Quote:Read all about the Twin Weber car here: Ernie's Twin-Weber Downdraft

Is it possible to get a picture with the camera 'in' the engine bay, approximately at the height of hte centreline (throttle shaft ) of the carbs looking back toward the firewall. It's hard to tell from the picture (and I've looked at a couple of others I have of rhd 1200s with webers but none have the right angle to 'tell') but how high is the master cylinder - will the carbs collide with the master cylinder itself, or with the reservoirs?? If it's the latter, some remote mount reservoirs are surely an option.

How about a combination of that, and a cut n shut re-weld/tweak of the inlet manifold to make the carbs very slightly downdraught, or with a _very_ subtle S bend to get more height??

I'd go even further - if (via a combo of the above stuff) you get them to fit, you could run 90 degree bends as the 'trumpets' and then have them radius out and all sit within a common air filter/plenum arrangement. perhaps not 100% ideal, but since the 90 degree bend would be dry air, not fuel suspended therein, it shouldn't be near as detrimental as it might otherwise seem)




Obviously I stink at mspaint, but you get the idea. It needed be a big oval plenum or air filter - perhaps a pair of oval ones - afaik they are available at approx the right dimensions to fit a dcoe weber or the like - you'd just be making a custom base plate with the 90 degree curves to mate it together.

It might even be of advantage - on a streeter, it effectively lengthens the runner length (a little bit at any rate) and likely the a-series could do with that - i.e. a runner length closer to what it would need for it's likely working rpm range.

I've seen a twin down draft manifold in Japan, for webers looks a treat, I'd have one Just coz...

Mike, Were you referring to these? twin IDF webers on manifold to suit A series. In many ways the IDF weber carbs are a short version of the IDA Weber.

hell yea, that's them, I'd have them just because their different, but thats me.. ha ha

I have a twin DCNF manifold off a triumph spitfire at home and it is very very similar to the one pictured for the IDF carbs. I reckon with a bit of talented machining, it could be modified to suit the A-series cylinder head. I should post up a pic of it....

Na, dual sidedraft webers won't fit an LHD 1200 -- even without the bells they hit the brake master cylinder body.

There is a pic in the Tech wiki (under carbuetors) with an angle manifold dual-weber setup. These are not angled up, but angled forward.

DD, you mean these bad boys..

I've got a Wilwood pedal box that mount the Master cylinders facing backward under the dash. They're really small and can fit with a little rearranging under the dash. Then the reservoirs are remotely mounted on the firewall.

on the other hand you can use a van setup or an early suzuki fronte hatch one.
All good but the wilwood stuff is top notch.