Da Z06

All depends on his cam timing and overall combination. Its not just a one size fits all. The runner is not just cut, but also the runner entrance will be reshaped with a fully radious/bellmouth entry.

441LSXTT

Very awesome of you to do that. i would consider it but the MSD does not work well with Brodix heads. With the billet intake it fit perfect and I had no vacuum leak but obviously the intake did not work well I installed the MSD intake and it does not that fit flush for **** we cut and shaved the sides and you could still feel it wobble some areas so looking for a different Intake to get rid of this vacuum leak. So really I’m ready to get rid of this Intake. I would definitely let you do it if I have no issue. The question I have is how much power are you thinking you can gain?

double06

Do you think part of the fitment was the heads were decked down quite a bit to get the compression up? Is the port higher on Brodix or something lese that would cause this?

441LSXTT

Maybe but what’s funny is the sheet metal billet Intake fit perfectly fine with no vacuum leaks

441LSXTT

It seemed like the MSD intake Was hitting on the sides to where it made it did not fit flush to the head like some of the plastic was hitting the top of the head we shaved it and made it a lot better

441LSXTT

It seems like since the sheet-metal Intake was higher up and there was nothing in the way it fit more flush and we could see all around it

Da Z06

Did you check the head studs? That was probably what was preventing it from seating. If it was the gasket collapsing, then may be the option would be some home made gasket made of Teflon sheet?

FNBADAZ06

Horsepower Research has my Mamo ported MSD now, and my heads are identical to Jeremy's (Anthony will confirm combustion chamber again). I think Jeremy's head came in a bit larger in combustion chamber IIRC , so required a thinner than stock head gasket to hit 13:1.
That shouldn't have caused the misalignment, but I guess anything is possible. We shall see how my MSD bolt's up, as I had always planned to engine dyno with the MSD along with whatever intake I ultimately end up with (waiting on my FAST as of now). I use ARP head bolts, not the studs.

I've given thought of shortening up the runners to get the MSD to peak 600 RPM higher than what they seem to be doing on the 468's (roughly 6400 RPM with 102 TB, regardless of cold air, cam, or header setup).

Da Z06

It will add to to plenum volume and that is something your 468 is hungry for. It will add another usable 500-1000 RPMs and move your peak up about 500 give or take 100 or so. On a HCI stock short block it started to make more power than a ported MSD by 5000 RPMs, it peaked about 300-400 RPMs higher and made 40RWHP and 30RWTQ (590/520 vs 630/550) peak to peak. It also matched a similar combo equipped with a cam with 7 more degree intake duration, and a Hi-Ram up-to ~7000RPMs, even then, the modified MSD was still making over 610RW (630 peak) by 7500RPMs.

Down low it matched the ported MSD from about 3500RPMs up to 5000 where the modified MSD just took off.

I think I posted the graph on your original thread.

Da Z06

I had to clean up the bolt "head" pockets on my old MSD to 100% clear the bold head and ensure that it rested with no biding.

FNBADAZ06

We shall see if a similar clearance will be needed on mine as well. It wasn't necessary with my .030 milled OEM heads, OEM head gaskets, and ARP bolts.

Jayfabs

this is making me think about modding mine also to move my peak power up since I’m mainly 1/2 mile racing and pulling to 7400. My peak power is 6400 then drops a little.

Da Z06

I'm willing to help. I will do one free of labor (only pay for shipping to/from and a modest amount for my supplies) to validate the first results in exchange of a before/after dyno.

Jjagg0125

Man I'm intrigued on how that would make a btr2 cam cars power and look...... I mean I have been thinking about a msd

Jayfabs

Sounds good to me. I wouldn't be able to send till the end of April. I have a 1/2 mile event on the 13th and 28th. I have not changed anything on car since the last dyno. It does take 2-3 months for me to get a dyno day. So I just have to book it ahead of time. I believe ive seen pictures you have posted before.

tdeweese

Jayfabs, can I ask what your engine setup is when your ran the 244/258 cam and what you changed when you went to the 247/261? What didnt you like about the 244/258? Noticeable gains after 247/261? Trap speeds.

Ths
Tim

ayeyomoe

I also am curious on your engine set up. Do you mind sharing what it has? If not public, could you dm?