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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 > Few questions regarding meth+pump on stage 2 turbos



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      12-03-2020, 03:38 PM   #1
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Hello, so I am about to finish my RB two install and I'm already thinking about more power...stupid brain, but indulge me please. Anyway, I am limited to pump gas and am curious as to how far I could get with a meth kit? I believe I will be making ~500whp on 21psi, and these turbos are rated for 475-525 efficiently. Elsewhere I saw a guy make 550 on 22 psi, but I believe he was on E. What would meth+pump+25psi look like ?

Also how is owning a meth kit? What is monthly cost for boost juice? How often do you have to refill the tank? Is it a PITA?

Thanks guys!
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      12-03-2020, 11:29 PM   #2
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I have the AEM meth kit with a 1.15 gallon supplied tank. I'm running it with the BMS BM10 nozzle. The kit is great. I tried 50/50 boost juice, but I think it's window washer fluid in a red colored formula lol. There's a local shop that sells meth for $2.00 a gallon so I take a 5 gallon race fuel container and fill it up once a month. I run a 80/20 mix with a E50 blend in my fuel tank so I can't speak for pump fuel and meth, but it made the worlds difference. My high pressure fuel pump is happy and the car overall is boost and timing friendly. You should mix your own 50/50, but if you're running pump I would definitely run a mix similar to mine just to get a more octane bump. Maybe around summer time I'll kick it down to a 60/40 mix. As far as filling up the container it really matters on how you drive. I think a tank of meth lasts me for about 2 weeks since I don't really drive nuts on a daily, but don't let any of this discourage you because the car will drive and make more power with meth on those RB turbos regardless of what mix you use and get tuned.
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      12-03-2020, 11:31 PM   #3
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Quote:
Originally Posted by ///S58 View Post
I have the AEM meth kit with a 1.15 gallon supplied tank. I'm running it with the BMS BM10 nozzle. The kit is great. I tried 50/50 boost juice, but I think it's window washer fluid in a red colored formula lol. There's a local shop that sells meth for $2.00 a gallon so I take a 5 gallon race fuel container and fill it up once a month. I run a 80/20 mix with a E50 blend in my fuel tank so I can't speak for pump fuel and meth, but it made the worlds difference. My high pressure fuel pump is happy and the car overall is boost and timing friendly. You should mix your own 50/50, but if you're running pump I would definitely run a mix similar to mine just to get a more octane bump. Maybe around summer time I'll kick it down to a 60/40 mix.
Wow that's cheap! 10$ a month for better temps and timing sounds good to me. I guess since you have access to E you don't use it for power purposes ?
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      12-03-2020, 11:38 PM   #4
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Quote:
Originally Posted by Tyc0 View Post
Quote:
Originally Posted by ///S58 View Post
I have the AEM meth kit with a 1.15 gallon supplied tank. I'm running it with the BMS BM10 nozzle. The kit is great. I tried 50/50 boost juice, but I think it's window washer fluid in a red colored formula lol. There's a local shop that sells meth for $2.00 a gallon so I take a 5 gallon race fuel container and fill it up once a month. I run a 80/20 mix with a E50 blend in my fuel tank so I can't speak for pump fuel and meth, but it made the worlds difference. My high pressure fuel pump is happy and the car overall is boost and timing friendly. You should mix your own 50/50, but if you're running pump I would definitely run a mix similar to mine just to get a more octane bump. Maybe around summer time I'll kick it down to a 60/40 mix.
Wow that's cheap! 10$ a month for better temps and timing sounds good to me. I guess since you have access to E you don't use it for power purposes ?
The car ran perfectly fine with a E50-E60 blend, but I just like having that extra fuel and cooling benefit. Like you I plan on upgrading my turbos next year to something larger so having that extra fuel through the charge pipe is always a great benefit
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      12-03-2020, 11:43 PM   #5
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Stay away from Boost Juice. After watching this boring video I just started mixing my own meth.



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      12-03-2020, 11:44 PM   #6
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Stay away from Boost Juice. After watching this boring video I just started mixing my own meth.



This is why I come here first! Thanks for the info.
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      12-09-2020, 08:55 PM   #7
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Bump? Looking for power estimate with pump+meth+~25psi?
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      12-09-2020, 10:05 PM   #8
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Quote:
Originally Posted by Tyc0 View Post
Bump? Looking for power estimate with pump+meth+~25psi?



It's hard to guesstimate, but RB 2's listed on the RB website states: Recommended for 475-525whp goal.

Your best bet is to get dialed in and hit a dyno after.

Just curious, but who will be your tuner?
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      12-10-2020, 06:21 PM   #9
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Quote:
Originally Posted by ///S58 View Post
Quote:
Originally Posted by Tyc0 View Post
Bump? Looking for power estimate with pump+meth+~25psi?



It's hard to guesstimate, but RB 2's listed on the RB website states: Recommended for 475-525whp goal.

Your best bet is to get dialed in and hit a dyno after.

Just curious, but who will be your tuner?
His name is Justin Hubenak (V8Bait on forums) Rob personally recommended him to me amongst wedge and the other big guys.
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      12-10-2020, 07:54 PM   #10
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Quote:
Originally Posted by Tyc0 View Post
Quote:
Originally Posted by ///S58 View Post
Quote:
Originally Posted by Tyc0 View Post
Bump? Looking for power estimate with pump+meth+~25psi?



It's hard to guesstimate, but RB 2's listed on the RB website states: Recommended for 475-525whp goal.

Your best bet is to get dialed in and hit a dyno after.

Just curious, but who will be your tuner?
His name is Justin Hubenak (V8Bait on forums) Rob personally recommended him to me amongst wedge and the other big guys.
I'm tuned by V8Bait and you'll be in good hands
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