Changing the standard exhaust

MacRob · 23rd November 2020, 20:01

When changing over the exhaust from a standard system to a stainless or even just changing the rear box to a performance one, do you still re-map the management system to take into account the difference in pressure or is it not really worth it for the couple of BHP it would lose, not gain without the re-map?

steve-45 · 24th November 2020, 14:49

I don't think anyone has the engine remapped after a swop to a stainless as there is so little difference ion exhaust gas flow rates.

COLVERT · 24th November 2020, 15:31

I've not read of anybody having to remap anything through just changing the exhaust system either.---

23rd November 2020, 20:01	#1
MacRob Loves to post Rover 75 Saloon Join Date: Sep 2019 Location: Deal, Kent Posts: 264 Thanks: 44 Thanked 81 Times in 58 Posts	Changing the standard exhaust When changing over the exhaust from a standard system to a stainless or even just changing the rear box to a performance one, do you still re-map the management system to take into account the difference in pressure or is it not really worth it for the couple of BHP it would lose, not gain without the re-map? __________________ MG Rover South East admin

24th November 2020, 14:49	#2
steve-45 This is my second home Rover 75 Saloon CDTi Join Date: Oct 2015 Location: Belvedere Posts: 4,076 Thanks: 108 Thanked 1,089 Times in 774 Posts	I don't think anyone has the engine remapped after a swop to a stainless as there is so little difference ion exhaust gas flow rates.

24th November 2020, 15:31	#3
COLVERT This is my second home R75 Saloon. Join Date: Feb 2009 Location: France/or Devon. Posts: 14,003 Thanks: 3,851 Thanked 2,167 Times in 1,816 Posts	I've not read of anybody having to remap anything through just changing the exhaust system either.---