2016 Tacoma Dyno Time!!!

yup, to get an accurate dyno you need to disable all the engine assists and efficiency systems.

 

BTW, thanks to the OP for doing this and posting results. Any data is better than the none that we've had. Just trying to interpret the results and what they mean.

 

I think that "dip" in the 3500-3900 range is due to the D4-S. Not sure why...emissions maybe? It looks the same as the mid-range torque dip in the Subaru BRZ/Scion FR-S engine (which has D4-S). Not sure if that was ever tuned out.

 

the frs dip was tuned out, encouraging, I was looking for that same dyno lol

 

Please enlighten me why that's hilarious?

 

It's a small sample size but when comparing his dyno with the 4.0, it produces much more hp and more torque at its peak numbers, and also at the 4.0's peak outputs(5200 rpm for hp and 4000 for tq), so the mini van engine that likes to rev, has more punch at the 4.0s peaks and at its own peaks *on this dyno *on this truck

 

2780# car doesn't need much power, although a little more would be fun.

 

I think the torque dips can be a result of valve timing. I have heard torque dips can also be related to emissions programming. Way over my head. This is a good explanation on torque vs hp. Most of you already know about most of this but still good nevertheless.

 

The dips in the torque curve are due to the scaling of the graph. If you look at the scale, it is zoomed in to show good resolution, but it also makes people think it is bumpy when they don't know what they are looking at. If you scale both sides from zero, then it will look a lot more "normal" to you guys. Look at the size of the dips - we are talking 5 to 10 lb/ft on many of them - not a big deal, and not as bad as it looks. It also doesn't cross at 5252 because the scaling is different on each side.

OP: Please reopen the file, rescale both sides as min=0 and max=250 and post that photo - it will look much better (smoother) to people that aren't used to seeing good resolution on a dyno, and it will cross at 5252 like some people expect to see.

 

Had to go back and re-look given what you said, and I still see "concerns" for me. Biggest dip/peak is 30ft-lbs and that is not expected, by me anyway. Second delta is 15-20 ft-lbs, still more than expected. Downside for me is that these variations occur right in the prime daily driving rpm range.

 

It's not unusual at all in an engine with variable cam timing.

 

Looks like I need to do some more research. I have not seen it to this extent, but may be due to just looking at the "mild" versions of VVT, not the more integrated versions. Must learn more....

 

@Lurkin

New engine changes.. lots to read

http://www.toyotareference.com/guts/tacoma16_engine.pdf

 

probably why the transmission seems to shift allot between 5-6th gears. Toyota worked hard on mapping this whole system out.

 

Wow Thats it ...
That engine is even lamer then previously anticipated, no wonder got smoked by 2gen and 1gen trucks. Good God and there is no supercharger or turbo option for that shit either.

First video is turd gen acceleration

https://www.youtube.com/watch?v=a7d68rDnF-Y

 

That kick around 3.8k is actually very reminiscent of an S2k switching cams at 6k. Same little swift kick in the butt feeling. Very different results at the wheels though...

 

Yes, it's normal. That's the beauty of the Dynapack dyno. It's very sensitive. It will plot any minor fluctuation where the big roller dyno's tend to smooth out the curve because the mass of the spinning roller. Also has to do with how you scale the graph. Its zoomed in so it's easy to see. If you look at the K&N dyno plots someone posted up in this thread there is space on either side of the plot in the graph. This is very zoomed out and makes the plot less wavy and not as detailed. We can measure changes in hp/tq from spark plug gap changes on this thing. Amazing dyno! Yes great torque IMHO.

 

This "softening" of throttle input (seen here from @tacitos pdf link) may explain a small portion of "butt dyno" that says the engine doesn't feel strong, even if it puts down good numbers. Basically, what this says (if I am understanding it correctly), is that when you MASH the throttle HARD, if actually denies you some of the initial requested throttle input, and eases you into full power over a short period of time. This affects the derivative of acceleration (how fast you are changing your acceleration...also known as "jerk") and numbs it so the vehicle doesn't lurch as hard when you stab the throttle.

Not sure I am a fan of this. Will have to drive one soon.

I really wish there was a scale on the "time" axis.



Addition educational link before someone tells me I am full of shit:
https://en.wikipedia.org/wiki/Jerk_(physics)

 

Is it much trouble to post us a version of the graph at a more common scale? Like 0-250 for both? (someone above asked also) Just for perspective?

 

Yeah I will try to get that after work today. Will post up as soon as I got it.