Nissan 370Z Forum - GTM Performance Engineering 1000HP MAF CALIBRATIONN -ANOTHER MILE STONE

Nissan 370Z Forum (http://www.the370z.com/)

- Forced Induction (http://www.the370z.com/forced-induction/)

- - GTM Performance Engineering 1000HP MAF CALIBRATIONN -ANOTHER MILE STONE (http://www.the370z.com/forced-induction/43838-gtm-performance-engineering-1000hp-maf-calibrationn-another-mile-stone.html)

Quote:

Originally Posted by SAM@GTM (Post 1363127)

FYI, the 370Z system has a very sophisticated logic which depends on the two MAF sensors as well as the two MAP sensors. So yes the 370Z does have two MAP sensors in addition to the two MAF sensors. One is used mainly for atmospheric pressure compensation and the other is used as a switch between VVEL engine rpm control and throttle body engine rpm control. In the event that the MAP sensor for the brake booster goes below a certain threshold, it will switch to the throttle body control to make sure that there is sufficient manifold vacuum so that the brake booster can do its job.

Very interesting, especially how the throttle plates vs VVEL comes into play. I assume the MAP that watches brake-boost stuff is one the you see plugged into the top/rear area of the manifold itself. Where's the other one at?

Quote:

Originally Posted by wstar (Post 1363663)

Power Brake booster area.

Sam

7 AT upgrades :stirthepot:

Bullitt: What brand electronic exhaust cut-outs are you going to use?

Grats on the positive results......

i stand corrected. Once complete, your project will push the envelope and possible be a benchmark for tuning and performance

Bullitt we need photos of your car @ SEMA ...

Quote:

Originally Posted by SAM@GTM (Post 1354099)

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

Damn! :yum:

Quote:

Originally Posted by JB-370z (Post 1394543)

Bullitt we need photos of your car @ SEMA ...

Nissan 370Z - Asian imports at the 2011 SEMA Show (photos) - CNET Reviews

Nissan 370Z - Asian imports at the 2011 SEMA Show (photos) - CNET Reviews

he's going widebody, rear fenders are not done yet.

Sam, any news on the transmission upgrades..

This is a great read, guys. Good stuff!

Quote:

Originally Posted by Mike@GTM (Post 1363649)

That is true if the forced induction designer fails to compensate for the higher airflow of the turbo/supercharger by increasing the diameter of the MAF tubing. Of course you can only increase the diameter so much before you start running into other issues (fitment, resonance, turbulence, etc.).

I was under the impression that the upgraded MAF had improved resolution for those in the 300-600 power range over the stock MAF and that there were some advantages even if you weren't over the maximum flow of the stock MAF. Then again, most of my knowlege (what little I have) is on the 350.

Just for chuckles - maybe you need 4 intake tubes and equal flow tubing so that you can have 4 MAF's to get he flow per MAF back down into the higher resolution range of each MAF (not serious). I can see how the need for resolution could grow exponentially when you're talking about increasing the operating range almost four fold. Especially since you're talking about a device that is sensing temperature differences of air passing by a heated wire. At 28+ psi boost, you're facing a 3 fold increase in flow over normal atmosphere, right (14.7psi atmosphere + 28psi boost)?

Anyways, keep up the good work, guys. And keep dropping the technical info in threads like this. It's a great read for dummies like me that are trying to learn!

What's the update on the GT-R manifold?

there are only so many things you can do with the same number of cells in the graph. we would need bigger maps to maintain the same level of resolution as the stock setup, so it is amazing what they have done with tuning. one of the good reasons for having that fcon sitting in box for later with a car of this level