Lower pricing, and 370Z support to Pro Tuners

Denny McLain

Watched the video of how the Variable Valve Timing works several times and still can't figure it out. However, can you control lift via programming? Shortening cam duration will increase lower end power while increasing it will pick up on top. If the factory has duration work out, how about lift? More lift will add to the top end increase. Does the system work that way?

kannibul

Think of it as a cam on a cam system, with one of those being electronically controlled.

HP Logic

I have some ROMS on tap Rich....I'll give you a call....exciting news!!

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Uprev

Not yet, it's far simpler than it seems in that video, but there are going to be issues. First off this is a totally new thing for piston motors. The functionality of it is far more complicated than just lift, it changes the entire dynamics of the motor itself. It's not a simple as VTEC or cam adjustments. Also the way it is used by the ecu vs throttle. Nissan has millions of dollars spent on this technology and there isn't anything currently available to reference it against.

I'm sure some company will jump out there and add software controls for it, and customers will suffer with poorly running cars because of it. Or the customer will have to come out of pocket when parts of the VVEL system start failing. Thats just not how we want to do business.

So once we have a bit better understanding of what controls we can find, along with physical limits of the system (endurance testing) we'll start to create software to control it. You probably won't see anything like that for a while though. The engineers at Nissan really have gotten so much out of it so far, we're not sure of what gains may even be capable if any.

1slow370

BMW, Toyota, and soon honda will all have continuously variable valve lift systems out in the next year. BMW had it first a year before NISSAN but the BMW system is limited by it's crappy and huge design to 6,500 RPM. The NISSAN version is good to over 8,000 and while it is still brand new the new toyota version looks to be equal to the nissan system. the new honda version I don't know to much about yet but it looks promising as well. All of these systems achieve the same basic end result with differences in max rpm, max lift, min lift, and complexity. Our system works great with good lift a large range and high rpm's but at the sacrifice of lubrication and friction. The toyota system uses a traditional camshaft but uses a special rocker shaft that his a lifter arm and pusher arm arranged like < that can change the angle between the 2 to transfer more or less of the cams motion to the valve. This only changes lift and not duration but it should be possible to replace the main cam for more power which you can't do with our VVEL. Food for thought it's out there and it's big shouldn't be more than a year or two before the american companies copy toyota again so there will be more demand for tuning these systems.

Zat_Zuma

.... looking forward to it's public release

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FricFrac

At long last. Looking forward to seeing the results of a tuned 370Z with the UpRev stuff.

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semtex

Can someone please enlighten me on what it means to have your ROM dumped and patched? I get that the tuners need to download our ROMs. But what's with the patching? Do they need to be 'fixed' in some way before they can even do the tuning?

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Denny McLain

Basically I'm marginal on some of the computer lingo trying to understand exactly what it does and how it does it too. Also... If you have an AccessPort and downloaded a tune into the ECU, how does this effect things? Lastly, no comment on the cam timing. Does it or does it not let you play with the cam timing and exactly (in lay terms) how does it work?

Sharif@Forged

There are several different ECU's/ROM files for the 370Z. So basically, we need to get some more 370Z's in our shop, and dump the ECU to our laptops. We then send this file to UpRev so their engineers can build a patch to allow reflashing to occur. Once a ROM type is in the library, than any Pro Tuner can tune that specific ECU. The 350Z for instance, has well over 20 different ECU types/ROM Files that all had to be patched back in the day.

Semtex....come on down!!! Call me!

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MacDaddy

I can bring mine down, if you're interested..throw me a PM

Uprev

I don't use PMs, too many forums to keep up with. rich@uprev.com e-mail me and we can set up an appointment.

semtex

Thanks for explaining, Sharif. I'll give you a call later today!

__________________
"There are no small accidents on this circuit." -- Ayrton Senna
316.8whp & 248 ft/lbs (Dyno Dynamics) | 319whp & 256 ft/lbs (DynoJet) (04/23/10)
Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf.

Denny McLain

OK...... So that means it is still under development. In addition, no one has addressed the cam timing aspect and by skirting the issue; the very simple obvious assumption is it also is still under development.

Someone, tell me I'm wrong.

Lastly..... why can't I do a read and send it in to Uprev if that is what they are looking for? More in their database.

Uprev

Yes we take the stock ROM file, and we add our controls to it. It's a bit more in depth than that but thats the general idea. We like to replace the ROM file with the actual ROM your car came with or the update for that ROM. Other companies use a single ROM to overwrite many ROM files. Nissan uses different ROM files for a reason and when you do it the cheap/easy way it can cause all sorts of odd problems.

Our way takes a while longer but the end results speak for themselves. Less customer issues, and the issues that do arise we resolve.