Got My Offy Intake!
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Postmaster
Joined: Nov 2012
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From: Langley, BC
Got My Offy Intake!
I came home from my camping trip to have my new 300 manifold waiting for me. It looks even better in person! The casting quality is excellent and seems solidly built. The flat surfaces appear to have been properly machined flat which is of course a good thing. My complaint though is that the casting on the intake runners is all very rough, as if someone sand blasted the pieces and never got rid of the left over sand. The intake runners will definitely need to be cleaned up.
It'll be sitting in my garage for a few months so if anyone needs any pictures of anything, I'm happy to provide.
Here it is mocked up to my Holley 350 and my 240 head which I have yet to have refurbished.
It'll be sitting in my garage for a few months so if anyone needs any pictures of anything, I'm happy to provide.
Here it is mocked up to my Holley 350 and my 240 head which I have yet to have refurbished.
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Postmaster
Joined: Nov 2012
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From: Langley, BC
You don't think I'd see any benefit to smoothing out the intake?
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Postmaster
Joined: Nov 2012
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From: Langley, BC
Well that makes my life easy. I'm okay with not spending hours grinding away. I'm curious though as to what exactly makes the turbulence beneficial?
Bathroom scale reads 9lb.
Bathroom scale reads 9lb.
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Joined: Mar 2005
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From: Earth
The turbulence helps keeps the fuel mixed with air. With multiport EFI the intake runners can be mirror smooth with no worries since it's only moving air and fuel is being sprayed directly at the back of the intake valve.
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Joined: Mar 2014
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what's the stock weight!? lol i know.. i have issues..
um. idk. smart guys say this stuff.
Cylinder head porting - Wikipedia, the free encyclopedia
um. idk. smart guys say this stuff.
Cylinder head porting - Wikipedia, the free encyclopedia
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Joined: Nov 2012
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From: Langley, BC
If you're okay with waiting almost three months until I pull apart my truck, I can tell you. That's when my insurance is up and since I failed emissions I can't re-insure the truck, so I figure I'll use it as an excuse to throw some ponies at the engine.
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From: Langley, BC
Slightly relevant, but the chrome looked pretty jank on my carburetor adapter so I stripped it off. I'll get it powdercoated black and then mill it at work. I hate chrome engines so this worked out in my favour regardless. When I bought the thing I was expecting an as-cast finish.
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From: Boise, Idaho
A little bit of roughness causes enough turbulence to dislodge any pooling fuel and flush it on down the intake and into the head.
Something like that, I can't remember the exact specifics.
Looks like a nice setup though!
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From: Langley, BC
That's reassuring. I must repeat myself when I say that the quality of the manifold is top notch. We do a lot of aluminum casting at work and the Offy intake seems to be of a higher quality than what we do.
Since you seem to know what you're talking about, I have a question. How should I route the vacuum hoses? There are two inlets on the intake and one at the base of the carburetor. One on the intake will be reserved for my transmission but I don't know which inlet to use for my DUI distributor. I don't have any power accessories. Manual steering and brakes.
Since you seem to know what you're talking about, I have a question. How should I route the vacuum hoses? There are two inlets on the intake and one at the base of the carburetor. One on the intake will be reserved for my transmission but I don't know which inlet to use for my DUI distributor. I don't have any power accessories. Manual steering and brakes.