Weber Carby Upgrade Instructions suit any 4 cyl carby motor.

Engine related articles specific to induction (carby, EFI etc.)
Pricey
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Post by Pricey »

I'm in WA. Would the cops really whip out the pineapple for a weber? Its just a carb ffs! :(
Twin_Weber
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Post by Twin_Weber »

Depends on the cop i would say.. my car was 2 mm too low and i got a defect.. And that was cause i had a broken exhaust rubber
Pricey
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Post by Pricey »

2mm! What a joke. Suspension sag would probably account for 2mm. Your copper sounds like a bit of a pole smoker.
MGOTD
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Re: Weber Carby Upgrade Instructions suit any 4 cyl carby mo

Post by MGOTD »

With the carby off I took off the inlet manifold, and got a hacksaw blade and cut the center out of the manifold then with some steel grinders i set to work porting the carby inlet to suit the weber. This is how it finished up looking
Image
Image
just wondering what cutting the middle bit out does??? does it increase performance???

cheers
gemhead
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Re: Weber Carby Upgrade Instructions suit any 4 cyl carby mo

Post by gemhead »

MGOTD wrote:
With the carby off I took off the inlet manifold, and got a hacksaw blade and cut the center out of the manifold then with some steel grinders i set to work porting the carby inlet to suit the weber. This is how it finished up looking
Image
Image
just wondering what cutting the middle bit out does??? does it increase performance???

cheers
jsut means no restrictions
Image
Beano
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Post by Beano »

if you don't remove the divider, the air coming through the carby will hit it which causes turbulence, which reduces the amount of airflow, which reduces horse power.

see:

www_giant_net_au/users/wight/Manifold_htm

replace the underscores with "." as I can't post URLs !!
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Rodeobob
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Post by Rodeobob »

Piazza for sale, black, manual, in fair condition with heaps of parts $3500 (parts not for sale seperately)
DO NOT PRIVATE MESSAGE ME FOR ASSISTANCE, IM AN ASSHOLE YOU WILL GET AN EAR BASHING, ASK IN THE GENERAL FORUM.
IZU069

Post by IZU069 »

PEDANT: I agree with the mod as shown at the above www.giant.net.au/users/wight/Manifold.htm
The standard manifold causes a restriction to the flow etc.
But to clarify, sufficient turbulence is required for good burn and power. Some cars with smooth straight ports with short distances to the carby need to introduce restrictions to create more turbulence for sufficient air/fuel mixing - mainly a low speeds.
Longer manifolds or non-smooth-bore short manifolds don't have this problem.

BUT this is NOTan issue with this set up!
As I said - PEDANTic. It's just that I knew a dude with this problem and he spent a fortune before listening to the advice he was given. Stupid BMW driver - the only good advice is expensive advice from the "experts"! Tee-Hee!
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kizza
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Post by kizza »

here is a list of the jetting i have used on my current 32/36 weber.
the engine is a 1.6 litre bored 20thou, standard internals as far as i know.
extractors, inlet manifold ported out to gasket size.
primary idle jet 50
secondry idle jet 50
primary main jet 140
secondry main jet 132
primary air jet 190
secondry air jet 180

im not saying that its the right jetting but its definately driveable.

for anyone that wants to setup there weber heres a good starting point
Image
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