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34 ADM Webber conversion

gday all,

ive heard from a few people and numerous posts on the site that putting a webber 34 adm carbie on my 202 blue (currently with Varajet 2 carbie) would be a good move. i was just wondering what sort of benefits there are from the conversion? i dont know much about carbies so any help is appreciated. Also what sort of price am i looking at and what sort of stuff needs to be bought, manifold etc?

Thanks
Tim_202

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There are probably more than a few posts on this but the benefits of the Weber conversion are undeniable.
More power on tap when needed, better economy when extra power not needed. Better cold start, better hot start, better idle. If there is a down side to a Weber conversion on a Blue/Black 202 I have not found it yet. The post below is my last conversion to a VK with Black motor. Very good!

http://oldholden.com...

You will need a 34ADM Weber and air filter of an XE or XF Falcon. Either off a 3.3 or 4.1 Falcon will be fine as they are jetted the same. The XE Webers have a little less connections for emission controls but either is suitable.
Rebuild the carby properly with a full kit including the small diaphrams, a good clean and blow out with a compressor.
Get a Redline adaptor. Someone will have an adaptor number for you.
You will need 3 thick base gaskets to space the carby up high enough to clear the accel pump linkage.
Your accel cable will be ok, but you'll have to play with the bracket a little.
Good luck
Cheers
LMH

Sure, Power gives you top speed
But TORQUE is how you get there!

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Ecotec V6 Conversion Suspended. Keeping it original!
See My Shed: http://gallery.oldho...

I'm doing the same right now. I picked up 34ADM off XE and redline manifold. If you live on North side of Brisbane I noticed the Ford Wrecker at Clontarf has the same manifold for $55 and you can get weber and air cleaner from them for $88 then you'll need adapter plate to go from holley 2 barrel bolt pattern $30 form autobarn (that's what redline manifold has) to weber 2 barrel pattern or Holley to blank and drill and tap your own threads for manifold studs (you'll need 2 1/4" studs). You will also need to make a new bracket or modify the existing one for your accelerator cable.

If you look around further you should be able to get a weber cheaper but make sure the idle solenoid is ok and the choke butterfly moves freely. Then put kit through it. The one I got was actually in real good condition so at this point haven't bothered with kit and aside form this will run on LPG, so it is really only acting as throttle body.

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I've just finished the conversion and am happy with it compared to the varacrap, there are some definate benefits (definatly better idle, cold start is a breeze and warmup is a whole non event. More power is on tap IN THE END) But personally I have had a small negative with mine.

When it's cold and u open the secondary there IS a hesitation (BAD when it's cold) once warm, the hesitation becomes more of a flat spot and only if you smash the throttle from cruise (not noticable read: non existant when pulling away from the lights)

I had mine dyno tuned to help diagnose this and they ended up jetting mine with a 137primary and the original 210 secondary. Economy was is a BIG improvement over the varajet. 6.5-7km's per litre versus the varajet 4-4.5km's and thats still with the 3.55 rear end!

I DO think the timing has an impact on this flat spot with a weber/202 conversion.
When I first fitted it, the flat spot wasn't so bad, but the car was pinging at high rpm even though it was running a bit rich, so backed off the timing, but the balancer had slipped so the tuner backed it off way too far and it became undrivable. Fixed the balancer and readjust timing, it now has a good balance but the flat spot is still there under hard acceleration (again not off idle, just when moving)
Just found my advance spring is broken and I'm not gonna blame the carby any more until this is sorted out! But long post aside, I think the timing IS important on this combination, the varajet never seemed to care if the timing was a bit amis.

All aside I am happy with the conversion, definatly an improvement and except maybe the accelerator linkage, not that hard really

Hope that helps you decide!

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The vacuum to the power valve & accelerator pump boost diaphragms is supplied through this tube. The vacuum port continues down through to the base of the carb between the primary and secondary bores. The tube also acts as a location dowel. It is long enough to pass through the thick gasket and into the base. Now what can happen is that if you don't line up the dowel perfectly to the base and you attempt to tighten the base screws then the tube can be pushed further into its bore in the body of the carb. The end result is a blocked vacuum passage. This will result in a rich cruise mixer and a hesitation when the second barrel opens suddenly. To check that the passage is unobstructed, place you mouth on the tube and suck or attach a tight hose and suck on it. It should feel easy to suck through. If not then this is what needs to be done

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I have a 34ADM Webber fitted to a 202 in a HQ sedan. What I want to know is where do I buy a kit to adapt the throttle cable from the old linkage assembly to the new carby?

Regards
Ian

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hey guys, i have put a weber 34 adm on a 186 and installed in my hq holde (186 in a hq? i know, its a long story) anyway i have put the blue 202 electronic ignition on the car also and am soon to put xu1 headers on, fiddled around a bit with it tonight patching up the [Naughty Pottyword] i missed/didnt bother with when i put it in, played with the ignition timing a bit and ran it about 10-12 degrees, starting to get closer with the timing and seems to have sorted out its low down power/torque issue, the only thing i am trying to figure out is an accelerator bracket, anyone with some advice on something maybe from a different model or one from a specific company would be any help, the thin alloy bracket with tiewire to re-inforce just isnt cutting it, but overall review of the conversion, absolutely amazing, ive done the great ocean road with it whilst it had a [Naughty Pottyword] clapped out dizzy cap and still got 450km to a tank! and thats in a wagon with a mattress and eskys etc in the back! cheer dudes

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Where would I get a cable linkage to suit my EH Holden (34adm Weber)Can I pull one out of another Holden (Commodore ?)that'll fit ? Cheers, Norm.

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If the carby is off an XE/ XF Ford try the cable (and pedal) from one of those. Pedal bolts to the firewall with 2 bolts. An EA - ED one will probably do also.

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