Vishnu tune

[ridin135]

Is anyone just running the Vishnu tune? I have done a search and have not come up with any results or reviews. If someone is, what is your quick review of it? Also can anyone post there review of the m3 pwm meth kit? I have ran Vishnu pps meth and tune on my 135 and z4 but was wondering how the na tunes were. Also can anyone comment if the tune works on a 2013 model as the website states only up to 2011?

[pbonsalb]

I have been running it for close to a year. Seems to work well. I did change to a trunk mount pump and tank for the meth. I think it helps most in hot weather. The tune primarily changes ignition timing and AFR.

Other tunes do not use meth and are a flash rather than a piggyback. They make additional software changes, including to the VANOS. Most people agree, however, that the latest factory tunes such as on your 2013 car, are very good out of the box and are not leaving much power on the table for a tuner.

I really think these cars lose power in hot weather due to the 12.0 CR and pump gas octane. There is really nothing the typical tune can do about that. The water/meth cools the IAT and increases the octane.

[TMR]

I have it on my car and it made great power and car always felt consistent. I had a flash tune and flashed back to stock and did the proceed with meth. Works great.

[oct1285]

I have the tune plus meth and I'll echo the statements above that the power is consistent and linear.

It may or may not be related but my car threw an increased emissions code. I'll have to see if its related to the procede.

[ridin135]

Has anyone tried the bpm tune and can compare it to that?

[whats77inaname]

Originally Posted by ridin135

Has anyone tried the bpm tune and can compare it to that?

Longbow use to have a Vishnu but then removed it to go BPM tune. Might want to hit him up if he doesn't chime in on this thread.