low power !

[grizz]

Back on the r/road tomorrow.

[Fen]

I'm keen to hear how much difference you get with the MAF replaced.

[grizz]

Well , it made 453 bhp but the air temp was 10 degrees hotter than last time so that could add a few more hp .

[dace]

Looking better Grizz...................

[Fen]

Much better - was that remapped at all or just a straight re-run with the MAF replaced?

[grizz]

just a maf , i'm getting it remaped on friday after i've fitted a new bosh fuel pump .

[Wolverine]

how much does a MAF cost out of interest ?

[grizz]

There are two on the rs6 , I paid £65 + vat each from the dealer .

[skiwi]

Well , it made 453 bhp but the air temp was 10 degrees hotter than last time so that could add a few more hp .

hotter air will rob hp - but i think that is what you are saying?

[Fen]

There are two on the rs6 , I paid £65 + vat each from the dealer .

Is that outright or exchange? May as well get a pair ordered whatever if you got that amount of power from just the MAF as that's not far short of what I'm short.

The two runs were on the same dyno, jus different days and ambient conditions?

[grizz]

FEN ,
That's exchange , yes it's the same dyno. I'll be back on it next week.

[Fen]

Cool - I'll be ordering a pair of MAFs then.

[jssmith22]

I don't fully understand. Surely the rolling road measures power at the wheels and 450hp is at the crank...if they underestimate the drag of the quattro system then you might easily have 450hp+ at the crank. Am I misunderatanding? also from what I know it's very difficult to keep turbo cars cool enough on the rolling road to get the right power... even with big fans in front of the engine it's not the same as on the road.

[Fen]

They should calculate the transmission losses rather than estimate. I'm not sure what you're getting at though?

[grizz]

I don't fully understand. Surely the rolling road measures power at the wheels and 450hp is at the crank...if they underestimate the drag of the quattro system then you might easily have 450hp+ at the crank. Am I misunderatanding? also from what I know it's very difficult to keep turbo cars cool enough on the rolling road to get the right power... even with big fans in front of the engine it's not the same as on the road.

That right , when i did all the runs i get a plot of the wheel bhp as well , the last one was 361bhp @ the wheels .
TBH the power could be 10% up or down but I'm using it as a bench mark for the remap .
I'm getting it done tomorrow so i'll get it back on the r/r next week .