390 camshaft replacement

Reply Subscribe

Thread Tools

Search this Thread

Apr 2, 2008 | 12:04 PM

blueovalboy_69

Thread Starter

Freshman User

Joined: Nov 2005

Posts: 39

Likes: 0

390 camshaft replacement

I have a recently rebuilt 390 and I am not satisfied with the bottom end so I am looking to replace the camshaft. It has an edelbrock 750cfm carb and an edelbrock aluminum intake meant for idle to 5500rpm. It has stock rebuilt heads and high compression pistons and headers. I was wondering if anyone had any advice on what kind of cam would work best?

Thanks Blueovalboy_69

Apr 2, 2008 | 02:29 PM

65f100_352

More Turbo

Joined: Apr 2007

Posts: 572

Likes: 3

The comp 268 would be a great cam for your truck. 1500-5500rpm. Has all the low end you need and a lot more top end than stock. PN# 33-224-3 for the cam and K33-224-3 for the complete kit.

Apr 2, 2008 | 03:22 PM

Bear 45/70

Post Fiend

Joined: Mar 2004

Posts: 6,056

Likes: 8

From: Union, Washington

Replace the 750 carb, it's too big and hurts the bottom end. A 600 will work better and is good to 5300 and just how often do you really need to run 5500. FYI, that 7500 is good to 6600 RPM and you don't need it. Besides the 600 will improve mpg. I agree with 65f100_352's recommendation for a cam, unless the cam you have now is in the same ball park, then you problem is overcarburation, a common one BTW.

Apr 2, 2008 | 04:56 PM

blueovalboy_69

Thread Starter

Freshman User

Joined: Nov 2005

Posts: 39

Likes: 0

Thanks

Thanks I will take you guys advise and order up that cam!

Apr 3, 2008 | 08:26 AM

blueovalboy_69

Thread Starter

Freshman User

Joined: Nov 2005

Posts: 39

Likes: 0

I ordered the comp 268H cam but in the description of it it said that it was meant for 9:1 compression and under and that any higher compression would just work against the cam; my engine is running at about 10:1 or a little higher is this something to worry about?