Brake Booster and Weber DCOE 40 Clearence

[willie002]

It seems I've read somewhere there is a clearence problem when using the Weber DCOE 40's on a non-Tii application. What I read, said the horns and air cleaners hit on the brake booster and the best solution is to trade the original booster for a Tii booster because their a little different size. Can anyone shed some light on this? Is there any other stumbling blocks in this application? Any information is greatly appreciated........

[Hans]

A friend of mine uses what is politely referred to as the banana adapter, which curves up 90 deg. Pancake air cleaners sit on top. Angled horns might clear, but then you'd need air cleaner box with 4 holes (i.e., ti or CS style). Prob easier to swap booster.

[KFunk]

I've got 40 DCOEs, with Warneford manifold (fairly long runners), and straight velocity stacks, with stock non-tii booster... so its possible. Your mileage may vary.

Kind of a pain to put things in place. I think you have to unbolt rear carb to slide one velocity stack on and off. One velocity stack rubs against booster, so I notched it a tiny bit for clearance. My Uni pod filters don't sit straight, and have to bend around the booster. No problem, just goofy looking.

[Hans]

That's another way to go = use the individual air filters on each horn. A bit noisy I suspect, and not ideal for dusty roads. I was thinking more of getting a "proper" air cleaner in there.

[sislane]

I think the depth of your manifold has to be considered. I have a TWM Manifold, Tii brake booster and stock air horns. I had to cut ~ 3/4" of the inner part of one of the air horns off, so I can get that horn in & out with everything installed.

With the air cleaners mounted (VERY TIGHT fit) I have about 1/3" between the cleaner and the booster.

Scott

[Kidasters]

Scott -

How is it that you still have the battery up front? Battery relo is a wonderful thing.

Ken

[sislane]

Scott -

How is it that you still have the battery up front? Battery relo is a wonderful thing.

Ken

I know... I've thought of doing it many times. I still have wiring to do in the trunk to finish-up my audio system, and rear shoulder belts to install... I may have everything done by my next life time.

[sislane]

I just recalled a friend's 02 where he kept the stock booster w/ side drafts. IIRC he shaved the manifold to make space. I just emailed him to ask if that was correct. But here's his engine bay. He's a lurker on here so maybe he'll chime in.

Tight fit!!

[M3M3M3]

look here

http://www.bmw2002faq.com/component/option,com_forum/Itemid,50/page,viewtopic/p,990124/#990124

and call IE to get some. not on their website.

i believe they also have an "short" manifold for more clearance.

short horns will fit with stock booster, but sock filters needed and #3 is squished.

best solution is tii booster with angled horns. even with those #3 has slight angle

[KFunk]

Really, it's not that big of a deal. I don't understand all the demand for the tii booster. There's quite a bit of room, even with long manifold. With the little short K&N oval filters (without stacks), or the ramflo oval filters, there shouldn't be any problem at all. I forget the size of my horns, but they're normal sized (not shortys), and there's barely any interference. A quick nick with an angle grinder takes care of it.

[Hans]

I think the filters make the difference. That said, 1/3" is not generous.

Has anybody measured ti manifold depth vs other brands?

[mickem02]

I run weber 45s and standard bb with no issues.

Cheers Micke

[ndog]

thats sick mick

[Hans]

Hey Mikeem - is that a choke cable under the throttle cable? If so, how does that work?

[mickem02]

Hey Mikeem - is that a choke cable under the throttle cable? If so, how does that work?

Hi Hans,

Yes its a choke cable but is not connected. I only give a little more throttle during startup. The cable was removed after I shot this picture.

Cheers Micke