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Old 02-01-2016, 02:37 PM
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Originally Posted by 27 MAGNUM
Yes, bigger cubes are not an option rt. now. but I am going to AFR Alum. Heads from Dart Iron 202/160 - I didn't think that cam was so big, it doesn't sound that big and I don't have any idle issues.
I wouldnt expect a whole lot of performance gains going from the darts to the afr heads.
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Old 02-01-2016, 03:09 PM
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depends on what kind of Darts...so...what kind are they ?

Back to cams, what is your rpm at top speed ? And what is your compression ?
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Old 02-01-2016, 03:16 PM
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Originally Posted by 27 MAGNUM
I have GLM exhaust, BUT I had them extended where the water enters the exhaust evack 15 inches from the center of the Manifold/Block to eliminate reversion. I am currently running 350 sm blocks with a Comp Cam of 236 intake and 242 Exhaust at .050 Lobe Separation is 112 - I would like to step it up! Any help on Cam Selection would be Great.....
How much lift? Two years ago I built a 355" with Edelbrock E-Tec 200 heads and a hydraulic roller 230/238 on a 112 with .530 lift. If memory serves me I was either 11 or 12:1 compression. I ran Stainless Marine Exhaust. It made 425hp fully dressed with Stainless Marine exhaust on the dyno.

I went from turning 4800 rpm with the original 350 MPI to 5800 rpm with my new 355 MPI. If you want any info on the combo I'd be happy to dig it back up for you.
https://youtu.be/Pykm0boxvdE
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Old 02-01-2016, 03:44 PM
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PAnther - I remember commenting on your cam being a little too big back then, but I'm sure I didn't know you where running that much compression. WOW !
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Old 02-01-2016, 07:26 PM
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Originally Posted by 27 MAGNUM
I have GLM exhaust, BUT I had them extended where the water enters the exhaust evack 15 inches from the center of the Manifold/Block to eliminate reversion. I am currently running 350 sm blocks with a Comp Cam of 236 intake and 242 Exhaust at .050 Lobe Separation is 112 - I would like to step it up! Any help on Cam Selection would be Great.....
How much compression?

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Old 02-02-2016, 02:30 PM
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Originally Posted by SB
PAnther - I remember commenting on your cam being a little too big back then, but I'm sure I didn't know you where running that much compression. WOW !
That's what I remember because I think the stock CR is like 9.5:1. Add the extra cubes from the overbore and the flat top piston and I was somewhere around there with 64cc chambers. I could be off a little, I'm just going by memory.

I was afraid the cam was a little big and I thought the E-tec 200 heads were going to be a little big when I was building it but it all worked pretty well.
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Old 02-05-2016, 12:38 PM
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My Compression is 9.5:1 now and prop for a max RPM of 5800 - My existing Heads are Dart Sportsman II 202/160 ported and polished. I want to up my Compression by a point to 10.5:1 with the AFR Alum. Heads. My Rocker Ratio is 1.5 and again my existing Hyd Flat Tap Cam is 236 intake and 242 exhaust at .050 and the Lobe Separation is 112 - I think I can step it up a notch and I am reaching out for Selection Help. I don't get to a computer daily so please bare with me....
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Old 02-05-2016, 02:50 PM
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that is to much compression on pump gas
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Old 02-06-2016, 08:31 AM
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Originally Posted by 27 MAGNUM
My Compression is 9.5:1 now and prop for a max RPM of 5800 - My existing Heads are Dart Sportsman II 202/160 ported and polished. I want to up my Compression by a point to 10.5:1 with the AFR Alum. Heads. My Rocker Ratio is 1.5 and again my existing Hyd Flat Tap Cam is 236 intake and 242 exhaust at .050 and the Lobe Separation is 112 - I think I can step it up a notch and I am reaching out for Selection Help. I don't get to a computer daily so please bare with me....
10.5 will be fine on a SBC but you'll just have to run 93. I would change to a hydraulic roller. The compression will make better use of all that duration.
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