RPM signal converter for M3 cluster with 6 cyl swap $120 OBO

[BigD]

Want to get an M3 cluster to use the 8k tach with your DOHC swap? You'll need one of these. Digitally converts the signal to a new frequency to fool the M3 cluster into thinking it's a 4-banger. Without it, your revs will always read too high.

Would also be willing to provide guidance/help installing it. Not hard but helps if you know which wires you need to tap into (DME and car side).

[mbonder]

definitely interested, have any m3 clusters as well?

[BigD]

Just the one in my car :( There are usually a couple for sale if you look around (here, s14.net, ebay [although that place is useless now])

[StereoInstaller1]

Hey man, just so you know, there is a great spot to catch the tach signal right under the IP, immediately left of the steering column. It is the only black wire in that harness.

[BigD]

bump

[mbonder]

Still interested, any pics of this converter?

[BigD]

I can take one tonight if you'd like. It's just a box with 4 screw terminals (+, ground, rpm in, rpm out).

[DTMbimmer07]

is this nessesary to use if i have a m20?

[BigD]

It's necessary for any 6 cyl engine that you plan to use with the E30 M3 cluster.

[dsobering47]

Cant I just plug in an e28 m5 cluster plug to the e30 m3 cluster and it will convert it correctly?

[BigD]

Dunno, if you have an M5 and M3 cluster kicking around, you can try and report back to the tech forum. This is a FS thread.

[BigD]

bump

[dsobering47]

thanks for the valuable input. if the answer to my question turns out to be a "no", then I would have purchased your convertor.

[BigD]

That's great. Please stop cluttering the thread.