I have a gdi plus4 and have had the ECU remapped by Williams Morgan -- fantastic result -- I had wanted to do it as I was told it would improve the MPG -- well... it did improve the MPG - from average33 to average 40 BUT .. it also gave a big improvement in grunt from about 2500revs --I do NOT have a fancy manifold, just the standard one -- Best value upgrade ever for the Mog!

I was always told I would have to have a fancy manifold for a reflash / chip on a GDI. Is this a Morgan modification or one they have acquired from elsewhere?

Was it expensive if it’s not too rude to ask?

The manifold & cat is an Aero Racing part. Originally sold as a full system, you might be able to buy the manifold & cat. But you won't get the twin tailpipe.

The whole system comes in around £2k

Librands also do a manifold & cat.

My plus 4 Duratec has a Williams manifold, exhaust and remap. I had occasion to put it on a rolling road (emissions issue) and power had increased to 155 at flywheel and torque to 148@4800rpm.

You certainly won't get the results with a Duratec that you will with the GDI.

I believe it is the club sport map, Hawki— cost circa £300
Cheers!

Gary buy the +6 in December you know it makes sense.

Good logic.

But what does Head Office say?

I had emissions issues with the Aero Racing manifold and cat (same manifold and cat as the Plus 4 SS) fitted to my car at the factory. I resolved the problem by fitting individual throttle bodies and a Omex ECU so that I could do my own tuning. How's that for logic

I was wondering how / whether these mods affect the stated European emissions ratings for the standard engines. This is becoming a issue for using the car in some cities.