Re: 572 all aluminum headed to dyno
[Re: rb446]
#3011998
02/03/22 07:40 PM
02/03/22 07:40 PM
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Posts: 14,531 So. Burlington, Vt.
fast68plymouth
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The ends of the heads are machined flat. The EZ heads are done that way.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: 572 all aluminum headed to dyno
[Re: fast68plymouth]
#3012052
02/03/22 11:44 PM
02/03/22 11:44 PM
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Posts: 31,199 Oregon
AndyF
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The ends of the heads are machined flat. The EZ heads are done that way. Correct, Big EZ heads, 325 cc. Compression is 14.5, cam is 280/296 at 050. We'll run it with 2 inch dyno headers. Throttle body is a Holley 2000 cfm with a 4500 bolt pattern. Intake is a Super Victor fully ported by Wilson. T&D rocker arms, Callies crank, Callies rods, Jesel belt drive.
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Re: 572 all aluminum headed to dyno
[Re: AndyF]
#3012080
02/04/22 06:52 AM
02/04/22 06:52 AM
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440Jim
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Correct, Big EZ heads, 325 cc. Compression is 14.5, cam is 280/296 at 050. We'll run it with 2 inch dyno headers. Throttle body is a Holley 2000 cfm with a 4500 bolt pattern. Intake is a Super Victor fully ported by Wilson. T&D rocker arms, Callies crank, Callies rods, Jesel belt drive. Sounds like a powerful combo. I would love to see back to back numbers with larger headers more suited to 572 CID. How long are the dyno headers? Is it too early for me to guess 920 HP? But the small headers may reduce peak HP. From Indy web site for the Big EZ: CNC porting 325cc runners, 370 CFM at 0.700"
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Re: 572 all aluminum headed to dyno
[Re: AndyF]
#3012134
02/04/22 12:35 PM
02/04/22 12:35 PM
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Joined: Jan 2003
Posts: 14,531 So. Burlington, Vt.
fast68plymouth
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It’ll be interesting to see how that cam works at the top end of the curve.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: 572 all aluminum headed to dyno
[Re: fast68plymouth]
#3012164
02/04/22 02:11 PM
02/04/22 02:11 PM
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Posts: 31,199 Oregon
AndyF
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It’ll be interesting to see how that cam works at the top end of the curve. Yeah I have no idea. 16 degrees of split is outside of my working knowledge. I ran a 280/286 in my 514 as well as a 282/288. Both of those cams worked pretty well in that engine. This is a small exhaust port so the extra duration might be what it needs. I might have been leaving power on the table with one six degrees of split. We should have numbers in a week so we'll see what they show.
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Re: 572 all aluminum headed to dyno
[Re: fast68plymouth]
#3012172
02/04/22 02:26 PM
02/04/22 02:26 PM
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440Jim
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It’ll be interesting to see how that cam works at the top end of the curve. Do you expect the large duration split to improve or reduce top RPM power? I do wonder if the "small" 2-inch dyno headers (which may be longer than 30"?) will reduce the top RPM power.
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Re: 572 all aluminum headed to dyno
[Re: 440Jim]
#3012191
02/04/22 03:55 PM
02/04/22 03:55 PM
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Joined: Jan 2003
Posts: 14,531 So. Burlington, Vt.
fast68plymouth
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It’ll be interesting to see how that cam works at the top end of the curve. Do you expect the large duration split to improve or reduce top RPM power? I do wonder if the "small" 2-inch dyno headers (which may be longer than 30"?) will reduce the top RPM power. I don’t know that I have an “expectation” on what it will do. This motor has slightly bigger heads than a 580 we had on the dyno a couple years ago. It also should have better oil/windage control, a better intake manifold, and more throttle body capacity. The one here had a couple more degrees of intake duration, but less split. It didn’t make anywhere near 900hp, but we weren’t expecting it to either. Peaked at 64-6600, and didn’t really drop off till 7k(down 20hp). I’m interested to see where the TQ peak occurs, and then how flat the HP curve is at the top end of the pull. Basically....... can the big split help cover up for the smallish intake/exhaust ports for that displacement? If it had “big” heads, I’m sure that trend of the extended top end would be there....... but not sure what to expect with the smaller heads. When the induction isn’t the cork in terms of where the peaks should occur, the big split can really help move the peaks nicely up in the rpm band.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: 572 all aluminum headed to dyno
[Re: DoubleD]
#3012279
02/04/22 09:22 PM
02/04/22 09:22 PM
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Joined: Aug 2003
Posts: 43,715 Bend,OR USA
Cab_Burge
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Are you going to run a vacuum pump ?? It has a dry sump oil system now
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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