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