[Taskmaster]

http://www.1addicts.com/forums/showt...2#post18808892

Adding the N54 intake manifold on.

We play the waiting game gents.

[Dan Bilzerian]

November 4th is soooo far away... :/ how would the n54 manifold create a higher redline?

[hassmaschine]

it has shorter runners, which lend themselves to higher RPM power. it will obviously lose some low end torque, but with shorter gearing and a lighter car, that wouldn't matter as much.

I have similar plans for my other car, but I've hacked up a single stage manifold and want to make my own plenum.

[RJ_]

Originally Posted by Dan Bilzerian

November 4th is soooo far away... :/ how would the n54 manifold create a higher redline?

Intake manifold design typically follows the trend:

Short, fat runners = more high end torque
Long, narrower runners = more low end torque

So, if you're choking out up top, and the N54 IM is shorter and/or fatter (likely), then it might be worthwhile.

[jc5988]

damn, this is very interesting.

also perhaps someone can look into a e46 M3 CSL style intake and ALPHA N tune

[hassmaschine]

You could add a CF airbox like the CSL - you would need the inlet flap to be controlled like the throttle plate though (while N52 runs on little vacuum, it does require some). MSV70/80 is already designed to run without the MAF, it would just take some tweaking. but, CF airboxes aren't cheap.. people don't want to spend $4k on a supercharger, they probably don't want to spend that on an airbox that gives less power.

[Soccs]

Subscribed !

[W37V]

Used manifolds seem to be about $150 on car-part. com

If I had a garage I would be willing to give it a try. It takes about 2 hours to do intake swap.

Living in an apartment SUCKS!

[Mike.]

this may be worth it

[bimmerquick43321]

maybe aa can chime in they tried this and even posted a dyno

[chris82]

Originally Posted by mecbain

maybe aa can chime in they tried this and even posted a dyno

I want to see that post

[Taskmaster]

Tag Andrew

[bimmerquick43321]

Originally Posted by chris82

I want to see that post

me too it was in one of their threads, I went through one of them the other one is closed...

[Bimmer-Bob]

Meh. I have no interest in giving up any bit of low-end torque (there's not much to spare!). To me, that's one of the car's biggest flaws that I'm always looking to try and fix - I'm thinking a 3.73 rear end might help - and I'm certainly not going to try something as seemingly counter-productive as this.

Not even sure why on would bother with an N54 IM - just because it fits? At least with the 3-stage we know it was designed for the engine (for the High Output version, no less). It just seems like fiddling for fiddling's sake.

[justpete]

Originally Posted by Bimmer-Bob

Meh. I have no interest in giving up any bit of low-end torque (there's not much to spare!). To me, that's one of the car's biggest flaws that I'm always looking to try and fix - I'm thinking a 3.73 rear end might help - and I'm certainly not going to try something as seemingly counter-productive as this.

Not even sure why on would bother with an N54 IM - just because it fits? At least with the 3-stage we know it was designed for the engine (for the High Output version, no less). It just seems like fiddling for fiddling's sake.

With a race exhaust (Y at the headers) the torque is maximized at higher revs at the expense of the bottom end but on the track this matters a lot since the point is to keep the revs up all the time. Low revs on the track is meaningless as long as you can get off the grid. Otherwise it's all pretty useless on the street.

[Bimmer-Bob]

Originally Posted by justpete

With a race exhaust (Y at the headers) the torque is maximized at higher revs at the expense of the bottom end but on the track this matters a lot since the point is to keep the revs up all the time. Low revs on the track is meaningless as long as you can get off the grid. Otherwise it's all pretty useless on the street.

I think low end is useful on the street, and also for corner exit, at least in autocross. I can't tell you how many times I've come out of a corner with the throttle pinned and an instructor or whoever is telling me to give it more throttle, lol.

[justpete]

Originally Posted by Bimmer-Bob

I think low end is useful on the street, and also for corner exit, at least in autocross. I can't tell you how many times I've come out of a corner with the throttle pinned and an instructor or whoever is telling me to give it more throttle, lol.

Well yeah of course the bottom end torque is useful on the street. Trick is being in the right gear at the right revs from my experience anyway. Gotta keep it above 4500rpm and shifting by 6500rpm. Some turn complexes have been non-intuitive for shift points with some instructors recommending a shift point after the apex just before track out and others looking to shift earlier so the torque band is peaking through the apex into the straight. But all that works backward into the previous turns and their shiftpoints. Damn complicated to find the combination that minimizes all the sequential sector times.

[Taskmaster]

Originally Posted by mecbain

me too it was in one of their threads, I went through one of them the other one is closed...

Use the mobile app, you can still see them.

[kobeballer96]

Due to work, Nov 5th will be the day! I'll keep you guys updated. Thanks for following.

[SflBimmer8484]

Been there done that.. Where you been Axiom? 249whp on a 128.

[Taskmaster]

Originally Posted by Andrew@ActiveAutowerke

Been there done that.. Where you been Axiom? 249whp on a 128.

:Lol:
Can you post the graph, I've seen it before and now it's gone!

[kobeballer96]

Originally Posted by Andrew@ActiveAutowerke

Been there done that.. Where you been Axiom? 249whp on a 128.

Lol yeah!! Bmw performance is going to contact you guys next Thursday when they do the swap. I talked to viral and he said you guys can get me setup!