Talk Morgan Forums Morgan Sports Cars Morgan Three Wheeler & Super 3 Wrapped headers, removed cats and exhaust baffles

Good write up - hadn't thought of tying off the wrap and winding the header towards it. It's amazing just how easy it is to take off and replace the headers after you've done it for the first time though.
As for the cats; I'll be leaving mine in but if I manage to acquire a set of headers that don't have them so that there can be an annual swap for the MOT then...

Hypothetically i wonder what size hole saws?

Done quite a few wraps. Never heard of or considered removing the headers to accomplish it.

I think they were off to pull the cats, and once off, why not wrap them without the suspension in the way?

Great post and the dragon looks an awesome bit of road.

For info, a 3 wheeler does not require a UK MOT emissions test - confirmed by Andymot (our "tame" MOT tester) with a link to the MOT regulations in another thread.

I would agree but that's not what he said.

I realize this is an old thread. But I'm curious if removal of the cats and baffles plus the addition of a less restrictive intake, a) essentially results in a 'MMC Stage 1' upgrade, b) if it requires an ECU tune or does the (US-spec) ECU have enough bandwidth to adapt, and c) if a G56 Stage 2 upgrade that includes an ECU tune would be happy layering on top of the 'homemade' Stage 1.

Asked another way, would this mod save the cost of a Stage 1, particularly if the goal is Stage 2 anyway?

Don't you need the Cam upgrade to accomplish this?

There's a bit of inconsistency in the stages depending on whether you are talking MMC, G56 or Krazy Horse. Basically the standard ECU should be OK until you upgrade to the 569 cams.

MMC/G56:

Stage 1: Exhaust and air filter, fine with standard ECU
Stage 2: Add upgraded cams and ECU

KH:

Stage 1: Exhaust and air filter, retain standard ECU
Stage 2: Add ECU and dyno tune
Stage 3: Add cams and dyno tune
Stage 4: Add 128ci big bore kit, roller rockers, ported cylinder head, throttle bodies, high flow injectors and dyno tune

Correct. Which includes an ECU reflashed for the cams, so wouldn't it assume the engine is breathing better too and factor that increased air flow into its equation?

So if the goal is Stage 2, why not just help the engine breath better on your own? If the noise proves unacceptable, buy a set of Stage 1 pipes. Does this make sense? I'm trying to figure out why a MMC Stage 1 is worth $2k.....