New jets on 32/36 weber = hesitation?

[JadeEstevez]

Alrighty...

My engine is an 18RC with Extractors and 32/36 weber, No air pump or emissions stuff any more. Has only done 8000km since the rebuild. Hasn't been bored or stroked. Everything was new except for the weber. Used to run okay, had trouble starting, blew some black smoke if I floored it, also ran on when shutting off. I finally bought a weber rebuild kit and some new main jets and air correctors.

The engine also had good ignition timing before deciding to rebuild the carby. I finished rebuilding it today, after a bit of tuning I got the car running. It started up with no problems and shut off without running on, But... When you floor it, and only when completely floored, it hesitates before it gets going. The engine itself feels no different power wise, which was surprising because there should be a noticeable difference >___>

Anyways, jet sizes.

Old--
Primary: 127
Secondary: 132

New--
Primary: 140
Secondary: 150


Now I sourced the information off of Toymods to get the right sizes, I'm starting to think that it was incorrect or I'm not tuning the carby correctly.

(Before the weber rebuild)

Also, there is this auxiliary diaphragm thing on the side of the weber, it has a mechanical one on the left but the one on the right is vacuum operated... I originally had it hooked up to a vacuum that was always active:



I thought that was what made it run rich, So I had a T-piece between the dizzy advance and had it only active when the dizzy was advanced, Like this:



I need to know if this is correct, because I have it hooked up like that again.

Basically my questions are, are my jest sizes okay and are the vacuum lines good? If so then how do I go about fine tuning this beasty? =P

Thanks everyone.

[JadeEstevez]

It's my daily, I need this fixed ASAP =/ Any help would be really appreciated.

[ctrain]

If it hesitates when you floor it (kinda trys to stall) it means you either need an accelerator pump or it needs to be fixed (or properly tuned) mine does the same thing when its cold, but when its hot it doesnt hesitate, also that connection on the rocker cover (just above the air filter) that should have a pipe connected to the brake booster (mine does on my 2t) it runs shit if its not connected. your jets are fine and they should work well with the 18rc, the only vacuum lines i have on my 32/36 is from the vacuum advance on the distributor.

[JadeEstevez]

Yeah these were old photos I used just to show what I did with the vacuum lines =P I do have everything else hooked up correctly, including the brake booster hehe.

Wouldn't the accelerator pump have caused issues with my other jets though, the old jets never had the tiny hesitation when flooring it but they had a heap of other problems that these new ones fixed.?

Is there different sized accelerator pumps? If so what would you recommend?

[ctrain]

nah the jets shouldnt affect it, did you install them yourself? they could be clogged or the needle may be getting stuck, best of to take it to a carby specialist and get them to tune it, im getting the same problems, i bought a 32/36 it ran fine, sometimes pre ignites (running whilst key is off) i dont blow any black smoke, mine is running rich aswell because the carby was tuned to suit a 2T 1.8ltr and mine a 1.6ltr. Im taking mine to a specialist this week so hopefully it sorts out the issues i have. i dont think mine even has an accelerator pump so I dont know anything about them.

also what made you change the jets in the first place?

[JadeEstevez]

I got sick of the car blowing black smoke and sooty black stuff all over my sisters car (She parks hers behind mine) and the car running on after shutting it off. After I rebuilt the thing with new diaphragms, power valve, etc etc, and new jets, it Doesn't run on and it doesn't blow black smoke but there isn't any noticeable difference in power, and theres a (less then a second) hesitation from Idle to flooring it. Doesn't hesitate while easing on the throttle, but going low speed or from idle it will hesitate.

[ToyTA22]

From your last post sounds like your accelerator pump and/ or powervalve isn't working.
Also a note I made in a another thread involving Webers. When fitting idle jets donot push jet right into holder, just leave out about 1mm before installing. Otherwise don't seat properly in main body of carby and quite often will seem to rich.
When does it blow black smoke? i.e what stage of throttle use.
Carb looks like late model Ford cortina 2 litre or Mk2 Escort 2 litre. Find float settings for those model cars, carbs are usually made with a particular float level range.

[JadeEstevez]

Well I know a little bit about carbies, enough to pull it apart and put back together fine, but I have no Idea what the float does exactly. Can someone teach me? =D

Also, today I'm sussing out if the accelerator pump is the right one.

[ToyTA22]

Basiclly the float controls fuel level in relation to the jets by opening and closing the needle valve as required to keep correct level. If flot level hence fuel level is too high engine will act rich, and again in reverse, if too low will act same as to lean.
changing fuel level will effect over al rev range though.
On formula ford cars there engines are so accurately setup even 0.5mm change in fuel level can effect there performance, these cars use similar carburettor as you have with no modifications allowed except jetting.

[JadeEstevez]

How do you adjust the float accurately?

[allencr]

Float level specs? IDK.


http://www.piercemanifolds.com/category_s/317.htm

Hold the carb top vertically with the float lever just resting against the needle, not depressing its spring, With Gasket, measuring from the float's seam to the gasket.
Forget any BS stuff made for measuring it & don't worry about .5mm.
[url]http://www.biekerengineering.com/products.htm

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http://www.piercemanifolds.com/category_s/317.htm

[JadeEstevez]

Thanks mate, I will geto nto this asap ;P See if it helps

[JadeEstevez]

Alright, Had another go at it today and managed to get an awesome combo, Definitely tell the difference =P

Mains--
Primary: 150
Secondary: 140

Air correctors--
Primary: 165
Secondary: 145

Has some wicked power now, Didn't think my little 18R could do that O___o haha

[ctrain]

how much of an increase has the new jets made? is it really that noticable?
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[JadeEstevez]

Well Every other combo didn't give me this much power... Believe it or not, It is really noticeable!