Woot.....you bring up exactly the other side of the argument I was having with myself about which tune to compare vs the etune.

At least they have a good idea of what they can end up with

 

my car is being tuned on 10 psi tomorrow on aem ems series 2 by dan of e-tunez. will post dyno after i dyno next week

 

Looking forward to seeing how it turns out.

 

Thanks for sharing the dynos.

Did eTune try a lower VTEC engagement? Your dyno plots look like VTEC should be lower.

 

The vtec engagement was moved from 5600 - 6400 to 5750 - 6400. I know that most lower it rather than raise it....but the surge when going from the low cam to high cam is gone now. Just pulls progressively harder from the bottom of the rev range to the top.

How much change to the ignition / fuel tables does lowering the vtec engagement take?

 

If the lowest VTEC engagement that he tried was 5600, then I think this really says a lot BAD about e-Tunes. They should have sent you a calibration to datalog with VTEC set really low, like 3500 RPMs, so that they could determine your "optimum" engagement. There's a good chance that they might have left out a nice, big resonant hump between 4K and 5K RPMs.

 

That is really my fault....

I wanted to keep the vtec engagement point near stock, I have no idea if there are any durability issues with running a lot lower engagement point.

I know I'm giving up some in terms of maximum gains, but just wanted to play it safe.

 

Oh, that's a shame. The only risk of engaging VTEC early is that it uses oil pressure to function, so if you engage it too early, oil pressure can drop. However, it is widely accepted that anything above 3K RPMs is totally safe. Hondata says that anything over 2500 RPMs is safe, so there really isn't any risk to setting VTEC at it's optimum RPM, which is probably going to be close to about 4K RPMs, depending on your setup.

 

Honestly, 90% of the gains from tuning a nearly stock S2000 is from dropping VTEC to it's optimum point. If you're not going to do that, then you're really missing out on most of the benefit of the FlashPro.

 

I am confident in the wonk my tuner did for me!! For only having intake & exhaust, my car runs damn strong.

I also love that the transition into vtec is smooth. Don't have that big dip in power before crossing over, and no big hit when it comes on the high cam.

At the end of the day, I'm very happy with what I'm running. Honestly I don't need to go to extremes. I'm 41, and the car stock is quick enough for me. My car is much more fun to drive now than it was, it makes great power, and the tune is safe.

Oh.....and it's probably good to remember that I'm pulling anwhere from 25 - 30 mpg in mixed driving.

It's also good to know that I was tuned based on the info I provided to my tuner. I just wanted to enhance it a bit and see if it could safely be made better.

Read the info on the website....they have performance street maps & more track based maps. I wanted a good, performance street tune that had safety margins built in. That is exactly what I have....and with the STFT consistantly running at or near 0 most of the time.......it's a very solid tune. It's smoother, has more performance, and has as good or better milage than stock.......I'd call that a win.

Gernby, all the above is not a knock on you......not my intent. Only that tuners all have different perspectives and approaches to tuning a car. These guys took the time to ask what I wanted, and really worked to give me exactly that.

So anyone that is interested, contact them and tell them what your goals and objectives are. They will work with you to try and achieve exactly what your looking for.