so close.. 2.0 weber 44s drives and misses Options

[gotxqss]

So did some searching.. Did some reading.. Have had this car for awhile and finally got off the ass to start tinkerin!

Cars a 75 with a 2.0 from another car.. Could be stock could be rebuilt I have no clue.. Guessing its a stock or mildly touched motor.. I had a buddy come over and get it idling pretty good.

Set float levels
Cleaned and put back together
Set linkage that sorta stuff

Just a quik list of the main parts as there might be a section that's just flatout needs attention .

Weber 44idf
32 venturi
175 air (I think these need to be higher?)
55 idles
F11 et
140 main

So anyway hopefully 1 of those things will standout to try to get me closer..

Haven't driven the car alll that much but from what I have. It will idle and rev well, the super low speed low rpm stuff feels decent but the midrange has stumbles. At a steady cruise it will pop as well. If I get in the gas pretty hard down low(under 2500rpm) it will be pretty dead till about 4k and then pulls really well to 6k.

So of course something is off but I don't have a weber guru here in vegas that I know of that can just handle it so now im asking for help..

Maybe there are some things that im missing to get me closer..

I do have 50 idles and 135 mains laying around..

Thanks guys.. Ill keep up and get this handled!!!!!!

[r_towle]

what you are feeling is probably a very rich setup.
To start with 44mm webers are to big for a 2.0 liter.
I think the smallest stock venturi you can get is the 32mm...but you can get aircooled.net to make you smaller ones...I would

Get a much larger air correction jet. start at 200
Get smaller idles and smaller main jets.
50 idles should be ok.
mains...well as you make the main smaller, and the air correction jet bigger, you start to tune the motor and lean out the main circuit.

Two ways to KNOW you are right.
Get it on a dyno, or drive it.
You will need to learn how to read plugs properly and you can get it tuned pretty damn close.
Plug reading off the main circuit requires that you run it hard (highway) then kill it prior to the idle circuit moving any fuel...
Its like this.

Take it out on the highway...keep it in fourth gear for a few mile so you keep the rpm's above 3k.
turn key off to kill motor...yet keep the steering lock from engaging.
Best and safest way to do that is to rig a toggle switch to the power lead at the coil...just make a temp one that you can remove once you are done...loosing steering at 60mph is not cool.

So, anyways..run it hard for a few miles...3-5 miles.
kill motor
pull into rest area with motor off
NEVER IDLE
pull plugs and examine the color

After 10 or 15 times, with jet changes...you will get it.
OR
Bring it to a dyno shop and have them do it.

Rich