I have read that the electronic Quadrajets are difficult carburetors, but I don't know why. The electronically controlled metering system seems like a good idea to me, although I assume the carb and computer are a very expensive combination. DSKRALL

 

I think that the carb is no harder to work on than a standard rochester. For it's time it was actually a nice system. I get almost 20mpg on the highway, about 13 in the city. The problem with it is if you want to modify the engine I have found now way to customise your computer yourself. I checked into it before and Jet will do a custom chip, but it is about $300 each time you make a big change. Also if you live in an area where they require a visual emission inspection then your only upgrade option for the carb is to go with a newer engine because the carb part of the emission system. I found a performance computer that was made by Papile performance systems in the early 80's. This computer allowed you to tweak the advance and mixture, but I bought it off of ebay and it works, but it is running on the defaults and no longer allows for adjustments. I don't know if the company is still in business or not, I was unable to find them on the net. :cheers:

 

The E4ME is not that difficult at all. It's all a matter of getting to know how to work on it. Once properly set up it works fabulous, providing for a very accurate mixture and real good driveability. And, depending on what everybody means by not being able to run this carb on a modified motor, it all depends on how far we are talking about being modified. My motor is essentially stock, with the exception of my cam and exhaust, and after I got my carb retuned to run on this setup it works quite well. If you run a large cam that leaves you with very little vacuum you will end up with problems, but they are the same problems you have with any carb.....the engine isn't making enough vacuum to suck the fuel into the cylinders so it loads up on idle then when you step on it the fuel is sucked into the engine flooding it out for a short time. (I used to have a cam like this with this same carb so I know all about it) :) But for a car that is a daily driver, or even a driver with a little extra :cool: it works well. If you ever end up needing a new computer the cost is a little, but they aren't all that bad anymore either. And the parts for these carbs are available and reasonably priced as well. I have spent a lot of time learning and teaching myself about these carbs and am now to the point that I am more comfortable with them than any other carb I have ever worked on. I give them two thumbs up. :thumbs: :thumbs:

-Justin

 

I actually logged on tonight to ask for advice about learning the e4me carb. Even the help I have received here, there are parts I don't know, etc.
I am going to get books and study this thing. Can you recommend books? Thanks

 

Stevo,
Doug Roe does a good book on Q-jets that's got a section on the E4ME. It makes you scratch your head for a while, but as soon as you pull the carb apart it all starts making sense :)
I like the E4ME. As long as you pick a cam that gives good vacuum, & set the carb up correctly, you'll get good response & really good fuel economy. The only problems I've had with mine turned out to be down to Bubba :mad
:cheers:

 

Yes, Doug Roe's book is a great one to have, there is also some bits of information in Haynes, Computer Codes and Electronic Engine Management book.

 

The replies are great. Thanks to everyone, especially Justin. I had a feeling that the E4ME would have its proponents and its advantages. DSKRALL

 

DS, All of the other replys are right on. If you are used to working on non-electronic Qjets, initially the adjustments on the primary side are different and maybe a little intimidating. But with the carb disassembled and rereading Doug Roe's instructions several times you will see that it's not very hard to set right. Also the electronics have nothing to do with the secondarys, so you adjust them just like on any other Qjet. Once all is set , you can cruise economically and still get that great Qjet kick when you floor it. Hershey :chevy

 

If these things are so easy to work on, how come I can't find a single person to rebuild mine!! :mad

Actually, a very nice forum member offered to rebuild mine... so I sent him 3 of them (in order to get atleast enough parts for one carb). I haven't heard from him in almost 6 months. I'm getting a little concerned, actually. Not like him not to return emails.

Anyway, if anyone knows of a reputable place that will do a full tear-down and rebuild of these carbs, PLEASE let me know! I am in the Dallas/Forth TX area; but, wouldn't mind shipping the carb if need be.

Thanks!!

 

Two websites to look at.

Nationalcarburetor.com
Recarbco.com

 

k_belknap,
Don't worry, he's not forgotten your carbs. They're currently on his bench waiting for him to get some spare time to do them, but his life/work has got manically busy at the moment & spare time is at a premium (know the feeling!).
:cheers: