e-i tach conversion

[alpineE30]

I was wondering if anyone has put a 325i 7k tach in a 87 325 that has a 5k tach?

[ldsbeaker]

Yes, it's been done.
Here's the write-up that I'm following.

http://www.strictlyeta.net/technical/tachometer.html

[Garageaholic]

Yeah, just change the chip in the front of the cluster. It controls the tach.

[mitch500]

ok well when i bought my e30 the cluster was bummed, i took it out and it had the one with the chip in the front. when i got my new cluster it didnt have one so it must have been a pree 12/85 cluster and my car was a 87. it still worked when i put it in.

[alpineE30]

Yeah, just change the chip in the front of the cluster. It controls the tach.

The write up said to keep your original coding plug for accuracy and just use a different take the same maker of the cluster though.

[alpineE30]

Sorry about that i meant (different tach but same maker of the the cluster though.