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2Addicts | BMW 2-Series forum Technical Topics N55 (M235i) Engine, Transmission, Exhaust, Tuning What options for maximum hp and torque gain without funny fuel?

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      06-20-2015, 10:47 AM   #1
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What options for maximum hp and torque gain without funny fuel?

I'm wondering, I have jb4 right now wanting to get a dp soon, what other bolt ons will help push another 30-5030-50whp on top of the jb4 and catless dp and why exactly?

I will only run 91 or 100+ no e85 or meth.
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      06-20-2015, 11:50 AM   #2
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Lol. Get educated. Come back then. No funny fuel. HA.
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      06-20-2015, 11:51 AM   #3
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30-50whp on top of the jb4...meth Injection. Nitrous.
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      06-20-2015, 09:59 PM   #4
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Quote:
Originally Posted by daveslaine View Post
I'm wondering, I have jb4 right now wanting to get a dp soon, what other bolt ons will help push another 30-5030-50whp on top of the jb4 and catless dp and why exactly?

I will only run 91 or 100+ no e85 or meth.
Before worrying about fuel,you need an intercooler and charge pipe.
After you get both these mods, you can run map 7 with race fuel for max power and map 1 as a daily driver with 91 octane
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      06-21-2015, 03:31 PM   #5
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Quote:
Originally Posted by mike@x-ph.com View Post
Before worrying about fuel,you need an intercooler and charge pipe.
After you get both these mods, you can run map 7 with race fuel for max power and map 1 as a daily driver with 91 octane
Yes these are my mods I was thinking about too. The car has trouble performing I've noticed above 90f.

Do you have a rough estimate of hp and tq gains with dp, cp, intercooler, jb4, on 91 and the same mods on 100 map 7? Are they enough to match stock m4?
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      06-21-2015, 04:08 PM   #6
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Quote:
Originally Posted by daveslaine View Post
Yes these are my mods I was thinking about too. The car has trouble performing I've noticed above 90f.

Do you have a rough estimate of hp and tq gains with dp, cp, intercooler, jb4, on 91 and the same mods on 100 map 7? Are they enough to match stock m4?
Intercooler and CP will not add power, they will add reliability and consistent power delivery.
Here is a dyno graph with all these mods and map 7. Very close to stock M4, with more torque
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      06-21-2015, 05:15 PM   #7
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      06-21-2015, 05:50 PM   #8
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Quote:
Originally Posted by mike@x-ph.com View Post
Intercooler and CP will not add power, they will add reliability and consistent power delivery.
Here is a dyno graph with all these mods and map 7. Very close to stock M4, with more torque
I highly doubt map 1 on the n55 on 91 has more torque than m4 something about this dyno doesn't seem right.
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      06-21-2015, 06:32 PM   #9
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Quote:
Originally Posted by daveslaine View Post
I highly doubt map 1 on the n55 on 91 has more torque than m4 something about this dyno doesn't seem right.
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      06-21-2015, 07:32 PM   #10
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I made almost 500wtq on e85 & meth. n55
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      06-21-2015, 08:56 PM   #11
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Quote:
Originally Posted by JibHonk View Post
I made almost 500wtq on e85 & meth. n55
What does 1 need to add e85 and meth and i havent seen gas stations with these fuel types.

500wtq????????????

does all the added torque increase 0-60 times? what would you guess it to be? and can you trap 1/4 mile under 12??
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      06-21-2015, 09:00 PM   #12
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Originally Posted by jeffery_stearns View Post
blasphemy
So, up to at least 80mph, are you saying my M235 might feel faster off the line on jb4 map 1 than an M4???
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      06-21-2015, 10:17 PM   #13
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Haven't done a drag day since adding the meth. Last time I ran 12.5 @ 114. 60' sucked @ 2.3~. Car definitely has 11 second passes in it. You need e85 for its octane and cooling properties. It let's you run a little leaner, higher boost safer. E85 and race gas have similar gains to offer just different avenues. Methanol is also a power adder and charge cooler. I run a 50/50 blend. For e85 I mix 6 gallons of that with about 6.5 gallons of 93 octane for what should equal about e45/50.
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      06-21-2015, 10:21 PM   #14
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Never driven an M4, Map 2 feels pretty ridiculous though! always puts a big smile on my face.
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      06-21-2015, 10:47 PM   #15
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Quote:
Originally Posted by JibHonk View Post
Haven't done a drag day since adding the meth. Last time I ran 12.5 @ 114. 60' sucked @ 2.3~. Car definitely has 11 second passes in it. You need e85 for its octane and cooling properties. It let's you run a little leaner, higher boost safer. E85 and race gas have similar gains to offer just different avenues. Methanol is also a power adder and charge cooler. I run a 50/50 blend. For e85 I mix 6 gallons of that with about 6.5 gallons of 93 octane for what should equal about e45/50.
Any idea on 0-60? I know people hate it but I like using it as a measurement of acceleration. Car and Driver hit it in 4.3 stock and I've hit it at 4.4 I believe on map 1 as well


500wtq is a lot does it give a better 0-60 time or more pull towards the speed limiter?

Edit: someone seriously needs to time a 0-60 on a nodded car
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      06-22-2015, 09:03 AM   #16
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Quote:
Originally Posted by daveslaine View Post
Any idea on 0-60? I know people hate it but I like using it as a measurement of acceleration. Car and Driver hit it in 4.3 stock and I've hit it at 4.4 I believe on map 1 as well


500wtq is a lot does it give a better 0-60 time or more pull towards the speed limiter?

Edit: someone seriously needs to time a 0-60 on a nodded car
Bump this
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      06-22-2015, 10:05 AM   #17
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Quote:
Originally Posted by daveslaine View Post
Any idea on 0-60? I know people hate it but I like using it as a measurement of acceleration. Car and Driver hit it in 4.3 stock and I've hit it at 4.4 I believe on map 1 as well


500wtq is a lot does it give a better 0-60 time or more pull towards the speed limiter?

Edit: someone seriously needs to time a 0-60 on a nodded car
Well, up to a point it'll give a better 0-60. 0-60 needs power, torque (enough to compliment the vehicles weight lets say) and most importantly: traction. Traction is achieved via either wider rubber or all wheel drive (which is more rubber under power). An s drive m235i will probably max out at 4.2 seconds 0-60 on stock width rears. x-drive could probably dip into 3.9 territory. Where the torque helps is where its developed in the rev range. If it is given down low (like it is with the N55) it'll help you off the line and out of corners. Developed up high will help your top end. But gearing is just as important.
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      06-22-2015, 12:36 PM   #18
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Quote:
Originally Posted by daveslaine View Post
Any idea on 0-60? I know people hate it but I like using it as a measurement of acceleration. Car and Driver hit it in 4.3 stock and I've hit it at 4.4 I believe on map 1 as well


500wtq is a lot does it give a better 0-60 time or more pull towards the speed limiter?

Edit: someone seriously needs to time a 0-60 on a nodded car
Understand most car mags use a 1 foot rollout when timing 0-60. This improves the 0-60 by about .3 seconds or so. So, the true 0-60 they got was closer to 4.6-4.7, not 4.3. With RWD and stock tires you will have a tough time getting much better than where you are at 0-60, adding power will probably make it even more tricky to hook up. Street drag radials over just wider stock-like tires will be a better bet for improved 0-60.
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      06-22-2015, 10:20 PM   #19
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Last edited by FSociety; 06-23-2015 at 11:36 AM..
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      06-23-2015, 10:37 PM   #20
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daveslaine
How do you record your 0-60? Have video of it? I am @ 355whp now and I am hard pressed getting under 5sec with a gtech. I usually torque break launching in 2nd gear DTC off - there are probably better ways to do it.

PS: A MUCH better way to measure performance is 60-120mph
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