I have a 3.42 gear in my 84 Z, what kind of rpm's should I be running in 3rd gear at 55 mph? what about 65? It seems as if it is running high. Thank you

 

Using 26" tires a 3.42 would be:

RPM 1st 2nd 3rd
1000 9 14 22
1500 13 21 33
2000 17 29 43
2500 22 36 54
3000 26 43 65
3500 30 50 76
4000 34 57 87
4500 39 64 98
5000 43 71 109
5500 47 79 119
6000 52 86 130
6500 56 93 141

Not to bad...I'm a click away from getting a set of Richmond 3.42 as I type...

Ron

 

can you help me out with this

TH350 with a 4.11 rear using 235/60r/15 tires ??

 

Tire Diameter 26.1 w/4.11 gears

RPM 1st 2nd 3rd
1000 7 12 18
1500 11 18 27
2000 14 24 36
2500 18 30 45
3000 22 36 54
3500 25 42 63
4000 29 48 73
4500 32 54 82
5000 36 60 91
5500 40 66 100
6000 43 72 109
6500 47 78 118
7000 50 84 127
7500 54 89 136

Ron

 

BTW: You might need a big *** oil cooler criusing down the interstate at 75

Ron

 

OH, OH! DO ME! DO ME!

TH350 with 2.77 gears!!!

 

:sillylol:

Using 26" Wheels w/2.77

RPM 1st 2nd 3rd
1000 11 18 27
1500 16 26 40
2000 21 35 54
2500 27 44 67
3000 32 53 80
3500 37 62 94
4000 43 71 107
4500 48 79 121
5000 53 88 134
5500 59 97 147
6000 64 106 161
6500 69 115 174
7000 74 123 188
7500 80 132 201


Looks like you need the gears(3.42) I order more than me!
I currently have 2.93, which would be great if I was racing at Daytona...

Summit
RMG-4900051 Richmond Gear Ring and Pinion $193.95
RMG-8310441 Richmond Gear Installation Kits $95.95
RMG-VIDEO Richmond Installation Video $15.95

Ron

 

geezuz no wonder it takes so long to get to 6000 RPMS in first and second! Im getting 67 MPH in first gear! whoa! and second gear.. 107!! yikes! I have shifted at 6500 in 2nd gear... amazing... this explains why I nearly finish the 1/4 mile in 2nd gear lol oh boy. I hit third then get about a second out of it and the run is over... sigh* my best so far on the track was 12.02 @ 121 but I have G-Teched over the past few days under 11.5 @ 125 with bigger tires...

 

Boy you can probably drop your track times into the 11's with a set of gears.

Yeaaa, I was out testing(HWY13 ) a couple of weeks ago, and by the time I got to around 5G's in 2nd, I was flying!!! No speedometer, but I can tell I'm criusing along fairly fast. hmmm I better check my gear ratios, yeap a 2.93!!!
My speed for RPM range is almost identical to yours, cause I have 27.4" wheels (225/70/15).




Ron

 

you guys are amazing, your like hoffman's autistic character in Rainman =D

that's not a dis, you guys are great at this =P

 

nah

sold the car

it was my 71 camaro

but the motor was going as well as a few other things.... no wonder why though huh ?


driving the freeway day after day