I have an 08 with k&n's, Hfc's and deleted mufflers. I'm going to do an uprev tune and was wondering what could I expect results wise. My fastest time in the 1/4 is 13.5 @ 103mph Thanks for any input.

I just wanted to say thanks for the input that you all have shared. I thought it was a pretty legit question guess not. Happy holidays....

There are a lot more first generation users on this forum then second gen g35 owners.

Uprev will change the driving dynamics of your vehicle and balance out the AFR. You will be running safer and at increased horsepower. Can't be sure with out a dyno though.

Ever head down to Lousiville? Dynosty has a dyno tune and a Osiris license sale going on right now for your car for 625$. Not a bad price and they can get you all the information you need. Give them a call.


Here is the address you can find them on google for more research.

13100 Middletown Ind Blvd, Louisville, KY 40223

Edit, your mods are minimal but increase AFR You are running lean and probably could gain ~ 20 or more horsepower depending on varying conditions.

Helpful? Say thanks if you think so.

You too!

Thank you sir, that's all I was looking for. Vqsmile, I've seen a lot of post from you over the past years. Thank you for chimming in to, even if you were being a smart a** with the hand wave lol... Happy holidays guys take time to enjoy your family an friends...

I contacted a forum member for you and you would only see about 10 HP more. Go figure.

10 isn't bad its the A/F an other perameters that will make it worth it. Thanks for looking in to it though I appreciate it.

I can't speak on the 07-08 but my 2004 gained 20 at the wheels with just exhaust, plenum spacer and stillen short ram intake with Osiris tune

Once I added HFC and a MREV2 I gained another 15 after a retune

First GEN G35's (VQ35DE) respond a lot better to tuning than the newer ones; the factory tune has gotten better with time so the butt dyno improvement isn't as drastic. Still gains to be had, as well as other cool features like map switching and lowering the fan engagement temp for guys in hotter climates, but you don't get that instant "Holy S@@t this is awesome!" improvement that we all like