496, AFR290, Straub cam - Page 3 - Chevelle Tech
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post #31 of 40 (permalink) Old Aug 27th, 19, 4:08 PM
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kevin
 
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Re: 496, AFR290, Straub cam

run a somewhat similar 496 combo with a solid ft comp xs-290-s cam (lot more tame than your spec). edelbrock ovals. a tick less compression than yours. got 625 ft/lb at 4500 610 hp at 6100. I think you are knocking on a strong 650+ hp. should be a tire killer... say this again - the 496 is a GREAT bbc combo...
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post #32 of 40 (permalink) Old Aug 27th, 19, 7:30 PM
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Re: 496, AFR290, Straub cam

Quote:
Originally Posted by Wolfplace View Post
The Mahle stuff is pretty reasonable, it is an inboard pin design
Last one I did with a 4.500 Mahle & this rod......
PIN=148, RAIL=7.8, PIST=537, RINGS=39.3, LKS=2.3
ROD UP=223.6, LOWER=542.6
Total BW for this one was 2139.9
That's a long way from the old TRW pistons and GM 7/16 rods. Most of the bobweights I remember from 30 years ago were in the 2300 range. I have not used the Mahle pistons, will be looking at them in the future if my son needs a bracket engine rebuild.

Thanks
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post #33 of 40 (permalink) Old Jan 25th, 20, 11:40 PM
 
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Did we ever find out what hp it made on the dyno?
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post #34 of 40 (permalink) Old Jan 26th, 20, 3:15 AM
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Dan
 
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Re: 496, AFR290, Straub cam

Not in this thread but I'd enjoy the results as would others I think. I have a somewhat similar abomination running now. Sounds like a Prius compared to my 565.
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'66 SS Chevelle

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performance to be determined.
91 octane special.
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post #35 of 40 (permalink) Old Jan 26th, 20, 12:47 PM
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Steve
 
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Re: 496, AFR290, Straub cam

Like to hear as well.

64 Chevelle 496
64 F100 Street Rod with BBC /Chevy trapped in a ford body
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post #36 of 40 (permalink) Old Jan 26th, 20, 10:18 PM
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Quote:
Originally Posted by Merchantsailor View Post
Did we ever find out what hp it made on the dyno?
This build did not happen, maybe in a couple years?

The bottom end will receive ported 049s, and most likely an Isky 275/284 cam, a C-427X Edelbrock intake, 750 vac secondary, and then it will find a home in my ‘70 MC. Holing for about 540 hp and 580 ft*lbs, something with enough grunt to pull 2.56 gears and stock stall at 4050 lbs. The car is a retro, sleeper hotrod.
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1981 Malibu wagon
406/350/4.10
Best ET NA 12.20 @ 110
Best ET w/N2O 11.47 @ 117
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post #37 of 40 (permalink) Old Jan 26th, 20, 10:27 PM
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Re: 496, AFR290, Straub cam

Darn what happened? it looked really close to being finished and looking really good
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post #38 of 40 (permalink) Old Jan 26th, 20, 10:39 PM
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Quote:
Originally Posted by shovelrick View Post
Darn what happened? it looked really close to being finished and looking really good
What it amounts to was prioritizing my efforts, the AFR-solid roller cam combination was going to be too much bullet for the chosen car. I’m looking for just enough, not overkill to work with the MC. I’m looking for smoother idle and happy highway cruising, hop in it and drive it reliability.

The AFR-SR cam build will get a forged crank, 3500 stall, and 4.10 gears and sit in my Malibu wagon. This one should be even more interesting!
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1981 Malibu wagon
406/350/4.10
Best ET NA 12.20 @ 110
Best ET w/N2O 11.47 @ 117
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post #39 of 40 (permalink) Old Jan 27th, 20, 2:16 AM
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Re: 496, AFR290, Straub cam

Quote:
Originally Posted by dragginwagon406 View Post
This build did not happen, maybe in a couple years?

The bottom end will receive ported 049s, and most likely an Isky 275/284 cam, a C-427X Edelbrock intake, 750 vac secondary, and then it will find a home in my 70 MC. Holing for about 540 hp and 580 ft*lbs, something with enough grunt to pull 2.56 gears and stock stall at 4050 lbs. The car is a retro, sleeper hotrod.
C427X is going to kill too much low end torque with that divider cut out of it as they came that way from Edelbrock. That's what the X was for no divider, C427 is better as it has the divider in it. I would either look for a C-396 or an RPM Performer before I ran that great big intake on ovals with the 2.56 gears.


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post #40 of 40 (permalink) Old Jan 27th, 20, 10:14 AM
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Re: 496, AFR290, Straub cam

I understand what you mean as far as drive ability, I put kind of a smallish hyd roller cam in my 489 so I can run a/c, gets hot down here
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