416 Longblock built-need help deciding on camshaft-SR or Ft?

[MOPAROFFICIAL]

Wish I had never posted pic of shortblock--I was hoping to get some opinions on cams. J.Rob

LOL..right??
I would look at a solid roller, one I could use with 215-220lbs on the seat and use a k800 spring.

 

[famous bob]

I missed this part, but how is a dish piston going to be able to provide quench?

I'm in the process of lowering the compression in my 493" RB from 12 to 1 to 10.2 to 1. With a .040" thick head gasket, and a 75cc heart shaped chamber. I still have to run a zero deck step piston with something like a 23cc dish just under the valves leaving over 2/3rds of the piston a flat top at zero deck.

I don't understand how those dished pistons with just a ledge around the perimeter will provide any quench. Please clarify if you would.

you need to look nup dished pistons a little more. they all don`t "have just the ring around the outside of the piston !"

 

[joec]

I would do a hybrid, hyd roller cam/ solid lifters lashed tight around .004 .That way you can use less spring pressure get more power than a sft and still have reliability/ longevity.Plus the purchaser can say it has a roller cam and makes it more enticing.Second choice would be a solid flat.

 

[MOPAROFFICIAL]

I would do a hybrid, hyd roller cam/ solid lifters lashed tight around .004 .That way you can use less spring pressure get more power than a sft and still have reliability/ longevity.Plus the purchaser can say it has a roller cam and makes it more enticing.Second choice would be a solid flat.

Someone must have read my post.....a less aggressive solid roller...that works with a lower seat pressure '215-220lbs' & under 500lbs open "kmotion K800" so that a needle bearing morrel lifter can be used and last ....I run such a cam in my stroker @.016 lash.
Depends on the flow chart though...how lil lift you can get away with to make the power goal, it can't be aggressive or those pressures won't control the valve.

 

[joec]

Im talking around 150 on the seat 400 nose.Ive done this before and its amazing how long a lifter will live without alot of lash/spring and still control the valve.Plus no break in on the cam.Just have to take into account seat timing.

 

[IQ52]

Well J.Robb, Maybe, just maybe.........later.

And I don't care what pistons you are using.

 

[yellow rose]

I would do a hybrid, hyd roller cam/ solid lifters lashed tight around .004 .That way you can use less spring pressure get more power than a sft and still have reliability/ longevity.Plus the purchaser can say it has a roller cam and makes it more enticing.Second choice would be a solid flat.

This is exactly what I was thinking.

A NICE hydraulic roller cam with solid roller lifters. You can lash it at .002 cold. With 160-180 on the seat the rollers will live for a long time. May even consider bushed roller lifters rather than needle bearing rollers.

Whatever you do, the end user had better understand the number one killer of roller lifters is wide lash. A close second is dirty oil. Gotta keep up on the lash and keep good, clean oil in it.


After all that, I'd slap a HFT in there so fast it would make yer head spin. Most guys don't even know how to lash valves nor do they want to learn. Neither will they be diligent about doing it.

So HFT for this unknown customer.

Did any of this make sense??

 

[yellow rose]

BTW, I didn't vote until I posted my thoughts.

The vote says I'm correct. Most guys today just want to jump in and hit the key. They could care less if it made max power.

Glad I'm on the short end of my life. I was born a generation too late.

 

[RAMM]

BTW, I didn't vote until I posted my thoughts.

The vote says I'm correct. Most guys today just want to jump in and hit the key. They could care less if it made max power.

Glad I'm on the short end of my life. I was born a generation too late.

I really appreciate your input fellas. It looks like a HFT is winning the

BTW, I didn't vote until I posted my thoughts.

The vote says I'm correct. Most guys today just want to jump in and hit the key. They could care less if it made max power.

Glad I'm on the short end of my life. I was born a generation too late.

I really appreciate your input fellas and YR-thankyou. Looks like the HFT is winning the popular vote. J.Rob

 

[67autocross]

Good call on the juice cam....now what is the price point on EQ heads like you are installing on this 416 in Canadian pesos?

 

[yellow rose]

Good call on the juice cam....now what is the price point on EQ heads like you are installing on this 416 in Canadian pesos?

Canadian pesos???

WTF??? You guys have your own lingo for sure. All hockey sticks to me.

 

[67autocross]

Canadian pesos???

WTF??? You guys have your own lingo for sure. All hockey sticks to me.

Don't get your gonch in a knot over it....

 

[rumblefish360]

OK, made it about half way through the first page with to many people asking questions and not truly knowing about what the heck is going on on the engine.

How about an answer instead?

Stout Hyd. cam. The end user will be happier in the long run!

 

[yellow rose]

OK, made it about half way through the first page with to many people asking questions and not truly knowing about what the heck is going on on the engine.

How about an answer instead?

Stout Hyd. cam. The end user will be happier in the long run!

That's how I voted.

Now I have to go look up "gonch" so I can keep up with the hockey stick guys.

 

[joec]

In retrospect i had to change my vote from second choice to hyd not sft. because of lash adj.

 

[moper]

Honestly I wouldn't be building this "for future sale". So the cam would match the use/user. If I did have the means to simply build something "for future sale" I would go milder and "hands-off" and let the power fall where it may. You're targeting a wider market that way.

 

[jbc426]

I will measure the width of that ledge and let you know just how much area it covers but experience tells me it still provides a significant amount of charge motion.

The step pistons you are referring to in your 493 sound like an Icon piston which is basically 2/3rds of a piston with a much lower compression height and they don't offer much quench at all. J.Rob

Not going with the Icon piston you are referring to, as I am after maximum quench. Was thinking of a custom piston that's "0" decked over 2/3'rds of the piston with a small rim that's "0" decked around the remainder of the piston similar to what you have with a +-23cc dish under the combustion chamber.

Using a solid roller.

 

[RAMM]

Not going with the Icon piston you are referring to, as I am after maximum quench. Was thinking of a custom piston that's "0" decked over 2/3'rds of the piston with a small rim that's "0" decked around the remainder of the piston similar to what you have with a +-23cc dish under the combustion chamber.

Using a solid roller.

If going custom then I recommend you give Diamond a call and ask for Ron Beaubien. Request a conical dish-they make the most power of any configuration I've seen. J.Rob