tim4daflow

On a 2007 Grand Prix does anyone know the best way to get to the tach signal I'm installing a msd window switch and it needs to know the rpm

rottonj

iTrader: (4)

This may or may not be of some help. If not I would call MSD. Good luck

https://ls1tech.com/forums/nitrous-o...ow-switch.html

https://ls1tech.com/forums/nitrous-o...tall-help.html

tim4daflow

I have the instructions for the msd box itself im just having trouble finding the tach output wire on the car itself to tap into to let the msd work. I see alot of the f body guys saying it the white wire in the #10 slot of the red harness is ours the same wiring configuration as theirs

rottonj

iTrader: (4)

Sorry, I have no info on that. Hopefully somebody chimes in. Post back your findings as well, with pics too if possible. And another video of that cam lol.

tim4daflow

Ill post some pics as soon as I put everything back together lol and a video I got a buddy coming over in a few hours ill see if he can help me find it

91parkave

iTrader: (4)

rottonj

iTrader: (4)

Good find!

tim4daflow

tim4daflow

Thanks for the help guys!!!!

rottonj

iTrader: (4)

Sounds really good.. You must not have the GM ignition recall yet, look at that hanging from the key switch lol .

91parkave

iTrader: (4)

Tim don't spray till you get a dyno tune or aylt least a wide band so you know where your fueling is at

tim4daflow

Im not gonna spray yet I just wanted to get everything installed and tuned at once since its $550 for the dyno tune didnt wanna pay that twice

91parkave

iTrader: (4)

That's why I learned how to tume...I'm just to cheap lol.

91parkave

iTrader: (4)

How big of a shot btw

tim4daflow

Probably 75 shot

Killerb

Don't forget to swap out plugs, BR6EF should work for a 75shot. Are you running a progressive controller?

tim4daflow

Tes sir I got new plugs and wire being installed in the morning and then hopefully if everything gpes goes as planned will be bring it to get tuned

91parkave

iTrader: (4)

Stick with tr6 for a small 75 shot. If you were spraying over 150 on a consistent basis then yea br6

Killerb

I lost power on the dyno with them plugs, engine didn't like the projected tip and heat range for some reason, however everyone is running different setups.

spawne32

iTrader: (2)

The heat range most likely, doesnt have anything to do with the tip. Just watch the plugs make sure they dont look like they are running too hot. Doubt you need a colder plug for a 75 shot.