Megasquirted L28 Dyno Results

[z-ya]

Dynoed the 10:1 L28 I've Megasquirted yesterday. It a F54 with flat tops, and an N47 head. Head is stock, with stock cam. Only other mods are 6-1 header, Supertrapp, and 60mm TB. I'm very pleased with the results. The motor is in a autocross/time trial car a bunch of people in our local club built.

 

Thanks goes out to Mark Sims for posting his map in the Megasquirt Yahoo group files area. I had to make a few changes to the required fuel setting, and to the number of squirts to get it to idle smooth. Changed the TPS calibration, and also played with the warmup bins a bit. But the VE table was almost perfect. All I did was lean it out a bit at 6k, becasue there was no more power to be gained, and the duty cycle was getting close to 100%. Figure this will save the injectors (19lb) in the long run.

 

http://www.zccne.org/events-2004/dyno-2004/bad-dog.jpg

http://www.sweetspotproductions.com/psanders/images/devins.jpg

 

Pete

[sims76]

Pete,

 

That's great, I'm happy to see that someone successfully used those settings.

 

I would like to claim some great tuning intuition, but the truth is that I let Megasquirt autotune itself for most of the table and then just tweaked the WOT by watching the PLX Wideband meter.

 

How was the driveability? Did you have to play with the accel bins at all?

 

-Sims

[z-ya]

The drivability is excellent. As you can see from the dyno plot, there are no flat spots, and the AF ratio just about perfect for power. I estimate that this motor is putting out around 180HP at the crank. Awesome for an NA L28 with a stock cam, and no head work to speak of.

 

I didn't touch the accel bins. I still need to adjust the warmup bins as it hesitates when it's cold.

 

Pete