Split dominator manifold & camshaft

[funsummer]

Kevin,
Agree totally about the carbs internal setup.
Hence why I have contacted the original carb supplier and will be seeking there advice on changes required.
It's certainly not going to be a simple bolt on part.
Will also be buying and reading a few carburettor books to really understand the reasoning and methodology behind recommend changes.
And also being able to give more detailed analysis of problems encountered.
Steep learning curve for sure, but something I am very interested in.
Appreciate your input
Joel

[blykins]

You just have to keep an eye on the amount of overlap you have when you're working with individual runner setups.   With a solid flat tappet or solid roller, you're in a better situation because there's less major intensity.   In contrast, a lot of the hydraulic rollers we use have a really high advertised duration in comparison to the .050" duration, so you're already at a disadvantage with the amount of overlap that you have.  That's why you see a lot of individual runner camshafts on a 112-114 LSA.  You will need to keep velocity high at the carburetor, or else you'll see a little cloud of fuel hovering over the engine. 

It's certainly do-able, but there are too many variables at this point to nail down a .050" duration, advertised duration, LSA, etc. 

[funsummer]

Brent,
First place I was going to start after confirmation from carby builder was to get cylinder heads flowed to confirm flow numbers.
Then see what numbers can be achieved at what $$
Hopefully somewhere close to 300.
What other numbers/ things need to be done before I should consider cam specs?
I have rest of engine/ car built or ready to assemble.
444 cube, 65 galaxie, built c4, 2800 converter, 3.89 diff.
Heavy car, tough street certainly not a daily driver.

[scott foxwell]

You might experiment with some big-bore single cylinder engine reed valves. I know a few guys who have played with this idea on conventional intake manifolds but not sure if anyone has used them with an IR intake. I know some four stroke MC engines use them.
I would talk to Chris Straub about the cam.

[blykins]

Brent,
First place I was going to start after confirmation from carby builder was to get cylinder heads flowed to confirm flow numbers.
Then see what numbers can be achieved at what $$
Hopefully somewhere close to 300.
What other numbers/ things need to be done before I should consider cam specs?
I have rest of engine/ car built or ready to assemble.
444 cube, 65 galaxie, built c4, 2800 converter, 3.89 diff.
Heavy car, tough street certainly not a daily driver.

Head flow numbers are very important as well as port volume and valve sizes.  You will need to know the exact compression ratio as well.   There would also be a difference in cam specs if you go with a plenum type situation, or if you do go with an individual runner setup. 

With a 2800 stall, you can't get too carried away with duration.   Are you willing to change that, or are you willing to keep the rpms down?  If you're willing to keep the rpms down, then I would skip the risk of a solid roller and go for a hydraulic roller.   Hydraulic rollers and FE's don't have a good relationship with each other and unless your engine builder or cam grinder has an extensive experience history with that combination, it will be difficult to nail the camshaft down. 

[Tommy-T]

How about my Hillbilly Split Dominators?

Nothing even remotely modern here, an M/T cross ram with 4 Holley 4412 500 cfm 2 barrels. Yes I know they're not Dominators, but at 500 cfm each you can kind'a sort'a think of them that way after a couple beers.

[Tobbemek]

Cant wait to see the air cleaner, really cool love it ,ha cfm this and cfm that, only numbers thats counts is the one you looking for on bottles and cans ;)with one eye shut,helps focusing

[fastback 427]

Haha, thats cool!!!

[funsummer]

Measured the carbs.
52mm at the smallest area near the booster.
56mm at the throttle plates.

Independent Runner will be plan A
Plan B might be Jays New Billet runner manifold with a tri power setup or conventional prostock split dominators.
Plan A sounds more interesting but a lot more challenging.
Plan B with TRI POWER be so cool.