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Offenhauser Intake

Posted By: Anonymous

Offenhauser Intake - 04/09/11 02:23 PM

A coworker has an offenhauser 360 single carb intake manifold that will fit my 440. No carb comes with it. Are these intakes any good? What are the characteristics it has. Will my old AFB work with it? I could probably get it for $75 or so.
Posted By: dOc !

Re: Offenhauser Intake - 04/09/11 02:33 PM

REALLY old-school stuff .... save yurr money, skip this one, add a couple of bucks to the purchase and get a Street Dominator.
Posted By: racealittle

Re: Offenhauser Intake - 04/09/11 02:53 PM

Quote:

REALLY old-school stuff .... save yurr money, skip this one, add a couple of bucks to the purchase and get a Street Dominator.



I kind of agree with Doc on this one. Without seeing which one (there are a few choices available), it's hard to give good advise.

If you want it for the look, the nostalgia, go for it.

I owned and drove two different Offy intakes that were available, way back then. The Offy dual port that required a Thermoquad was very torquey off the line and had good throttle response, but at the track the Holley SD and Holley carb was about a second better for me.

The other Offy that was turle like and had a divider down the middle only (essentially making it two single planes divided down the middle), worked well on a car I bought, but I never track tested it.

I was always able to sell those Offy intakes for a good dollar to really old shool guys who just loved them. The Dual Port was sold for $400 25 years ago, here in Canada.
Posted By: RapidRobert

Re: Offenhauser Intake - 04/09/11 03:07 PM

If it's a dual plane and a DP fits your app (& I'm assuming it will as a dual plane fits most intended uses) then it'll b fine. As said not the perfect choice but money is tight and I'd approach him w (3) 20's in hand
Posted By: Anonymous

Re: Offenhauser Intake - 04/09/11 09:42 PM

Thanks fellas, it has two seperate ports per intake runner and the primaries are seperated from the secondaries at the carb base. I'm not racing the car so I'm looking for appearance but not at the cost of everyday driving. He told me to make him an offer but he is a coworker and friend so I don't want to rob him. I see new equivalent ones go for around $400, I saw a used one on racing junk for $250. I will tell him he would probably be money ahead selling it online before I offer him the cash. The 440 is a first year from a New Yorker and has the factory cast 4 barrel intake on it. I have a mid 60's AFB which I have been using and which would save me a ton of cash if I could keep using it.
Posted By: RapidRobert

Re: Offenhauser Intake - 04/09/11 10:46 PM

Quote:

The 440 is a first year from a New Yorker and has the factory cast 4 barrel intake on it. I have a mid 60's AFB which I have been using and which would save me a ton of cash if I could keep using it.

What prob are you having that's making you want to do some swapping
Posted By: Anonymous

Re: Offenhauser Intake - 04/09/11 11:18 PM

No problems, the engine is needing a rebuild but it's sitting on a stand while I complete my never ending car resto. The AFB I have came from an old poly 4 barrel intake and I used it on the 440 just for a couple months before I commenced the car resto 4 years ago.
Posted By: gch

Re: Offenhauser Intake - 04/09/11 11:38 PM

That old afb is likely costing you as much hp as the flat intake.Too small for performance.Just fine for cruising.
Posted By: racealittle

Re: Offenhauser Intake - 04/10/11 12:49 AM

Quote:

Thanks fellas, it has two seperate ports per intake runner and the primaries are seperated from the secondaries at the carb base. I'm not racing the car so I'm looking for appearance but not at the cost of everyday driving. He told me to make him an offer but he is a coworker and friend so I don't want to rob him. I see new equivalent ones go for around $400, I saw a used one on racing junk for $250. I will tell him he would probably be money ahead selling it online before I offer him the cash. The 440 is a first year from a New Yorker and has the factory cast 4 barrel intake on it. I have a mid 60's AFB which I have been using and which would save me a ton of cash if I could keep using it.



Sounds like an Offy Dual Port. The theory is a high velocity primary in half of the intake runner, and the full punch from the secondaries filling in the rest of the runner volume.

That is the intake I sold for $400. It was torquey as hell, but I just could not tune the TQ for more power than the 850 Holley dp. If my offy was a square bore intake, I would have likely kept it.

$400 was a lot of money back in those days. That intake cost over $500 CDN back in those days.
Posted By: DusterKrazy

Re: Offenhauser Intake - 04/10/11 12:49 AM

I run the Offy and think it works well
Posted By: Challenger 1

Re: Offenhauser Intake - 04/10/11 01:33 AM

I've run a Offy in the past on a SB, mine ran real well.

I like em, old or not.
Posted By: 2Bad360sfromNC

Re: Offenhauser Intake - 04/10/11 02:03 AM

I have a small block Offy laying around. I wonder if it'd be worth putting it on my 360--currently just have an Edelbrock Performer on it.
Posted By: dOc !

Re: Offenhauser Intake - 04/10/11 02:15 AM

Quote:



Sounds like an Offy Dual Port. The theory is a high velocity primary in half of the intake runner, and the full punch from the secondaries filling in the rest of the runner volume.

$400 was a lot of money back in those days. That intake cost over $500 CDN back in those days.



That Offy DP .... never ran one me-self but a bud did. Ran good except when he got into the secondaires. VERY restrictive inside that manifold. That intake must have been a horror show casting up...

4-5 huN beans ? ... DAMN

I am not familiar with the time-line .. but it was probably the same years that Eddy came out with the Streetmaster. That is a muchO bester intake than the Offy DP.
Posted By: RapidRobert

Re: Offenhauser Intake - 04/10/11 03:04 PM

Quote:

Eddy came out with the Streetmaster. That is a muchO bester intake than the Offy DP.

Hey thanks Doc, I have a SM & was thinking I wanted to locate a dual port to better my mileage but now I'll forget about that & finding (smelled the gas) & fixing the pinhole leak in my line halfway back to the tank where the Adel clamp rubbed a hole in it has done wonders for my mileage. I dont get frustrated anymore (at least w car probs) but I for the life of me couldn't figure out the prob as the 318, nothing appeared to b out of whack (plugs/wires good, no apparent misfire, eddy 1406 somewhat lean, timing good) the only thing I could come up w was maybe a lean misfire & was wanting to get an Innovate LM-1 to dial it all in but even a misfire could not explain how fast the needle was dropping (and a locked gas cap has always been on there)
Posted By: dOc !

Re: Offenhauser Intake - 04/10/11 03:27 PM

RR ..... so you are talking about the SM for the A engine? I think I have one of those but all I have ever used are the ones for the B and RB.

There are some "dams" in those SM intakes that you have to wonder why they are there. ESPECIALLY the dams in A engine one. There has to be a reason for that because it would have been EZier for Eddy to build them without them.

I will see if I have a pic.
Posted By: RapidRobert

Re: Offenhauser Intake - 04/10/11 03:33 PM

Yes SB, yeah I got a SM on there now w an eddy 1406. It has miniscule ports/plenum but it IS a single plane & that part got me thinking if a swap would benefit
Posted By: dOc !

Re: Offenhauser Intake - 04/10/11 03:38 PM

For a single plane TORQUE intake for a SB in a MPG project .. it has to be good piece.

If I ever built a SB mpg engine ...I think that I would stick-with an SP2P because it takes a TQ carb so EZ.
Posted By: RapidRobert

Re: Offenhauser Intake - 04/10/11 03:44 PM

Well I do have one of the "reverse" adapters to run a spreadbore carb on a square bore intake & if gas hits $5 I'll prob have Demonsizzler prep me a good TQ for the work vehicle
Posted By: dOc !

Re: Offenhauser Intake - 04/10/11 03:51 PM

RR .... do you have a pic of that "throat" of the intake? I think that it is sooo restrictive.

Have you ever thought of prepping the carb yourself ? ... U R a sharp guy ...who could more-than-just-read a FSM.

It would take 10$ a gallon gas for a pay-back from an expense like that ..
Posted By: RapidRobert

Re: Offenhauser Intake - 04/10/11 03:57 PM

Doc I appreciate the vote of confidence. I didn't take a pic but I remem how small they were, you couldn't miss it. Are you saying I had better b sitting down when I ask David for a price . W all the warped bowls etc w them that got me thinking of contacting him
Posted By: dOc !

Re: Offenhauser Intake - 04/10/11 04:02 PM

pic

Attached picture 6578001-318sm.jpg
Posted By: RapidRobert

Re: Offenhauser Intake - 04/10/11 04:04 PM

That b it. EDIT from the straight shot ports the mixture distribution ought to b pretty good. I think an inop heatriser/short trips was hurtin me also
Posted By: racealittle

Re: Offenhauser Intake - 04/10/11 04:42 PM

Quote:

pic

(Picture of the SB eddy streetmaster)

Have you ever installed one of these intakes?

Getting the 4 center bolts in is about as much fun as anyone would ever like to encounter.
Posted By: RapidRobert

Re: Offenhauser Intake - 04/10/11 04:57 PM

Quote:

Have you ever installed one of these intakes? Getting the 4 center bolts in is about as much fun as anyone would ever like to encounter.

Been several years since I did this one but now that you mention it I think I did have to insert those center bolts THEN sit the intake down in the valley & go from there.
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