Ah icic!
Thanks for clarifying guys!
Car sounds sick btw!

Wow great results Sam. Now it's just a matter of time before we start to see more of these results over here.

What octane fuel are you using over there?

Equivalent of the 93 Octane that you guys use I believe

Ah ok, nice. I didn't know if you guys got something higher over there or not. Thanks:tiphat:

How much do these tunes cost? And do you have to buy a kit first then buy the time on the dyno too?

Usually around 600 or more, you buy the cable (software is free) and then the dyno time is usually built into the purchase.

So the $600+ is for the cable and the software is free? And dyno time should be free. Im used to tunes that you just pay $500 and they copy a new file according to your mods to your ECU. Granted they are only 95% of the performance but well worth the price.

If its jsut $600 then I would probably pay that much for 30 more HP/TQ.

I didn't have to buy anything, I just walked in, paid 788, and walked out with 30 more horses haha

Thats how I would want to do it. But maybe less than $788, more like $600 max.

G37 what was the lowest gain and the avg gain? Im looking more for a consistant number thru all the rpms than a high number.

Well it varies from shop to shop, you should check up uprev.com and find your local tuner and get a quote from them. From what I was told is you can just get a tune & dyno time or you can also buy the cable so you can access it when you want without going to a shop.

Man the closest place is like a days drive for me.

the before and after dyno were done on the same day?

Within an hour and a half actually

Since this isnt a a static tune that is the same for all Zs, its really up to the shop tech to get everything right for numbers like this right? So one shop might get it and another might not unless they share notes.

Not all engines are the same, if I upload my map and send it to you, even if you may have the same mods you might not see the same exact gains. My tuner did around 7-8 remaps before walking over to me saying "Sam, I don't think we can squeeze any more out of her"

Now do the other shops know what he knows and can do the same or better, thats my concern since its not coming from a master database or something like that. I would be fine paying $500 for a tune according to mods even tho it might only be 95% perfect, thats still better than nothing. My other FIs werelike that and they worked great. A couple people spent more money to try and get it to 100% and they only got an extra couple of hp out of the 1K cost. Most CAIs and aftermarket exhaust make about the same gains so it could be feasable but Im not 100% sure due to the vvel.

What does the VVEL have to do with anything?

People are pushing 10 pounds of boost without even touching the VVEL..

I didnt know if it did or didnt. If we were close I would have the shop copy your map and put it in mine and see how things work, assuming we had the same mods and of course same car. Im pretty sure it would be very close in numbers. Thats why alot of turbo tuners just create several maps according to mods and you just pick and upgrade as you go for free, after buying the initial tune. It was actually more profitable for the shopas they didnt have to do dyno time and still got $500 for a file they downloaded from the main companies database. It took about 2 hours to drive to the shop and 15 mins for the file change and all was good.

I hope uprev is keeping a copy of these maps on file for future references, then they might jsut be able to sell the file without a dyno tune.

That is a solid gain from a tune, your motor will be much happier now, why would your tuner not share the data? I am guessing probably 2 degs added from looking at your TRQ, the AFR would have netted you power.
Love the comment on the rear end breaking at will, now that is fun

It's not necessarily about the numbers themselves, but about the gains seen from stock to tuned. That's the important stuff!

You cannot duplicate the exact same variables from one moment to the next, even on the same dyno.

s
UpRev is in Austin that's where my Z went to get tuned but I did not see 30 more HP but is was a big improvement Jared and Rich and the guys know there stuff.Had my 07 Titan I did see 30 more HP on the Texas Titan

M35 is next on the list:driving:

I was wondering the same myself. The Z comes from the factory tuned for the lowest emissions, agreed? That equates to a very lean running engine which was shown in the base run AFR's ranging from low to mid 14's. Tuners will lower the AFR which will result in a cooler running engine i.e. runs richer and at the same time advance the timing to produce the gains. I expect your particular tuner advanced the timing well in excess of 2 deg and probably throughout the load range to the brink in which the engine will begin to 'ping' at any given load/rpm. That is the point where your power is peaking. I'm not surprised that you gained 30HP which is about a 10% increase from a leaned out engine to begin with imo. I have a Screaming Eagle Race Tuner program for my Harley which lets you play with dozens of variables but basically all you need to to do to get about 90% of the performance from the engine without using a dyno is adjust timing and AFR. There is more than one way to fool the ecu into increasing the fuel into the engine depending upon the variables that allow adjustment. On Harley's, one way is to adjust the volumetric efficiency tables. Increase for an increase in fuel delivery which lowers the AFR. To get the most out of a Harley, the narrow band O2 sensors need to be changed out to wide band. Anyway, the twin cam Harley in essence is a 2 cylinder Chevy small block. Anyway, for the Harley crowd, maps are readily available for downloading free for just about any mods. These maps will get you to about 90% or better performance. I personnaly don't track my car so I wouldn't take it to a tuner and spend say $500 just to gain say 3-5 more HP (90% to 100%) using someone else's dyno tuned map in my ecu. I would be happy with a canned map and tweak by seat of the pants from there. I'm sure Nissan has built in some parameters that can't be exceeded even by a tuner such as timing advance in order to protect the engine. For those who want to tune the engine themselves go for it but you must have a good working knowledge of the inter-relationships for the different variables in the map. If you don't then don't bother with self tuning or you will probably due more harm than good to your engine.

Thanks for taking the time to write up your post but I don't see how it answered my question lool

I am worried about getting my car tuned when I got the LTH and CBE.

I am worried that they are too retarded to know whats going on

Just looked at this thread for the first time and I must say I'm pretty impressed

Yeah I would look for a reputable tuner

bolt on mods are easy to do canned maps for as they all basically work the same, I wouldnt worry much about basic mods and tuning.

It wasn't an answer to your question. I too would like to know why this VVEL thing needs to be 'cracked'. If I understand this VVEL stuff, it gives fuel economy while cruising and power when you step on it. Seems simple - intake valves open sooner i.e. longer duration with a higher lift and the timing is advanced accordingly for power when you get on the throttle . In cruise, for fuel economy, the timing is retarded, valve lift is reduced and begins later. Someone correct me if I'm wrong. Your tuner, as you stated, adjusted timing and fuel delivery to produce good gains in HP. Did he mention anything about cracking the VVEL 'secret'?

30+ whp from just a reflash?? Has anyone duplicated these results or similar with uprev?

I'll let you know Thursday :tup:

chuckd05 put down some impressive numbers with his bolt ons + uprev, unfortunately he didn't get to dyno it before the tune.

If you look at his mods and his dyno and compare it to others, it seems likely he got 20-30hp from the tune alone. Dyno time with a competent tuner is key.

Nice! In for results and dynos!

AFAIK, ignition and timing hasn't been cracked - just AFR...

OP claims ignition timing was tuned...If I'm reading his post correctly. Are you claiming this is not possible?

thats incorrect, on the 370z uprev can change: rev limit, speed limit, afr, and ignition timing

You can input timing adjustments, but they don't go anywhere. The ECU just overrides the inputs with its own timing parameters. AFR is the only thing that takes. My understanding from Sharif (who has spoken about this directly with Uprev) is that our ECUs automatically add as much timing as is safely possible straight from the factory, so there's little to be gained via timing adjustments anyway. Not sure if I believe it 100%. But what do I know? I'm no expert when it comes to ECU tuning.

Edit: A clarification re. timing. What I've been told is that there's a max threshold to the timing. Try to dial in timing past that threshold and the ECU will just ignore your inputs. However, if your ECU is for whatever reason running timing well below that threshold and you use Uprev to advance it up to the threshold, those inputs will take. They will take because they're still within the factory max threshold. That's why we've seen such inconsistency with some folks (like me and RCZ) getting hardly any gain (I only got +6whp and RCZ got even less if I remember correctly), while others make a lot more. The results vary depending on each vehicle's starting point in terms of where the timing is.

Speed limit was not adjustable when I had my tune done. Don't know if maybe they've updated their software since then though.

ECU will only over-ride ignition parameters input if it detects unsafe conditions aka knock, my car was tuned with 93 octane fuel.

GTM has been tuning boosted G37s for a while now, you're telling me they're all running on stock ignition timing?

So if we were to do water/meth mod the ECU would do the timing for us and we wouldnt have to mess with it? And if the mix ran out the timing would go back to normal? If so that might be a good mod without having to adjust timing yourself.

See my clarification above. I'm just relaying what I've been told, man. I was also tuned on 93. Honestly, I'm not entirely sure what I believe. One one hand I'm skeptical. But then I see a bunch of other guys getting the exact same results and information from their tuners (like RCZ). *shrug*