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135idct 135idct is offline
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Default speedtech N55 single turbo 600rwhp+ - 01-11-2017, 08:01 PM

http://www.speedtech.com/bmw-n55/

less than 5000$


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Last edited by 135idct; 01-11-2017 at 08:09 PM..
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Default 01-11-2017, 08:14 PM

Looks cool. I don't like the manifold at all though.


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Default 01-11-2017, 08:31 PM

Looks like an old Chevy rams horn manifold. I would have done a log style manifold, but who knows if its even possible.


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JacquesN55 JacquesN55 is offline
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Default 01-11-2017, 11:39 PM

Would this work in a e82 N55 Dct


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Default 01-12-2017, 12:07 AM

I am glad to see another option! I know Pure at least slowed down their development but I would like to see their stage 3.


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Weehe Weehe is offline
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Default 01-12-2017, 07:55 AM

I actually like the manifold design. Pretty simple and similar to stock. Also vreat that they fit an EFR. Just sucks this is also for F series only. Never thought there would be something F series has that E series doesn't lol.
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jturboawd jturboawd is offline
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Default 01-13-2017, 08:22 AM

I like this also, both the manifold design and the turbo selection. I bet this would fit the E series, but would need a modified DP and inlet.

I would buy this if we unlocked the tuning potential of the N55. Ill hold off until that day day comes, if it never does then ill move on to a m3 or another platform. Its a shame bc I love the 135i chassis. Maybe i can go back to a 08' N54 135i.


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Default 01-13-2017, 08:40 AM

I emailed them to see about e series fitment. They actually got really good power out of that 7670. If they went up to a 8xxx or 9xxx, and we didnt have a bunch of misfires, then it would put down some very respectable numbers.


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Default 01-13-2017, 09:03 AM

Hmm, heard misfires were due to coils not being able to keep up so they were the limiting factor.

In terms of tuning I'm pretty sure boot mod 3 is already setting new ground and only able to acess more tables as days go by. Overall I don't think tuning is so limiting any more.


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Weehe Weehe is offline
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Default 01-13-2017, 09:10 AM

Misfires have always been a tuning issue for both E and F series.
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Default 01-13-2017, 09:58 AM

Quote:
Originally Posted by Weehe
Misfires have always been a tuning issue for both E and F series.
Yeah true, but now we have fuelling control, timing control, vanos control, etc via flash


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Default 01-13-2017, 10:07 AM

Quote:
Originally Posted by jturboawd
I emailed them to see about e series fitment. They actually got really good power out of that 7670. If they went up to a 8xxx or 9xxx, and we didnt have a bunch of misfires, then it would put down some very respectable numbers.
i think with a tubular manifold the car would have made quite a bit more power on the same boost due to it being way more free flowing, less back pressure etc etc. with a manifold like that the car is going to perform very similar to a hybrid setup, quick spooling but lots of heat as boost is turned up....i think the price point on these big ST kits will be very competitive in the coming months. cool to see new options and im sure this is a great kit for the price


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HydroStream6 HydroStream6 is offline
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Default 01-13-2017, 10:57 AM

I'd be interested in just buying the manifold for me E90 and fabbing the rest myself.
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jturboawd jturboawd is offline
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Default 01-13-2017, 12:25 PM

I emailed them about just the manifold. You can always go buy a JP manifold as well, which will give you longer runners. Tuning has not solved the N55 misfire and I dont think it will. Im starting to think its the OEM manifold. Consider the design differences between the N55 and B58 manifolds.

https://performancespecialties.files...011/08/n55.jpg

http://f30.bimmerpost.com/forums/sho....php?t=1133836

Then go look at the n54 stock turbo fold.

The N55 manifold, particularly on cylinder 3, 4, 5 is VERY restrictive. Look at the top of this manifold and the runner design. I think you could have restriction and re circulation but seems like it would be efficient at higher HP levels and would move the issue up to the 800+ HP range. Look at the cfm that the 7670 is rated for and look at the dyno numbers. Then go look at what singles are doing at the same HP level. Looks pretty good to me....


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Default 01-13-2017, 12:33 PM

Quote:
Originally Posted by jturboawd
I emailed them about just the manifold. You can always go buy a JP manifold as well, which will give you longer runners. Tuning has not solved the N55 misfire and I dont think it will. Im starting to think its the OEM manifold. Consider the design differences between the N55 and B58 manifolds.

https://performancespecialties.files...011/08/n55.jpg

http://f30.bimmerpost.com/forums/sho....php?t=1133836

Then go look at the n54 stock turbo fold.

The N55 manifold, particularly on cylinder 3, 4, 5 is VERY restrictive. Look at the top of this manifold and the runner design. I think you could have restriction and re circulation but seems like it would be efficient at higher HP levels and would move the issue up to the 800+ HP range. Look at the cfm that the 7670 is rated for and look at the dyno numbers. Then go look at what singles are doing at the same HP level. Looks pretty good to me....
Interesting i didn't know that, from a few larger turbo companies on the N55 they said coils were limiting and others said it was tuning. If the manifold truly was the reason maybe that's why the m2 has a reworked free flowing exhaust manifold. No clues but hope it's resolved.


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Default 01-13-2017, 12:40 PM

I did not know that..... gr..... WTF BMW. Pure mentioned that the M2 was different but didnt say how. I see online they specifically mention the manifold..... I think the small manifold adds spool and is fine at 300 crank. Those of us > 600 crank are walking eggshells to get around this.

Im pretty sure if it was tuning that terry and others would have cracked this egg with MHD and all the open XDF tables (ha 2 egg references in one post ).


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Default 01-13-2017, 12:44 PM

I agree I think the oem mani is a major part of the misfire issues.

Quote:
Originally Posted by jturboawd
I emailed them about just the manifold. You can always go buy a JP manifold as well, which will give you longer runners. Tuning has not solved the N55 misfire and I dont think it will. Im starting to think its the OEM manifold. Consider the design differences between the N55 and B58 manifolds.

https://performancespecialties.files...011/08/n55.jpg

http://f30.bimmerpost.com/forums/sho....php?t=1133836

Then go look at the n54 stock turbo fold.

The N55 manifold, particularly on cylinder 3, 4, 5 is VERY restrictive. Look at the top of this manifold and the runner design. I think you could have restriction and re circulation but seems like it would be efficient at higher HP levels and would move the issue up to the 800+ HP range. Look at the cfm that the 7670 is rated for and look at the dyno numbers. Then go look at what singles are doing at the same HP level. Looks pretty good to me....


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Default 01-13-2017, 12:44 PM

Quote:
Originally Posted by jturboawd
I did not know that..... gr..... WTF BMW. Pure mentioned that the M2 was different but didnt say how. I see online they specifically mention the manifold..... I think the small manifold adds spool and is fine at 300 crank. Those of us > 600 crank are walking eggshells to get around this.

Im pretty sure if it was tuning that terry and others would have cracked this egg with MHD and all the open XDF tables (ha 2 egg references in one post ).
Lol, yeah. From what I know bmw said the stock manifold was to restrictive for track usage and wasn't up to the task so they upgraded it. Maybe you guys could retrofit and m2 exhaust manifold? Not sure why the one speed tech has isn't sufficient though, maybe due to lack of space a decent one could be made I'm not sure.


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jturboawd jturboawd is offline
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Default 01-13-2017, 12:55 PM

Well as soon as I get settled into my new house ill be picking up one of these, a JP works btm mount or a pure stage 3 and fabbing up a water to air intercooler with short pipe route. This plus some more weight reduction will be my 2017 goal.

I cam from the earlier BMW. I had a log just like this for a s54 turbo build that was a great 750whp street machine. Looking to do the same .


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Default 01-13-2017, 02:21 PM

Quote:
Originally Posted by jturboawd
Well as soon as I get settled into my new house ill be picking up one of these, a JP works btm mount or a pure stage 3 and fabbing up a water to air intercooler with short pipe route. This plus some more weight reduction will be my 2017 goal.

I cam from the earlier BMW. I had a log just like this for a s54 turbo build that was a great 750whp street machine. Looking to do the same .
Lol nice, I'm polar opposite. I'm going to go aero, suspension, brakes, roll cage, harness, seats, flash tune aquamist meth kit, and maybe a larger turbo for my m2. I'm more orientated for track usage.


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135idct 135idct is offline
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Default 01-14-2017, 09:25 AM

Quote:
Originally Posted by Weehe
Misfires have always been a tuning issue for both E and F series.
from what i see the misfire happens with high e85 mix, for pump gas 93 or meth on moderate boost theres no misfire.
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Weehe Weehe is offline
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Default 01-14-2017, 09:56 AM

I agree, but you aren't going to get 23+ psi on 93 or 93+meth. 22/23 seems to be where misfires start, so you have to run E85.
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135idct 135idct is offline
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Default 01-14-2017, 06:46 PM

Quote:
Originally Posted by Weehe
I agree, but you aren't going to get 23+ psi on 93 or 93+meth. 22/23 seems to be where misfires start, so you have to run E85.
i don't know about E series n55, many r running 25psi+ pure stg2 in F series without misfire.
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Default 01-14-2017, 08:02 PM

Quote:
Originally Posted by 135idct
i don't know about E series n55, many r running 25psi+ pure stg2 in F series without misfire.
Ps2 doesn't flow as much air as a stage 3 turbo, so 25 psi in a stage 2 may not misfire but 25 psi on stage 3 could.

That's when restriction, fuelling, coils, plugs, tuning idk so many other factors start to cause issues.


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135idct 135idct is offline
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Default 01-14-2017, 08:43 PM

Quote:
Originally Posted by Lowon
Ps2 doesn't flow as much air as a stage 3 turbo, so 25 psi in a stage 2 may not misfire but 25 psi on stage 3 could.

That's when restriction, fuelling, coils, plugs, tuning idk so many other factors start to cause issues.
who knows, no one have stage 3 on F series and tried 25psi more or less
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