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Old 09-07-2009, 03:20 PM
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Cam for a 455 olds, tips, or info wanted

Well I went ahead and put back on the ole Holley 750 Double pumper, Next I am going to be setting the timing to get her crisp.

I think I'm ready to do cam, springs, etc. And more than likely a new stall.

I have found a kit that comes with all the goodies and a Comp Cam.


Im torn between these two kits. (Any input on them is also greatly apreciated)

First one, little midler- http://cgi.ebay.com/ebaymotors/Olds-...Q5fAccessories

And the second one- http://cgi.ebay.com/ebaymotors/Olds-...Q5fAccessories



Is there anything else I should get along with these kits, and which one would be best?

The car is mostly a street car but I like a nice chop in the idle and love to get on it, and strong launches, also it will more than likely end up at the strip a good amount of times.


Thanks fellas and look forward to your knowledge!

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Old 09-07-2009, 03:35 PM
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Quote:
Originally Posted by littlehandegan
Well I went ahead and put back on the ole Holley 750 Double pumper, Next I am going to be setting the timing to get her crisp.

I think I'm ready to do cam, springs, etc. And more than likely a new stall.

I have found a kit that comes with all the goodies and a Comp Cam.


Im torn between these two kits. (Any input on them is also greatly apreciated)

First one, little midler- http://cgi.ebay.com/ebaymotors/Olds-...Q5fAccessories

And the second one- http://cgi.ebay.com/ebaymotors/Olds-...Q5fAccessories



Is there anything else I should get along with these kits, and which one would be best?

The car is mostly a street car but I like a nice chop in the idle and love to get on it, and strong launches, also it will more than likely end up at the strip a good amount of times.


Thanks fellas and look forward to your knowledge!
I have never used the 280H but I have ran the 292 in both a SBC & BBC in a 68 Camaro. I love the sound of the 292 and the power range was good too. I would however check that these kits contain matching components. I have had some experiences with ebay parts and tend to steer away from them now. You could find this same combo in Summit or Jegs and "maybe" have better customer support or satisfaction if something is not right. JMHO
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Old 09-07-2009, 03:44 PM
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I guess the 292 will be alot more tame on a 455 than a 350.

Heres what is says about it- Street/strip, 3000+ stall, aftermarket manifold, low gears, increased compression. Very rough idle


But I assume they say that with the 350 in mind also??
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Old 09-07-2009, 04:01 PM
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Olds motors like dual pattern cams due to the crappy exhaust ports. Engle has some nice grinds, like their 40/43 or 43/46. Mondello (yeah, I know...) has some nice dual pattern grinds that are actually Engle cams - the patterns were developed by Joe when he was still actively involved in the company.
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Old 09-07-2009, 04:14 PM
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Olds V8 motors can/will be a bit more involved when it comes to installing a aftermarket high perf cam. The stock motor has a non adjustable valvetrain.
Usually you either have to get custom length pushrods and/or convert the rockers to adjustable type to get proper rocker adjustment for correct hyd lifter plunger preload. The gap between the installed valve seal and bottom of the valve retainer is limited. cylinder head machining is often required for more than .500" valve lift.

You probabily should get some one with some experience with convertering/upgrading Olds or Ford motors with OEM non adjustable valvetrain to help you.

The cams you are looking at require a high stall converter and high ratio rear gearing. They do not work that well with stock (8.5:1) low compression ratio.
The distributor advance will need to be recurved.
If dialing in a Edelbrock carb is over your head, you will need help with this one.
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Old 09-07-2009, 06:05 PM
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Lunati, Bullet, Engle all offer good grinds for the Olds, or contact one of the Olds builders like Bill Travato(BTR Performance, New York), Smitty(M&J Proformance, Ohio) , Dick Miller racing(Missippi), or Rocket Racing(Wis.)
They all have websites with their contact info, and all of them race Olds powered cars.
They all can recommend a good cam(pre-made or custom ground) to match you application. 455's make huge amounts of torque if you dont overcam them

Travato runs NMCA with a 76 Starfire that goes 7.90's with 403 CI of Olds motor.

There are several companies that make bolt on, shaft mounted, adjustable Roller Rockers, including Scorpion and Harland Sharp.

You can also get a basic adjustable set up(Roller Tipped rocker, no roller bearings))from Comp Cams, or buy just the studs and guide plates from Comp and a set of 3/8's 1.6 Roller Rockers from Scorpion
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Old 09-07-2009, 07:47 PM
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So these arent your basic put in cam and go kits?
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Old 09-07-2009, 07:52 PM
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Quote:
Originally Posted by littlehandegan
So these arent your basic put in cam and go kits?
It depends on the cam. Since the stock valvetrain in Olds motors is not adjustable, differences in cam lift must be accommodated by the amount of adjustment that can be accommodated by the lifters. SOME aftermarket cams will work with the stock valvetrain no problem. Anything over about 0.500" lift really wants adjustable rockers or pushrods. As noted, the later SBF motors were the same way.
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