TRD/ Magnuson 4.0 Supercharger Tips, Tricks, and Mods

My URD intake really glitches the MAF readings at high throttle inputs. It's almost like it's too much air it is detecting all at once so it freaks out. Gave the blue lightning some juice tonight getting up to speed on the highway and check engine light came on again. I'd like to see the freeze data this time and see what my MAF gm/s was.

 

Ya the graph climbs very fast and then stops at the 322 and my rpms still go up a ways.

 

First video is real time.
https://youtu.be/W233WfBcfsk

Next is frame by frame. I’m clicking next.
https://youtu.be/iJ71CWP_gDM

And then the graph of the maf
https://youtu.be/XTMSQggcp10

 

Forecast says 50’s tomorrow am!

 

Anyone have any idea about my maf reading? Any of u data logging guys.

 

What about it? It's normal.

 

It’s normal to top out at 322 like that even tho rpms are still going up? I just feel like it’s weird. Last year I topped out at 322 also and this year running a urd intake instead of a airaid. And running urd ypipe instead of factory ypipe.

 

That is using the techstream to read it correct? I will go run my truck with the techstream and see what I get. Does it run good and keep pulling hard even after the 322 reading stays stagnant?

 

Seems weird it would stay stagnant. Did afr’s change?

 

That really depends on the way it feels as stated in the posts after. Does it keep pulling or does it sort of "top out" like there is no pull per se, but you just keep moving forward, almost like, is the truck running out of oomph at the end?

The superchargers powerband if I remember right is between 3000ish and 52-5500 if I remember correctly.

 

There’s only so much air you can pump in and pump out.

 

Still patiently waiting..............

 

Looking at the frame by frame it does seem like it rises to 322.45 g/s then stays there exactly with zero fluctuation until you back out of the throttle.
I would bet your actual maf is still climbing but I have no idea why the reading is topping out there.
It's not the maf sensor because us UCON owners can read higher numbers and it does so linearly in the log. Mine have been over 350 g/s logged with UCON.
What I dont know is the limit of the the TRD tune (I remember OVTune saying the maps were greatly expanded when TRD flashed vs stock ecu) which allowed him much more room to tune.
So I dont know if it is a tune limitation or a Techstream one.
The techstream is used on all modern Toyota Lexus vehicles though correct? If so it would have to read higher than 322.45.
Take a Tundra out for a quick log and see if it reads higher then you remove the Techstream from the equation.

 

Thinking about this a bit more I'm fairly certain it's the limit of the TRD tune. The programmers probably felt they had plenty of room with 380hp since that's way above what could be obtained with a stock pulley regardless of intake or exhaust mods.

Obviously others like yourself with TRD tune are above 322 g/s and running fine so???

Another interesting observation, since I have UCON with stock ecu, when I am looking at data with my Torque app my max maf that I have seen in Torque is 243 or 245 g/s even though the UCON logs much higher.
So the 243 or 245 is probably the top of the stock ecu map since that is more than enough headroom for a na engine with i/h/e mods.
This is all speculation since I have never seen or analyzed either the stock or TRD maps.

 

Ya it still keeps on pulling. Thanks for all the info guys. I can take my tundra out and see what that does. My afr is usually right at 11.2 or so at redline. I can’t datalog my afr gauge so that just by looking at it.

 

I'm running the same 2.6" and I'm at 11.2 also. I wish I had a few more rpm's. I think OV cures that, but I'm waiting for the smoke to clear over there. 60 degF here this a.m. on my way to work. Did a few WOT pulls in the toll lane. With headers and Vibrant cats I lost a little boost, but I'm moving more air. Still held at 9 psi.

 

You running the TRD tune?

 

Yes.

 

yes also lol

 

That's about right. I'm between 10 and 11 with a 2.5, properly adjusted bypass valve, ported lower intake, and 1 high flow cat post y-pipe.

Carefully with a raised rpm limit. @Torspd has seen in the past from the xr guys the engine doesnt like to rev much higher safely.