Talk Morgan Forums Morgan Sports Cars Classic Morgans (pre-CX) P4 with flash. verdict

I think it is actually illegal to alter any exhaust system in a way that it does not comply with emission standards. In some regimes an aftermarket exhaust system must be stamped that it complies with the standard and even for which vehicles it is approved. In any case periodic MOT testing should establish whether or not the exhaust system is compliant with the standard. Things become more complex with vehicles fitted with particle filters as there is not an MOT test (as far as I know) for this.
My understanding is that moves are being made to use the on board diagnostics for vehicle testing. I had heard that OBD was now being used for testing of vehicles first registered after a certain date in Germany (Heinz might be able to throw some light on that).
It is hard to imagine that anyone would really want to perform any real tuning on the CX series cars for normal road use but if any serious use of on board diagnostics is made for MOT testing on new vehicles it would tend to discourage any such tuning modifications.

OK All interesting. It may be worth just the re-map for the mpg improvement

OK Robbie that answers the question. I'm going ahead with that and think further about the manifold and CAT.
Kevin

I've just had my 2018 GDI +4 on the rollers and here is the printout. It shows quite good power and the car has a MPG of 36 to 37. But the car is not nice to drive in the 2500 to 4500 RPM range, it feels strangled. The torque on the printout shows what is happening.
I am thinking of getting the Club sport exhaust and remap but it's a lot of dosh. Does it improve the driving and how does it get on at MOT time?

Cheers
John

Hi John

I have a 2015 GDI with the clubsport map and wouldn't have it any other way, to me it's how the car should have been when it left the factory originally,

My MPG went from around 26 to 38, best i've seen is 42 which was roof down cruising at 70MPH.

I have a librands manifold fitted to the standard morgan exhaust pipe, combined I am getting around 190BHP. The car pulls like a train all the way to the rev limiter. No flat spots in power that are noticable and smooth pulling away in traffic compared to the standard map and manifold.

With just the manifold and the standard map I was getting around 160.



If you are ever in Kent, let me know and I will happily take you out for a run.

Rylan

Hawki just did the same. The car sounds great when following it . He seems happy.

John, have you asked Motoscope if they can re-map the ECU on the dyno?

An experienced tuner can make a big difference to the mapping and providing he gets both good open loop and closed loop setups you shouldn't have a problem with the MOT (assuming your cat is in good condition.

It helps if they have had some GDI experience.

I think you might be surprised how far you can get even without spending a fortune on the club sport exhaust and remap.

Have a chat to them, half a day on the dyno might be worth it.

Bob, The +4 gdi runs a locked MBE aftermarket ECU

Only MMC and the manufacturers can unlock it to reflash the map

IvorMog,
He did try to get into the ECU but it's locked, he could not even save the file to his laptop.
Cheers
John

I have a 2018 +4 and have changed the exhaust manifold for the Librands one, connected to the standard exhaust. The difference was quite something. Have not yet gone for a remap, seems MMC won’t allow the full Club Sport remap unless you have the full AR Motorsport exhaust, but they will do a remap that is between the two.