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summit brand carbs
- Thread starter SELLERSRODSHOP
- Start date
apollard
Active Member
Yes. Love it, some of the best money I've spent on the car. No issues with the carb at all. Idles great, ran great out of the box. From the plugs, I doubt there's much to be gained from tuning for my app. When I drop the roller block, I'm sure I'll need to tweak it, but I am very happy with it. I messed up the chrome on the feed line tightening them down wrong, but I understand that is common with all feed lines.
I need a larger carb for the boat, and if they had a marine 850, I'd buy it in a heartbeat.
I need a larger carb for the boat, and if they had a marine 850, I'd buy it in a heartbeat.
I'm using their 750 vacuum secondary (which I converted from elec to manual choke). It's a bit large & rich for me now (351) but it'll be fine once I rebuild the engine & pump it up. Since it's a bit large, a friend came over and helped tweak the a/f mixture with a vacuum gauge & adjusted the timing. It runs great, fires right up. I never have to worry about fuel leaking from a bowl gasket (Holley) and it's very adjustable.
I'm using a different fuel inlet (Summit unit which I modified to fit) and routed the PCv to a port on the rear instead of the one on the front.
I'm using a different fuel inlet (Summit unit which I modified to fit) and routed the PCv to a port on the rear instead of the one on the front.
Last edited by a moderator:
Sacbill
Hard Swinger
I think it might be over-jetted on the primaries for a mildly-modified small block (like mine). I've gotten it tuned up pretty well, but I want to play with it a bit more as it just seems a bit too rich.
I recently purchased one and I had problems from the beginning. They sent me a bad metal fuel which they replaced with no problems. Then when I got it running, it would hesitate off the line. I changed the jets and I still the same problem. Next I took to my holley friend and he messed with it and couldn't get it not to hesitate. So I decided to send it back and get a new edelbrock. They probably sent me bad one but I decided to go back with an edelbrock since it's my daily driver.
I liked the carb and all the adjustablity. The dvd that they send with it was very helpful.
I liked the carb and all the adjustablity. The dvd that they send with it was very helpful.
Neglected68
Member
I love mine - after years of messing with my autolite 2100, I put the 600 cfm model on a weiand stealth. I never realized that mustangs were not supposed to hesitate and stall constantly!
bravenrace
Member
Aren't these the same carbs as Holley came out with several years ago, and then discontinued? I think they were called the 4011, or something like that?
I thought I heard Summit carbs are roughly patterned on the Autolite 4100 but I do recall hearing about a Holley design too.
Sluggo
Active Member
Re: Re: summit brand carbs
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Holly bought the rights for the 4100 from what I understand, then reworked it. Their version was not too good. Summit got ahold of it and went back through it and made many improvements. I like mine a lot."bravenrace" said:
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bravenrace
Member
Summit doesn't do anything except buy and sell. They may have worked a deal with Holley to provide an updated version, but they didn't do it themselves.
"bravenrace" said:
Well, watching the DVD that accompanied the carb, they seemend to make it clear their own R&D dept was behind the update. I'll have to watch it again.
I think everyone is probably right as to how it came to be. Summit probably did have input on the changes they wanted to see made and they probably did get the actual manufacturer to make them. Why does it matter how if the new carb is better anyway?"SAC69" said:
Sluggo
Active Member
"Horseplay" said:
It's all about being right, and I am. :thu