Qjet rebuilders?

GT6Steve

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Anyone have any current recommendations for Qjet overhauls? The search produces a lot of old references but a lot of them are gone now....:chinese:
 
I bought a large paperback, Rochester Carburetors by Doug Roe and Bill Fisher off ebay. Published in 1973. Lots of pictures. Probably not much new after that.
 
Anyone have any current recommendations for Qjet overhauls? The search produces a lot of old references but a lot of them are gone now....:chinese:

E-mail Lars Grimsrud, XXXXXXXX

No offence Jeff, but please, don't let someone's email address visible on public forums, unless you really hate the guy.
Best way to get him registered on some more spammer's database, and it's the kind of mailing list you just can't leave.
Everytime that make facepalm the nerd in me. Someday I'll propose a sticky on how to retain self's and other's privacy online.
 
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Anyone have any current recommendations for Qjet overhauls? The search produces a lot of old references but a lot of them are gone now....:chinese:

E-mail Lars Grimsrud, XXXXXXXX

No offence Jeff, but please, don't let someone's email address visible on public forums, unless you really hate the guy.
Best way to get him registered on some more spammer's database, and it's the kind of mailing list you just can't leave.
Everytime that make facepalm the nerd in me. Someday I'll propose a sticky on how to retain self's and other's privacy online.

Lars email is all over the internet...he puts it out there himself.
 
If you want to take a stab at it yourself, I can loan you the Rochester book. Has all the important stuff on the E4M carbs. Hell, I'll even throw in my old carb (worked when I took it off) if you want. I'm not planning on going back to a computer carb.
 
Lars email is all over the internet...he puts it out there himself.[/QUOTE]

Denis, I wouldn't do it if I did not have permission. J
 
Anyone have any current recommendations for Qjet overhauls? The search produces a lot of old references but a lot of them are gone now....:chinese:

I did my own E Carb, as Lars does not. I have the tool to set that solenoid, as does sixfooter.
You need the tool, patience, and a carefull exam of the air horn. Warpage of the air horns are their death.
 
Steve, I guess the important question is, are you rebuilding the factory E4M? Really, there's no reason to. Even here in Clark Co. the smog check for early cars doesn't even include removing the air cleaner. The "technician" will have absolutely no way of knowing if it's hooked up or not, or even if it's a Q-jet vs Edelbrock vs Holley vs TBI. For cars as old as ours, the standards are so sloppy that a well running non-computerized car that doesn't burn oil will pass easily.
Then again, you can always register as a Classic car/Classic Rod/Antique and as long as you stay under 5000 miles/year, smog is a moot point.
 
One good reason on a stocker. Look at my dyno sheet A/F mixture at the bottom. Try doing that with a regular carb.

35029839a1ca5a.jpg
 
I do intend to rebuild the stock carb to stock specs. I really have no reason not to. I can tune webers sidedrafts and all of the Brit carbs but have no clue on tuning a downdraft. Thusly I feel better with it near to stock.:crutches:
 
Thusly I feel better with it near to stock.:crutches:

Good call. The Doug Roe book has you drilling passages, bending linkages, drilling out the plugs ( the picts in the book looks to me like he's making a real mess ) etc etc as it is geared to all out performance. I wouldn't bother buying any of those books and just find every Lars paper and Lars thread i could get my hands on. There is a real good thread right now on CF where he's helping a guy from Sweden. I got something out of it, realizing my low speed air bleed restrictors are missing.

A lot of rebuilders are listening to those books and put extra time and effort into fucking your carb up, plugging passages removing or blocking air bleeds thinking they're going to make it a "performance" carb.

For the cost of a dyno tuning session you could buy a widband sytem and do a better job as you have all the time in the world to get it perfect.
 
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I have the Quadrajet book but haven't looked at it in several years.
{Rochester Carburetor Manual, Haynes # 10230.} Is that the right one?

Oddly, everything made perfect sense to me as I read it, presumably because it's closer to the foreign stuff I'm used to with jets and metering rods.
Nonetheless, I managed to miss some important detail during the rebuild as it never ran right. I bolted on an Ebay computer carb and it ran better.

Now I'm going to send that original carb to Ole's as the throttle shafts seem tighter than the one that's on it now.



While tossing around in the wee hours think period last night I realized I may not be dead yet. I still have to present it for a SMOG check and it has passed before. If I pretty up some hoses and get the air cleaner CD offered I may just pass and it becomes a rolling restoration, a preferable condition:wink:
 
Just ordered the Doug Roe book as I realized the one I have is not the one. I'll be cautious of redrilling and such modifications. Thanx
 
Just ordered the Doug Roe book as I realized the one I have is not the one. I'll be cautious of redrilling and such modifications. Thanx

I used the Doug Roe book and it helped alot. Lots of pictures. I did not drill out any passages or anything wild. I did bend some of the choke linkage, and it works better. Just back to factory spec's.
Also, the book gives you alot of general info, so if there is a problem or you need to adjust something, you'll know how it is suposed to work.
 
I used Cliff's book, and it was easy to follow, great information and pics. On top of that, I was able to call Cliff and talk to him many times for suggestions and recommendations. It might be worth picking that book up too if you don't already have it...
 

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