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View Full Version : TB swap question...


BMe30
03-10-2009, 07:26 PM
if i were to use a bigger TB on my m42 from any other bmw motor.. other than making an adapter plate.. would i have to fit the TPS sensor from the m42 TB to the bigger TB?

Just throwing it out there...

SamE30e
03-10-2009, 10:33 PM
Depends, check the part number of the TPS on the new throttle body.

BMe30
03-10-2009, 11:47 PM
makes sense...

Duct_Taper
03-11-2009, 12:10 AM
What bigger TB do you want to fit? I'm no expert, but I have heard that the M42 throttle body (total area) is actually pretty large for the engine size. There are a few things you can do to optimize it... check on M42club.com, I know there was a thread about it there somewhere.

BMe30
03-11-2009, 05:40 PM
i'll take a look... i think i remember reading something like that months ago on there...

SamE30e
03-11-2009, 06:02 PM
The m42 is a 2 stage throttle body, look at it, it has 2 butterfly valves. Don't know if 1 large one would make it run very much better.

BMe30
03-11-2009, 06:05 PM
i'll see if i can get a hold of a few TB m42 and what i can get.. and compare a few things.. not sure what i'll find or how long it will take.. but i'll keep you guys posted