X-Posting from G35 driver to get your opinion on all of this

Hey guys,

Well i finally went through with it after going through the bullydog, and then hypertech and i think my car is a lemon. I went to Jtran here in Houston. they specialize in the VQ motor, as well as nissan/infiniti in general, and hes got over 70 uprev tunes done under his belt. with my mods he was only able to get about 4HP and 10tq out of it.

Because he did change a few other things like the throttle restriction and torque management settings the car feels much more responsive and gets moving quicker, im just bummed i didnt make more power. he said he had done plenty of G37s that have made great power, as well as a 07 6MT that made really good power. he said the only difference between that car and mine was the 6speed and he had the Stillen Gen3 intake.

He told me that since i basically made no power he was just going to charge me for the license, and for me to take the money i was going to spend on the tune and buy a STillen Gen3 intake and then come back and we could retune.

What do yall think? vid below Just for fun. Its a good soundclip for anyone wondering what Resonated HFC and A FI catback sound like as well.

to add to my other post, the numbers are before and after tune, all the mods had been installed previously




2007 infiniti G35s sedan Dyno runs - YouTube

 

Hmmmm....those numbers are very low. Johnny tuned mine over a year a go when it was completely stock as well and he managed to squeeze out 11 whp and 16 torque. You car looks almost identical to mine. Johnny does know his stuff when it comes to the VQ motors and I'm very surprise that that was all he could get. It could be your car though.

 

what were your numbers? i ended up at 267 hp and 210 tq

 

Man that's a bummer. Keep us updated on the results after the Gen 3 intake. I was looking into a tune down the line, but if that's all the HP I can get, forget about it.

 

I think im a fluke. Johnny has never seen this issue before. i just need to find a used Gen 3. $550 is pretty steep.

 

are we talking peak or throughout the powerband? i only gained 4 whp at the apex, but 12 whp throughout my powerband.

 

well in your case Peak would be 12whp. im talking about highest hp gain overall.

I just ordered a Stillen Gen 3. ill post up after the install.

 

I just got my uprev tune done 4 days ago and i was at 311 hp and 287torque

 

Dynos can post corrected or uncorrected, and each run can vary the amount posted...if you want power. Go FI.

Also going to heavier wheels is going to drop power, since dynos are measured at the wheels...probably a decent amount too.

 

Dyno sheet?

 

211tq seems extremely low regardless of dyno...

 

I had Uprev done and ended with 276 and 222, mine's an X.

 

Yes I have dyne sheet if you would like to see it pepper

 

What was the effect on fuel economy?

 

Post it up, I'd like to see how it looks and what kind of dyno.