VK Carby diagrams??

[zaczac]

Hi,
newish to site and just picked up an old VK with a 202 black carby engine.

Old owner has tinkered around and there are a few hoses etc off the inlet manifold but it runs well once warm. (are the vacum lines important to cold starts?)

The carby is a pain as it runs rough when started and then better (with higher idle revs) when warm.

The choke seems to make no diff as it is converted to manual and no help open/closed. So my questions are;

is there a cold idle screw? seperate to main idle screw?
has anyone got a diagram of the varajet carby? and all attachements, and ideas on tuning or should I get it replaced with a holley or something?

thanks
jas

[vk.jonno]

love the body on that thing

[zaczac]

thanks,
it got the 134? kit I was told.
Looks like a brock car, but only a 6.
Interior is OK too but after a heap of little trim parts in blue if anyone got any in Brissie?
need blue frotn and rear seats, blue carpet, blue window handle, rear roof lights, fuse box (engine) etc

but otherwise she is a good runner and a looker with only minimal surface rust to sort out.

[VK SL 3800]

Ill start by saying that the standard varejet carb is a pretty hard carbie to tune, there is no seperate cold idle bypass screw. you should check operation of the choke to make sure it is actually working and pulling the little idle bump screw lever up to raise cold idle speed like the standard one does. also to make sure the solenoid and all that kind of crap is connected and is getting power when the ignition is switched on.
With your vacuum lines check VKBerlina's site as it has a lot of handy info ( helped me when i took my carb off cause i couldnt remember where a few lines ran too).
If its running fine when its hot there shouldn't be too much wrong with it but you might be better off getting a webber carb from a dreaded falcon.
Also being a 6 carb VK, if its standard you've got EST which is Electonically contolled timing, (electronic spark timing), and your gonna have fun with that i can assure you

VK Berlina Project

[vkberlina]

gove the carbie a rebuild and connect the hoses per the diagrams on my site.

cheers
Scott

[zaczac]

cool, thanks for that,
half of the ones in diagram are missing or broken in my car, so will replace them all and see how they go.


thanks

[zaczac]

gove the carbie a rebuild and connect the hoses per the diagrams on my site.

cheers
Scott

thanks,
I think the carby has bits missing somewhere as previous owners have hooked up some sort of manual choke system that does not work.

I have looked at diagrams and my auto/carby 202 black is missing some items in the diagrams. (see pic) seems to be missing; exhaust heat valve actuator and air pump divertor valve.

would any of these missing explain the rough idel at start up?

once the car is running for a few minutes it runs sweet, but starts like crap!

j

[vkberlina]

Ok the air pump system is only there to pass emissions regs basically holden couldnt get the 202 past emissions so they dilutted the exhaust gasses to make it pass.

The EGR system should be connected as it will help combustion to a certain degree.

What dizzy is in the car??

I would rebuild the carbie and connect up the vac lines per the digrams on my site without the exhaust gass ones, install an electronic dizzy have the vac source for the dizzy switch via a vac source that activates once the car is warmed up.

cheers
Scott

cheers
Scott

[codfishface]

Looks like you have extractors fitted which means the inlet manifold won't be getting heated by the exhaust gasses as per the original design. It will always run like a biatch till it warms up....like mine and many others.

Not to say that the carb couldn't do with an overhaul. I'm running a reco'd Varajet with all vac plumbing under control and mine starts and idles fine, but hates anything over 1/4 throttle till at operating temp.

In your pic, just above the blue cable tie on the top rad hose, there is what looks like a hole in the head. Is that a grub screw? I hope so, as that was where one of the air pump lines used to attach.

Can you take some more pics with the air cleaner off?

Cheers.

[zaczac]

Ok the air pump system is only there to pass emissions regs basically holden couldnt get the 202 past emissions so they dilutted the exhaust gasses to make it pass.

The EGR system should be connected as it will help combustion to a certain degree.

What dizzy is in the car??

I would rebuild the carbie and connect up the vac lines per the digrams on my site without the exhaust gass ones, install an electronic dizzy have the vac source for the dizzy switch via a vac source that activates once the car is warmed up.

cheers
Scott

cheers
Scott

done the vacumm lines as you suggest.
here is a pic of dizzy.
I just hooked up the vacumm line as it was not connected. It is now connected to vacumm off tree on manifold.
thanks for help by the way

jas

[zaczac]

yep the 'holes' have a broken bolt in one and a hex head screw cap in other.

here are pics of the carby (hacked carby! LOL)

note there is one electrical cable not attached at all in one pic.

by the way thanks for all the help on this site, much better than some sites full of twits!

jas

[zaczac]

by the way I have run out of room to post pics, how do I get more or delet old pics?

j

[codfishface]

The wire that isn't attached used to heat the choke coil to open the choke butterfly once the car warmed up. Make sure it can't earth out ever cause it will blow your ignition fuse and cause all sorts of grief.

Your dizzy is a HEI unit, so that will mean the factory EST module no longer controls the spark timing. That is a bonus. Can I suggest you borrow/buy a VK manual and spend a day or 2 reading up on all the vacc/emissions/choke mechanisms associated with the Varajet as it looks like you have some work ahead.

[zaczac]

The wire that isn't attached used to heat the choke coil to open the choke butterfly once the car warmed up. Make sure it can't earth out ever cause it will blow your ignition fuse and cause all sorts of grief.

Your dizzy is a HEI unit, so that will mean the factory EST module no longer controls the spark timing. That is a bonus. Can I suggest you borrow/buy a VK manual and spend a day or 2 reading up on all the vacc/emissions/choke mechanisms associated with the Varajet as it looks like you have some work ahead.

yeah will do, just trying to find a good cheap one instead of $42- at shops,

j

[codfishface]

There a usually a couple on eBay.

This one ends in 2 days.

[zaczac]

cool thanks, I did a search the other day and only found mostly buy it nows for triple that price!

[VK SL 3800]

With your Dizzy vacuum, i have been told it will work better if you connect into the Egr System, in one of your photos you see a red hose coming off the carbie, this then runs threw a TVS,(Thermal vacuum switch) to the EGR valve.

Also an extremely common problem with VK carb 6's that is almost always overlooked is a clogged EGR valve, testing is simple, fixing can be difficult. Symptom is mainly pinging.
To Test start your engine and allow to become warm but not so hot as you cannot touch, then on the carbie side of the engine out the side of the manifold youll see a round thing with a bolt head on it, to test pull the rubber diaphragm under neath upwards with your fingers, your engine should start idling like a dog and missing and shaking, the worse it runs the better as it shows your valve is free and exhaust runs into the intake freely, if nothing or very little happens you know its clogged, with a standard carb it can be a problem as it is very difficult to adjust mixture and has been setup to run with this exhaust gas in the system.

With your choke, go to the wreckers and buy a carbie or just the choke setup if theyll allow you and chuck it on. probably the easiest fix if you want to keep you varejet

[zaczac]

I got the manual now just waiting for it to arrive.

now a few more q's.

what are the best options with carby's? I see webers, holleys etc, but I can get a rebuilt varajet for $170- delivered or I can get a recond holley 320 or 350 with adapter for around $350-
so what are a few opinions on these carbs and how well they go/adapt etc, fuel economy?
running?

thanks
jas

[vkberlina]

Ditch the lot and go EFI
I ran a weber for a while was a varajet on the same car I honestly couldnt see much difference in performance and economy the weber may have been slightly smoother under accelleration

I would fix the varajet if it was my car or convert it to EFI

cheers
Scott

[zaczac]

well I got hold of a fully reconditioned varajet and it looks so much better than mine (mine had a lot missing).

ripped off old carb, put new one on and attached all the wires/hoses etc that had been all over place and started her up,

and bingo smooth idle from cold start!!!


yay

thanks to everyone for help,

will try and do some pics later.

jas

[project commy]

I got the manual now just waiting for it to arrive.

now a few more q's.

what are the best options with carby's? I see webers, holleys etc, but I can get a rebuilt varajet for $170- delivered or I can get a recond holley 320 or 350 with adapter for around $350-
so what are a few opinions on these carbs and how well they go/adapt etc, fuel economy?
running?

thanks
jas

my opinion the varajets are a pain in the but i used to have no end of troubles with them. if you can afford it change to a holley, but if you want better fuel economy go for a webber. not to mention with varajets there is about 10 diifferent models for all of the different configurations of engines that holden released and people have trouble with one they change it for a second hand item wich may well be the wrong sort for that engine.

[L67 Calais]

I got the manual now just waiting for it to arrive.

now a few more q's.

what are the best options with carby's? I see webers, holleys etc, but I can get a rebuilt varajet for $170- delivered or I can get a recond holley 320 or 350 with adapter for around $350-
so what are a few opinions on these carbs and how well they go/adapt etc, fuel economy?
running?

thanks
jas

Bit of a revival but i gotta ask, Whereabouts can you get a recon Varajet delivered for 170??? Thats cheap as! I want one.

[zaczac]

via ebay at a shop on Burleigh. But cant recal name.

I got one but was crap and would not work no matter how I tuned it, so went HOLLEY 320 off ebay and recond it, and runs great...until I sold it....LOL

[ari666]

avoid sues carbys like the plague. bits just fall off them. my quaddy was just an absolute piece of junk.