I've heard that with MSD's new digital window switch we don't need a tach adapter like with the old ones is this true?

 

yep 100% true

 

No it controls the nitrous solenoids and tell them when to activate and de-activate. For example you can choose for them to open up at 3k and shut down at redline lets say 5200.

 

Thank you. By the way you planning on adding any extras or are you just going to strap on the kit for now?

 

The switch activates nitrous at preset rpm ranges. ( Window= opens at3000 rmp / closes at 6000 rpms) IE- window of activation.

 

HAHA beat you to it LOL:loser: J/K

 

No problemo. I am too it's my first kit and I haven't even installed it or used it. But I've been researching it and the other two power adders now for almost 6 years.

 

For some reason I dont know if the stock signal is very accurate or not. I have the MSD tach driver installed inline with my ignition wires. So I use the signal wire coming from the tach driver to run all my stuff. The Progressive controller i have uses this same wire for its RPM input. When I look at my digital tach on the controller, it always tells a different reading than what my stock tachometer shows........The digital tach always shows about 100-200rpm more than the stock tach shows. So when my stock tach shows 2800....my window switch is already cutting on because my MSD tach driver is showing 3000rpm. I dont know which one is more accurate??? I would say the MSD is, but does anyone else know?

I have the switch now cutting off at 5600. Thats so it cuts off just when I need to shift. The n20 actually holds the revs for about 100rpm so you dont start feeling less power until 5800rpm. I dont like to rev the motor very high.

 

Yea it's not the signal it's the actual tach. Stock Ford Gauges= worthless.