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Old 05-11-2006, 11:35 PM
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Guesstimate

My combo: SBC 406, AFR 195s, RPM manifold, Barry Grant SD 650 VS, 9:6.1 comp. ratio, 280HR cam (280/280, 224/224@.050 .563/.563 w/1.6 rr), 1 5/8 long tubes. What kind of number should i expect. Thanks

How any of you guys seen the numbers on the new eliminator 23* sbc heads from AFR. Simply amazing!

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Old 05-12-2006, 07:43 AM
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Your motor looks good, but I would consider a larger cam depending on what it is going to be used for. Those heads react very well to larger cams. I had an xe268h (224 230 @.050 .488 lift) in a 355 and it was easily mild enough to be driven every day, and it was my daily driver. Your cam will be a little more radical than that because it has a little more lift, and it is a single pattern, but the 400 will eat up alot of cam compared to a 355. What I mean is that what acts like a big cam in a 355 may be relatively mild in a 406. I would consider the 286HR (230 230 @.050 .560 .560 lift) assuming you are after a little more hp, and this is not a tow truck motor or something like that. Also, what stall are you going to be running? With the larger cam, a 2500 should be plenty. Assuming you stick with the smaller cam, I would estimate your output at around 450-460 hp. If you went with the larger cam, I would think you would be closer to 480-500 hp.

And I did hear about those new heads. It used to be that AFR was the best bargain, but not the absolute best performing head out there. With the 227 flowing 325 cfm, it may be that now, they are the best bargain, and on par with the best performing 23 degree heads that you can get your hands on in a similar size.

Adam
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Old 05-12-2006, 11:29 AM
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I just put my first engine together this year. SBC 400 .030 over runs 9.6 comp ratio using stock 1.94 heads and 1.5 rr with edelbrocks power package cam is .214 .214 @ .050. Put it on the dyno and got 370 ftlbs torque at the flywheel @ 3200 rpm. Do the math and the is only like 225 hp. now you may see more than that but not sure your going to see more than 320 hp and that would be @ like 4500 rpm.
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Old 05-12-2006, 11:39 AM
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easily 475/475 Maybe more... You could definitely use some more compression though- that would help a lot. I don't see much of a reason to go with a bigger cam- though that's because I like stoplight races and the more low end torque the better.
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Old 05-12-2006, 01:58 PM
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Quote:
Originally Posted by hadsone
using stock 1.94 heads and 1.5 rr

There is an ENORMOUS difference in the flow potential ( and therfore hp potential) between your stock heads and the AFR 195's. Those heads you used have crap flow across the lift range, especially compared to the AFR's. Better heads, more cam = more hp!
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Old 05-12-2006, 02:51 PM
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It's going to be a daily driver and 100% street. I plan on using a 2500 stall with a built 700r4 trans and a 3.42 gear.
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Old 05-12-2006, 03:56 PM
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Without looking at the other replys, I guessed it at around 470 horses. If its a daily driver stick with your cam now so its not so radical. Hg
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