This is looking so good ...

I think tomorrow I will go dyno my car. I have yet to do that since Sam sent me my new tune a while back. I am interested to see what it does.
Frank

Awesome results! Glad to hear the fluttering has been resolved. I'm real close to putting money down on this kit...

^^dooo it..you wont be disappointed.

I wanted TT from GTM, but now... looks very attractive

you are correct.

Yeah I'm about to be getting back home from a work assignment in Europe. There's a chance I'll have to go back for a few more months so I need to see how that pans out first.

It could be arranged we just need to know ahead of time. This guy here got lucky and we were able to accomdate him when he stopped by .

:excited::excited::excited:

Damn Sam, i think you just made my mind up for me! Great work and congratz to the op. Ill be in contact next month or so sam :tup:

The credit really goes to the whole team at GTM. We all work very hard to deliver the best possible product. All the way from our parts department to our research, development, and design department, to our tech support department to tuning department.

This is a concerted effort between many people with various skills to make this whole thing possible. We would also like to thank our loyal customers who have helped us with their feedback to further refine our products to deliver the absolute best that money can buy.

So congratulations to everyone for making the GTM Supercharger Kit #1!!!

:happydance:

The hard work pays off eh? The proof is always in the pudding!

David,

Thank you for posting this information up and being part of the solution. ;)

I'd just like to make some comments on your graphs. Your power and torque look outstanding, but the afr looks odd. The target afr is to be 11.8 on average from the point the car goes into open loop. I did notice on your graphs the afr on each run got progressively worse toward the top end. Usually that is an indication that the exhaust sniffer coming off the tailpipe was being pushed backwards. It is very difficult to secure the sniffer in the factory tip. Ideally, it is best to collect afr data right before the cat. Collecting after the cat is ok, so long as you realize that it will read leaner than it actually is. Based on the logs I have from you from the factory widebands right before the cats, the afr was on target (11.8) all the way to redline, which is exactly where we want it to be.

It has been our experience as well that the bends right before the tip on the factory muffler significantly throw off the readings at higher power levels.

At stock power levels, the exhaust gas velocity is low enough to make the turn and still flow somewhat evenly (at least unnoticed by the sniffer). However, as exhaust gas velocity increases at higher horsepower levels, the exhaust gas has more momentum and therefore, doesn't flow through the bend evenly. Therefore, at higher power levels, the sniffer is reading a small quantity of fresh air that fills the low pressure zone created on the inside of the bend between each pulse of exhaust gas.

We've tuned hundreds of Z's and witnessed this phenomenon, time and again.

Here are some visual aids to help you guys understand what we're saying here:

hey sam on a car with after market exhaust and test pipes is it ok to go from the tail exhaust then or will that also cause to have a lean apearance. Also I would imagine that the 11.8 is the same for both TT and S/C cars. So at what point does the AFR start to become not so optimal to you guys? Finnal question when running data logs I know you mentioned before that they tend to read a little higher then what it really is, so does the little higher varry between each car or is there a set formula you guys use once you get the afr off the ECU. Sorry for all the questions but found this to be a great opertunity to educate my self. Thanks
Frank

Awesome clarification Sam. I would like to thank the whole team at GTM for a wonderful job and the wonderful product I have. I have to recommend to anybody the customer support is awesome. If I ever had a question, they were there to answer it. A good product is nothing without customer support and this company has both!

This news definitely made my day, VVEL has greatly limited tuning and I'm blown away by this news. My only question/concern is that will it be via uprev or will those already with uprev be forced to opt for a completely new possibly standalone setup. While I want vvel cracked standalone engine management is $$$$.