So as per the title I attended a rolling road day today.

 

The guys that were doing the run didn't know how to set the Zed for the run and I ended up with some lower than expected numbers. They admitted to me that they weren't sure how to play it.

 

For those that do or have run an auto on the rolling road, what is the key to getting them set on the rollers for future runs?

 

Cheers,

 

B00m

iirc the auto zeds came with 267hp in stock form not the full blown 280

 

Maybe it was 280 at the crank? and 267 at the wheels?

Maybe it was 280 at the crank? and 267 at the wheels?

 

The loss is way bigger than 10hp.

that's engine power :)

It's incredibly simple. Overdrive off (3rd gear 1.000:1 ratio), find the point where the torque converter no longer slips (RPMs increase with speed) and it is also past the kickdown point, then floor it to the redline. The specific starting RPM will depend on the car spec / load / transmission condition etc. You lose a bit of info in the lower RPM range compared to a manual, but it's no major issue.

 

An auto I have at the dyno currently with an uprated torque converter and higher stall speed is good to go from 3k onwards. Real pain to get moving though!

It's incredibly simple. Overdrive off (3rd gear 1.000:1 ratio), find the point where the torque converter no longer slips (RPMs increase with speed) and it is also past the kickdown point, then floor it to the redline. The specific starting RPM will depend on the car spec / load / transmission condition etc. You lose a bit of info in the lower RPM range compared to a manual, but it's no major issue.

 

An auto I have at the dyno currently with an uprated torque converter and higher stall speed is good to go from 3k onwards. Real pain to get moving though!

 

Appreciate the info :thumbup1: