Holley 2 barell on 225

I am considering replacing the 2gc on my 67 225 with a Holley 350cfm 2 barell 0-7448 and the Offenhauser 5895 adapter. I searched the threads and can't find any discussion of this so I was wondering if any one has tried this and how did it work? I have Novack headers and 2 1/4 in. single exhaust running the original route thru a flowmaster out the back. I tried rejetting the 2gc but it just falls on it's face when you hit it.

 

The Motorcraft 2100 or 2150 is a better carburetor on the trail. I would not choose a Holley 2V.

IMO there's no good reason to adapt a 2V Holley to a 4V manifold - instead, use a 4V Holley. Others have used the 470 TA or the 390 Holleys on the 225 with some success. But all these Holleys have their issues compared to the 2100 or your 2GC.

I would not blame the 2GC - it sounds like you have too small a pump shot, or a big vacuum leak, or a similar problem. You could get better performance with a bigger carb, but now you have drivability problems. There's a lot to tuning carburetors, and I think you are simply rolling the dice if you think you will fix the problems by substituting another carburetor. If you are not capable of getting the 2GC to run right, it is unlikely you will be capable of making another carburetor work in its place.

 

Good advice from Tim...the 7448 uses a center hung float, which works great on the street but is terrible off road.

 

Yeah a good 2G is a great carb.. May not be a powerhouse if you have a hot motor, but in stock form it's hard to beat.

 

I have the 225 and the offy intake with the holley 4160/ 8007 carb. I drive it mostly on road. Its fantastic in every way. I bought it new. The electric choke works fine and after i got past the initial set up and other issues, it has been a GREAT carb for what I do.

All that being said, before you buy a new carb, you need to check timing, new plugs, wires and points if you are using them. Do all that first and make sure its not another component other than your carb causing this issue.

 

Yep, the 2GC is a decent carb and works well off-road but like Tim and Doug stated above, if replacing, there isn't any benefit from the proposed Holley and it absolutely will not perform as well as the 2GC off-road. There is no way to make any Holley center pivot bowl to adequately work off road and believe me, I tried. As Tim alluded to, you will get better low end response (and better economy) from a small 4 bbl and it is worth the bucks to find a dual plane manifold for one. IMO, the best 225 option is to get the 390 cfm Holley and buy the spring loaded need/seats used in the TA versions along with the connected or extended bowl vents. My mileage went up about 2 mpg with a small Holley 4bbl as compared to the 2GC.

 

We've seen a lot of posts about the 2G falling flat. It happened to me but self corrected so I never figured out what the problem was.
Many have posted that it could be: 1) need to clean the carb 2) the small balls inside the carb could be stuck, missing or misplaced or 3) could be a bad accelerator pump even if it's new. Or 4) nothing to do with the carb but a vacuum leak.

I would add that you should check or just replace the small filter in the carb where the fuel line connects to the carb.

If you definitively figure out what the problem was, please post it.

Note that I'm with the others on keeping the 2G rather than starting over with a different carb unless you don't go off road and you don't need it to run at steep angles.

 

I'm running the MC 2100 on my offy intake. I couldn't be happier. I haven't had it in the woods yet, but my property has about a 100' tall hill that is too steep to drive up in 2wd. 4 Low and the MC2100 pulls it right up.

 

First, Thanks for all the replys, I don't post much here but read a lot and a lot of my Jeep came from here or sites like Warlock's. I've had the 2gc apart and rebuilt several times. Played with different jet sizes, ect. I will look for a vacuum leak I may have missed. Pump seems ok. Significant shot. I feel I am beating a dead horse. The Offfy 5895 is an adapter to the stock 225 manifold not a 4bl manifold. Holley 2bl and adapter $400. Offy and Holley 4 bl $800. Not going there. I don't do much high angle 4 wheeling. Mostly on road or wood's riding on property. I call it my road legal side by side with a big winch which mostly makes trees fall in the right direction. Again thanks.

 

If you insist on a replacement carb, this guy is well regarded - http://www.ebay.com/itm/Motorcraft-...08-venturis-/321773759247?hash=item4aeb35eb0f - I believe he will make a kit for the 225. Would include the adapter.

Don't buy a Holley 2300 2V for a Jeep application. If you want a 2V, use the 2100 or 2150. Unless modified, the Holleys have some angles that they simply refuse to run at. And they are quite susceptible to bouncing, ie bounce and stall. BTDT. You can add a bunch of parts to a 2300 center-pivot-float carb to make it work better, but the 2100 or 2150 does not need any mods. And the factory 2100 is plenty of carburetor for a 225, and they are simple and reliable.

 

Just to clarify, the Motorcraft and Holley share the same bolt pattern, so the adapter would work for either carb.

 

That helps. I sent a mesage to the ebay guy to see if he had a kit for a 225. The adapter may be an issue as Summit lists a Sep. delivery. Exeter Auto in Calif. lists them also. Thanks again guys. It sounds like the general opinion is the Holleys suck, literally.

 

Now I'm learning more on the 2100s. They come in different sizes? Sounds like the 1.08 would be best on the 225. Opinions? Lots of info on putting them on the 258 in line.

 

I'm running the 1.08

 

Clearly. The larger venturi carbs would work, but the 1.08" would be your first choice.

 

Thanks to the great advice (I hope) I purchased a 2100 1.08 from ehrmann (Gronk Performance) thru ebay. He says the same kit works for the 258 and the 225. He wanted pics of my 2gc so he could set up the linkage the same. He will also switch it to a manual choke, just used to it. I'll update when I get it installed.

 

OK so I took your advice and bought the 2100 from Gronk Performance. So far very happy. Several emails back and forth before purchase and EVERYTHING I needed in one box. He sent an email with attachments of instructions and videos. All went very smoothly. Runs good, doesn't stumble. Power about the same but I wasn't looking for an increase. Mileage unknown. Thanks guys for the great advise. I'm trying to attach pics.

 

At the bottom under posting permissions it says I may not post attachments???

 

You need to put your pictures on another picture hosting site like photo bucket, then copy and paste the URL into your reply. See below.

You have me thinking of trying a 2100 now. Fairly happy with my Holley but, interested to compare. I have a stumble just off idle that I can't find, get rid of.

http://www.earlycj5.net/forums/showthread.php?78830-Posting-photos