18 replies to this topic

[scruffy_77]

Hi,

Im thinking of either a weber or twin carb for my resto project, but different people say different things about both methods, the engine I have is just a 1 litre, so not sure which is the better method. Also I have been looking at the webers and there are different kits you can get, does anyone know what kit I would need for 1 litre MK4? The ones I have seen are:

Weber DCOE Side Draught Carburettor Kit - 40 DCOE
Weber DCOE Side Draught Carburettor Kit - 45 DCOE
Weber DCOE Carburettor Kit - 40 DCOE
Weber DCOE Carburettor Kit - 45 DCOE

Any help with this would be really helpful as I dont know a lot about the difference of the two set up's and which weber I would actually need.

Thanks
Luke

[ANON]

the only way i would consider using them is as splits
just stick a pair of bike carbs on it

[mini7boy]

Hi,

Im thinking of either a weber or twin carb for my resto project, but different people say different things about both methods, the engine I have is just a 1 litre, so not sure which is the better method. Also I have been looking at the webers and there are different kits you can get, does anyone know what kit I would need for 1 litre MK4? The ones I have seen are:

Weber DCOE Side Draught Carburettor Kit - 40 DCOE
Weber DCOE Side Draught Carburettor Kit - 45 DCOE
Weber DCOE Carburettor Kit - 40 DCOE
Weber DCOE Carburettor Kit - 45 DCOE

Any help with this would be really helpful as I dont know a lot about the difference of the two set up's and which weber I would actually need.

Thanks
Luke

No offense to you or your engine, but there's absolutely no need to run any sort of sidedraft Weber on a one liter engine on the road. Besides the obvious fitment problem due to inadequate clearance between the carb and firewall, the expense and tuning difficulties likely to be faced by a Weber novice just aren't worth the limited benefit in terms of performance. You'd have plenty of carb with a properly sized SU and with the expertise of someone like AC Dodd, you could have the carb tuned properly in the course of a phone call. No trouble at all. Dodd could also tune it on the rollers and optimise your distributor advance curve at the same time. Then you'd really have a nice running engine. The Mini 7 class of racers run a one liter engine, but only use one half of a Weber sidedraft. The disconnect one half and just tune the other half. The intake manifold only has one opening for one barrel of the carb. These racers do quite well with just one barrel and rev to 9,000 RPM. So there really is no point at all in fitting a Weber sidedraft to a roadie one liter.

[WiredbyWilson]

I think Harber07 on here has a weber on a 998, so give him a pm.

I have one on a 1275 and will be putting it on my tuned 1330 - the noise is awesome.

There will be many on here saying fuel economy is an issue and no point as an SU is more than capable. All valid points, but if you want one go for it.
I am running a DCOE 40 - but i THINK a 45 is a better option for you - but i am not 100% in that.

Also if it is a DCOE it is a side draught weber - so one and the same thing mate

[WiredbyWilson]

No offense to you or your engine, but there's absolutely no need to run any sort of sidedraft Weber on a one liter engine on the road. Besides the obvious fitment problem due to inadequate clearance between the carb and firewall, the expense and tuning difficulties likely to be faced by a Weber novice just aren't worth the limited benefit in terms of performance. You'd have plenty of carb with a properly sized SU and with the expertise of someone like AC Dodd, you could have the carb tuned properly in the course of a phone call. No trouble at all. Dodd could also tune it on the rollers and optimise your distributor advance curve at the same time. Then you'd really have a nice running engine. The Mini 7 class of racers run a one liter engine, but only use one half of a Weber sidedraft. The disconnect one half and just tune the other half. The intake manifold only has one opening for one barrel of the carb. These racers do quite well with just one barrel and rev to 9,000 RPM. So there really is no point at all in fitting a Weber sidedraft to a roadie one liter.

As said. But lets not get into the "no point" row, as it isn't answering the question

If you want one go for it, isn't that what mini ownership is about? I mean they don't NEED 13x7 wheels but some still fit them

[mini7boy]

No offense to you or your engine, but there's absolutely no need to run any sort of sidedraft Weber on a one liter engine on the road. Besides the obvious fitment problem due to inadequate clearance between the carb and firewall, the expense and tuning difficulties likely to be faced by a Weber novice just aren't worth the limited benefit in terms of performance. You'd have plenty of carb with a properly sized SU and with the expertise of someone like AC Dodd, you could have the carb tuned properly in the course of a phone call. No trouble at all. Dodd could also tune it on the rollers and optimise your distributor advance curve at the same time. Then you'd really have a nice running engine. The Mini 7 class of racers run a one liter engine, but only use one half of a Weber sidedraft. The disconnect one half and just tune the other half. The intake manifold only has one opening for one barrel of the carb. These racers do quite well with just one barrel and rev to 9,000 RPM. So there really is no point at all in fitting a Weber sidedraft to a roadie one liter.

As said. But lets not get into the "no point" row, as it isn't answering the question

If you want one go for it, isn't that what mini ownership is about? I mean they don't NEED 13x7 wheels but some still fit them

wilson, there's no row, just an opinion expressed. sometimes it isn't enough to merely answer a question. You do the person asking a question a disservice if you only answer his question. Given the great expense of a Weber, I hate to see somebody invest in one only to find out that they're not happy with it. I'm not alone in thinking that a Weber sidedraft is way too much carburetor for a road 998 that is mildly tuned. Just because some other people make poor parts buying decisions, it doesn't mean that we should limit our response to only the question asked.

This person asking the question needs to hear from people who think he would be better served with an SU than a Weber. Just because we offer an opinion, it doesn't preclude the asker from making up his own mind and buying a Weber anyway. Decision making should involve data gathering and soliciting opinions of those who might have more experience or knowledge.

[mighty mini jack]

Yup, worth pm'ing Tom (harber07)

He'll be able to help you out abit.

[WiredbyWilson]

chill mini7boy, i was merely showing that the immediate response to a weber is "don't bother".

the original post was whether a weber Vs twin carb, and i agree about the fact information should be gathered etc etc - so please don't get all pumped up over it.

me personally would go for a weber, yes they are awkward to install etc and are not the most efficient - but being different and the noise

Carry on

[mini7boy]

chill mini7boy, i was merely showing that the immediate response to a weber is "don't bother".

the original post was whether a weber Vs twin carb, and i agree about the fact information should be gathered etc etc - so please don't get all pumped up over it.

me personally would go for a weber, yes they are awkward to install etc and are not the most efficient - but being different and the noise

Carry on

I'll chill when you do. I was just trying to help out the inquirer and you got involved for no reason.

[cap'n crunch]

I think it really depend on how much power you are expecting to make and how concerned you are about economy.

Personally i think a Weber DCOE 40 may be a bit O.T.T if you are only making between 40-70bhp, but it does not mean it cannot be done, but an SU would do the same power and give you good economy as well. Though as wilson1275 said you won't get that same sort of noise from an SU

Twin HS2 are a good setup with a 998, good throttle response and low down torque and will return a good economy. Maybe a little fiddley to balance and tune but if you have them properly set up at a rolloing road then it is not an issue.

Or you could go down the same route as me and try a Weber 28/36 DCD...

[scruffy_77]

Hi Guys,

thanks for the info, I did guess there was a thin line between the twin carb and weber as people I have spoken to outside the forum have had different views between both setups.

however, the part about the noise has got me interested - i do like the sound of the weber if it has a different noise to it sounding better than the twin carb setup, and even if the performance doesnt make much difference the sound a weber makes (which i havnt heard) but take your word leans me towards a weber.

Ill PM Harbor07 and see what he says.

Thanks for your help people, appreciate it, and sorry it was a delicate question.
Just out of interest cap'n crunch, what engine do you have?

Cheers,
Luke...

[cap'n crunch]

998cc
Twin HS2 (soon to be Weber 28/36)
12G295 (cooper 998) cylinder head
Forged Rockers
Cooper Freeflow Manifold
Stainless Steel twin box RC40
Lumenition Magnetronic Ignition

[HARBER07]

PM'd (If anyone else wants the link to my 998 running a weber PM me, as it contains naughty language lol)

[Goldie1275]

Go for a dcd 28/36 weber its a down draft you don't have to cut the bulk head, it retains more mpg than the DCOEs due to the chokes coming in one at a time with one small and one large and has the same great noise and is good for 998 up to 1380 thats what my boyfriend has on his 1293 stage 4 engine. plus they look great too


cap'n crunch good on you there are far to few 28/36 weber'ed minis out there.

Edited by Goldie1275, 19 February 2009 - 09:31 PM.

[Racer_Pete]

If you want the noise choose the webber over the SU, theres no denying that a webber sounds great, But i'd personaly choose twin HS2'S on a 998 unless its an all out racer like a Mini Seven for example. whats the full spec on your engine?

I dident think twice about using a webber40/45 in my 998 build as ive heard there a right pig to setup correctly and then you need to cut the bulkhead for a decent manifold etc.. and your hardly going to gain much power apart from some top end bhp.
Pete.