429 performance?
Elder User
Joined: Jan 2004
Posts: 648
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I ran a couple of sims with the following baselines
10.0:1 CR
Dual plane intake
750 cfm carb
Headers w/small tube primaries
Moderate head work (port matching and chamber polishing)
Here are the numbers from the cams indicated...
Comp Cams 280H
Torque - 470 @ 4000
Horsepower - 413 @ 5000
Lunati 00096
Torque - 478 @ 3500
Horsepower - 418 @ 5000
Crane Powermax H-288-2
Torque - 468 @ 4000
Horsepower - 414 @ 5000
Edelbrock Performer RPM Hydraulic 7167
Torque - 447 @4500
Horsepower - 419 @ 5500
You could increase those numbers somewhat with a little more attention to head work, but I don't know if the added expense would just be justified. Any of the above combos would certainly be a very nice street mill.
Unless you already have the 429 purchased (and maybe even if you do) you would do your self a favor to go to a 460 block as the extra cubes would give you a nice boost in HP and torque. Since all the combos above made almost 1hp per cu inch, and over 1 lb-ft torque per cubic inch, the added 30 cubes would make a noticeable difference with zero penalty in weight and cost )if you can find a gimme block in good shape). You would be at - or over - 500 lb-ft torque and 450 hp with just the change in displacement.
Brad
10.0:1 CR
Dual plane intake
750 cfm carb
Headers w/small tube primaries
Moderate head work (port matching and chamber polishing)
Here are the numbers from the cams indicated...
Comp Cams 280H
Torque - 470 @ 4000
Horsepower - 413 @ 5000
Lunati 00096
Torque - 478 @ 3500
Horsepower - 418 @ 5000
Crane Powermax H-288-2
Torque - 468 @ 4000
Horsepower - 414 @ 5000
Edelbrock Performer RPM Hydraulic 7167
Torque - 447 @4500
Horsepower - 419 @ 5500
You could increase those numbers somewhat with a little more attention to head work, but I don't know if the added expense would just be justified. Any of the above combos would certainly be a very nice street mill.
Unless you already have the 429 purchased (and maybe even if you do) you would do your self a favor to go to a 460 block as the extra cubes would give you a nice boost in HP and torque. Since all the combos above made almost 1hp per cu inch, and over 1 lb-ft torque per cubic inch, the added 30 cubes would make a noticeable difference with zero penalty in weight and cost )if you can find a gimme block in good shape). You would be at - or over - 500 lb-ft torque and 450 hp with just the change in displacement.
Brad
Last edited by Brad Johnson; Apr 5, 2004 at 02:25 PM.
