Now for something completely different ..Part 2
 

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I know,I know that is the same picture from part one's thread. All Holley carbs look the same. The difference is time.. lots of changes.
Part one was my 3.0 engine with 350k miles on it making 150HP, and a Holley 2300 350 CFM Street Advenger that worked great on an old engine.
The 350 CFM carb just could not keep up with the new engine. 3.2ss , CP pistons at 9.75:1 with the spacers removed. CP rods with coated bearings, M1 cam, ported heads, all moving parts DLC coated. (I know the owner of Industrial Hard Coating in Charlotte).
ICARP CIS with adjustable FD making an unknown amount of HP. So why the carb?
I have a quick change set up so I have been running ICARP in the winter and the Holley in the summer. I took a beating from the Karens theist time so I'm back as your heretic whipping boy with Part 2 of a Holley on a Porsche..
It works, you just have to have the right size carb for your engine so as not to keep making radical changes to get what you want. So this time I went to the pro's at CCS Carbs in Virginia Beach and Richard the owner said I was NOT crazy and he had a 911 also and getting the right set up was a 500 CFM 4412 NASCAR set up that he blueprinted. Wow, nice work, the fit and finish of custom machining made set up easy and the 2800 pound car pulls like a turbo.
I will have to bring the car to the East Coast drag weekend this fall when the west coast 911's come to Cecil County drag strip.
But why OLDFART, why?
I live on Hatteras Island and it is a drinking village with a fishing problem, and I don't drink. I let anyone drive the 911 and teach bored kids here on vacation to drive a stick shift car with a light flywheel and the carb starts on the first tooth every time they pop the clutch which can be 100 times a day. If they break it, it needs upgrading.
The rest of part 2 ??? I'm trying to make copies of the Holley/Porsche manifold for you,
as a retired manufacturer I know how to make anything.. It only takes money, how much? I will let you know and I am not into making money. A fast easy cheap induction system to get your car up and running while you D*CK around with your CIS, MFI, Weber's, Megasquirt whatever.. I will not argue about what is better. I sit here and read about everyone's headaches with whatever they are running.
So now I'm laser scanning the manifold and the n some more machine work over the 4th holiday and off to my CAD jockeys then to the laser SLS people to make it out of Aluminum and we will see if I go broke in the mean time..
Flame on Gents .. OLDFART uot.

Carbs are a viable economic alternative, nice to have options!
My partner Ben has made several aluminum throttle body adapters for 911 CIS that retain the OE runners. Those were mostly for turbo conversions but you could certainly plop a carb on there! One of my customers did a Holley Sniper EFI conversion using a similar adapter and that turned out really well.
What exactly are you going to produce, the carb adapter portion of the manifold or an entire manifold with runners? One of the caveats bugging me about running carbs or EFI wet intake systems was the rubber hose connectors. Those need to be fuel resistant.
Looking forward to what you come up with!

Thank you Brian, that is good information, I will call you on Monday. I change the rubber hose connectors every year. This is what I'm going to cut up and make new connectors out of. 1.5"
exhaust hose from marine engines..
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My, oh, my, Old Fart, you should be ASHAMED of yourself for trying so hard to improve 1980's era German perfection! Really, you should. Your approach is approximately 167 degrees apart from mine, and you are most probably going to Hell. But I do await your next installment- Go Get 'Em, and Good Job!!

Great work Tom. I would 3D print the manifold center section, at least for the prototype. I would think about 3D printing the individual intake runners too. The OE rubber boots are fuel resistant--remember, the CSV squirts fuel into the center section. They last a long time. The ones on my car are original.

Go ahead and piss off the Karens!

I have only built 10 Porsche engines in my life so far, and I like Weber's and working on them. I do not have any experience with PMO's, yet..
Getting enough CFM from this Holley 4412 changed everything, the response is instant and the torque is higher than CIS.
Plus the 123dizzy makes changes easy, I plugged in Shane's file..WOW! What go power, no knocking with the M1 cam. I came back after an easy test run and backed off the numbers until I test harder and went out for a blasting run. Thank you Ian and Shane.
I live in a speed trap, The cops know this Porsche and the other one in town that is a 914-6 I built the engine for so testing tune in a resort town is risky.
Having one carb in a center location makes changes easy to read. Parts for Holley are cheap and every where, you just have to check the quality on everything and measure twice.
Fun times..

If you've got an airport see if you can sweet talk your way onto it.

Yes, I do have Billy Mitchell Airport right down the road in Frisco. It is locked up tight and only a one person gate with a key code on it, It is an unattended strip so no personnel or guidance when landing or taking off. Probably have the cops there in 5 minutes. Then being inside the National Park and on FAA federal space would be a Jan6th offense and no one will ever hear from me again..

You would need one person with a radio for incoming traffic. Then you would have to talk the local PD into it. Use the taxiways for your return.

My back door neighbor just got a red Ferrari today? Heard an engine roll in that was new to me and it was not his 3 Corvettes. Now he can be the big dog sucking up the LEO's giving me a break.

The Karen’s ain’t as bad as the Greta’s

How Dare You!

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Oh the heresy continues.. Thank you Shane your tune works great.

I look forward to see what you come up with.

As a life-long North Carolinian, I had no idea that there was a small airport/ landing strip in Hatteras. That thing IS on the beach! How cool. You are in rural paradise, for sure, out there. Love your comments on the Pelican and this Holley intake project. Patrick

Thank you Patrick, I am 75 miles deep in the National park. It has advantages and..
I am remote but I live in Buxton (Mayberry) no traffic lights for 65 miles but lots of traffic, a straight road but only 2 lanes. A Porsche is perfect for passing but I have gotten a ticket for passing too fast?
There is no franchising so no fast food, not many places to eat so you must like to cook, I BBQ every day of the year. The fishing is good but hard core so if you like fishing the river or lake you're not going to catch anything here. You must LOVE the wind 24/7/365 this is the windiest spot in the USA which is why the Wright brothers came here in the first place. Most people leave because they can deal with the wind and weather. Which brings up storms...like you never seen, I am 60 miles out in the ocean from the main land. and what ever you are getting it will be worse when it gets here off shore. Hurricanes? Yeah and Nor'easters that are worse and it blows over 100 MPH here several times a year so the place stays scrubbed pretty clean by natures enema. My garage is set up so all the tools can be put up high and dry, throw the car on the lift and let it flood..
I am MR. Boring and happy as a clam.