Best cam

Weatherby

New Member
Jan 4, 2021
16
Hi guys , looking for some advice on a cam choice . Rebuilding a 350 in my 73 lt/rs/z28 . Is a matching numbers car so trying to keep it fairly stock yet get as much performance as possible. Had it bored 30 over and have flat top je pistons for it , heads have been ported etc . Would a person stay stock cam or go roller cam . Car is m21 with 373 gears . thanks
 

tom3

Veteran Member
Aug 1, 1999
15,151
ohio
Used to be a flat tappet cam, slop some STP on it, no worries. These days it's a lot different. If the cost factor allows I'd certainly go with a roller cam with good lift and moderate duration. I'd also look at a complete kit that eliminates worry about the dist. gear, fuel pump rod, and camshaft end control. Even with the large chamber heads with the flat top pistons car should run pretty darn good.
 

Lowend

Administrator. .a car, a man, a maraca.
Staff member
Lifetime Gold Member
Mar 25, 1999
16,895
San Jose, CA, USA
Personally - I'll never use a flat-tappet cam in a SBC again. Seen too many problems.
That said, I understand if you want to keep the car original. The CompCams 12-106-3 is very similar to the factory L82 cam which was used in Corvettes and Z28s of that era. It would keep the original vibe.
Understand that you will need to run a flat-tappet-specific oil like Driven's Hot-Rod oils if you want the cam to survive.
 
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ChevyReb

Veteran Member
Lifetime Gold Member
Feb 4, 2003
4,579
SC
It's a 4-speed car so I'd be thinking duration could be up a little to help. If roller with tie bar lifters are used you will have a little chatter in there that sounds a little like a solid FT. Match the lift to the flow of heads and springs.
 

G72Zed

Veteran Member
Sep 8, 2015
4,405
Canada
What's going to be the final compression ratio ? and, are you using the original Qjet and cast iron intake/exhaust manifolds ?

If around the 9 - 9:5 range, I like the one that Lowend mentioned (222 @ .050, .447 on a 114 LSA)

Use a good lifter like the Howards direct lube 91116 combined with Driven BR30 oil for the first few hundred miles, then a quality oil with the correct add pak for FT cams, like Valvoline VR1 10/30.

Make sure your lifter bores are in good condition and the lifters can spin freely in them, between that and the wrong oil/spring pressures, that's when most of the issues rears it's ugly head.
 

HOGDADDY

Veteran Member
Jun 8, 2005
525
Birmingham, Alabama
I have said it before; The smallest Lunati Voodoo hydraulic roller has excellent street manners but since it's billet roller it requires a different pushrod or better yet, go with an electric fuel pump.
I agree with Lowend. I would not use a flat tappet camshaft.
 

1980RS

Veteran Member
Jun 17, 2006
6,635
MN
I would buy another Elgin cam in a heartbeat. Never had any trouble with the ones I have broke in. I have had good luck with some Summit cams also, I will never buy a Comp flat tappet cam again as after 30 minutes it lives up to it's name "flat tappet" then buy another one.
 

G72Zed

Veteran Member
Sep 8, 2015
4,405
Canada
so trying to keep it fairly stock yet get as much performance as possible.

If you are not constrained to a budget so to speak, then there's many ways to tackle this. Hydraulic Roller cam with all the correct supporting parts is a move in the right direction. And if that's the case, a nice thin metric ring pack is next on the list...if not first.

You can get a lot of performance from "stock" parts paying attention to details and setting a good build plan right from the get-go.
 

tom3

Veteran Member
Aug 1, 1999
15,151
ohio
I recently bougtht a new Edelbrock Performer Plus camshaft. Had really good luck with those both from reliability and performance. Then I saw that they have bought out Comp Cams and my new cam sure has a different look than the old cam. White box, rougher looking casting. Might be an expensive door stop?
 




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