BMC being fitted same day as rolling road...

[matth76 0]

Hi

 

I'm getting a BMC fitted for free the same day as I get my car rolling roaded, in March by Stealth. I was originally wondering whether there would be any difference to me fitting the BMC myself a couple of weeks before the rolling road, compared to having the BMC fitted literally just before the rolling road: would there be any performance output differences?

 

I thought the ECU would need time to relearn the new settings.

 

I've found out from Stealth that there will be no difference and I will see the performance increase straight away.

 

Stealth are doing the work...

I asked them about my question above and this is what they said (in an email):

"Would not really be a problem on the rollers if BMC fitted that day, there is no ECU learning under full throttle conditions"

 

When Stealth did my exhaust and high flow cat they did say my ECU would have to relearn the new fuel / air settings and in 50 miles or so following the fitting and rolling road session I would gain another 3-4bhp.

 

Just curious why is this not the case with a BMC induction kit?

 

Thanks for any help.

 

Cheers

 

Matt

[Kevin Bacon 5]

It would be interesting to see before and after plots with the BMC.

 

He's right, under full throttle conditions the ECU runs a preset map and the Lambda is ignored.

 

Air filters don't need an ECU reset and neither do exhausts normally, but a 6 brancher might though.