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Old 12-23-2012, 12:28 PM
Jamesonsviggen Jamesonsviggen is offline
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Location: Michigan
Join Date: Jun 2007
Posts: 3,259
Mein Auto: '98 M E36/7:'06 Saab 9-5
Originally Posted by The X Men View Post
Here is a good link comparing the dyno results of the N20, N54 and N55:
It's funny, it's the lowest Dynojet dyno I have seen for an F30 N20 and they are the only source to not declare the N20 underrated. How do you explain when the dyno's of the ATS which is rated and SAE verified to be 272 at the crank, equals but does not better than the N20 which is rated at 240. That is the very definition of underrating lol.
Originally Posted by tturedraider View Post
Not personal experience, but using EPA numbers as a guide the N20 gets better mpg with the 6MT than with the 8AT and the N55 gets better mileage with the 8AT than with the 6MT. This makes intuitive sense to me, because historically the power of a four banger is better utilized by a manual transmission.

Since the vast, vast majority of N20 328i's are going to be fitted with the 8AT and the same for the N55 335i's it makes the real world mpg performance difference considerably less significant.
I tested an 8AT n55 against my 6mt N20. I could have skewed the results more in the N20's favor with the N55 being a 6mt.

I do not care what most buyers buy, I am an enthusiast and have a manual. The N20 compared to the N55, clearly has a 10-15% OR greater(when transmission is factored) MPG advantage, which is in line with the power disadvantage. So nothing earth shattering.

Originally Posted by WaxComb View Post
Funny that it's only InsideLine ( gets the 240->250 in a car provided by BMW in February in Southern California. Everywhere else is 222 hp to 233 hp.

Really, everywhere else?

I have about 20 dyno pulls on a Superflo now. From the tuners to other vids I have seen posted and my own experience, people state pretty clearly that the N20 is underrated.

You mention the Insideline dyno like it's a conspiracy.

I like how they test the N20 and the ATS 2.0 which is SAE verified at the rating of 272hp at the crank and the N20 made the same or 1-2hp MORE.

E36/7: Dinan/RMS stage 2+ blower@11-16lbs of BOOST! 18" BBS LM's, too much more to list
F30: 6mt, SOLD

'06 Saab 9-5 wagon 5mt LSD, clipped turbo, 19psi, 400ft lbs of tq

Last edited by Jamesonsviggen; 12-23-2012 at 12:29 PM.
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