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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Guys whit Stg3+meth how much boost?



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      09-18-2010, 04:59 PM   #1
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Guys whit Stg3+meth how much boost?

H

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      09-18-2010, 05:02 PM   #2
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depends on the amount of meth you are spraying and what type of ign timing you are getting at the boost level. I can go up to about 18psi on a CM10 nozzle before my timing drops below 10 degrees.

fyi, i'm a stg 2.75 stock midpipes and exhaust.
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      09-18-2010, 05:29 PM   #3
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I am at about <17PSI (In the 16s) with a dual CM7 and CM5 nozzle setup.

Here is a dyno I recently did at about 16.5PSI with the above setup running a 90/10 mix with pump gas (94 octane). Timing is perfect. I can push more boost, but I find this to be the sweet spot.

Mike

P.S I should note I have all stage 3 mods, except for the stock exhaust with stock mid cats.
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      09-18-2010, 07:13 PM   #4
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Mike - same setup as me with less boost. I need to dyno and compare to your results.

Edit - I run a single cm10 instead of the dual nozzles though.
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      09-18-2010, 08:16 PM   #5
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Boost 16.5 using a M7 nozzle...I am running it relatively conservative for my mods considering what others with stage 3 are running.
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      09-18-2010, 08:52 PM   #6
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Daily driving with 94 octane pump gas with 70/30 meth, I run 16.5psi tapering down to 15psi in 3rd gear. Full stage 3 mods running JB3 map 7 with meth map 8 enabled. Log below of a 3rd gear pull.



On the track I run 19.5psi tapering to 17psi running 90/10 meth mix on JB3 map 11.
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      09-18-2010, 10:33 PM   #7
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Wow, looks like I'm pushing more boost than everyone else. I'm running 100% meth

When I get the car to the dyno I will be sure to try the high and low boost settings. For me, my timing is +10 degrees or better on 17.5 target with CM10, so if it ain't broke don't fix it I guess. Take a look at that log. 10+ degrees at boost even higher than 17.5; bet others could do the same easily. Procede progressive meth is an amazing failsafe as well.

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      09-18-2010, 10:37 PM   #8
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Very nice looking log myst, your boost and timing are gorgeous.
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      09-18-2010, 10:38 PM   #9
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I hold 17.5 psi with my M7 nozzle and 100% meth, i'll post some logs in my Aquamist review once I get my car back from the dealer (3rd HPFP and counting).
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      09-18-2010, 10:47 PM   #10
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Quote:
Originally Posted by Irishace View Post
Very nice looking log myst, your boost and timing are gorgeous.
I think I could probably up the boost a bit more to say 18 on 93+meth, but it'll hurt timing I think. Guess I need to log that and see how it does....
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      09-18-2010, 11:03 PM   #11
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Quote:
Originally Posted by Irishace View Post
Very nice looking log myst, your boost and timing are gorgeous.
+1 Log looks great!

Mike
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      09-19-2010, 04:07 AM   #12
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2007 335i  [0.00]
just got map 9 timing up over 10 with 93 + 95/5 meth/blue windshield fluid. cm 7 and cm 5 in a silicone elbow. Boost from 17-18
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