AAN Inlet manifold on 3B??

[91_S2]

The AAN inlet manifold has the plenum inlet on the left side. This is definitely the RIGHT side if you want a short pipe from the IC (or happen to be standing in front of the car). I think the TB is a bolt on. It looks to clear the 3B dizzy. It looks like the radiator will have to be moved. It looks like it will clear the servo pump. It might require some AAN plumbing of the water lines. Otherwise, it might be a poor mans Wagner IM.

Any ideas from the jury?

[S2central.net]

You know whats weird - there has been a big flurry recently about getting the MTM inlet manifold cloned for use on the 3B and ABY engines, but I've never seen any info on any major problems with using the AAN inlet manifold instead. They are both oriented the same way, and both would require reworking of the throttle linkage, ISV & EVAP plumbing, but I don't know the capacity of the MTM plenum versus the AAN item.

Is there any serious improvement between the MTM versus AAN inlet that would justify its higher price ?

I'm not trying to pour cold water on the MTM cloning work - which should be awesome - I just realised that I've never explored the limits of the AAN part. Maybe the MTM port shaping is just better and its nout to do with capacity.

Maybe the MTM item will accomodate dual injectors. I dunno ....



Paul

[Greg_S]

I though it was because of clearance issues by the rad it wasnt used?

[S2central.net]

Fair point - Main rad or AUX rad ?

[Greg_S]

Main rad AFAIK along with the bracket that comes off from the front crossmember to the rad.

[S2central.net]

Does the MTM one work with existing radiator and bracketry ?

Gotta wonder if a custom radiator, deleting the auxiliary also, would not be a good workaround with the AAN manifold. Water rail plumbing might also be a chore, but nothing insurmountable.

If the MTM part solves the radiator clearance AND flows much better than the AAN item, then it would be the better option in the long term.

[91_S2]

The AAN inlet is somewhat in the middle of the plenum. So as I wrote, there will be issues with the main rad. The MTM inlet is in the front so it is out of the way of the radiatior but you have to lower the servo pump IIUC.

[Habib]

I have MTM IM installed. It clears the main rad.
It also clears the aux rad but you require longer hoses. I have taken out the aux rad. The IM sits nicely without interfering with the PAS pump.

Checkout Project Progress under PROJECTS for pictures.

[audiman]

AFAIK the AAN will fit the 3B, but the main rad has to be tilted back to clear the TB. Obviously some custom pipework. Not really sure if there are any gains to be had from this??

[s2avant]

I'm getting a quote for a custom alloy rad when I get round to taking some photos of the old one I've got at home (thanks Greg S ). I was thinking about either having the rad mounted at an angle or made slimmer but thicker (if that makes any sense).

One question though, is it not feasible to cut the runners of the ABY/3B manifold and weld them back on the other way round? I may be overlooking something obvious but in theory it would appear to work.

Ben

[autounion]

I've done this...

...And it's possible. But it became more difficult in reallity then what I'd expected. First the main radiator has got to be tilted backwards and dropped down. Wich resulted in alot of pipe work. The hydralic pump for the power steering is in the way. When you move that one, you need to rearange the belts. The water distributor pipe, needs to be fixed, or maybe changed into a AAN one. And offcourse some wiring. And then the intercooler pipe work.

I might have forgotten something, since this was about two years ago. I think I'd radder build/buy a custom unit.

[Markus]

The AAN IM is said to have problems with flow distribution between the cylinders.

Found this on Nordicaudi:

[martinjs]

there will be even less room than that to move the rad back on a uk 3b.
not enough room IMO.
abs unit is a lot closer to the rad due to the battery being there also.

martin

[audiman]

Thats right mate, battery and ABS are completely in the wrong places. No room now.
Will be giving this a miss.

[S2central.net]

Fair enough - topic covered....