Welcome to the Corvette Forums at the Corvette Action Center!

Anyone dyno'ed their LT1/4?

Hrtbeat1

Well-known member
Joined
Nov 24, 2002
Messages
923
Location
MS Gulf Coast
Corvette
'90 coupe (gone) '96 CE LT4 Z51
I had my LT4 dynoed back in April. I am going to get it re-dynoed next week now that I've done some mods. I talked to the dyno shop and asked them why the first dyno was graphed as HP and TQ vs speed and not RPM. I was told they could not find a tach signal. I have searched the FSM and can't find anywhere the tach signal comes from. The only thing I have found is the tach signal comes from the ICM (igntion control module) and feeds to the PCM. I guess I could jumper off this wire feeding the PCM. I think its pin 13 of the black connector (I'm going off memory and not looking at the FSM.)

Where did you get your tach signal from?

:w
G
 

fredk

Well-known member
Joined
Oct 14, 2004
Messages
100
Location
Canada
Corvette
1993 White
It's the white wire in the grey connector that plugs into the coil.

Fred
 

Corvette Forums

Not a member of the Corvette Action Center?  Join now!  It's free!

Help support the Corvette Action Center!

Supporting Vendors

Dealers:

MacMulkin Chevrolet - The Second Largest Corvette Dealer in the Country!

Advertise with the Corvette Action Center!

Double Your Chances!

Our Partners

Top Bottom