Ryan00TJ

Stock silent choice = stock HO Cam

Chasing a dozen hp to revert and ruin your new motor sounds foolish.....

Brad Christy

Tartilla,

Not really. We are just going to do the best we can with the heads we have, the stock exhaust and the SilentChoice. Like I said, I’m not looking for anything dramatic. Just want to close the gap between the stock cam and the Raylar 211, without getting into reversion.

Builder already has two shops that can grind anything we want; we just need to determine numbers. He’s got software that will predict results, but not reversion. We ran a number of options through it, and found several that worked, but his “Shouldn't be a problem” isn’t totally reassuring. Again, I trust him, and he IS a marine engine builder, so he gets it. I’d just rather take a more conservative approach and NOT have to pull the engine to change cams when we discover we’ve got reversion, if we can at all avoid it. What I’m hoping for is for someone to cite numbers they have used with similar setups, at least in regard to the exhaust and silent choice, that have worked.

Thanks. Brad.

Brad Christy

Ryan,

And that’s exactly why I’m here. If the stock cam is where we have to leave it, so be it.

Thanks. Brad.

SecondWind

I’d go with a more aggressive cam and buy the wife some sound canceling head phones. That way the Silent Choice System can be sold and the proceeds can support a purchase for some better flowing heads. Just thinking outside of the box a bit.

SB

SB

Everyone remember, the OP is currently only using 2lbs boost. There’s more to be had there. Ie: turn it up…if more power is being looked for.

Tartilla

The Procharger M1 for thr 496 is advertised to be used at 5psi with an intercooler. Not sure if Brad is using an intercooler.

underpsi68

If the op and builder are looking for help on the internet determining what cam specs need to be to not get reversion, I would be looking for another builder/cam designer.

Just my 02.

sutphen 30

a tank of E85 will cure that.

carnutsx2

Custom cams give me pause, not only are all the numbers like lift ,duration, lobe separation important but a lot people overlook lobe shape. Just one more thing to think about.