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I've been alll keen to install my newly acquired weber onto my old faithful, But I had a chat to a carby mechanic today and he ahd some rather discouraging things to say about the idea. Mainly that more likely than not, off the line acceleration would probably drop, that flat spots would increase, and that on sharp corners or steep hills lag would occur. Can anybody here give me some more info on these points, which ones are valid, weither the whole thing is worth it, and any other pros and cons that should be noted?

It has been a rally mod for years and has been said to be comparable to twin hitachis


primary main jet #132
2ndry main jet #130

primary air jet #160 or #175
secondary air jet #165 or #135

primary idle jet #50 or #55
secondary idle jet #55 or #50


seeing is believing. in my experience just some times those you think should know spin SH1T. Has been heaps of weber converts in here.

I know what you mean. On my first car i took it to a mechanic, and he said it needed a new carb. I said I was considering an upgrade to a weber but he talked me out of it. Later on i upgraded anyway and the difference was amazing. I could have saved the cost of the second hand standard carb and had better performance if I had ignored him in the first place. As usual he charged me a fortune and now I do almost all of my own mechanical work. It seems every time I get someone else to do something for me I end up disappointed.

How it runs is all up to how it is set up and the above info is exactly what you need. Someone has already done the hard work for you. I will be taking note of this myself. There is a book all about Webers that I have found invaluable. Even if you don't have to rebuild or tune it yourself it will at least help you understand how it all works.

Go the Weber.

Weber -

Pro's = Significant power increase
Con's = Aprox. 17L/100km

You'd have to weigh up want you want.

My 206kw GTB does 12L/100km...

smoov wrote:Con's = Aprox. 17L/100km

Hmm. My Weber is at 10l/100km on the highway and about 12l/100km normal driving.

dont forget the sound they make, oh yer... gargul gargul...

any1 no the p.n on for the webber adaptor as ive got a webber but no adaptor yer

Right, You have convinced me. Fuel consumption, while always a factor, isn;t my major concern as it only really pops me to and from work, and maybe a few places in between. But I'm all about performance, so DAMN the Torpedoes, FULL SPEED AHEAD!! wot, wot..

IGNORE smoov, he's in a different class now he don't suffer the MY or L series.

17 litres per 100km in Sydney traffic I am sure he meant to add

17 ?? really ?? i musta missed your latest aquisition there smoov, noice

Yeah right. I'm in the heart of Sydney, but the being the smooth Bastard taht I am I knows all the ways around the traffic, sos I guess its still cool.. Either way, shes going in.

Fang wrote:Hmm. My Weber is at 10l/100km on the highway and about 12l/100km normal driving.

What gearbox ratio was this at? Mine was a 3.7, and high speed touring (100km/h) required 4 <-> 5 shifting...

17L is mixed figure of touring and sydney city driving. I must stress though, that I did used to love hearing the secondaries open up...

I also gotta dig out my jetting figures... they were rather aggressive for a 1.8L, but alas, tuned for 1.8L with utmost regard for power, and least regard for economy.... Mind you, idle was gloriously smooth for a boxer...

SMOOV, secondaries ? plural ? how many webers did you run ?

that now leads to a special post for our kiwi friends...

For those interested, the book i mentioned...
ISBN 0-89586-377-4

jono wrote:SMOOV, secondaries ? plural ? how many webers did you run ?

that now leads to a special post for our kiwi friends...

Secondary jet/jets. I don't want to be patronising here, i thought you'd know how the second butterfly opens up for performance after putting your foot down maybe halfway.

Maybe he stuck a 4 barrel weber on the lil 1.8L, that would be crazy and would also explain 17L/100Km... would sound nice tho

smoov wrote:What gearbox ratio was this at? Mine was a 3.7, and high speed touring (100km/h) required 4 <-> 5 shifting...

17L is mixed figure of touring and sydney city driving. I must stress though, that I did used to love hearing the secondaries open up...

I also gotta dig out my jetting figures... they were rather aggressive for a 1.8L, but alas, tuned for 1.8L with utmost regard for power, and least regard for economy.... Mind you, idle was gloriously smooth for a boxer...

Alex - it is a 3.7 - and I too know ur pain about the 4 <->5 shifting. My L cruises at 2300rpm @ 100kph in 5th. Opening the secondaries wil do that - I rarely open mine up. I also ended up spending a small fortune on an old mate to tune it properly for me.

If you like to put the foot to the floor, you will experience the figures Smoov quoted.

El_Freddo wrote:Maybe he stuck a 4 barrel weber on the lil 1.8L, that would be crazy and would also explain 17L/100Km... would sound nice tho

LOL Bennie - a mate of mine had a 4 barrel Holley (660) on a 2 litre Escort. THAT drank some fuel. It did move like a cut snake at least.

Was definately a 32/36 Early Weber. It was a mint find indeed. Purchased from Andrew who used to grace these forums. No choke. Never got cold enough for it here. Nothing an idle for about 10 seconds couldn't resolve.

A mate also had a weber'd EA82 L. Similar economy figures, he drove pretty much like I did (like it wasn't his). Funny thing was, mine yielded a little more power... maybe because my motor was a little tighter... (260K vs 125K)

Smokey now owns my old L. I haven't seen it since *sniff*. On the project soob front however, I think will be an indefinite freeze...my GF and I are on the verge of purchasing a house...she's already frowning at my GTB and the spending that's happening on that atm...