Couple of quick questions

[E30SPDFRK]

The car has been running great since I put the new CPS in (knock on wood), but I still have a few little things to clean up.



1. Is an e34 o2 sensor the same thread size and pitch as an e30 one?

2. What exhaust tubing size is best for a b35? I plan on running dual pipes all the way back for clearance issues and was thinking of going with either 2.25's or 2.5's. The engine may or may not see boost in the future.
Also, how well would the o2 work if it was only in one pipe?

3. I still need to hook up the fluid level sensors (coolant, oil), but I misplaced all the wiring pinouts I had. I suck at wiring, so where do they go in simple terms?

4. What wires do I need to run and where to make the econometer work again?


I have more but I cant remember them atm.

[E30SPDFRK]

bump

[euroshark]

1. Should be, O2 sensors all seem to be a standard size and pitch. 14x1.5 or 14x1.75 or something like that.

2. The factory '89 635CSi exhaust that is hanging on my 6 right now is dual all the way back and it's all 1.75" pipe. A tweaked B35 should be fine with dual 2" or maybe 2.25" but any bigger than that and I think you risk losing the little bit of backpressure that actually helps. The O2 sensor should be fine only reading off of one bank.

3. I'd have to check through my notes... I'll see what I can find.

4. I don't have a clue about this one either. I don't even remember which color wire it is at the C104... White perhaps? Green powers the ECU (at least it did in my case), black was for the tach... I'm going with white but don't hold me to it.

[Funkmasta]

All of the swaps that we have done went with a single exhaust @ 2.5"... The rest of the wiring questions are things I leave to Chris. :)