m3 throttle body?

[bimmerfreak87]

will an e36 m3 throttle body fit my 98' 323is (with m50 manifold) and if so is it a bigger bore

[SHAHAB323IS]

it would fit because they are the same thing

[bimmerfreak87]

there is now diffrence in inlet size?

[SHAHAB323IS]

no

[WarNox]

whats so special about a m50 manifold?

[bimmerfreak87]

are you serious?! haha well when you only have a m52 engine a m50 manifold is very special. it has like 60% larger inlets than the manifold that comes stock on cars such as mine. it is a fairly large increase in performance for a bolt on. the only down side as far as i know is that you lose like 1% power in your lower rpms but the rewards out weigh it. i have heard it complete changes your car.

[SHAHAB323IS]

Originally Posted by WarNox

whats so special about a m50 manifold?

larger intake runners flow more air

[nukeduster]

Larger shorter intake runners, you get higher volume air flow but lose the low range high speed flow of the longer m52 intake runners.

Basically: m52 manifold feels faster on the street because your "under the curve" torque will be higher, but a m50 manifold will net you more dyno hp because at high high revs you'll make a few extra hp.

on the street i still prefer a m52 manifold myself, even if on dyno shootouts it'd make a few hp less.

[WarNox]

hmm, there must be a reason why bmw decided to change the mainfold on the m52 engines. alright, thanks for your replies!!

[bimmerfreak87]

i have always woundered why they changed it. i know they changed it when they went OBDII but still i always thougth the idea was bigger is better haha

i have heard that you can get as much as 25 more hp. that might not be true but i would like to think so.

[94BMW325i]

Nice gains can be made with software.

[bimmerfreak87]

yes indeed. i have heard the shark injector is nice. what do you think

[Furious]

if you want a bigger bore on your TB, you can check places like westcostriots. or you can get someone local to do it for you. its not overly hard to do but you should still find someone knowledgable enough to do such a task. and yes an m50 with a proper tunning will yield a decent gain.

[gotKRAUT]

dont pass up dinan as an option too, they make some pretty inexpensive TBs too, like $240 or so last i checked and they claim about 7-8hp

and the M50 monifold is not more than a 10hp increase on a M52B25, and i would highly recommend software

[bimmerfreak87]

ya i am getting software after i get all the other mods on.