I am running a roller solid cam. Do I need to run a bronze gear?

Sent from my SM-G930T using SoCal Jet Boats mobile app

In most cases yes.... What Cam? Solid rollers are typically billet and you can you a bronze gear or a melonized steel gear...

I prefer the bronze because they are easy to replace and inspect.

Unless your cam has the iron gear on it.... (rare).

GT

So here it is. Now I gotta find out the specs. Does this look like it needs a bronze gear? How can I Tell?
121633-08
13431
2002 B
Howard's cam. Anyone familiar with this cam? It's in a 496. Gonna run the aluminum center rise Mercruiser manifolds, air gap, and 950 holley set up by performance carb in Ontario. 20.5 70s day cruiser. Jacuzzi WJ, stainless impeller marked "A".

Sent from my SM-G930T using SoCal Jet Boats mobile app

From Howards cams website. Opinions? Thoughts? Remember.... this came installed already.

Sent from my SM-G930T using SoCal Jet Boats mobile app

108 Deg. lobe separation sounds kind of tight for a jet boat motor. U might run into reversion issues? If you are not running headers I may be off on that.

SKU:121633-08Stock #:121633-08UPC #:840793106325

Camshaft Type: Mechanical RollerDuration Exhaust: 295Duration Intake: 289Duration at 050 Exhaust: 263Duration at 050 Intake: 257Engine: 396-502 (Mark IV)Firing Order: 1-8-4-3-6-5-7-2Intake Centerline: 104Lobe Separation: 108Engine Manufacturer: ChevroletRPM Range: 3400 to 7300Valve Lift Exhaust: .725



Sent from my SM-G930T using SoCal Jet Boats mobile app

Agree with GT on gear


Sent from my iPhone using SoCal Jet Boats

SKU:121633-08Stock #:121633-08UPC #:840793106325

Camshaft Type: Mechanical RollerDuration Exhaust: 295Duration Intake: 289Duration at 050 Exhaust: 263Duration at 050 Intake: 257Engine: 396-502 (Mark IV)Firing Order: 1-8-4-3-6-5-7-2Intake Centerline: 104Lobe Separation: 108Engine Manufacturer: ChevroletRPM Range: 3400 to 7300Valve Lift Exhaust: .725



Sent from my SM-G930T using SoCal Jet Boats mobile app

263* @ .050"  on the Exhaust won't be happy with center rise manifolds. (Read : Reversion    )

Nearly 3/4" lift is going to be hard on all the valve train. (More wrenching than boating?)

It's in a 496. Gonna run the aluminum center rise Mercruiser manifolds, air gap, and 950 holley set up by
performance carb in Ontario. 20.5 70s day cruiser. Jacuzzi WJ, stainless impeller marked "A".

Sent from my SM-G930T using SoCal Jet Boats mobile app

(Heavy Ass) 1970's DAY CRUISER., Enough said.

Cam It Mild.

Something like this: https://www.summitracing.com/parts/hrs-120183-10/overview/make/chevrolet 

Drive it forever.

Dan'l

Wait!  What?

I seem to recall quite a bit of discussion about flat tappet cams and high compression ratio.  I have even seen your boat run.

How did you end up with this cam installed?  Were you running this when we met at the Avi?

Since you have been running it, have you had any reversion issues?

What gear have you been running?  Does it show signs of wear?  FWIW, I would run a bronze gear.

I think your high compression needs more cam to be pump gas friendly.

Joe

My 468 has been running great, though.

Sent from my SM-G930T using SoCal Jet Boats mobile app

My new question is: going from the current roller cam specs to the cam recommended by Dan'l, can i run the same springs?

Sent from my SM-G930T using SoCal Jet Boats mobile app

Gonna put the 468 in my lil bros 19ft hallett bubble deck.

Sent from my SM-G930T using SoCal Jet Boats mobile app

I never ran the 496. I bought it used from River Dad.

Sent from my SM-G930T using SoCal Jet Boats mobile app