Offy intake

[Anonymous]

How do the Offenhauser tri-power intakes hook up to the head? Do you machine the top off the log? Is it a whole new head assembly?

Those things are pretty damned cool!

Jim

 

[ski4evr]

Here is Slades Offy install info:

http://www.kastang.net/offenhausermod.html

There are set up's for the early small log heads and ones for the later big log heads. One source is http://cliffordperformance.com

ski

 

[Anonymous]

I was looking at the ones on the Clifford site yesterday, trying to figure out how they hooked up to the intake. I even went digging around the site for installation instructions to no avail.

Thanks for the links. I love this site.

Jim

 

[CobraSix]

Jim,

Those modifications probably took me about 10 hours total to do, and that was because my battery for my cheapo cordless drill (i've since upgraded my tools) died every 5 minutes.

The harder part of the modification was the installation and setting up of fuel lines, throttle linkage, etc. But that will only take about a day of tinkering and a day in the hardware store. I literally took my head and intake into the local NAPA and just sat by all the fittings and tried them all until I had a complete working set up. I took it to the counter, the guy looked at it, and said "Just bring the car back when you get it set up. I've gotta see this. It'll be worth the parts we give you."

Slade

 

[Anonymous]

It shouldn't be that long of a procedure for me. I've got air tool (die grinder, right angle grinders, really big grinders) and all the other stuff we use for fabrication. As for the fuel lines, etc....naw, not too hard. We've got tubing benders, and lots of coffee.

I'm thinking about a 2 carb setup, but the 3 carb sure does look cool, so it may still win.

 

[Soldmy66]

I just mentioned this on another thread - dual direct mounted progressive 2 barrels seem like a perfect solution. Do you agree?

 

[Anonymous]

I think there are a lot of possible solutions here, based on what one wants from the engine.

In my case I'll be looking for a nice streetable setup, with a little punch at the top end, plus, I'll be using this car for a lot of highway driving too. So, I figure that I might be better off with a single 2 barrel setup, or 2 single barrel units, with a very minor progressive linkage.

I'd go with the 3 singles almost entirely based on the cool factor, but there do seem to be some questions regarding drivability, and maintenance.

If you're thinking about dual 2 barrel, why not find an appropriate 4 barrel for the application. The adjustability of Holley 4 barrels, especially the 4150 series with a jetted, mechanical secondary plate leaves very little to be desired, except of course the cool factor. You can also take a 4160, vacuum secondary and convert the plate to a jetted one.

There is just something appealing to me about 1 barrel carbs for some reason, and I think that's why I liked the triple setup, although now that I've seen what's involved, I'd probably just build my own adaptor and linkages.

Jim

 

[Junk-Falcon]

it seem

 

[AzCoupe]

Been meaning to post these pics for a while. One of our members sent me these photo's. He didn't want to go with the Offy setup, so he grafted twin SU carbs to a log head. Looks sweet and he said it runs like a champ. Cool idea IMO. Just food for thought, and probably much cheaper than the Offy setup. Click on the images.

 

[Anonymous]

Very cool setup there! Did he run the linkages sychronized or progressive? It's kind of hard to tell from those pics.

I did find out tonight that I can keep my AOD tranny after switching to the new engine. The reason I thought I might not be able to do this is that the Holley site mentioned that the 2 barrel carbs weren't able to work with an AOD. I had forgotten that I have a Lokar AOD adaptor cable that will hook up to any carb! Oops.

Jim

 

[CobraSix]

If you're thinking about dual 2 barrel, why not find an appropriate 4 barrel for the application. The adjustability of Holley 4 barrels, especially the 4150 series with a jetted, mechanical secondary plate leaves very little to be desired, except of course the cool factor. You can also take a 4160, vacuum secondary and convert the plate to a jetted one.

I think the advantage of dual 2Vs over the single 4V is the log. With dual 2Vs, you can distribute the fuel more evenly by placing one carb over #2 intake and the other over #5 intake.

With a single 4V on the log, you will still have the universal Log head problem...#1 and #6 fuel starvation.

I think those carbs in those pictures are syncronized.

Slade

Slade