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!

This is with the oem plenum!!!! Yes I said OEM Plenum! The gtr intake is out for production and once that is finished expect to see some more updates.

Keeping things under wraps for sema!

Mike, must feel good when hard work and patience start to pay off, you took a lot of heat from a lot of people. I for one am happy you get to come out on top when it is said and done and show everyone what the z34 platform is capable of.

Congrats, those r some sick numbers. Makes me wanna jump on the stage 2 tt kit asap! How much more would u expect with the gtr manifold?

Love the sound of that beast.

Wow pretty impressive car :)

This car could literally beat you in cruise control.

Any chance of some on road footage in the future?

Probably after SEMA

Gotcha... were you guys planning on fabricating and tuning the balancer tube as well? [sigh] I still have mine, and it's currently for sale (got other priorities).

Can you elaborate further?

'thar she blows'

wow... Been waiting a long time for this!! AMAZING work!

Way to go guys.. can't wait for more details! :excited:

Thank you everyone for your support and kind comments, We greatly appreciate it. The car is running only at 70 % capacity at point, just ran out of time and had to let the car go for Sema. We still have more work to do and alot more data to share after we get back . so stay tuned .

Sam

Knew this would come along one day. Shame on those who doubted.

Any ETA on 7AT press Release?

mike's fconv pro get scrapped or is that gonna be an after sema thing too?

The fvon has not been scrapped. We have alot of data acquisition already in the car to monitor every minut detail about the motor. We have set this car up to be daily drivable on a stock ecu so that I can pass state emissions. Sam has blown me out of the water with what he was able to do with the stock ecu!!!

It really means 1k for every 1/4 of horse power made. Thats how much was spent. Ha!

Lol this dyno run was done at 24psi lol we are already past 28psi and 1000rwhp hahaha!

whateva! video or it didn't happen cry cry b1tch b1tch haha

Edit: what's the max psi you plan on running? for what compression was the engine built?

Hopefully the GT-R intake adds a little bit also. I really like it but I don't want it just for looks. Hoping it gives a bit for NA and FI applications.

Right now our biggest limitation is the exhaust! lol of all things the exhaust is too small @ Dual 3" back! LMAO!

We have several options on the table including cut outs for higher boost runs or larger exhaust... I am leaning towards electronic cutouts.

I believe the turbos are good for 40+ psi... Honestly I plan at running on spring pressure which puts us at or around 1036hp for daily uses. For Dyno runs that is yet to be determined...

Also from my understanding the new intake should help out a good bit and open up more power *fingers crossed*

what about engine compression on this build?

That would be a question for Sam.