Quote:
Originally Posted by RPM90
Interesting.
So the only way stage 2 can get the added power is by running a higher octane fuel.
I understand why higher octane will allow a higher boost level and perhaps more timing, but is this suggesting that the N20 has reached a limit with stage 1 and regular pump gas?
IOW, there are no more gains to be had from the stock engine using up to 93 octane fuel?
Also, is stage 1 tuned to take advantage of 93 for the areas that have 93?
Or, is stage 1 tuned for 91 to cover the whole US as that is the highest some people can get?
What about a 100 octane tune or option for those who don't want to run E85 and get less MPG?
I realize it's a piggy back so not much tuneability for different octane fuel.
But, it sure would be nice to have optional piggy's like one for 91, for 93, and for 100, and then the E85.
That way people can choose which one based on the fuel they can get.
I had a JB+ in my 135i and it had an adjustment for higher boost. I'm guessing that adjustment also allowed for higher octane fuel by turning the setting to maximum.
Does the tune for N20 and N55 have the same adjustment?
|
They had a dyno run with a race gas on stage 1, there is a file for it, I think it did 290whp with stock hardware.
And the stage 1, as explained allows adjustment of 3-4psi depending on if you are running 93 or not.
Stage 2 they say will have small gains if hardware is unchanged and running 93, maybe 10whp more.