So the 200 was running a bit rusty

Just been in to rescue tuning for a bit of work to the 200. Service exhaust blowing and remap. Paul put it on the dyno was running pretty poor. But he worked his magic and got it back up to 189.8. Need more power think it's time to BOOST!
 

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Wow that's a pretty big jump! Was it dyno'd before the work on the exhaust to give 157bhp? Was it just the exhaust blowing causing the poor performance or were there any other underlying things?
 
Wow that's a pretty big jump! Was it dyno'd before the work on the exhaust to give 157bhp? Was it just the exhaust blowing causing the poor performance or were there any other underlying things?

Think it was mapped after the exhaust mate at first he said he struggled to get it anywhere near 190 but he tried for the 2nd time and managed to do it. At 1st he thought my cat had collapsed but checked and was fine.
 
Think it was mapped after the exhaust mate at first he said he struggled to get it anywhere near 190 but he tried for the 2nd time and managed to do it. At 1st he thought my cat had collapsed but checked and was fine.

Must have been something tangible done to make it gain 30bhp?