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Kirkham Motorsports

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Old 03-10-2010, 07:20 AM
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That sure didn't sound like a "smog cam" to me!!

I'm running a similar engine; CSX #197 482ci with 10.8:1 cr and using an Edelbrock Performer #7106 hyd cam.
Duration @ .050 = 236/236
Lift @ valve = .572
LSA = 108 deg

It's been a very streetable cam with good power from 1,500-6,500 rpm, so they advertise. It does like the 100 octane gas though.

Here it is:
http://edelbrock.com/automotive_new/..._ford_bb.shtml
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Old 03-10-2010, 07:32 AM
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Cool, 2 questions for you. When you say 'csx197' is that a block serial number? Ours is stamped 228. Does Shelby track all the blocks they sell?

Any power numbers on your combo? That's in the ballpark for what I'm looking for.

I use a Comp cams software package that's kind of a desktop dyno. With the 284 cam they estimate 530hp @5500 and 550 tq @ 4000 rpm. The 312 actually has much lower numbers at higher RPM. I guess it needs more intake and maybe heads to make it come alive.

Curiously, previous owner said this motor was dyno'd at 550hp with that cam. Perhaps the numbers were a little optimistic?
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Old 03-10-2010, 08:43 AM
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The block serial number should be stamped on the bottom back of the block on the pan rail, just outside the oil pan flange. I don't know if Shelby keeps track of them, but I have been curious too. You might try to reach Mike Lefevers at Shelby in Torrance if he's still around. He balanced and assembled my rotating assembly. Been there forever.

Optimistic dyno numbers? People do that???

I have an old dyno sheet that put mine at 558 lb tq and 497 hp @ 4500 rpm. It's an old dyno run and I have since changed carbs and some other things, as I believe it should be posting higher HP numbers.
Going to look into changing my exhaust and do a chassis dyno in the near future.

I have the specs on the build as it sits right now somewhere if you can use any of it for reference on your build. I will try to find it and send you a PM.
I would be curious what your software says about my build too....
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Old 03-10-2010, 08:49 AM
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great thanks! Please do send everything over and I'll crunch the numbers. I doubt the program is really high tech - i need to get something newer, but it does seem accurate when I compare it to real world numbers
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Old 03-10-2010, 08:54 AM
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Found the file, but this system won't let me upload it here. Sent you a PM.
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