GTM Performance Engineering 1000HP MAF CALIBRATIONN -ANOTHER MILE STONE
 

We would like to share a mile stone we've achieved regarding the stock ECU. Over the last few months we've been working on developing a way to overcome one of the limitations of the stock ECU when it comes to making big power. While Uprev enables the aftermarket to rewrite the stock ECU in the 370Z/G37, there have been a few hurdles to jump when pushing the envelope over 600whp. Since day one, we always kept in mind that people will only want more power. In anticipation, we chose to use 3" MAF piping in all of our turbo kits and the GTM Stage 2 Supercharger Kit. Doing that gives us more headroom when it comes to MAF Voltage. It's a mechanical calibration that allows us to get the factory MAF to read more airflow. Even at 600whp, the MAF voltage is getting up to 4.9 to 4.95 Volts. While this is still below the 5 Volt limit, it does not give us any headroom to compensate for changing atmospheric conditions (such as a cold morning). The next step was to find an aftermarket MAF sensor that can replace the factory Nissan unit with the same physical dimensions and connector. Of course, that was the easy part. The challenging part is to produce a good calibration that contains a linear MAF curve so we can get the best resolution and still plenty of headroom for more horsepower while retaining factory drivability. This development translates into having a 1000hp car that starts up every time and can be driven normally on the street.

Ultimately, this has greatly expanded the capabilities of the factory ECU to the level of performance commonly relegated to a standalone EMS. While some standalone EMS options may have some additional features that set it apart, we've really narrowed the gap here.

To close the gap altogether, we are working on developing a system that will enable us to retard ignition timing in response to knock as well as boost cut. Once that is developed, there will be no reason for a standalone EMS in this platform.

Here is a dyno graph and a cipher screenshot showing only 4.5 volts maf reading @ 886 RWHP witch is equivalent to roughly about 1036 BHP .

Will be posting up a video of the car on dyno shortly .

Sam

Amazing.. great job guys !

Love it! The car sounds mean as hell as always!

Congrats! ... and thank you for your innovation.

Happy Hanukkah Marv

damn. That's impressive!

Very nice! Thanks for letting me have the title for highest hp Osiris for a week :(.

This thread is for all the White Dragon haters. Great job Sam and everyone at GTM, my hat is off to you! :tup:

Great work but I can't seem to get any sound out of the video.

Thanks guys! Sam and team have been doing extensive research with my car! Alot of new innovations will come from GTM and this project.

Cell, the sound works... See if your speakers are plugged in... Hehe also that there not muted either on ur desktop.

Great job Sam and team! I am surprised with that much power and that much negative rear camber that you aren't having major issues with slippage on the dyno roller.

It's working now. It was because firefox was acting weird.

Isn't that what the J&S Safeguard does? I was looking into getting one for my build but after talking to some shops the conclusion was that the 370Z adjusts timing pretty well in response to knock... I still want to get the unit for peace of mind though.

Thank you Sam and GTM for bringing new products to the community and its good to finally see the white dragon on a dyno. Congrats Bullit!

She's alive! 4.5 liters and twin turbo yummy-ness!

Wow! Sick!!! So happy to see it come alive! This is with the VR38 plenum as well? It sounds great, and that is a very nice plot!