Christian came to us for tuning on his Z a few weeks back. He has a black powdercoated Stillen G3 Intake, Berk HFCs, and Tanabe Y-Pipe connected to the factory muffler.
Great clean look with the intake piping powdercoated black.
Final Results
Archives for : 370Z\G37 (Z34 & V36)
Last time we had Sean’s Z34 in the shop we added a few little goodies: Part 1
In this update we added a Stillen 19 row oil cooler to keep those oil temps at bay. Typical engine oil temps for a Z34 on the street for a warm day can easily reach 240-250 degrees. Don’t even attempt to take one to a track without a cooler. You will engage limp mode in a matter of a couple laps.
With the addition of a cooler one will see temps drop down an easy 20 to 40 degrees. Giving the owner a much better feeling that oil temps aren’t so far out of control.
Lastly we tuned Sean’s Z34 with our favorite UpRev software. You may have remembered that Sean’s car spun the roller’s with impressive numbers a few months ago, but now that the summer heat is upon us the numbers are a little lower.
We baslined @ 309 whp and after tuning we put down 316 whp. Nice solid gains throughout the entire powerband.
Mr. Kevin Chen drove up from S.D. to get his Z tuned. Kevin has the full F.I. exhaust system including resonated test pipes and Stillen G3 Intake.
Baselined @ 308 whp and came out ahead to 318 whp after tuning.
Last month Avo brought in his G37 AT Coupe for tuning. His G has the Stillen Gen 3 CAI, and Fast Intentions exhaust system.
There was some definite “leanness” commonly found with some intake systems.
The “before” and “after” graph. Red is before and blue is after.
Making a run down the 1320.
Rudy brought in his Z34 for some tweaking on our Dyno. Mods include SSR wheels, K&N Typhoon Intake System, HKS Hi-Power Catback, Kinetix HFCs, and Stillen Engine Oil Cooler.
His K&N intake didn’t pose any lean running condition associated with some intakes.
A nice average of 9 to 10 whp across the board after the tune.
Last week Brandon brought over his black beauty AT 370Z for tuning. This Z34 comes equipped with F. I. Long Tube Headers, F.I. C.F. Catback, Stillen UD Pulley, and Stillen Gen 3 Intakes. Brandon knew better than to go flooring it until the car was tuned. Make sure to at least check air fuel when doing engine breathing mods. Many of the intakes out in the market will lean your mixture.
Peak power didn’t go up drastically, but everything where it counts below that made an average of 10 more whp and torque from just tuning.
Our customer Sean wanted to add some more mods to his Z. He brought it to us with Stillen Gen 3 Intakes & Stillen Catback. Before installing the Stillen UD Pulley & Berk HFCs we got a baseline of where the Z stood. Shortly thereafter we went ahead and installed the new parts.
Stock Crank Pulley
Stillen UD Pulley
The Stillen pulley is lighter by almost 4 lbs. Factory pulley weighs in at 4.72 lbs and the Stillen piece at .99 lbs. Accessories get underdriven by 20%. The way these free HP is by removing weight, the lighter it is the easier it is for the crank to turn and by driving the accessories slower you also free power. Judging by the before and after its hard to tell how much difference the pulley made. Having not dynoed only one mod at a time we won’t know.
Stillen Catback
Berk HFCs (Lookout for the header to factory CAT bolts!)
However its probably a safe bet to say that the HFCs made more significant changes. AFR dramatically changed from before and after. No tuning was done on our end.
It was a nice gain of 7 whp to get it over 320. Most HP gains were had above 4700+ RPMs and torque benefiting all the way through the curve. Sean’s Z is a strong performer judging by other 370s we’ve had on the dyno. Tuning his AFR should get him some more mid-range power.
Joe came in from Vegas earlier this week to do some testing for the Fast Intentions crew and for us to tune his slick white 370. These cars are growing on me more and more.
Interior build is sooo much nicer than the old Z33 especially an early (03-04) Z33 for that matter. The extra power it puts down definitely doesn’t hurt either. We did a couple baselines to get an idea of where the car stood before F.I. installed a set of their new headers for the HR\VHR platform. Joe’s already installed mods included Stillen Gen 3 C.A.I., F.I. HFCs, and catback. This baby sounded wicked on the dyno.
Some stats on the headers:
- They are long tube that will bolt directly to the catback.
- Eliminates the OE CAT pipe.
- Weighs in at 17 lbs lighter than the OE header & CAT pipe.
- Made from 304 SS and includes a lifetime warranty.
- No CEL(s) to worry about.
The set pictured above is a prototype using a different sized collector.
This is the 2nd set of headers installed and the first production unit installed on a Z.
These are the results from stock headers to F.I. headers & tune. The AFR on this VHR was whacked out. Rich down low and lean up top. The Stillen intakes aren’t helping that. Looking forward to doing some before and after results on those intakes to see how much power is made and how drastically the AFR is changed. I’d also like to see stock air boxes on Joe’s car with some K&N drop ins. Joe’s VHR was in dire need of tuning especially after feeling, hearing, and conversing with his engine. It had a terrible drop in power resulting in a nasty hesitation that could be felt right around 4k RPMs. This was taken care of luckily with a custom flash. AFR after just the header install stayed the same as before with stock headers in case any one was wondering. Peak power didn’t change much. However a majority of the power-band saw a nice increase of around 10-15 whp and 10-18 torque.
Our customer Kevin brought in his nicely done G37 Coupe. Sporting a Stillen front lip and painted grill, this G gets it done.
To add some bite to the beauty he’s done some simple bolt-ons to complete the package:
- R2C Performance Intake
- Berk HFCs
- Fast Intentions C.F. Catback
Kevin’s G is also an auto which robs a little more power. Runs were done in 3rd gear, once we can get the UpRev MPH limiter fixed on their end we can make some pulls in 4th.
This 37’s A\F mixture was pretty good and not crazy lean like other VQs I’ve seen with other intake kits. Many systems rely on increasing the sampling tube size of the MAF element for power gains. This throws off the calibration of the air being sampled. This in turn will make the mixture leaner and combined with other mods can lead to unsafe A\Fs. The factory air boxes are actually pretty good in most instances. We made a few baseline runs and determined our plan of action to extract more power safely.
We gained an impressive 30 lb\ft of torque and 17 whp @ 3000 RPMs with gains throughout the rest of the power band. We may have to talk Kevin into some headers next 😉
Video:
