we have a mustang dyno and you can skew the results by changing the weight of the rollers, some mustang operators do it to try and get "equivalent" dynojet numbers, with more people knowing about Mustang dyno's it is not worth doing it because people have come to expect lower numbers so no sense in doing this. So based on this the question is not whether the Subie got the same numbers as his previous run but what are his results like? Are the normal for a Subie with his mods on a Mustang dyno or are they high?

also the numbers can get skewed if the rolling resistance numbers are off or have been erased, which some times happens and you have to check to make sure the file has not been erased.

Another thing is that if they do Subies then it is an AWD dyno and when doing a 350Z they have to switch between AWD and 2WD mode and some times that doesn't get switched over properly and the results will get skewed again, when we see numbers that are not normal, and yours would be in that category, we check all of these things to make sure nothing is wrong and then rerun the car. Specially since 3rd vs 4th should not yield such a big difference

 

What power did the subie make? Have u ran ur car at the track yet? Idk why the pull was done in anything besides 5th.

 

we normally do it in 4th, there is not much of a difference between 4th and 5th, also in 5th it takes so long to get through that heat soak might become an issue and get inaccurate results. And usually we are tuning so it doesn't matter if 4th or 5th, just want to compare before and after, and people can compare results with others that have run on our dyno, if they want forum bragging results they can go to a dynojet so they can compare apples to apples with others and not have the "well it was a mustang dyno" arguments

boosted cars we do in 5th to get better traction and the pull doesn't take as long as an NA car so heatsoak is not an issue

 

To the OP can you find out what numbers the STI put down. And I know moneys tight now a days, but maybe one of these days you can dyno on a different machine, I'm curious to see the results.

 

Also stock in 5th wouldn't you hit the speed limiter before you hit redline?(158)

Its funny my dyno was done on the same type of dyno and the sheet looks almost identical. Although Performance Motorsports dyno wasn't that outrageous its still a very "happy" dyno. I wish there was some "standard" that had to be followed. O well.

 

5th gear is 1:1 ratio which is idea for dyno's. (350z 6speed)

 

go to the track.. i bet you willl run no faster than 13.5 seconds and that will prove that your nismo is no different than any other nismo out there

 

Hey Nismo1534, i recently had my 08 dyno'd on a dynojet and it read 290whp. I was confused because I only have a AAM 3" true dual exhaust. I was expecting no more than 270 also. I was dyno'd right after my friends 370. But the thing is, his dyno results felt accurate with his bolt ons. not sure about mine lol

 

I know exactly what the only possbile explaination is...the engineers at Fujitsubo are fawking BRILLIANT

 

Thanks everyone for the info. The STI made 292whp and 323tq. It's exactly where it should be, given his mods/boost. I'll find out more info regarding the #'s when I call tomorrow.

 

Go for another pull. This time on a different dyno or at least have the tuner verify all compensation factors and adjustments are off -Just the raw numbers. Also pull in 5th gear.

Though I do believe rarely, due to certain factors, a vehicle rolls off the line that is just that much stronger than the norm (as do some come off weaker), in this case I would doubt the dyno numbers - very optimistic. The car is running 'factory' rich if (which also suggests the tail pipe upgrade had little effect) so it is not even optimal in stock form yet its putting down more than a 370. Regardless, its definitely a strong car

 

From what i understand is that dyno's with rollers CAN (not all the time) be way off and should really be used just for tuning. You can apparently change the readings just by strapping your car down tighter. Mustang dyno's have always been known to give higher numbers.

 

It's just a number. To make you feel even better, my HR with Injen CAI and Greddy EVOTT Catback dynoed a whooping 241whp on Sharif's DD.

 

During 2008, Nissan built 12 NRT (Nissan Racing Team) motors for formula competition. Only 7 were delivered. Word is that 5 motors made their way into NISMOs headed to the United States. There is no documentation as to which NISMO got the NRT motor. You may have 1 of only 5.

 

Lol

Talked to Tim and he is going to look into what went wrong. He is also going to personally dyno the car on the 24th, so I should have the 'real' numbers then.

 

take a quick spin down the ol 1/4 mile. Your trap speed is the real indication of horsepower. who cares what the dyno says

 

Dyno needs calibration, or maybe that's their idea of a good calibration. I can imagine them losing business when a gup comes in a sees his HPs are -120 from what the manufacter represented him. So the fix... recalibrate it to be optimistic.

 

Its not the numbers its the chart:

Excellent torque down low at 2,000 RPM.

Torque peaks at about 5,000 RPM. I would prefer to see torque more flat after 5,000 RPM. A tune may take care of this.

Horsepower is about a perfect diagonal line. This is good. The flat horsepower line at the top is acceptable.

 

torque should be higher in the lower gear... hence torque multiplication... FYI there are some shops that adjusted corrected #s to make it look like they are turning out high horsepower cars... didn't see correction ratio on your sheet... instead of trying the same "tweaked" dyno again try a different dyno... or try doing a pull in 6th and maybe you will get like 350whp and then you can say you have 350whp all you want

 

Had my stock 08 Z with only Nismo catback exhaust dyno'd on a Mustang Dynameter today, and it made 255 whp and 230 lb torque in 3rd gear. Which is about right in stock form.