New Carby vs old carby

[zaczac]

Hey,
ran out of pics in old thread so here is a new one to show the pics of my new vs old carby,
Got a fully recon one for only $150- as mine was missing parts anyway.
fitted it in no time and now runs with smooth idle from start instead of stalling etc

thanks for the guys who helped on other thread too,

now to get the fuse box fixed (partially melted) and get AC going!

jas

[ari666]

nice! what a retarded looking carby though! you get it from sues carbys? if so get ready to tighten up all the screws and pull all the vac port connections out and araldyte them back in.

for some reason my reco'd quaddy fell to bits.

but yeah, realy carbys look like this:

[codfishface]

Lookin' good Jas.

I installed my reco from Sue's about 7 months ago. Makes a mighty big difference.
Have fun trying to keep the sucker looking clean!

[zaczac]

yep,
I guess we will have to see how it goes?
looks good so far, but will keep eye on it?
everything seems tight, maybe they sorted things since yours?
will wait and see.

j

[neet_wagon]

How much did a reco'd carby set you back? Probably coulda got a 350 for that (holley not chev lol)


****I bought a brand-new quaddy about 6years ago for my WB i was doing up, I will have to find it. s'pose it'd be worth something these days

[ari666]

Have fun trying to keep the sucker looking clean!

bah! dirty carbys look better than clean ones

[zaczac]

How much did a reco'd carby set you back? Probably coulda got a 350 for that (holley not chev lol)


****I bought a brand-new quaddy about 6years ago for my WB i was doing up, I will have to find it. s'pose it'd be worth something these days

only $150 and bolts on.

A Holley in same cond is about $300 plus kit to fit ($50-ish) and mucking about fitting etc,

so just went the original for now.

jas

[VK SL 3800]

nice! what a retarded looking carby though! you get it from sues carbys?

Oh c'mon, there not that retarded!! It just looks weird cause hes taken a picture of the whole choke setup side! But your right nothing beats a nice big carbie.

[idislikeflys]

howz it all, a tad concerned about my quadrajet carby that was just rebuilt for $350 that still leaks petrol out of the top gasket, car wont idle either. the car is a vk with a 308 black motor, the leak isnt bad but im definitley no expert but i would think the gasket isnt supposed to get soaked with petrol, anyone with any ideas, because the bloke also gave me no warranty since there was water in the filter when i gave it to him(he told me this), if ive been scammed id chop his legs off, no worries , but since im no expert, and he was a pretty good bloke, some info from yo commodore nuts would be much aprreciated
CHUR

[ari666]

well lets not go chopping anyones legs off just yet a wet top gasket is fine. just check that all the top torx bolts are done up tight and itll be ok. they get wet because they are right next to the fuel bowl and it tends to slosh around, soaking the gasket. if you mean its flowing out of the top gasket, then that could be bad. itll prolly mean the float is set too high (good) or the body is warped (bad)

to adjust the float, suss my thread out: how to rebuild/ modify quadrajets (also vac hose diagram)

there is a bit about half way down for float level adjustment. sorry about the format but i CBF fixing it to make it more 'readable'

as far as egtting you car to idle. turn the mixture screws in all the way, then turn out 6 turns (or 3 full turns 360 degrees) thats your starting point and it should run just fine.

[zaczac]

well I am still having issues with a flat spot just at low throttle.
I had carby checked over again and all new gaskets.
Even did the manifold gasket as old bolts were loose.
But still getting a flat spot just on very light throttle and if you hold it at 1500-2000 rpm it just stalls, and spits a bit of fuel out top of carby, but at high revs OK.
The idle is great now that auto choke works and car has extractors so carby guy said it may need to be run a bit ritcher?
ideas? on what else can cause a flat spot?
car blows no smoke at all and motor feels strong.
jas

[ari666]

yeah, when i sad "just fine" i meant that it will start and idle "just fine" but not properley. you initially said it wouldnt idle. now you need to tune it.

so you time it at 8 degrees base timing with the vac advance diconnected and plugged up.
then set idle speed to 850 rpm (in D if its an auto)
then stick your vac guage on the full vac port and tune the idle screws. turn around 1/8th of a turn on the left, then turn the other one, then check your vac reading. it may take a few seconds to level out. what i do when im in a hurry is pull the throttle quickly (but remember its in gear cos' i almost ran myself over once) and wait for it to settle.

itll take a lot of patience and leaning over your hot engine to get it right. when your are turning in the right direction you will hear the revs go up ever-so-slightly and the vacuum should rise as well. what you want is to find the highest STABLE vacuum. you can get a massive vacuum, but the needle will be all erratic. also we are talking increments of 0.05rpm and 0.001 InHg so when i say "you have to be patient" you have to be patient and really pay attention.

after you have done all that crap, got it spot on and it still bogs, then it may be you secondary butterflys need tightening up. go back to my quaddy link and read up how to adjust it.

once you get your idle mixtures right the flat spot will go away

[zaczac]

also what about the fuel filter, is it always supposed to look half empty? as mine is clear and never full.
could this be part of the issue?

jas

[zaczac]

also mine is the varajet 202 not the V8

[ari666]

oh bollucks, soz i mistook you for 'idslikeflys'

no idea on varijets

[codfishface]

Does your flat spot only occur at temps below operating temp?

As I've said before, the original exhaust/inlet manifolds are bolted together, creating an inbuilt heating device for the inlet manifold. By fitting extractors, the inlet manifold takes longer to heat up and a flat spot just off idle will be present until it does. Red holden donks had water pipes in place to heat the inlet to achieve the same effect.

This is an example of the extremes of cold inlet manifolds - Carburettor Ice - Holdenpaedia

Warm the car up, then check for flat spots.

To keep ari happy, think about where the inlet mani is situated on a V8. Wedged in the valley of the heads. Warmer than a nun's tongue kiss.

[zaczac]

does it cold and hot,
and stalls when you keep at constant revs,
but if you go on-off-on-off throtlle it stays going?

[codfishface]

Hmmmmm, bugger.

All things being equal, if you take it as given that the carb is fine, I'd check vac lines, PCV valve, fuel delivery and history with previous owner.

Maybe squirt some carb cleaner down it's throat. Try some 98 octane?

I think you mentioned before that you swapped it out for the original carb....if that removes the flat spot then I'd be returning the new one while your warranty is still valid.

[ari666]

look. if its any guide: i bought a quaddy carb of sues carbys. the day i installed it a couple of the vac port connections fell out (literally fell out, i pulled a hose off and the metal connection came off with it) slowly after a few months pieces just fell off it. while i was still driving on my "falling to bits" sues carby i rebuilt my original quaddy myself, put it back on and instantly gained a tonne of power for the same economy and sorted out a massive vac issue.

personally, i would rebuild your old carb. take your time, then once its done throw your "sues carby" in your parts box.

[ari666]

To keep ari happy, think about where the inlet mani is situated on a V8. Wedged in the valley of the heads. Warmer than a nun's tongue kiss.

and dont forget the heat-riser tube which is located on the drivers side of the inlet manifold. heats up via the oil in the valley which tells the choke to switch on/off, but also keeps the carby body warm