I took my car on Thursday to Genesis Racing & Development http://www.grdtuning.com/ in Chicago. They do tuning for Z's, G's, WRX's and STI's among others. The tuners name is Tuan and was a very good guy to work with. He has worked with Cobb AP's and Uprev to tune various cars in the Chicago area. I had brought a copy of the race software with my AP(firmware 1.4) and cables to see what he can do to get more out of the mods I already have. I have the Stillen CAI, Berk HFC's, and Borla Catback exhaust. The map that was loaded on the car was the stock style map that came with the AP(used for baseline). The stock style map is the map that many users on myg37 feel gives the best performance numbers.

I got to the shop at about 11PM and after about 4.5 hours, countless dyno runs/reflashes, and a little over an 1/8 tank of 93 octane we got a total gain of 10hp/8tq. See the graphs and video. What really held back the ability to open it up more is that cobb didn't include the ability to change any of the cam timing. Tuan feels that he could get around 5 more HP if he could tune the came timing.

As for me. I'm satisfied, but really wanted more. The good part at least to me is that there are consistent gains after 3000rpm. To me it's not worth doing anything more to the car until I go FI. Trying the UpRev when it becomes available is not worth the potential couple extra HP when the next logical step is a TT setup. I really think that if you have the cobb AP to begin with, then get the tune to get a little more out of your car. If you don't have the AP, then hold out for more solutions such as the UpRev to see if they allow for cam timing adjustments.

Dyno's were on a DynoPack



http://www.youtube.com/watch?v=bKrSgUtRjNM

Thanks
-Will

 

Looks good man

 

numbers are not bad man! yeah was expecting more too to be honest.

Noob Q: Ignition timing could not be adjusted from the Cobb tuner?

 

Does anyone know why both Cobb's AP and Technosquare's reflash lose a little bit of torque/hp below 3000 rpms? Just curious.

 

I believe it has to do with fuel economy, look at the AF graph, it's pretty lean below 3k rpm at like 14 but then drops down to 12s at 4k+

When your driving daily just cruising you're usually below 3k rpm

 

I just spent almost 3 hours on the dyno with the cobb ap ....just like the OP stated... cant do crap with ignition timing. no matter what i did or what setting i put down.. timing doesnt change for squat!!

throttle tables are a plus! and fuel isnt too hard to get right. but come on the car doesnt respond to any timing input whatsoever!!

 

I think the OP was talking about cam timing chamelieon

 

Thanks for sharing!

Need . . . more . . . torque . . .

 

I'm glad that you guys are putting in good input because at first I was hesitant to post my graphs as the other cobb thread is going south bound. I honestly can't speak to most of the technical tuning itself as I had a tuner do it for me. I just watched from the side with fingers crossed.

Thanks to all that posted so far for keeping this on topic and not turning it into a pissing match. Criticism is good and warranted, but pissing matches are the lame.

 

Ah don't worry about it man, threads with dyno graphs are my personal favorite I wouldn't let such a technical thread go off topic anyways Thanks for sharing

 

Numbers are kinda disappointment. Hopefully the Uprev will have some improvements.

 

So why is the G37 engine so unresponsive to tuning while the vq37 in the Z seems to respond well to EC/ECU tweaks? And what brand dyno was that on? And also, I thought that the Cobb maps were meant for use with a stock cai?

 

^^^ What is a stock CAI?

 

well there is no cam angle advance feature, and the ignition timing tables dont work. just putting that out there.

 

I am a little surprised about the ignition tables; there has to be something going on there.... The cam angle/phasing/timing is a whole different ball game. The biggest issue is the VVEL is controlled by a separate computer (not part of the ECU). The code and everything is all new, so it is an all new endeavor to figure it out.

My understanding is that the heads on this engine are next to impossible to modify (only the exhaust cams could easily be replaced). A lot of the challenges are mechanical in nature, but tuning the VVEL part of the system is still a long ways off. This will yield the most gains. The VVEL system essentially controls a lot of the throttle (through intake valve movement) and cam phasing/timing. Neither will be easy to control, but this is where the biggest improvements/gains will come from. Cam phasing now is setup to be as "green" as possible, and throttle response seems to have more to do with the intake valves than the actual throttle bodies.

Sorry to say, but if it involves the heads on the VQ37VHR engine, it is going to take some time to figure out.... I would like to hear what some of the tuners out there think about this.