Spread Bore On Offenhauser?

[RustyRatRod]

Does anyone know of a spread bore adapter that bolts directly to the slant 6 Offenhauser intake manifold? I've looked but cannot seem to find anything. I thought I'd ask before I start modding something.

 

[66fs]

Sounds interesting.

 

[volaredon]

A TQ would be better.....

 

[vitamindart]

I think the Offy intake has 4 small holes that line up with their adapter plate. that being said, that could be modified easy enough.
mine was cut out before I got it.

 

[RustyRatRod]

I think the Offy intake has 4 small holes that line up with their adapter plate. that being said, that could be modified easy enough.
mine was cut out before I got it.

It's the same bolt pattern as the early GM small 4 barrel carburetor. I'll modify what I have if I have to. I wanted a dedicated plate, that way I'd have one for square bore and one for spread bore. I may be able to make what I have work for both.

 

[oldmodlover]

Mr Gasket ( Holley) # 1932 adapter should work l believe.

 

[MOPAROFFICIAL]

What are we doing now?
Trying out poor fuel spread/distribution?

 

[RustyRatRod]

What are we doing now?
Trying out poor fuel spread/distribution?

No, I have a mechanical secondary I wanna try just for kicks. Happens to be a spread bore.

 

[RustyRatRod]

Mr Gasket ( Holley) # 1932 adapter should work l believe.

Nope. That won't bolt to the intake. It'll bolt to the adapter on the intake, but then the hood won't close. I need something that bolts directly to the intake.

 

[MOPAROFFICIAL]

No, I have a mechanical secondary I wanna try just for kicks. Happens to be a spread bore.

Spread bwhores suck on a v8.
Will it be different on a 6 with that intake design is the question..

 

[Bewy]

RRR,
My Offy catalog shows #5270 as the 225/ 4 bbl intake, sq bore mounting carb pad. The Offy #5830 adapter adapts QJ to square bore, fully divided, not open.

 

[Brooks James]

Check out Moroso adapter there was a dyno test somewhere that showed s marked improvement in flow over others

 

[Killer6]

Just hang on there RRR.......

 

[toolmanmike]

Does anyone know of a spread bore adapter that bolts directly to the slant 6 Offenhauser intake manifold? I've looked but cannot seem to find anything. I thought I'd ask before I start modding something.

You running a 170 or a 198? Doing this just for fun?

 

[Killer6]

Says the Member who's obviouosly not on RRR's "following You" list, lol!

 

[Killer6]

Nope. That won't bolt to the intake. It'll bolt to the adapter on the intake, but then the hood won't close. I need something that bolts directly to the intake.

Would that be the same as the Clifford base pattern?

 

[Killer6]

 

[Killer6]

 

[Killer6]

These I purchased from another Rusty on .org, and were part of Bob Stepp's collection of parts. Appears to be a modded std spread-to-square 'dapter, needs a little professional "refinement" to line-up w/base screws, & a little work w/a spot-face/end mill to finish for some allen-head screws. Placed over other for reference.

 

[MOPAROFFICIAL]

Follows n likes...


Some need that to feel special.

 

[Killer6]

Follows n likes...


Some need that to feel special.

???

 

[Killer6]

Anyway RRR, if that's the same base pattern, You're welcome to this half finished cadapter for the postage. I sure ain't gonna use it....

 

[RustyRatRod]

RRR,
My Offy catalog shows #5270 as the 225/ 4 bbl intake, sq bore mounting carb pad. The Offy #5830 adapter adapts QJ to square bore, fully divided, not open.

That's the issue. I don't have room to keep stacking adapters.

 

[RustyRatRod]

These I purchased from another Rusty on .org, and were part of Bob Stepp's collection of parts. Appears to be a modded std spread-to-square 'dapter, needs a little professional "refinement" to line-up w/base screws, & a little work w/a spot-face/end mill to finish for some allen-head screws. Placed over other for reference.

Now that has possibilities.

 

[RustyRatRod]

Would that be the same as the Clifford base pattern?

Correct.