Carbie suggestions

[gotrice]

Ah-Hem! Two words people - Flat Slide!!!!!

[Oneofthegreats]

What S.U.'s ?

Do you mean Mikuni's & Keihin carb's etc.

Why not run a two barrel Holley.

Any carb that's tuned properly can make the same power as fuel injection, sometimes with more torque too. Also can be just as fuel efficient.

[aprr32]

Carbs

No carb could ever compete with todays after market computers.The power and economy I get with my 20vt,not to mention the driveability, is decades ahead of any Fred Flinstone fuel metering device that relies on suction to get the mixture close. In saying that, nothing beats the sound of twin or triple sidedraughts on full song.

[Golf Loon]

In saying that, nothing beats the sound of twin or triple sidedraughts on full song.

Except maybe a blow off valve

[gotrice]

decades ahead of any Fred Flinstone fuel metering device that relies on suction to get the mixture close.

Pete, Great call! I would save said something like that but not nearly so well.

(flat slide!!!!)

[gldgti]

its very true.... but who can be bothered? not me, hehe.

nah respect to you guys who have the patience to deal with things that have mixture. myself, i prefer the simplicity of the equation air + diesel = bang in all combinations....

then all i need to do is build my little diesel strong enough to take 30psi, and it'll outpull nearly everything.

(audi's winning diesel LeMans car this year.... mwahahahahaha)

[blackgti1.8]

Interesting debate. Despite the fact that I'm running K-Jet these days, most of my Golf experience is with carbs - everything from single throat Solex, DGAV, single sidedraft Dellorto to twin sidedraft Webbers.
Ok, lets see - Solex to DGAV - no brainer Engine now breathes... better with a decent cam of course (when second throath cuts in).
Problem with single sidedraft is the depth of the manaifold + carb - twin carb manifold is quite a bit shorter.
Twin '40s are great for road use, and semi-serious competition. Good choice for a warm 1600. IMHO, you only need '45s for serious track use (with a hot engine). Of course, I'm not about the admit to why I've got some '48s tucked away in the garage!

Sorry Golf Loon, twin sidedrafts with a meaty cam beats a blow-off valve hands down I reckon for aural effect Enough to to send shivers down your spine. Funny that they sound quite different on a Golf than other engines though...

My advice - try a DGAV first, and then (later) go to twin sidedrafts.

[Bluerex]

The Latest...

OK, after a flurry of e-bay activity I ended up with all the bits (or so I thought) I needed for the upgrade.
I decided (after some CVWC advice) to open up the top of the manifold to increase the mouth area and make a better match with the spacer. Unbolted the existing carb and manifold and bolted the new manifold on. Re-did the necessary plumbing mounted the new Weber (next time I will fit the carbie first!!) and was ready to test.

After a few minutes of cranking, there was enough petrol flowing over the top of the Weber to make me worried about the entire thing going up in flames. So….. pull the cover off the 32/36 (the choke connection makes this an interesting experience) and discover that one of the floats is no longer soldered to the other, and the flooding makes me suspicious of the condition of the gaskets. Soldering is the easy part, finding a Weber gasket kit on a Sunday arvo would be more of a challenge. AutoPro at Belconnnen found a kit at their Phillip store – so after a quick fang down south I had what I needed. Long story short, I stuck the carbie back together and re-plumbed the return line (something previous owner had deleted – this may have been a mistake) and away she went. Wahoo!!
Took her for a test drive and was a little disappointed: Once warm, idle was a struggle (better with some choke applied) and she was starving at anything above 5k revs (could this be the curse of the reinstalled return line?), also noticeable “popping” on overrun (while cool, not sure it is a good thing) both with and without vac advance line attached to the dizzy. So I figure that I need to take her to someone that can tune and maybe re-jet the carbie…….

Anything I missed??

[Golf Loon]

Is your return line too big?
A restrictor of some sort usually helps. Plastic bead in the line in a moment of need
Nice work on the Sunday arvo dash

[Golf Loon]

Sorry Golf Loon, twin sidedrafts with a meaty cam beats a blow-off valve hands down I reckon for aural effect Enough to to send shivers down your spine. Funny that they sound quite different on a Golf than other engines though...

I agree with most of what you have written, but would infinately prefer a modern injected engine with a bov than a set of beefy sidedrafts. They do sound great, but I cant afford the fuel.

[syncro]

There is a T piece or a Y piece. One of them needs a slug in the return line.

[Bluerex]

There is a T piece or a Y piece. One of them needs a slug in the return line.

<Monty Python> Does it talk? </Monty Python>

Sorry, what sort of slug?

C

[Bluerex]

Well there's your problem...

In frustration I went shopping (again) and grabbed a presure regulator. I re-sealed the return line and decided to rely on the reg instead. THEN I turned my attention to the cr@p idle issue. No amount of twiddling the adjust screw made any difference!! so... lets rip out the idle jet and have a look.
Ah, the chunk of blue junk in the end of the jet could explain much.



After some cleaning we have idle!!!
A quick test drive and the smiles were starting, man when that second throat kicks in it is like NOS (well not really but you understand).

OK last thing to address is the flat spot when planting foot hard (I mean hard) easy footage worked fine...

C

[Golf Loon]

Glad you got it sorted Charles
I always have to rebuild carbys twice too. something to do with loving it too much the first time, or residual crap in the system
Could the flatspot be solve by upping the pressure reg a bit?

[Bluerex]

Could the flatspot be solve by upping the pressure reg a bit?

It's worth a try, I changed the acc pump last night, but I will have a play after work today and report back.

C