What "Mild" roller camshaft would you suggest for either 355ci or 383ci SBC?

[NormRinker]

What "Mild" roller camshaft would you suggest for either 355ci or 383ci SBC?

What mild roller camshaft would you suggest for use with roller lifters (and maybe roller rockers) in either a 355ci or 383ci small block chevy running the stock exhaust manifolds and risers through the transom exhaust?

My original motor is a '98 250HP 5.7L Vortec 2 barrel carb'd motor that blew a head gasket. I want to bump up the power slightly by going to a 4 barrel set up as well as a mild camshaft if possible on my next motor.

Thank you all!

Norm

 

[John_S]

Re: What "Mild" roller camshaft would you suggest for either 355ci or 383ci SBC?

Re: What "Mild" roller camshaft would you suggest for either 355ci or 383ci SBC?

Without modifing the vortec heads, you can not go much higher in lift. Can't go to 1:6 ratio rockers with stock cam. Dennis Moore recommends Crane Compu Cams 2031 and 2032. The 2031 is too close to stock specs to me. The 2032 is about a 25hp boost.

COMP CAMS MAGNUM ROCKER ARMS SBC SELF-ALIGN 1.5 1417-16 These will fit under valve cover and give a true 1:52 ratio. Just don't expect much, if any, hp gain.

 

[NormRinker]

Re: What "Mild" roller camshaft would you suggest for either 355ci or 383ci SBC?

Re: What "Mild" roller camshaft would you suggest for either 355ci or 383ci SBC?

Would either one of the camshaft choices you listed work with stock exhaust set-up through the transom?

I know based on my reading that the Vortec heads are good for up to .475" lift give or take a little without machine work.

Thanks

 

[John_S]

Re: What "Mild" roller camshaft would you suggest for either 355ci or 383ci SBC?

Re: What "Mild" roller camshaft would you suggest for either 355ci or 383ci SBC?

The 2032 has 0.465 lift on exhaust, which does give you a slight safety margin. Both work with stock exhaust.

 

[NormRinker]

Re: What "Mild" roller camshaft would you suggest for either 355ci or 383ci SBC?

Re: What "Mild" roller camshaft would you suggest for either 355ci or 383ci SBC?

The 2032 has 0.465 lift on exhaust, which does give you a slight safety margin. Both work with stock exhaust.

Do you know what the stock camshaft lift specifications are? My #24 MerCruiser service manual doesn't tell. It has measurements using different specifications.

Thanks

 

[John_S]

Re: What "Mild" roller camshaft would you suggest for either 355ci or 383ci SBC?

Re: What "Mild" roller camshaft would you suggest for either 355ci or 383ci SBC?

W/1.5:1 rockers: Intake: 0.430", Exhaust 0.450"