller cam 510 on intake and exhaust with a edlebrock rpm air gap intake and quick fuel 850 carb.the motor was bored .030 over with kb pistons with 9.1 comp.
#37
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What would be the max cam overlap with gill/ssm style manifolds and silent choice.
#39
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