Dyno Mule to Test 351C Intakes on the Intake Adapter, Carb and EFI

[machoneman]

Go Strip Dominator, Go!!!!

Hah!

I say....Go Funnelweb Go!

[WConley]

Thanks for that Joe.
So if I understand you correctly there is a kind of a Venturi effect built into the ports. And I'm guessing here that the engine didn't care about the atomized fuel traveling into a larger opening from the manifold to the adapter, in fact it may have atomized the fuel even better?
Sorry if I'm bothering you guys with this, I'm just fascinated.

It's pretty complex stuff, and every engine / head design seems to like a different port cross-section profile.  Several years ago I worked on an advanced DOHC intake port design for a client.  He was pitching the concept to a major German automaker, and he had worked out what the port area had to be at 3 mm intervals.  (He used NASA-level compressible flow software to model what the ideal flow should be...)

The thing was incredibly hard to develop in CAD, and in the end the profile looked a bit like a rocket nozzle.  The neck-down occurs just before the dividing wall for the individual intake runners.  Apparently the thing flows like hell and he patented it:

[fekbmax]

WConley,
Sent you a PM.

[bsprowl]

Question: How well do the Offy Tunnel Ram ports match up?  Are they better or worse than the Weiand?

[427Fastback]

Pretty interesting data..I have both the performer air gap and the 4V torker..I had already planned to run the air gap as the primary intake but swapping the two will be interesting...I have a road car.High rpm stuff is short and sweet and not that often.It spends a lot of time between 3500 and 4500 rpm...Should be interesting...

Thanks for all the work...

[Dumpling]

Willing to provide a Holley Scorpion, Bud Moore boxram, and a BXR efi intake (with adapter to fit 351C heads), though I'm guessing the 24lb injectors might not support the HP (and the whole intake might just be a giant cork on a large cube engine).  I have a homemade 2x4 top for the boxram, which, based on the findings posted above about single vs double 4v's on tunnelrams, might be the good choice.

Let me know.

The old PSE Black Widow setup came with either a Weiand tunnelram center or a Torker center;  seems Paul knew a little something :-)

I also have a 1x4 top for the Weiand tunnelram if you want to verify the same results you found with the Offy.

[jayb]

Thanks for the offer; PM sent.

[mbrunson427]

The thing was incredibly hard to develop in CAD, and in the end the profile looked a bit like a rocket nozzle. 

It's very interesting that you say this! I was walking around SEMA with an engine builder friend of my family's trying to soak in some of his knowledge. I only see him once every 3 or 4 years and every time he's around I learn something new and cool. He told me that his best performing intake and exhaust designs have been something of a rocket nozzle. Of course he's not figuring all of this out with a computer program, he's figured it out with 35-40 years of grinding on metal haha

[Joe-JDC]

Willing to provide a Holley Scorpion, Bud Moore boxram, and a BXR efi intake (with adapter to fit 351C heads), though I'm guessing the 24lb injectors might not support the HP (and the whole intake might just be a giant cork on a large cube engine).  I have a homemade 2x4 top for the boxram, which, based on the findings posted above about single vs double 4v's on tunnelrams, might be the good choice.

Let me know.

The old PSE Black Widow setup came with either a Weiand tunnelram center or a Torker center;  seems Paul knew a little something :-)

I also have a 1x4 top for the Weiand tunnelram if you want to verify the same results you found with the Offy.

  Jay, the Torker that I sent you came off a PSE adapter, so you don't need to pay for shipping of another one.  Joe-JDC

[blykins]

Dumpling, can you post a picture of your 2x4 top for the Bud Moore intake?

[Dumpling]

Trying, but the photo "failed site security checks.  See administrator". Or something like that.

[jayb]

That's weird, I don't know what would have caused that...

[blykins]

You can email it to me, I'll get it here.

brent@lykinsmotorsports.com

[jayb]

Just a quick update on this project; unfortunately I am delayed until next weekend to finish the carb testing, due to a health issue.  I think a lot of folks were looking forward to these results (for heaven's sake, there has been CHEERING for a couple of the manifolds LOL!), so I apologize for the short delay, but it can't be helped.  When I resume, hopefully next Saturday, I will be testing (and in some cases re-testing) the following carbed intakes:

- Holley Strip Dominator with 1000 HP carb (this manifold has now been cut to allow fitment on the engine, so testing will be with crankcase vacuum).
- Holley Strip Dominator with 1150 Dominator carb and Super Sucker 4150 to 4500 Adapter (Super Sucker courtesy of Brent Lykins).
- Parker Funnel Web with 1000 HP carb
- Parker Funnel Web with 1150 Dominator carb and Super Sucker 4150 to 4500 Adapter
- Edelbrock Torker with 1000 HP carb
- Edelbrock Torker with 1150 Dominator carb and Super Sucker 4150 to 4500 Adapter
- Edelbrock Torker with plenum divider welded in, with Holley 1000 HP carb (courtesy of Joe Craine)
- Offy Port-O-Sonic with 1000 HP carb (manifold courtesy of Kevin Rolph)
- Offy Port-O-Sonic with 1150 Dominator carb and Super Sucker 4150 to 4500 Adapter
- Offy tunnel ram with single 4 top, and with 1150 Dominator carb and Super Sucker 4150 to 4500 Adapter

I think with as easy as it is to change intakes with the adapter, I should be able to get this all done in a day, and the writeup done the day after, so with luck next Sunday night I'll post a bunch of new data.

After this I will get Joe Craine's Trick Flow EFI intakes set up to run early the following week, and then I will try to run my 3D printed version of the billet intake I designed.  That will be interesting...

There are also a few other intakes that others have volunteered to lend me for testing, and I will sneak those in as they become available.  Thanks, Jay

[fekbmax]

when you test your 3D intake will you be testing it with carbs as well as TB/EFI ?