rkemp1

iTrader: (2)

I didnt know that. Thats a little disheartening but I am going to a dyno day Jan 12 at PF Supercars so I should be able to see more dynojet numbers for comparison. By the way I just realized that it doesnt have TQ numbers or RPMs. I will edit...

By the way their turbo IS is pretty sick. It laid down over 700whp when I was there with a smaller turbo than what it used to have.

robertsowka

what did they use to tune your car? dont you need some kind of piggy back or ems to tune?

Kuruma-san

no need to claim lots of people have gone 160+, on my last run another member and i both hit 160 (07 6spd base) even my buddys auto hit 160

itsjiggajames

iTrader: (5)

thats not close to actual. When my speedo said 155mph on my speedo my GPS said 145mph..

Kuruma-san

Yes, in 2007 engineers cant make a speedometer thats accurate, maybe you need to get your speedo calibrated, you think a lot of people would have tickets if the speedometer was ten miles per hour off?

ncparamedic

iTrader: (49)

Please tell me that isnt on a state road??

rkemp1

iTrader: (2)

I have never even looked at the digital when I was going for a top speed run because I was also under the impression that the digital may be a little off and I am not saying 10 mph, but off nonetheless. And unless the 07s have a higher top speed (which i kinda doubt) the speed limiter in the ECU stops you at 155-156. The only way that I know of changing that is a reflash. So that digital speedo may read 160 but I think your really stuck at 155 (not that 5mph matters at those speeds.)

Edit: I just read your post in more depth Kuruma-San. 160 i dont know enough to say thats pure BS but 160+ is definitely not happening with the stock ecu.

rkemp1

iTrader: (2)

Oh and I am not tuned. that was just a baseline dyno.

vnarang

iTrader: (7)

I like how you didn't read the post before you.

itsjiggajames

iTrader: (5)

LOL, You think i'm bsing? My 07 is new. **** is not off. It's a percentage error. At 40mph, its off by maybe 1-2mph. At 80, it'll be off 2-3mph. I don't know the exact percentage. On my e46 bmw, same ****. Every car I have owned has been overrated. BMW being the most overrated speedo. I have a GPS next to me from Garmin when i'm driving, and i have proof. What are your facts based off of? I never said it was 10mph off at all time. That would be a ridiculous dumb claim. If I even DID claim that, then when i'm in 1st gear at 10mph my speedo would read ZERO? No..... at 15X.XX mph, my highest clocked speed on my garmin GPS is 145mph. I hit 170mph, then my alarm woke me up. had to push the snooze button again. I wish I could hit 160. Car is limited. Your digital speedo reads 160, 165, ect ect ect whatever. You maxed out around 155, REAL speed. Don't believe me? Get your given RPM at 160mph. Take a picture of you going 160mph AGAIN, then take a picture of your RPMs, and do the math with the gear you're in to find out your actual speed.. that'll give you a CLOSER estimate. Then again, your tachometer isn't exactly on the dot either.. so there goes that too.. chances are our cars are overrated so lawsuits won't happen against Nissan.


edit. For your understanding.. http://www.caranddriver.com/features...r-scandal.html

ncparamedic

iTrader: (49)

Did you bother looking at the times both of them were posted..Obviously they were replying at the same time ... No need to make a remark like that after the thread is already two pages past the original reply and almost two weeks old.. Try to contribute something positive to the thread..

Gooey

iTrader: (18)

It may read high (what do you expect from a dynojet ) Well I will be at PFSupercars this weekend to dyno my car on a different dynojet to see. Thing about SRT, even if they have issues with the IS's showing way more power than everybody elses, their cars back up the HP numbers. I have seen their cars countless amount of times at local tracks trapping 140+mph

rkemp1

iTrader: (2)

So we sought out the rule book to find out just how much accuracy is mandated. In the U.S., manufacturers voluntarily follow the standard set by the Society of Automotive Engineers, J1226, which is pretty lax. To begin with, manufacturers are afforded the latitude to aim for within plus-or-minus two percent of absolute accuracy or to introduce bias to read high on a sliding scale of from minus-one to plus-three percent at low speeds to zero to plus-four percent above 55 mph. And those percentages are not of actual speed but rather a percentage of the total speed range indicated on the dial. So the four-percent allowable range on an 85-mph speedometer is 3.4 mph, and the acceptable range on a 150-mph speedometer is 6.0 mph.

Thats good info to know. It makes sense too, otherwise these twin turbo and supercharged guys would have no problem passing the 155 limiter without a reflash. And yes unless they are reflashed they too cant go past 155.

itsjiggajames

iTrader: (5)

Yup. And our Z cars are over rated for sure. More than normal, IMO.

baspence

iTrader: (1)

I'm getting the AAM 3 inch single and Y pipe next week. My dual popchargers should be on tomorrow. Hope soon as they get the reflash done with that and a fuel return line I can put down close to 300.

robertsowka

what exactly does fuel return do? i have seen that on the turbo setups and was just wondering what it is/what it does/if it adds performace or just reliability...

VitViper

iTrader: (1)

The factory governor is 159mph. The gauge on the dash would point at 160, the digital would read 159mph. The ECU doesn't care about your 'actual' speed when limiting the car.

baspence

iTrader: (1)

it adds both. after bolt-ons the z's run lean up top. the fuel return comes with a FPR and all so it helps rich'in it up on higher rpm's. Quinton at AAM said it adds about 6hp with intake and exhaust. also, it's because the z's have crappy fuel rail setups factory. they criss-cross from side to side instead of two seperate fuel rails.

capnstabn

iTrader: (1)

Is there a kit for this? What do I need to buy =x.

mrg1981

iTrader: (2)

To the OP-
Great numbers. Even if they aren't 100% accurate, they should be good #'s. With Cams, intake, Exhaust, spacer, and HFC on my 06 the Exact Dyno measured 259 WHP. Even if your car actually has 260 that is great considering the low cost of your mods and the few bolt-ons you have.