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Fair point mate. It would make sense that renault wouldn't gear the box to max out at the rev limit of the standard lump. Plus they both run 17's, so that wouldn't affect the gearing.
It is indeed a beast though.
no doubting it's ability, but I had it im my head the boxes were the same. Turns out not, but I thought the megane box was limited to around 155, so I suppose it might have been bouncing on the limiter at that point?
I was under the impression they were similar. Isn't the megane box limited to 155mph anyway? That pic suggests it will go further. Although its not like shed to gest
I'd do this Matt. There will be someone local to you no doubt. It will also let you check to see if the MAP readings are ok as if the filter isn't flowing correctly it will be slightly high compared to atmosphere. Unless the MAP sensor is on the way out too.
Just a thought mate. Another possible reason for running lean could mate the air filter isn't flowing correctly. Has it been changed recently?
Mines running BTB and has never struggled to pass MOT, both on standard ECU and now EC1. Strange one.