I don't know that we would have paid extra for it but comp didn't charge any extra on top of the custom grind.

I'm a$$uming you're not talking about a generic BB Mopar...

Why would a core for these cost any more than any other billet core, they’re all just a round bar of steel !!!

I'll take a w.a.g. here (and am fully expecting to be corrected by others in the know)...
- Common steel roller cams are ground on less expensive rough-ground cores which are limited as to both LSA and firing order options
- Stepping up to something completely custom will incur a price increase for a higher quality core, as well as additional labor for machining a UGL (unground lobe) core

The cost for a "basic" roller from someone one like COMP is maybe $400; get something from Jones Cams that could be basically the same thing on a higher quality rough-ground core and you're over $500. Go the next step to go "full custom" on firing order, etc., where you have to start with a UGL... all I can presume is it's "more", but don't know how much "more".

Nope, generic LA small block.

To any many times guys get caught up in "zoomy" ideas and parts. I think about ET/$. This does not fit that category in my book. Even though my cam is a 4/7 swap.
Doug

Doug you know I highly respect your opinion so thanks for weighing in. I am trying to factor in a 3rd metric and that is service life. I know how much hp I need to get where we want to be at race weight in blackie.

For laughs let's say it was a no cost upgrade. Would everyone be jumping on the ship?

All input much appreciated!

0

It seems like the 700-1100 range is what the quotes are coming back at for a finished product.

For a BBC shelf roller cam, it’s about a $50-60 bump in price.
Comp 11-734-9 vs 11-749-14
Same cam, std FO vs 4/7 swap

(Actually..... those two are only about $30 apart from Summit)

Still not used in everything.

1. I see what you are saying. I have a hard time making decisions based on a few broad, ambiguous statements made by one guy at one company. Especially after being interpreted by another human being into print lol.

2. It's a matter of having lunch at a diner or eating trail mix for a few months. To me there is no savings only allocation.

3. I like the numbered q&a format : D

Get a definitive answer!!!

Buy and test both the std FO and the LS FO.

Then we’ll all know exactly what it did in your particular combo.

Don't think I haven't considered that! The other 511 has a standard FO jones roller so i sorta already have the "a" cam. That one is 112 LSA and this one will be 114 and more nitrous centric build. Both 511's will be 250-300 shot max. Low use stuff as I am just a casual/fair weather car guy lol.

From what I have gathered the only theory behind the swap is cooling and crank whip mitigation. How much is apparently highly debatable.

Are 4/7 swap roller cores available for BBM? Or is any firing order change stepping into $$$ territory?

And, no, I'm not considering this for myself. Strictly "for informational purposes only."

"Asking for a friend"

My understanding is that any firing order change is a custom core. I called a semi local cam.grinder today and the fellow i spoke with did not think it was a big deal to get a core with the 2-3/4-7 swap. It will be interesting to see what he comes up with.

Stop the presses, a critical thinker.

Not me, bro... I ain't got no friends.

I'm sure there are some combinations that would see on-track improvements from firing order changes, once dialed in.

I'm equally sure mine isn't one of them.

Not having a tv does that to ya! I try to make moves based on facts and data. When that isn't possbile you have to take a leap of faith. Lets see...4$ coffee and a Netflix subscription or a custom cam? Much like the government I am guilty of cutting funding to underutilised/obsolete programs and reallocating said funds to tangible goods that burn c12 and make lots of noise. : D. My wife is on board with the "just make a decision and shut up about it" school of thought. She is the only one around to talk to about this stuff lol. Three nights of 2-3/4-7 swap talk has her wanting to move on with the build!

It helps to talk about it, to get it out. I understand.

You called be "bro", like it not we are buddies lol. Think of all the fun things we could do if you had not have run away from home!

I am looking at this from three sides performance x $$$$ x service life.

It's an exercise and to be honest I expected the response to be in favor of doing what we know with the standard FO. It's not like I am trying to revive a set of Stage 6 heads or hotrodding a 276 Desoto. Just pounding out the merits of a FO swap.

From my perspective Andy and PRHman have valid data. Andy dyno'd againt this theory and PRH has marine apps with roots blowers showing zero improvement. To me that is credible.

While articles are good food for thought I don't rely on journalism to shape my future as I don't rely on politicians to have my best inteeert in mind.

It is winter...for you guys lol. I drove my 66 Coronet to town yesterday.