Not Having A Tach Is So Frustrating

[a1awind]

i want to be able to wind out for acceleration and highway driving.  with no tach... does anyone know what rpm the 2.5 5 spd 2wd runs out to in each gear? i.e ...whats the max speed in each gear?.

 

also...does the 2.5 idle rougher than the 4.0? it seems like mine idles a little rough.

[Geonovast]

Why not switch to a full cluster?

[a1awind]

Why not switch to a full cluster?

i tried to find a thread on this....whats involved besides finding an amc full cluster?

[88whitemanche]

Coolant temp sensor and oil pressure sensor

[a1awind]

Coolant temp sensor and oil pressure sensor

my cluster has those.  the only blank gauge is where the fuel gauge is on the model with a tach.

[Blue88Comanche]

Then its pretty much a direct swap. Just make sure you have the correct year cluster. If you get a cluster from a 4.0 it will need to be adjusted for the 2.5, but I can't really help with that

[Harley]

or buy a tach for around $35

[Eagle]

Tell us what RPM you'd like to use for your shift point and I'll work up the speeds in gears.

[a1awind]

well...if i know redline rpm = speed in every gear...i can figure it out on the fly

lets say hypothetically 3500rpm = redline so what I'm looking for is ( 3500rpm = 25mph in 1st,   3500 rpm = 35 mph in 2nd .....etc etc.)

[Eagle]

well...if i know redline rpm = speed in every gear...i can figure it out on the fly

lets say hypothetically 3500rpm = redline so what I'm looking for is ( 3500rpm = 25mph in 1st,   3500 rpm = 35 mph in 2nd .....etc etc.)

 

3500 RPM is far below the redline for the 2.5L engine, but using that as a shift point you get:

 

1st ==> 17 MPH

2nd ==> 29 MPH

3rd ==> 47 MPH

4th ==> 68 MPH