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Discussion Starter #101
here's a little teaser of how the new setup is sounding... full video with accel, etc (and hopefully less "noise" from wind or whatever that is)

Reminder, this is with factory headers, factory primary cats, secondary cats are now Resonated Test Pipes, factory Ypipe, factory Midpipe + resonators, HKS Hi-Power replica dual resonated mufflers...

The video doesn't really catch how much more "V8 throatiness/choppyness" was added without adding any bass/drone..but it sounds.. more german?
I'm not sure how to explain it. Hear for yourself:



(yes it sounds similar to my muffler delete but trust me it is quieter, less bass, and minimal drone added from the RTP)
 

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The factory claimed HP is at the CRANK -- so 390hp/370tq
To get that power through our FX and the AWD system, by the time it gets to the wheels it loses a few ponies on the way. (That's pretty much how it works on any car)

Compared to a lot of AWD vehicles the Nissan ATTESA ETS has little drivetrain power loss. some lose much more.

Got you - thanks.
 

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Discussion Starter #103
Took my FX50 to the 1/4 mile drag strip for the first time:


Mods: Custom Resonated Test Pipes, HKS knockoff Mufflers. (ypipe, midpipe are stock) + Partial UpRev tune (no ignition timing adjustment and the test pipes were not tuned in i.e. I added them after the tune)




Best R/T: .533
Best 60': 2.096
Best 1/8: 8.860 @ 81.16
Best 1/4: 13.697 @ 102.02
Altitude @ 45 degrees

other runs were 13.8, 13.77, 13.9, 13.8, 13.8

Top run slips attached (I'm 114) Mainly races against my buddy in his '10 WRX hatch and got him every time except for the 1 time he beat me because he caught me sleeping at the line (and he dumped the clutch and launched for once).



Another FX50 owner (Da mayor on forums) got 13.523 @100.37 mph in his with FX50 with 22" wheels and a muffler delete, and that was the number I was trying to beat. Looking at his slips it looked like he was able to get out of the box faster, (.4 r/t, 1.9 60') which let him have a little bit quicker 1/8 ([email protected] 81) and thus a quicker 1/4, even if at a lower speed. (13.523 @100.37)

I guess I need to play around with how I launch it. The fastest runs were simply smashing the gas in DS mode. I tried brake boosting, manual shift, etc. DS mode from idle was the fastest. I also left from the two-light stage position instead of "deep' which would have allowed me to roll a bit. Next time I will try this method because it's the method some use to get out of there more quickly. I also chirped at the line each time a little but so it could have been my tires, the temp, the track (45*) etc.

if I can nail my launch, I don't see why I wouldn't be able to beat his 13.5 figure. It was my first time at the track. Another issue may be the tuning, which gave me more power up top but sacrificed a little bit of low end by moving the power band a bit. (higher speed, slower time)

May have to finish my tune and practice my launch, then see what happens.
 

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Ever consider taking her to a road course? Also, with the FX50's weight, even 10-15hp increase may not show up much in the 1/4 mile. I've seen stock FX50 numbers around [email protected] A shame that simple boltons cannot make a substantial difference in performance for this big engine of ours.

Also, did you try weighing her on the track scales?
 

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Discussion Starter #105
Ever consider taking her to a road course? Also, with the FX50's weight, even 10-15hp increase may not show up much in the 1/4 mile. I've seen stock FX50 numbers around [email protected] A shame that simple boltons cannot make a substantial difference in performance for this big engine of ours.

Also, did you try weighing her on the track scales?
Not sure where you've seen stock FX50 running 13.6, but it's not like I've added much power anyway with mufflers, test pipes, and half a tune. I don't have a stock base line to compare. Infiniti tunes its motors form the factory so it's no surprise they are tough to get a lot out of with only bolt ons unless you get super serious.

anyway, Finally got around to filming an Exhaust video.

again, mods are - HKS Hi-power replica resonated mufflers (from G/Z); Custom GTM Resonated Test Pipes (from G37/370z). Everything was custom fit to my FX50.
Other modifications include: K&N drop in filters, UpRev Osiris tune.

Enjoy

http://youtu.be/qN07NMHdtMk
 

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Discussion Starter #106
Got my car back after a month at the dealer. 2 TSBs done, a polish, detail, brakes, new fluids, and straight to the dyno for tuning.


Went to my old buddies at Vinny Ten Racing out in Long Island, NY. (Some of you may remember my experience with them in the past with my FX35)
also, they are known for some nasty VQ35 builds (first to 800hp with the Jim Wolf Twin Turbo kit) and Vinny Ten got his name to fame in the 90's getting his Supra MK4 the first into the 10's on the 1/4....so my FX is in good hands.



I'll get to the numbers: (keep in mind these are DYNOJET AWD DYNO numbers)

Base run with old tune not setup for test pipes: 367 awhp / 348 ft/lb
Not a smooth curve, power was all at 7k aka not practically usable


Maximum numbers achieved after tuning for top end power and pre-smoothing: 368 AWHP / 358 ft/lb Tq

FINAL Average numbers after smoothing and adjusting power curve: 361 AWHP / 352 ft/lb TQ


The tune moved more usable power to around 5k vs. the 7k it was at before, and made the entire curve much smoother
(red is new curve, blue is old - ignore the red dropping out at end, this is from the transmission overheating after 15+ runs, explained more in my Uprev Tune thread)

VIDEO:
https://youtu.be/VLSL8-S9b6s


after a long evening, the FX50 emerged with not just a few more ponies, but more usable power than before.
Butt dyno felt it on the hour drive home on both the highway and from stoplight.

These numbers are from a DYNOJET AWD DYNO, which reads differently than the MUSTANG DYNO my last tune was done on.

my MUSTANG DYNO numbers after a tune with just the Mufflers and Filters was 329 AWHP / 338 ft/lb TQ
That same tune on the DYNOJET (albeit with test pipes added) was 367 AWHP / 348 ft/lb TQ

So yes, the DYNOJET read ~30 more HP but only 10 more lb/ft - this is both because they read power differently and the way they are set up.
The guys at VTR swear their number is more accurate, and that because they let the transmission be cool before doing pulls, this is what produced the higher number.

So, whether you want to saw one number is reading high or the other low, keep in mind they are not that far off, and even if you take the average between them, it comes out to a healthy average of 348 AWHP / 343 lb/ft TQ- Which isn't that ridiculous a number for the 50.

Now I am unsure of how exactly to calculate crank HP and what not, but I used some online calculators and it seems that the numbers are follows:

Original Mustang Dyno run at 329 HP / 338 TQ = 404 crank hp (+14 HP / 18.5% drivetrain loss)
+ ~5 for Test pipes = 410 crank hp (+ 20 HP / 18.5 % drivetrain loss)
VTR Dynojet Dyno run max: 367 HP / 358 TQ = 450 crank hp (+ 60 HP / 18.4% drivetrain loss)
VTR Dynojet Dyno run avg: 360 HP / 352 TQ = 440 crank hp (+ 50 HP / 18% drivetrain loss)

I think that the MUSTANG Dyno numbers are a bit more realistic,
so I think it is safe to say that I added around 20 horsepower after mufflers, test pipes, intake filters, and a tune



#NOFILTER



So, the FX50 is all dolled up, freshly tuned, and is ready for my ROAD TRIP IN TWO WEEKS!
 
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