Forums » Grassroots Motorsports »

Changing a Tach signal

Hocrest
Hocrest New Reader
11/16/08 3:46 p.m.

Does any one know of a simple (cheap) way to make a 6 cylinder tach signal appear to a TCU like a 4 cylinder tach signal?

I'm looking to update the trans in an 92 SVX (6 cyl), I grabbed a transmission out of a 03 Outback(4 cyl), physically it all fits together perfectly, but I need to use the '03 TCU and the newer TCU's need a tach signal. If I feed the 6 cyl tach into the TCU the way it is, it will think the engine speed is 50% higher than it is...

Any ideas?

YaNi
YaNi New Reader
11/16/08 4:05 p.m.

Would a tach adapter triggered off the coil work?

You'll need to log in to post.

More like this

Ford Mustang Dark Horse: How does it gallop on track?

You Need This: JDM Nissan Silvia with Rad-era racing history

Randy Pobst: How to pass when you have the slower car

Cleaning our direct injection GTI’s intake with walnut blasting

It’s not too late! You can still get them these gifts.

Did we ruin our engine? This is what an oil analysis test revealed

You Need This: Tony Stewart’s flame-tastic Pontiac Grand Prix

GRM offices closed for the holidays

Can our E46 M3 run with a new Hyundai Elantra N?

What it takes to secure a license to race at the Nürburgring
Our Preferred Partners
Koni GRM
HMS Motorsport
SCCA
Tire Rack GRM
Holley
IMSA
Epartrade
Intercity Lines GRM
Sunoco GRM
Quadlock GRM
gGdATi9k6nwU8EhQcBPtl9aph576clsKUf7feGwBYgrqyYW2BXc0cnUT9EGLEd39