[PrematureApex]

Originally Posted by zenmaster

I used Burger Tuning for my numbers. About 9% for M235i and 11% for S55. I think you are the one who is mistaken.

Are you looking at like a 91 octane "map 1" as the basis for your numbers? That is not showing the limits of the stock turbos, which is what we're talking about.

As per their website and dynos, on an N55, for example, their piggy can add about 60 whp (or about 80 bhp) over stock, on an other wise stock car. That's over 20%. That turbo is nearer being maxed out, hence, as shown in the plots, gains from other bolt ons are minimal.

The N54? about 70-80 whp, or 100 bhp with their piggy, on an otherwise stock car. Those go up a lot with other bolt ons, as the N54 twins have much more capacity than the N55's single snail. You'll see 500 bhp cars on stock snails. Something impossible with the N55.

There are dyno plots of an S55 putting down 80+ whp over stock, with no modifications whatsoever. People are in the mid 500 whp easy on the stock turbos, again, well over 10%.

Again, not all of their turbo engines have the same headroom in the turbos, and all of them have much more room than 10% over stock.

There's about a million threads about people complaining about the N55, and how it doesn't have nearly the same potential as the N54. Largely that comes down to turbo size.