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Old 02-06-2009, 03:05 AM
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cam for 502 8-71 supercharged

Hey,
I need help selecting a cam for a 502 big block with a 8-71 supercharger.
Any help given is appreciated

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Old 02-06-2009, 10:16 AM
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What kind of cam are you thinking of (hyd., roller, solid, flat tappet)?

In either case you will be better off calling a few cam companies and having a cam custom ground if you want to make big power. If it is just a street rod type of engine (more for looks that performance) then you can get by with an off the shelf cam.

Companies I would recommend calling are: Cam Motion, Reed Cams, and Engle Racing Cams.

I have an Engle Racing Cam in my blown 388 and a Cam Motion Cam in my blown 400.

It is money well spent and you know the cam will do what you want it to.
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Old 02-06-2009, 07:07 PM
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Need more details of your motor and how you plan to use it.
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Old 02-06-2009, 09:38 PM
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I plan on going the hydraulic roller route, but am liable to change my mind on the matter. Iwould like this to be a street rod, but with a focus on more quarter mile power than anything else. I am new to hotrodding so any thoughts on the subject are appreciated.everything in the block is forged and it has aluminum heads.

thanks,
Erik
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Old 02-06-2009, 09:49 PM
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Eric, what kind of power do you want to make? You have a car in mind to put it in? What heads?

You really need to make a plan, check the bank account and go from there. What part of Anchorage are you in? South Anchorage here, off O'Malley and C.
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Old 02-06-2009, 10:04 PM
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Is this a GM 502 crate motor you want to supercharge?
Which version?
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Old 02-07-2009, 12:09 AM
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I've alloted about 15grand to the engine. im planning on using the zz502 crate motor without the intake, carburetor ect. im dropping it into a old ford, which i am hoping to turn into something of a rat rod with a nice motor, so im not going to put much into the body, maybe a flat black paint job and chopped top, both of which i can do myself, so the most expensive part of the build is the motor and i planned as such.
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Old 02-07-2009, 12:11 AM
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I am in the south anchorage part.
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Old 02-07-2009, 11:13 AM
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Ok if that's the game plan I would buy an off the shelf "nitrous cam" with 112-114 LSA (lobe separation angle). You don't need anything to wild.
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Old 02-07-2009, 07:03 PM
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alright, sounds good. thanks for the help.
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Old 02-07-2009, 07:31 PM
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[QUOTE=Cold1]I've alloted about 15grand to the engine. im planning on using the zz502 crate motor

Stop right there.With $15k budgeted..you can purpose build your blown 502.
The zz502 has a bullet proof rotating assy..but the 9.6/1 static cr with the tin eddy rovals will not allow you to take full advantage of the 8-71 unless you are using e-85 fuel.
Better to build a custom 502 with say 8/1 static and pulley up the 8-71 to pack the cyls.
It has been done a million times..but I would not put an hydraulic cam in any blown big block.That is a very heavy funky valvetrain and the last thing you need is an intake valve hung open underneath a big lung=kaboom.
When you decide on what rectangular head you select(Blown 502)..the flow #,s will allow you to spec out a cam that complements the head and is blower friendly to boot.For the most part..blower cams favor the exhaust side and spread out the lsa so as not to blow thru the exhaust valve during the overlap period.This depends on the head flow and the choice of material.
Some would run 110 lsa to cool an ss valve while some prefer 114 lsa with an inconel.
I would keep the overlap down and select the 114 lsa.Thats just general though..a custom cam grind can still have ample duration with minimal overlap on a 110 lsa.

Last edited by fatblock; 02-07-2009 at 07:38 PM.
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Old 02-07-2009, 08:38 PM
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wow, thanks. I didn't even think about it like that. I guess it would be better to build it from the ground up. Any manufactuers you would suggest? i was initially planning on using some dart heads, but decided against it.
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