Why is that?
Because if you leave it ON, it drops power even faster.
Why is that?
Because if you leave it ON, it drops power even faster.
421's might be ok on a full ITB'd up Clio but from what iv read they kick in at 5000rpm?? Ok for making good peak power but far less driveable and probably less ''quicker'' feeling in everyday conditions on a stock single TB set up.
could't be further from what i've seen TBH
Cat 428s for use with the standard inlet IMO. the peak power figure should be about 10bhp up once mapped, but the bigger gain will be the engine keeps pulling towards the redline rather than starting to drop off around 6600.
A 7900 limiter is very high on a stock bottom end, around 7500 should be quite enough to still change up into the power band