Def's Dyno Runs, A learning experience Options

[Defgeph]

Hey guys,

I went to the dyno this weekend to find out what numbers I'm putting down. I came out very impressed. I was thinking along the lines of 230 hp to the wheels.

New Dyno Video 10MB

At 17.5 PSI, I put down 246HP and 261 TQ. Just insane.

Look at one of my run files below. I am still having trouble tuning my boost controller. You'll notice that after 4,000 rpm I have very strange spikes in boost. The theroy we have is, the controller is opening and then closing my waste gate door over and over after 4K. In the next few weeks I'll be tweeking the profec to run a constant number, then go back to the dyno. I believe I can squeeze out a couple more horses once this thing is set properly.




If you have any suggestions, I'm more than happy to hear them.

I'd like to again thank Manny, Jenn, and Dustin. With out them I would'nt be sharing this information with you. Again guys thank you, anything you need I'm there.

6GC. Without this place, I wouldnt have what I have. A thank you goes out to you as well.


Thanks ,
DEF

[presure2]

art, one thing we need to look at is that when we look at these dynos, is the fact that we're only seeing one small slice of the ecu map, WOT only.
i would imagine that toyota set the maps so rich in the WOT part as a saftey measure, to protect the engine from us dumb americans..lol
i would think that on a load bearing dyno like the dyno dynamics ones, at diffrent load points we'd see huge diffrences in way the maps are programed as far as efficency, and a/f raitos would reflect that i would think.
IMO there are 2 things that makes jeffs run look so much better as far as A/F ratio is concerned.
one is the JDM RC ECU, which IMO just has an even more agressive tune than the normal JDM ecu, and a MUCH more agressive one than the USDM.
and, the fact that on that run hes running an average of around 15.5 or so psi with like a 17.5 psi peak, hes just using up more of the available fuel, and IMO thats not even that big of a deal, there are quite a few guys on mr2oc that have runs @ 15psi+ with richer a/f's then what jeff has.

[jgreening]

The a/f at WOT in a USDM 3sgte is set that way for engine safety, reliabiliity, and infrequency of warranty claims.

In short, I agree with everything Manny has said except this:

the fact that on that run hes running an average of around 15.5 or so psi with like a 17.5 psi peak, hes just using up more of the available fuel, and IMO thats not even that big of a deal

If your a/f ration is leaning out due to maxing out your injector duty cycle, you are playing with FIRE!!!!!! I am quite confident that the clean a/f line is attributable to the ECU.

[presure2]

The a/f at WOT in a USDM 3sgte is set that way for engine safety, reliabiliity, and infrequency of warranty claims.

In short, I agree with everything Manny has said except this:

the fact that on that run hes running an average of around 15.5 or so psi with like a 17.5 psi peak, hes just using up more of the available fuel, and IMO thats not even that big of a deal

If your a/f ration is leaning out due to maxing out your injector duty cycle, you are playing with FIRE!!!!!! I am quite confident that the clean a/f line is attributable to the ECU.

ohh i agree with that 100% jay,
im not saying hes maxing out, im just pointing out the fact that @ 15psi your gonna use more of the available fuel than @ 10psi.

[jgreening]

The a/f at WOT in a USDM 3sgte is set that way for engine safety, reliabiliity, and infrequency of warranty claims.

In short, I agree with everything Manny has said except this:

the fact that on that run hes running an average of around 15.5 or so psi with like a 17.5 psi peak, hes just using up more of the available fuel, and IMO thats not even that big of a deal

If your a/f ration is leaning out due to maxing out your injector duty cycle, you are playing with FIRE!!!!!! I am quite confident that the clean a/f line is attributable to the ECU.

ohh i agree with that 100% jay,
im not saying hes maxing out, im just pointing out the fact that @ 15psi your gonna use more of the available fuel than @ 10psi.

True, but all else being equal (i.e. I don't know the intricacies of the tuning of the Toyota ECUs) the a/f ratios should be similar if you have enough injector. The ECU will only send an amount of fuel required for the given airflow. I would suspect that for any given 3s on the AFM and stock ECU and fuel system, the a/f at WOT, if different, would be richer than off-WOT due to the limits of the AFM and programming the ECU for reliability.