WTB Dauntless 4 Barrel Manifold

Hello from Redding California. I'm interested in a 225 Offenhauser 4 barrel intake manifold if anyone has one for sale. Let me know whats available and let's see if we can make a deal. Thank you for reading this.

 

There are a couple Offy versions of these manifolds. There is a “360” dual plane, and a dual port version. There are also manifolds made by Holley and Kenne Bell too.
These are made for many generations of the Buick V6, including 198, 225, 231 odd and even fire. These are specific to the engine, so check part numbers carefully. I might find my list of part numbers for the various applications.
-Donny

 

I'm not really familiar with these manifolds (YET). I don't have any experience with the dual port manifolds. If the 360 is a dual plane I would expect it be a good choice for low or lower RPM use. With literally zero drive time on my jeep I would expect it should not be revved over 4000 RPM very often if not at all.

 

The offenhauser ofy-5713 is shown on Summits web site though the picture is not correct. This is the 360 dual-plane.
I would not recommend the dual-port in my experience. Still working to to get it running to my satisfaction. Could
be the carb, manifold or me. I have the "C" version to try and would use it if I go to EFI as it is an open plenum design.
Good luck find any other four barrel manifolds unless someone has one on this site.

 

I was reading holley supposedly made one in the day too. I guess my option is to see if anything pops up here or it's $600-800ish new. I've got a couple of co workers that are jeep nuts. I will have to see if they have anything tucked away as they are v8 powered cj5s now.

It would be pretty neat if there was few readily available options out there.

 

There are 2 types of Offenhauser intakes for the 225.
1st type is a dual plane single port. This intake looks like the typical aftermarket intake and works well with 2bbl and 4bbl carbs.
2nd type is a dual plane dual port. This intake will have a split intake runner that is visible from the head to intake mating surface. This intake should only be used with a 4bbl carb.

 

That's good to know. I will definitely be using a small holley 4 barrel most likely a 390. I have a ton of holley tuning parts as well from my racing days. I might even have a 390 out in my shed.

 

Some Offy 4bbl part numbers I have for the 225 are:
#5713 w/AFB carb pattern
#5714 w/Q-Jet carb pattern
#6035DP
#6172-C
There may be others
-Donny

 

This is turning complicated in a hurry and is about the craziest set up I've owned.

 

An option would be to stick with the 2-barrel manifold and go to fuel injection. With the price of a new carb and manifold you
would be be almost there. There is no real advantage to having a four-barrel. You could also use a 2-barrel of some flavor.

 

It probably sounds dumb but this weird v6 already has me out of my comfort zone. I guess my thoughts are make it more something I'm familiar with. I taught myself to tune holley carbs with a tunnel ram and dual holley carbs. I got good at it and even better when there is only one carb vs two. I then stepped it up to a supercharged application. I know zero about fuel injection but I would think get it dialed in and it should run itself. Maybe I'm too fixated on trying to make it familiar to me than learn something new. If fuel injection is the way I would be curious about who makes a compatible kit for the oddfire?

 

https://howellefi.com/product/hb225-225-cid-buick-tbi-conversion-kit/

 

There is a dauntless group on fb you might try

 

I guess I need to look into this more.

I'm not super good with fb but I will look into it. I'm actually horrible with face book.

 

Holley made a Street Dominator for the 225.
Split plenum but single plane.

 

I've ran single planes on the street with great success. Single plane on a v6 jeep with a probably stock engine doesn't sound like a super good combo to me. Please tell me if I'm wrong.

 

As long as you're not looking for maximum horsepower, the factory 2g carb works great. Starts when you touch the key, gets decent mileage, works great offroad. I would start by rebuilding the original carb and seeing what you think.

 

If we are going to talk maximum horsepower I would be back to my original thoughts and ditch the v6 for a sbc. I don't want this to be boring but I'm not trying to squeeze everything I can out of it either. Like I mentioned earlier this just had a lot of parts that are out of my usual comfort zone. I want a good street/mild off road combo that works great. I did find a 4 barrel intake on a face book market place ad. It's farther away than I want to drive but close enough I could do it in a day. I sent the seller a message to see if they would be willing to ship. I'm sure they ignored me and figured I was a scammer since I haven't received a response.

I guess I should probably look into the FI kit. I got home from work and was digging through my carb collection in my shed and didn't find any good stuff for this application. Still have some bigger DPs but too much for a little low rpm jeep motor. So throwing a carb on it for the cost of a rebuild kit is now out the window as well.

 

Jmho , a 4 barrel on these Jeeps is useless.. 06 seconds on the secondaries and you'll be shifting. Fuel economy will plummet even more and the proverbial can of worms.
I've had all the go fast parts, now very happy back with my 2G and mild cam.

 

It seems like from what I'm reading I hear keep the 2 barrel etc. This is all coming from people with what I would assume have more real world jeep experience than I do.

I also read the v6 is rated at 160 hp. In my opinion that's pretty decent since a lot of the low compression smog dog 350s were rated at around 185 hp. My question is if you were to add a set of headers with decent exhaust, 4 Barrel intake with about a 390-450 carb, say a HEI distributor with a more aggressive set of weights and springs, and go for the aggressive comp cams kit what kind of power/torque increase would you actually see?