Finally got around to tuning my 2007 350z (6MT GT). My original goal was to get to 300 WHP, but personal issues put that goal on hold for a while - until recently :-) .



Previous mods (back in 2008) got me to 297 WHP and 260 WTQ (SAE corrected on 70-degree day) with NO tune:

• Injen dual cold air intakes
• Bassani True dual exhaust
• Stillen HFC's

More recently, My stillen cats started to fail and started rattling so I had to have them replaced.





At this point, After swapping out the stillen HFCs for the Berk HFCs, and before tune, the new baseline went down to 293 WHP and 253 WTQ (SAE corrected) on a 85 degree day. Loss in power from 2008 could be from:

• Berk HFC makes less power than Stillen HFC?
• 15 degree warmer weather affected the numbers?
• Going from a 275/35/19 (2008) to a 305/30/19 this time
• Engine still only has ~42k miles

A few weeks ago, Z car Garage:

• Swapped Stillen HFCs for Berk HFCs
• Uprev Osiris Dyno tune

So now I'm sitting at 301 WHP and 259 WTQ.



Could the 15-degree warmer weather account for the loss of 4 HP and 7 lb-ft of TQ? Or the larger tires? I may go back on a cooler day to see what we get.

Either way, I love it!! The car is a menace! (OK, Maybe that's just the driver) You can actually feel when the computer changes the intake/exhaust cam timing at WOT. It's like someone flipped a switch for power delivery.

Even with 305 PS2's, the car still hunts for traction if the pavement is cool or uneven. If it's warm, smooth pavement, prepare to unleash the beast from within.

The tune effectively moved the torque band down by 1k RPMs. So what I had at 4k, I now have at 3k. This is a most welcome attribute. Also, no more pesky check engine light and there's the valet mode, which I forgot how to enable :-).

In other news, I recently picked up a Flex buffer with all the pads and did a 3-stage paint correction to get rid of the dealer-installd swirl marks from back in 2007.

I also finally got around to installing my authentic USDM Nismo sides and rear add-ons. Still need a front lip and Suspension work. No idea what I'm doing for suspension yet, since I don't really want to go too low due to the crappy Bay Area roads and parking lot ramps suitable for a 4x4.

With the power and wide, sticky tires, the suspension just can't keep up. Nose dive under braking, body roll in the corners and lift under acceleration are more like what you'd expect from a Toyota Avalon!

 

Let me get this straight, you only have Berk HFCs, dual intakes, CB exhaust and a tune? What dyno was used?

Either way, great numbers OP.

 

Congrats!

I wanted those numbers...

 

It's a Dynojet - with SAE correction (Reads lower than uncorrected). Thanks, I'm more than happy..

 

Those are great numbers! Rob and the z car garage guys are great when it comes to Z performance. I will be visiting them soon for an UpRev dyno tune as well

 

Post dyno sheet.

 

very nice, have you ran it at the 1/4 mile track yet? if so what was your e.t and trap speed?

 

No, but I plan to some time. I'd like to have Rob or some other good driver drive the car down the 1/4 so I can see what the car can do. Then I'll try a few runs to see what I can do.

Having never done any quarter mile driving myself, I think I'm a 14.5-14.8 second driver. I really suck at launching the Z, admittedly. It's not nearly as easy to launch as my old e36 m3.

I would like to do 4.08 gears at some point. I think that would really wake up the car. The HR engine makes for ridiculously tall gears. Although it is fun to come off of a clover-leaf in second gear and then punching it when it straightens out, but you have to be ready to shift a second later into third.

 

Yeah, I wouldn't trust my car to anyone else. Looking forward to your tune and dynos.

 

you and I would be a good race. I made 302/268 on ZCG dyno.

 

Great numbers! What mods do you have?

 

exhaust, test pipes, drop in filters and tune.

 

i had mine dynod on a mustang dyno (from what i hear they read low) i was 275 rwhp, with stillen gen 1 intakes, z1 tubes, kinetix hfc, invidia exhaust..... those are great numbers sir, how are you liking the throttle response now?

 

Great numbers, now quit fooling around and put some test pipes on there

 

I second that. Mine only pushed 285 on a mustang dyno too, which runs about 10% less compared to a local competitor shop's Dynojet. Anyways I dyno'd @ 100F+ temps ;( so hopefully it's much better when TX weather cools down.

 

They don't necessarily always read low, they tend to just be all over the place. My Z was dyno'd on a mustang and the numbers came back way too high.

 

where did you have yours done? i had steve kahn at prt tune mine, his name is very reputable. ha, in texas does it ever get below 100?

 

pretty nice. What's the car's mileage?

 

42k miles

 

I know!!! I'd love to test out/dyno some ART test pipes, but the fines in CA for cat deletes are pretty high. Also I'd hate to be that guy with the STINKY car. I've been behind folks with no cats and the smell's dreadful, even on the highway