proper setup of a weber 32/36 on the straight 6

[serehill]

Yeah I happen to have some 9.5 wires & little re-trim & added new ends to. Good luck with the Weber . You sure you have good fuel delivery? The wiring is almost all cut out. It's not a big deal. You'll get it together in no time. Simple tracing & removal. Replace all tape with electrical tape or shrink wrap. In my opinion 50k is too much 45 k is pushing it. Honestly I've never tried 50k though.

[Mrpatatomoto]

50k's what I thought I read. I haven't checked fuel pressure, Ill go check that.

[Mrpatatomoto]

Right at 6.5 PSI before the regulator very little change when I rev it, never got to 7psi

[ferox]

Got it all wired up and it starts, Didnt fix the problem though, If I floor it it still dies. trying to figure out how to de wire the engine bay if its possible. This sure has been hacked up, ill upload a picture in a few.

Did you ever check your primary and secondary idle jets? If your primary idle jet is too large, as mine was, then it will do exactly what you describe. You just need a standard screwdriver. I have 50s in my Weber and it made all the difference.

[Mrpatatomoto]

jets are 75/170 primary and 60/160 secondary from what ive heard thats what other people are running near sea level up to around 5k

[ferox]

jets are 75/170 primary and 60/160 secondary from what ive heard thats what other people are running near sea level up to around 5k

What you heard? 75 is way too big, but it's up to you. That's what mine came with and it ran like poo. If you do more research you will find that many if not most people are running something close to 50. I tried 45 and it was too lean, 55, 60 , and 65 were too rich. 50 is just about right. Regardless of whether you believe me or what you heard, you should get an assortment of idle jets and determine what works best for your engine and carb. If not, you will likely do a lot more work and spend more money trying to get your engine to overcome the effects of improper jetting which costs a few dollars.

[Mrpatatomoto]

ill give that a shot leave the secondary at 60?

[ferox]

ill give that a shot leave the secondary at 60?

If your top end works good with a 60 I would leave it for now. The primary is going to have the most effect on acceleration in general. Once you get the primary close to figured out, you will notice whether the transition is smooth. If it's not smooth, you will probably want the secondary to be closer to whatever you end up with as the primary. I really wanted to run 50/55, but 50/50 works the best for my engine. The top end is stronger with a 55, but the transition isn't smooth. Since I got the Weber dialed and installed poly bushings and mounts all around the Wag is a towing beast even with 3.31 gears, but I might try swapping out the secondary for a 55 when I tow to see if the added load smooths out the progression. With the 2.73 gears on your rig, you'll be down the road fast once you get the carb dialed in.

Do be careful about going too lean for extended periods of time. There is a guy on the Jeepforum that swears by 45's, which I am sure are good for his engine. When I tried 45's it idled great and I got really good acceleration off the line, but it would not sustain the power because it was too lean. The tell-tale sign is that the temp gauge read higher than normal. With 50's the temp is normal on my rig. So keep an eye on the engine temp. You shouldn't really get into that range until you are below 50, which shouldn't be a huge concern because I doubt you will go that low if your rig is already running alright but non-ideal with a 75. Mine wouldn't even run at all with a 75, so I estimate you will end up somewhere between 55-65 on the primary. Good luck. The difference with proper idle jets is huge and instantaneous, so at least you get immediate satisfaction.

Also, I can neither confirm nor deny this, but the rumor on the interwebs is that Redline-Weber sends these kits out with rich idle jets to avoid the potential for people to run too lean and damage their cylinder head. It would seem that there is enough variation in the needs of individual 258 engines that nailing down the perfect idle jet set-up from the factory is difficult, and that erring on the rich end of the spectrum avoids damage claims.

[Mrpatatomoto]

Im fairly disappointed with redline, ive called them 4 times and left two messages and one email and havent got any response. Wanted to call and see what they said before I went out and bought jets. I guess thats not going to happen. Now to find someone in town that sells them. OReileys doesnt and thats my usual place.

[ferox]

Im fairly disappointed with redline, ive called them 4 times and left two messages and one email and havent got any response. Wanted to call and see what they said before I went out and bought jets. I guess thats not going to happen. Now to find someone in town that sells them. OReileys doesnt and thats my usual place.

Redline is notorious for absolutely horrible customer service. I have called them once years ago and never again. I ordered my jets online. You might try finding a performance shop, some place that builds muscle cars and such if you want to buy them otc. Regular parts stores are probably not going to have anything.

[Mrpatatomoto]

Ours has a decent performance section with holly and edlebrock jets so I was kinda surprised not to see weber, but i expect to have to order them online, I just prefer to have them today instead of next week.

[Mrpatatomoto]

Well, very late response, but Got a hold of weber, talked to them for a couple days while screwing with it and they ended out sending me a selection of jets in varying sizes, Ended out with 80 primary 75 secondary to get rid of the hesitation. Been driving it for about a week and its definitely better than the carter, but I'm not sure it was worth all the trouble and money. In a few weeks im gonna take it to a shop and have them try to tune it better since I bought a MSD box while I was at it. Hopefully that will help some.

[carnuck]

Did you add a fuel pressure regulator yet? They don't like over 4psi fuel that I recall.

[Mrpatatomoto]

yes, set to 3.5 as per the guy I talked to from weber, Also got rid of the return line filter, that seemed to help.

My jeep has 250k on, I assume, the stock motor. but that shouldn't kill the mileage that bad.

[Stuka]

Are you running the stock 1.75" exhaust still? I switched mine to a full 2.5" and it most definitely helped. Probably why I never had to rejet mine.


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[Mrpatatomoto]

Yeah, stock exhaust for now, plan to go bigger soon just cant afford it yet

[miltos68wgoneer]

i have had more luck and better drive-ability with the 38/38. granted i am referring to a chevy 235. but the the carb you are running is what is recommended by most for this engine too. My experience was that there was always a big hesitation and drive ability issues between the the two stages. No matter ho I adjusted and jetted I was dissatisfied with that circuit. I then got the 38/38 and jetted and adjusted, with half the fuss and twice the results, until I never looked back. I know the fuel economy of the 32/36 but remember it came in the PINTO! Trust me the 38/38 is far superior IMHOP. Good luck either way but remember the 32/36 is not the only option.

[ferox]

Ended out with 80 primary 75 secondary to get rid of the hesitation. Been driving it for about a week and its definitely better than the carter, but I'm not sure it was worth all the trouble and money. In a few weeks im gonna take it to a shop and have them try to tune it better since I bought a MSD box while I was at it. Hopefully that will help some.

Thanks for reporting back. That's the largest idle jetting I have heard of on a 258, so I am glad to have that knowledge, and I am sorry if I misdirected you on the sizing. Hopefully the shop can so some fine tuning because I have found the 32/36 to be a worthy little work horse and really torquey off the line. However, I use my wag for utility purposes for the most part. It all depends on what you are looking for, and milto68wgoneer makes a good point about the 38/38. It would be an easy swap now that you have converted to the Weber.

[ferox]

Ended out with 80 primary 75 secondary to get rid of the hesitation... In a few weeks im gonna take it to a shop and have them try to tune it better since I bought a MSD box while I was at it. Hopefully that will help some.

I am interested in hearing how it runs after the tune shop. Also, I am curious as to your idle mix screw, idle speed screw, and timing settings if you don't mind sharing. I might try to get mine to run with larger jetting for more power (especially after a 4.0 l head swap), but I think I would have to tune the idle mix and speed screws off-spec to do so.

[Mrpatatomoto]

Havent gotten it to a shop yet, Ill be sure to post when I do. This is all off memory so i wouldnt set it and leave it without your own fiddling, Idle mixture is 2.5 turns from seating, Idle speed is one turn past seating, Timing is 13*