Top speed in 1ST gear for stock Z? - ZR-1 Net Registry Forums

rush91 · 09-11-2017

I've seen where the top speed for stock Z should be around 58-60 MPH.....A few times this weekend I got in a few stoplight races. The highest I could get was around 50 MPH, and that was shifting at 7000 RPMS. I know I have a vacuum leak under the plenum, and I've also noticed the car missing or cutting out a tad, when getting on the throttle.... Being a novice mechanic, I'm thinking it maybe time to check the plugs and coils? Coils and wires are MSDs, plugs I have no idea about. Injectors have changed out, as well as new chip from Marc H.....Any ideas where to start?

09-11-2017	#1
rush91 Join Date: Feb 2016 Location: Carterville Illinois Posts: 854	Top speed in 1ST gear for stock Z? I've seen where the top speed for stock Z should be around 58-60 MPH.....A few times this weekend I got in a few stoplight races. The highest I could get was around 50 MPH, and that was shifting at 7000 RPMS. I know I have a vacuum leak under the plenum, and I've also noticed the car missing or cutting out a tad, when getting on the throttle.... Being a novice mechanic, I'm thinking it maybe time to check the plugs and coils? Coils and wires are MSDs, plugs I have no idea about. Injectors have changed out, as well as new chip from Marc H.....Any ideas where to start?