https://cimg7.ibsrv.net/gimg/www.off...c78dae024d.jpg
cam card

Very nice!

Smitty the one thing you can't see is the intakes have either 2 or 2.5 inch stuffers in them, I can't remember. Hogan built them with big enough plenum so they could add length to the runners. We ended up doing that to get our torque curve where we wanted it. Sorry I dont have any pictures of the inside of the intake.

Are you looking for this?
https://www.edelbrock.com/victor-ram...fold-7078.html
.

Race boat app?

No they are in my 42 poker run fountain. I have a thread about it in the fountain section.

What a nice build. I should have a good comparison especially with the jones cams being fairly close at 255-259/724-724 114 lsa

I’ll start a thread when I figure out induction and close to being on the dyno. What intake cc’s you have on your rfd heads? Tks for sharing.

I just cked out your thread in the Ftn section. I’ll read all the post when I have a little more time but very impressed from skipping through it.

Not sure without looking it up may be mentioned in the thread. We built these with the intention of whipples. Dustin did the tune on these and we are thinking of the new gen 5 3.8 whipples. The one thing that worries me is keeping afr's and egt in check. When we rigged the boat we had imco put 3/4 inch pickups in the new fuel tanks, we run all -12 line to the water separator then to pump. After that -10 from final filter to engine. Its important that you can achieve needed flow but also maintain it for extended periods. RFD is going to soften the quench in the heads that will help with premature detonation. Had some conversation with Eddie Young about thoughts and his experiences with these. Won't be doing it till next winter but gives us plenty of time to research and amass parts.

What kind of fuel pressure you maintaining currently at wot. Great job on the rigging!

Thanks, 48 lbs.

Impressive engines KW!!

RFD?
Soften the quench?

Top tier components & engineering for building power

http://www.raceflowdevelopment.com

they cnc the quench area of the head to slow and control the burn rate. Helps In boosted and nitrous apps.

I LOVE those intakes and I like that idea of extra runner length, when I dyno 454's/ 502's with typical open plenum intakes, the tq is nothing to write home about having 4.5" or so average runner length to head. bumping compression up on those little engines helps, advancing cams helps but in end, Ive seen modified long runner merc intakes kick their ass when it comes to torque. On the other hand, all the mods in the world wont get a long runner merc intake to ever make any "real" hp like a open plenum on top and of course with their smallish runners even modified they would die especially early on anything much over 515 ci. With about a 6' runner length, the edelbrock proflows that resemble your intakes carry well on top and make OK tq. , the next step up is a tunnel ram or a custom intake like what you have. Id love to see a front mounted TB production intake with a 8 or 9" runner and plenty of plenum volume but it doesnt exist. I made about 695 hp/620 tq from a 502 with small cam with a proflow and oval afr heads a few years ago, I recently made around 685 hp but with tq around 640 with a 515 with a few degrees less duration then the previous one mentioned and ICL moved down, also on 89 with oval port AFR heads. I have few more of those intakes BUT in rectangle port version and have yet to see how they really perform, or find their limitations, Smitty

I’m calling Rogan tomorrow and keep you posted. Always heard great things and jim b has as well. I wanna get port bungs for port injection at a later date but will stay with 4150’s on top for this coming season for simplicity.

Smitty, i came across this pic year or two ago. I’d be damned I can’t find anything on this intake anywhere. It has to be somewhere.


https://cimg9.ibsrv.net/gimg/www.off...c90217531.jpeg

Holy mother of intakes!

GM made a intake like that way back when, they were after longer runners without going too high.
I think I recall engine masters testing it in one of the intake shootout episodes .

Well well , that seems like if it truly works to help with detonation like a no brainer.

I believe that is an 8.1L/496 intake manifold.

That looks like the 8.1L/496 intake that Tyler Crockett had for a little while. There was a Advantage boat over at LOTO for sale with one just like that a few years ago.

You may have seen this however thought I’d post anyway. Something not discussed much.

https://www.yellowbullet.com/threads...or-na.2657091/

http://www.rockettbrand.com/download...low%20Burn.pdf

Looks like this is angle cutting the heads? In effect reducing chamber volume? That has been going on for a couple decades I am thinking. Big Chief chambers were like 75-80 cc's and didn't like timing much over 30 deg?

For sure - just doesn’t get brought up much. Not that I’ve seen here anyway.

[QUOTE=bob;4816312]Looks like this is angle cutting the heads? In effect reducing chamber volume? That has been going on for a couple decades I am thinking. Big Chief chambers were like 75-80 cc's and didn't like timing much over 30 deg?[/QUOTe
when they angle cut the quench it's done on a 5 axis because it's only the quench in the combustion chamber that gets cut. Not the whole deck.

So in effect it actually increases the volume of the chamber so it will lower the compression.

As KWright said. They're not reducing chamber volume, actually would increase it slightly.
They sort of "Hemi" it so to speak. Angle mill just the flat areas of the chamber, towards the center.

I used to have a guy put my heads on a flow bench and put a piece of yarn in the air path and watch to see where the circular pattern was in the chamber and then re-configure squish area to get center of flow to be in center of chamber. Did each chamber. Not really sure if it was all that important but it sounded good at the time.

FWIW, Arizona Speed and Marine from what I can come up with. Old thread regarding one.

https://www.offshoreonly.com/forums/...hp-engine.html

And the most recent thread that I remember that picture from. (Which was a pure sh it show)

https://www.offshoreonly.com/forums/...ey-hp-efi.html

Anyhow, back to Tunnel Rams.

^^^^^ wonder how that 11;1 12-13psi engine is working out .

Chamber softening adds volume. It pushesthe air and fuel toward the center of the cylinder. It will let you run more timing, compression or boost.

Completely different design than angle milling.

Good question. Doubt we'll ever know.
He started that thread asking how to tune it, then in the thread said he had the best tuner on earth. :grinser010:
Then couldn't take the heat from the crowd.
That's Cliff Notes on the deal.

Even on 110 that’s too much.

It would have a chance on E85. Being at elevation helps though.

Okay, that made me look at pic more. Yup, Gen VII. Bolts/Frt oil fill tube, etc. Anyone know who made it ?

Someone shoukd make if for the IV-VI. Chop, chop. :)

I just got off the phone with Tim Hogan in regards to a couple of manifolds. Really neat guy to talk to. I gave him a brief rundown on my builds and rpm range. They are about 12 to 14 weeks out currently. I really like the idea of him calculating out the runner length etc for desired RPM and use. He said they do quite few marine apps with great success. Honestly I was hoping he’d say 6 to 12 months out on delivery. Very nice piece but damm ramm 3,800.00 x 2. 😳

You glared right past it in post #150.
Here's some more help though. :drink:
Also link from Raylar site. (notice the link address in the address bar once ya open it.) https://www.raylarengineering.com/im...e-manifold.jpg


https://cimg3.ibsrv.net/gimg/www.off...2a4811b9db.png

Say whaaaaat? SB missed something! Hah. 😎

Thanks !
I don’t see much unless I’m on Pornhub. Lololol

that thing is fuggly.............