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-   -   JB Stage 1 N55 X5 (http://www.bimmerfest.com/forums/showthread.php?t=672413)

Mau 01-25-2013 08:46 PM

JB Stage 1 N55 X5
 
Hey there. Had the JB on for about 10 days and the extra power (up to 50hp claims) is just not there. Feels a bit sluggish on bottom end. Boosting about 10 lbs. Had many turbos before and you should definitely feel 50 whp difference. Ran a few times with a friend with a '13 335i and pulled away every time. Any experiences out there?

MustGoFast 02-17-2013 11:45 AM

Quote:

Originally Posted by Mau (Post 7338952)
Hey there. Had the JB on for about 10 days and the extra power (up to 50hp claims) is just not there. Feels a bit sluggish on bottom end. Boosting about 10 lbs. Had many turbos before and you should definitely feel 50 whp difference. Ran a few times with a friend with a '13 335i and pulled away every time. Any experiences out there?

I would be surprised as well to not feel a difference, but even at 50whp a 335 is going to walk you hard, that's a HUGE weight difference to account for. I believe it's nearly 1400 lbs. An old metric that I was once told was 10lbs/hp for a simple comparison. So to really keep up with a 335 you need 140hp (ballpark) to account for the weight.

oldman12 03-24-2014 01:40 PM

Agreed with Mau.... Have you done any logs? Start there to make sure you are really getting boost. Also, what map are you on? That makes a difference. 50whp should make a difference, but you are in a 4,300 truck, so I would shoot for some intake and exhaust changes and hit 15 psi and with perfect timing, that will get you 80whp on pump gas.

mike@x-ph.com 03-27-2014 08:12 PM

i have dynod my car on stage one Jb it provided around 30 whp gains

Mau 03-27-2014 08:44 PM

Quote:

Originally Posted by mike@x-ph.com (Post 8239476)
i have dynod my car on stage one Jb it provided around 30 whp gains


Charts?


Sent from BimmerApp mobile app

mike@x-ph.com 03-27-2014 08:48 PM

1 Attachment(s)
Quote:

Originally Posted by Mau (Post 8239519)
Charts?


Sent from BimmerApp mobile app

Dont have them anymore, but this a customer'sdyno on a 328 and he got around 18 whp on stage one for the N26. the stage 1 for the N55 is even more aggressive.


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