im trying to install my new msd window switch (part #8969), but i have not idea which wire on the ecu i need to tap into.

if anyone knows which wire on the ECU gives an rpm readout, please let me know. thanks.

 

PM me if you like

 

I made a post awhile back asking where I could get the engine RPM off the ECU so I could hook up an aftermarket shift light and was told there was nowhere to get the RPM. I would think the OEM tach has to get it from somewhere.

 

Can you post a pic of the final install? Would be great...and at what rpm did you set it

 

all of the wires on there are pretty easy to hook up, its just the one wire where your supposed to tap into an rpm reading.

i will post on here if i find anything out.

as for what rpms, ill prbably set it at 1800 to turn on and 200 rpms below redline for shut down.

 

from what I've heard you don't want to be squeezing below 3K.

 

You should start to apply the Ni after the end of the Tq curve to limit the amount of load on the motor....... we have week rods

I have mine set to come on @ 3.9k and off @ 6.2k and find myself short shifting because of the BIG loss of power after after the Ni is shut down.

I will try to post some pics

 

hmmmmm. Any info on the installation of the switch 8969 would be great. Plan to complete install this coming saturday

 

its actually bad to spray below 2k not 3k. either way, the 8969 will only engage once you are 200rpms above the set rpm meaning if i set it at 1800rpms, it wont turn the system on til the engine speed hits 2000rpms.

either way, since i have gotten the TC mod done, my rpms are as high as 3500-3750 when brake torquing (automatic), so spraying below 2k or even 3k is not an issue.

znitro, im curious to see your setup. some pics would be cool. oh and you got a pm.