How did I dyno this high? (not that I am complaining)

MattP725 · 08-22-2011, 07:14 AM

Nope the correction and uncorrected both showed. Corrected was around 5-8 HP higher so that doesn't explain it.

V8Killer · 08-22-2011, 07:30 AM

Just take it to the track man that is the best way to do it.

Cmike2780 · 08-22-2011, 09:48 AM

No roller dyno is 100% accurate. The only number anyone should be concerned with are the gains. What's to say most dyno's read low. It doesn't matter. It's not like the OP was comparing this to other dyno's and bragging about it. Dyno's are only tools to track your progress and figure out if your mods actually show gains.

Yeah PM's tend to read on the high side, but I really don't understand why people get so pissy about seeing a high number. A 10hp gain is pretty accurate for an UpRev tune.

98intrigue · 08-22-2011, 10:41 AM

Quote:

Originally Posted by Cmike2780

No roller dyno is 100% accurate. The only number anyone should be concerned with are the gains. What's to say most dyno's read low. It doesn't matter. It's not like the OP was comparing this to other dyno's and bragging about it. Dyno's are only tools to track your progress and figure out if your mods actually show gains.

Yeah PM's tend to read on the high side, but I really don't understand why people get so pissy about seeing a high number. A 10hp gain is pretty accurate for an UpRev tune.

Exacty. A 10hp gain is a 10hp gain no matter what dyno you're on...that seems to be the average gains from an UpRev tune. Matt, take this to the track and see what your Z can do. If Chuck's car dynoed around the same as yours, you should have a 12 second Z on your hands

Red__Zed · 08-22-2011, 10:45 AM

Quote:

Originally Posted by 98intrigue

Exacty. A 10hp gain is a 10hp gain no matter what dyno you're on...that seems to be the average gains from an UpRev tune. Matt, take this to the track and see what your Z can do. If Chuck's car dynoed around the same as yours, you should have a 12 second Z on your hands

Realistically, the percentage gain is more relevant. And you hope they don't change parameters between runs.

MattP725 · 08-22-2011, 11:00 AM

Quote:

Originally Posted by 98intrigue

Exacty. A 10hp gain is a 10hp gain no matter what dyno you're on...that seems to be the average gains from an UpRev tune. Matt, take this to the track and see what your Z can do. If Chuck's car dynoed around the same as yours, you should have a 12 second Z on your hands

Oh you will see me bragging if I run 12s lol.

I figured it was a bit high but I know they didn't change parameters between runs because I watched the screen through all the runs. They have a solid reputation and that sort of stuff would def show through.

While I'd like a universal standard I'm sure most of us with the standard boltons are within 5-10hp of each other so what is the true difference.

It was a fun experience regardless and the uprev was def worth it.

6MT · 08-22-2011, 11:09 AM

Quote:

Originally Posted by 98intrigue

Exacty. A 10hp gain is a 10hp gain no matter what dyno you're on...that seems to be the average gains from an UpRev tune. Matt, take this to the track and see what your Z can do. If Chuck's car dynoed around the same as yours, you should have a 12 second Z on your hands

For what it's worth.... my gain from baseline with an UpRev tune was 25whp. Nice to see, but I was more interested in the torque plot over an RPM range. The whp number really meant nothing to me. Besides, who drives their car at 7500 rpm all the time?

Cmike2780 · 08-22-2011, 11:21 AM

Quote:

Originally Posted by 6MT

For what it's worth.... my gain from baseline with an UpRev tune was 25whp. Nice to see, but I was more interested in the torque plot over an RPM range. The whp number really meant nothing to me. Besides, who drives their car at 7500 rpm all the time?

Wouldn't that notion apply to the torque curve numbers also?

MattP725 · 08-22-2011, 11:23 AM

Yeah to me that is definitely inflated too...

end of the day it just shows that numbers are not a definitive source of information.

vividracing · 08-22-2011, 12:38 PM

Quote:

Originally Posted by 6MT

That is the funniest thing I've read on here in a long time!!

Quote:

Originally Posted by 6MT

Well, do you think that if I were to travel down a very long hill and reach a very high top speed; that I would deduce that my car has more "power" than someone who runs a short run on a measuring device? Like a dyno? Trap speeds are measurements like dyno runs. But trap speeds can be very deceptive.... as the example above proves.

MattP725 · 08-22-2011, 12:46 PM

Quote:

Originally Posted by vividracing

The only valid argument for that would be differing alititudes and atmospheric conditions... that could technically affect the trap speed I would assume. Still a closer measurement across the board than dyno.

wstar · 08-22-2011, 12:59 PM

Quote:

Originally Posted by MattP725

The only valid argument for that would be differing alititudes and atmospheric conditions... that could technically affect the trap speed I would assume. Still a closer measurement across the board than dyno.

We can roughly fix up drag race results with a DA calculator (and I generally assume most tracks are level, not downhill lol): DA Calculator - Density Altitude Calculator - DragTimes.com

Main problem with drag results is they're indicative of more than just how your engine is doing. What tires you're on, track conditions, extra equipment that helps with setup and launching (e.g. suspension, line lock, etc), what kind of tire rubber you're running, skinny front tires you'd never use on the street, and of course driver skill.

Rooskey · 08-22-2011, 08:13 PM

Quote:

Originally Posted by wstar

Main problem with drag results is they're indicative of more than just how your engine is doing. What tires you're on, track conditions, extra equipment that helps with setup and launching (e.g. suspension, line lock, etc), what kind of tire rubber you're running, skinny front tires you'd never use on the street, and of course driver skill.

chuckd05 · 08-22-2011, 02:32 PM

I dynoed 343 last year than Less this year but my trap was
106.8 last year in fall weather this year trap was 108.9 in 97 degrees (literally)

So I have no idea what to think about there dyno other than it works for
Before and after tests.

MattP725 · 08-22-2011, 03:16 PM

I don't think the thick skin is necessary unless you are foolish enough to think your intake/HFC/catback of brand X is going to get you SUBSTANTIALLY different results than the next guy... it seems most of the Z cars are pretty much in line with each other all things being equal. I can't reasonably expect to be 40 hp more than the guy down the street with the same mods as me. Just doesn't work that way.

08-22-2011, 07:30 AM	#2 (permalink)
V8Killer A True Z Fanatic Join Date: Feb 2011 Location: Newport, NC Posts: 1,127 Drives: It Hard Till It Pops Rep Power: 17	Just take it to the track man that is the best way to do it. __________________ "Punch" Too much to list and a baby shot of nitrous....

08-22-2011, 09:48 AM	#3 (permalink)
Cmike2780 A True Z Fanatic Join Date: Jun 2010 Location: Long Island Posts: 5,059 Drives: slowwww Rep Power: 29	No roller dyno is 100% accurate. The only number anyone should be concerned with are the gains. What's to say most dyno's read low. It doesn't matter. It's not like the OP was comparing this to other dyno's and bragging about it. Dyno's are only tools to track your progress and figure out if your mods actually show gains. Yeah PM's tend to read on the high side, but I really don't understand why people get so pissy about seeing a high number. A 10hp gain is pretty accurate for an UpRev tune. __________________ [09][MB][6-Spd MT][Touring][Stillen Gen III][K&N][Borla CBE][Evo-R] [ArchitTEK Photography]

08-22-2011, 02:32 PM	#14 (permalink)
chuckd05 A True Z Fanatic Join Date: Oct 2009 Location: NY Posts: 2,391 Drives: No longer a Z Rep Power: 20	I dynoed 343 last year than Less this year but my trap was 106.8 last year in fall weather this year trap was 108.9 in 97 degrees (literally) So I have no idea what to think about there dyno other than it works for Before and after tests. __________________ 09 370Z 6M PW - FBO Best 1/4 mile = 12.926 @ 109 SOLD -- 08 BMW 135i - FBO 12.1@120mph SOLD -- white 09 e92 335 Coupe Mtech - 11.9 @ 119 :-)

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08-22-2011, 07:14 AM	#1 (permalink)
MattP725 A True Z Fanatic Join Date: May 2011 Location: Toms River, NJ Posts: 1,904 Drives: 2010 40th Rep Power: 17	Nope the correction and uncorrected both showed. Corrected was around 5-8 HP higher so that doesn't explain it.

08-22-2011, 11:23 AM	#9 (permalink)
MattP725 A True Z Fanatic Join Date: May 2011 Location: Toms River, NJ Posts: 1,904 Drives: 2010 40th Rep Power: 17	Yeah to me that is definitely inflated too... end of the day it just shows that numbers are not a definitive source of information.

08-22-2011, 03:16 PM	#15 (permalink)
MattP725 A True Z Fanatic Join Date: May 2011 Location: Toms River, NJ Posts: 1,904 Drives: 2010 40th Rep Power: 17	I don't think the thick skin is necessary unless you are foolish enough to think your intake/HFC/catback of brand X is going to get you SUBSTANTIALLY different results than the next guy... it seems most of the Z cars are pretty much in line with each other all things being equal. I can't reasonably expect to be 40 hp more than the guy down the street with the same mods as me. Just doesn't work that way.