Here are a couple shots the guys took when my car was on the dyno.




I really like these little cars. There are nice lines and shapes everywhere you look.
The second picture really puts into perspective how small these cars are. I've got a picture of me standing next to it and it blocks out so much of the car.

I really wish they had taken a couple pics of the full car.

 

Great pictures! Can you post the one of you in front of the car?

 

You really want to see my tub of lard and stupid grin?

Well, here ya go...

 

and is there a dyno slip you'd like to share as well?

 

No slip. It was a dyno shootout instead of a dyno tune. Since they didn't hook up the computer there is no information other than wheel speed and wheel hp.
It made 263 hp at the wheels which is right at the calculated 20% loss with the automatic.

 

So I'm confused. Let me explain:
You got the SRT6 and a 20% loss with the automatic MZ_timeLord had 24% loss.
How about the automatic limited?
I searched and found - Elow had 173.2 HP 183.3 T = 19% loss auto?
- Golf dude 168 Hp 178 T. = 28% 6 speed
- Woody 156 Hp 90 degrees 36% loss Transmission?
- X-ed 168 Hp?
- HDDP 192 HP 215 T (race car)
What loss of power should I calculate to get the crankshaft HP on my limited automatic xfire? Oh, if I wrote your dyno numbers wrong feel free to correct me.

 

IMO the hp number of 263 in a car that weighs less than 3,100 lbs is perfect. I wish I'd taken one for a test drive when I leased my Limited, but with the cost of the car at the time of $47K, it just wasn't in my budget (oh how times can change though ) Those of you who've got the SRT-6 should really think about keeping them, especially since they only made em for one year, very collectable and what a bargain too!

 

The more HP a car puts out, the greater the drag on drivetrain and friction, so you get more loss of power when you make more power.
Also not all dynos are created equal. I can't believe Woody had a 36% loss, not possible with a manual they are more efficient than automatics. I think you forget that people where getting shut down earlier because of improper dyno runs.

 

Yes, you can ignore my run for any meaningful comparison. It was an incomplete run to 5,000 rpm and done in 4th gear which is not direct (should be done in 5th) so there will be more losses through layshaft etc.

 

My dyno run was taken on an All Wheel Drive dyno (Mustang make) with both sets of rollers connected with a belt system. I'm sure that even in Two Wheel Mode, that the calculations are a little off as the drag of the other rollers may not have been taken into account.

I'm now of the opinion that the Auto-Stick versions don't get the 5,000 RPM limiter kick-in like HDDP's and others. It may be an engine protection feature that senses the front wheel speed and then determines whether the engine rpm is too high. Derek tried with the ESP fuses pulled at the track and still had the 5,000 RPM drop-out, so I think it's only on the Manual transmissions.

Would be interesting to know if you could take the Auto-Stick ECU and put it in a Manual Transmission vehicle and get rid of that 5,000 RPM drop-out.

Cheers!

 

I think you are correct about it being a manual transmission protection feature that is not necessary on the auto. I think I have this problem licked now though with an electronic widget that simulates Golfdude's front wheel spinning shenanigans. I will be back at the dyno to test it for real when time permits. ...As an aside, I just watched tonight's Fifth Gear and Tiff was at the MB test track testing an AMG ML 'something or other'. On the skid pan he was fighting the ESP so an engineer cam out and 'entered a secret code' and completely disabled it - it was sideways all the way after that!

 

The newer Mercedes do have a dyno mode that will kill the electronic nannies. Either we don't have that option or it must be done with the dealership computer and it will reset after engine shutoff.

 

I think you're right about the manual vs auto thing... it seems that the only people who have had dyno issues are the 6 spds.

 

Did he enter the code via a laptop or button pushes on the dashboard ?