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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > Stick with the E85 or upgrade to meth?



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      01-19-2013, 01:41 AM   #1
jzingerman
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Stick with the E85 or upgrade to meth?

I've been filling up for the last few weeks with 40/60 E85 and 91 and the power has just been great. The car pulls like crazy but I'm looking to upgrade even more and make the car even faster. I've always had the idea of running meth but now I might want to actaully follow through with it. If I do install meth, how will the power be compared to filling up with e85 and running map on the Jb4 Stage 2?

Also, whats the best meth kit for the n55? I've seen some pretty good reviews on the WW meth kit but also on the Snow Performance so I'm not sure which one to go with.

Thanks for the help
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      01-19-2013, 11:34 PM   #2
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bump
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      01-20-2013, 12:23 AM   #3
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I haven't tested with meth, but I do love my e85 as well.
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      01-20-2013, 05:54 PM   #4
jzingerman
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Quote:
Originally Posted by mashimarho View Post
I haven't tested with meth, but I do love my e85 as well.
Does the e85 ever cause you any problems?
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      01-20-2013, 05:57 PM   #5
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Quote:
Originally Posted by jzingerman View Post
Does the e85 ever cause you any problems?
None thus far.
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      01-20-2013, 06:55 PM   #6
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Quote:
Originally Posted by mashimarho View Post
None thus far.
How much do you put in and what map are you running? I've been only using map 5 until I send some logs over to Terry
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      01-20-2013, 09:41 PM   #7
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40/60 map 5
With e85/93 octane.
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      01-20-2013, 11:22 PM   #8
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Quote:
Originally Posted by mashimarho View Post
40/60 map 5
With e85/93 octane.
have you tried map 7? not sure if people are using map 7 when running e85.
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      01-21-2013, 12:58 AM   #9
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I been doing a 50/50 E85 mix on map 7 for months and have sent logs to terry many times, he said logs look good. Just log and look at your ign advance.
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      01-21-2013, 11:33 AM   #10
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I want to know where the hell you guys are getting race gas.
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      01-21-2013, 02:34 PM   #11
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For those of you running 15psi+ on E85 with *NO METH*, what do your intake temps look like?

I've run E85 for the last year... about 3.5-4 gallons per tank and the sound, smell, and feel of the car is great, but without meth or FMIC my intake temps at the dragstrip are over 170F by the end of the traps....

E85 may keep you from knocking (which ultimately is the most important thing), but according to my logs, the DME reduces timing advance when IAT's rise, even if it's NOT seeing knock. Supposedly, this is the main benefit of the (N54 only) Vishnu E85 flash... it takes away the IAT ign ret. from the DME...


So what I'm saying is... E85 will not allow you to run high boost at maximum power unless you have something to reduce IATs... an FMIC will do this for single or short 2-gear pulls, but even an FMIC will struggle at the end of the dragstrip.

If you go Meth, there is arguably no reason for an upgraded FMIC (besides better flow, which gains from just flow are extremely minimal).

That's where I'm at... do I drop $1,000 on a responsibly built (trunk mount, stainless lines, etc) meth kit? ... or be happy with what I've got .... stuck at 12.80's with procede/dp/exh.
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      01-21-2013, 03:58 PM   #12
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1,000 for a trunk mount meth kit? What kits are you looking
At? The WW meth kit is around 400 if I'm not mistaken.


Quote:
Originally Posted by boostd92 View Post
For those of you running 15psi+ on E85 with *NO METH*, what do your intake temps look like?

I've run E85 for the last year... about 3.5-4 gallons per tank and the sound, smell, and feel of the car is great, but without meth or FMIC my intake temps at the dragstrip are over 170F by the end of the traps....

E85 may keep you from knocking (which ultimately is the most important thing), but according to my logs, the DME reduces timing advance when IAT's rise, even if it's NOT seeing knock. Supposedly, this is the main benefit of the (N54 only) Vishnu E85 flash... it takes away the IAT ign ret. from the DME...


So what I'm saying is... E85 will not allow you to run high boost at maximum power unless you have something to reduce IATs... an FMIC will do this for single or short 2-gear pulls, but even an FMIC will struggle at the end of the dragstrip.

If you go Meth, there is arguably no reason for an upgraded FMIC (besides better flow, which gains from just flow are extremely minimal).

That's where I'm at... do I drop $1,000 on a responsibly built (trunk mount, stainless lines, etc) meth kit? ... or be happy with what I've got .... stuck at 12.80's with procede/dp/exh.
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      01-22-2013, 08:03 AM   #13
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Those of you running e85/93 mix do you have iso or just stage 2 jb4? I have the stage 2 and im interested in doing e85 kinda scared of running meth because its my dd
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      01-22-2013, 12:17 PM   #14
jzingerman
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I have the ISO and using e85 and seems to me that everyone else that is using e85 also have ISO

Quote:
Originally Posted by emackin View Post
Those of you running e85/93 mix do you have iso or just stage 2 jb4? I have the stage 2 and im interested in doing e85 kinda scared of running meth because its my dd
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      01-22-2013, 12:59 PM   #15
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Thanks, looks like ill have to update to iso before i start running e85
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      01-22-2013, 01:11 PM   #16
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you won't make much more power using meth if you are already using e85. the only benefit will be the cooler temps. IMO, just get a fmic and stick with e85.
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