mystery manifold

charger66 · Regular Joined: 28 Oct 2009 Posts: 71 Report to Moderator

I took this off of a 1948 B.....I suspect it's a heisler although i've seen photos of johnsons and heislers but I don't recall ever seeing slotted holes?

Is this for certain a heisler?

thanks

"infected"

Josh Blackburn · Posted: Tue Dec 25, 2012 8:11 am Post subject: Re: mystery manifold

It looks heisler to me. Slotted holes are to fit earlier heads. It looks pitted bad but should of been a part number on exhaust in the middle by where the intake meets exhaust part. I'm almost positive there were two heisler manifolds. One for 34-40 with smaller port and also the bolt holes pertruded into intake runner and 41-52. Maybe someone can correct me?

WTW · Posted: Tue Dec 25, 2012 8:43 am Post subject: Re: mystery manifold

Josh Is correct. It is a Late B Heisler manifold. Used on 39 through 46 models. The previous Heisler manifold used on the 35-40 models was/looked exactly the same only difference was the exhaust flange was turned 90 degrees. DW

charger66 · Regular Joined: 28 Oct 2009 Posts: 71 Report to Moderator

Thanks,

the exhaust is SO large and open i'm wondering if this manifold would work decent on a stock late B? Or wil the huge exhaust size actually do more harm than good? Obviously the intake side is substantially improved.

"infected"

BushogPapa · Posted: Tue Dec 25, 2012 2:28 pm Post subject: Re: mystery manifold

Remember, this IS a "HOT" Manifold, intended for "All-Fuel" use...

It will need a great deal of Port-Matching and that Inlet is not very large...

Among other things, you should want a "Cold" Manifold, for maximum power, without a tendency to Detonate..

Ron..

48farmall · Posted: Wed Dec 26, 2012 7:59 am Post subject: Re: mystery manifold

I'll help muddy the waters a little...

I have a manifold identical to that, came on my unstyled B. I believe it is a Heisler manifold, it is a cold or gas manifold, or as cold as they came at that time. The runner is tiny, I drilled mine out. On the bottom of the intake runner, it has a pad with "UNB-1" stamped in it. Never made any sense to me as the exhaust flange is the wrong direction for an unstyled B.

gtx1967jewison · Posted: Wed Dec 26, 2012 6:38 pm Post subject: Re: mystery manifold

Some company called "indian" also made manifolds for these, according to Duane Larson (documented), but he has no pictures of them. ..

charger66 · Regular Joined: 28 Oct 2009 Posts: 71 Report to Moderator

This manifold is for sale if anyone is interested?

"Infected"

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