Generic

I'm going to see my friend that owns a Dyno shop. Figure I might as well see what the Rex is putting down.
Since its an Auto, I need to know which gear is closest to 1:1 to get the most accurate #'s out of it.

Also, any tips for dynoing with an auto? I know all about doing it in my GTP properly, just not real sure on this one. Can I hold it in a gear? Any way to manually prevent the kick-down to a lower gear?

Thanks.

Murdock

walken

iTrader: (6)

You can stay in any gear, just shift it to 1, 2, D (3), and OD (4).

Generic

Gear Ratio's, anyone?

hornbm

I belive your 3rd gear is a 1.0 ratio.

Generic

Thanks, thats what I figured, 4th/OD is like .7/1 isn't it?

Murdock

hornbm

I think O/D is .8 something.

Generic

Man, I know I've seen this info out there, I just can't find it now

I figure I'll dyno in 3rd.
Just hopin it'll break 100HP at the wheels! I'll find out saturday.

Murdock

RoninAutoBoX

3rd is a 1:1. Just keep your hold button on and it should prevent it from going into overdrive or kicking down.

RoninAutoBoX

OD is .720:1.

Generic

Forgive me, but hold button?

Murdock

RoninAutoBoX

Yeah, the hold button. The button on your shifter that engages the "hold" light on your dash? You do have one right?

rotary>piston

Key word in that sentence: MANUAL-ly

Generic

Now, I may be totally missing it, but, no. Its an S4, I have an overdrive switch, and thats it.
I'll just kick of the O/D and determine the kick-down RPM on the road. Then I'll just have him dyno it from that RPM up so it doesn't kick-down.

Murdock

RoninAutoBoX

Oh right, the S4s do have a different setup. :p