New cam setup
 

Have a question it’s to late because I already made the choice and built the motors with this. But I’m reaching out to see what everyone things of this cam selection. So I did what I’d call a mild engine build on my at one time stock 330hb 454’s. I did a 750 carb. Edelbrock performer rpm air gap intakes. Exhaust and cams. My biggest question is am I going to run into future problems with my selections. If so what issues do I need to look for or what can I do to avoid these issues. Here’s the cam kit I ended up going with. I am running a wet exhaust as well. I will try to post a pic of the exhaust. As I also have a question that I’m sure someone could help me with on how to dump water further back instead of right up front. Very new to the marine performance game appreciate all the help and possible step by step solutions.

This is a link to the cam kit I bought.
http://www.jegs.com/i/COMP-Cams/249/K11-236-4/10002/-1

I'm not an engine builder, but it looks pretty mild to me compared to what I've run without any problems.

You should be fine. The risers have a tall bend, so reversion should not be a problem

Those are double walled risers. The water doesn't enter until after the bend going down and ust a few " before the 4" rubber hooks up.

I'm running Merc 496 Aluminum exhaust with a 288/294, Lift .585/.610, 112 L/S cam. No issues.

http://supernova19.com/11c780e00.jpg

Isn't it strange I was running a cam close to your duration's but less lift and I had reversion using the stock 496 risers lol. Nice healthy cam how is that working?

If one is measured at .004" and another at .006" you can't compare seat duration easily.

Edit: Also, I see f_inscreenname pic above has S pipes. These help stave off exhaust water reversion also.

I agree. Yet to remove all doubt, idle for 5 mins and remove a riser. Look down into the exhaust manifold. For better or worse your question will be answered.

@.050??
That is a lot of duration for that amount of lift. Hows the valve train like those ramps? Damn

This is my mark IV, 454, stroked and roller'ed to a 496. I have to say I didn't always build winners but I seemed to hit it right with this one. No reversion issues. Has a bit of a lope during idle but besides that.... Most everything is off the shelf. Open 118 heads but use +18 dome pistons making it about 9.5 to 1 so its even good with pump gas.
Build sheet >>>> http://www.supernova19.com/current_b...nova19_com.htm

Yeah I did see the S pipes after I posted and can see how they would help with reversion....good to know for future reference!

Its a hyd flat tappet cam and the numbers are similar to the Crane 420/525SC cam

http://supernova19.com/11c780e00.jpgThese elbows look like they would dump water in the motor every time you slow down.

Most Eliminators have them.Hard to find another manufacturer that has more crazy power installed in their boats.

I'm not picking on anyone, anything, just thinking if the riser was long enough to dump at the 90, reversion would be a non issue. I could be wrong.

I quoted and was refering to Fingscreenname.
(288/294, Lift .585/.610, 112 L/S cam.)

your cam is just fine.

Ooops...........didn't see that.

Being I have had the set up for 4 or 5 years now I can tell you there is no reversion issues. It has Merc 496 Aluminum manifolds and their SS risers. They are the tall of long version but that only means a 1/2" taller then the shorter ones. From there it all stays 4" and goes to the outlets in more of a pulled out "Z" pattern. In other words it don't double back on its self. All of it leans to the transom. It does have flappers on the tips. Nothing special but it works.
You can see the angle better in this picture,

https://cimg8.ibsrv.net/gimg/www.off...30abdf1aad.jpg