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Concerningly low dyno #s
Thread Starter
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Joined: May 2008
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Concerningly low dyno #s
peak hp: 290.9 @ 5875
peak torque: 300.2 @ 4200
2005 c6, f55 m6
mods: Vararam cai, GCA exhaust. Everything else stock
location: 034 Motorsport in Fremont, CA. 11am, around 70 degrees. Land and Sea Dyno
I didn't get a chance to really ask any questions, place was an audi/vw shop with a promotion going on that day. The runs were $55, so I figured why not. My friend went before me with his new (7k miles on the od) bone stock '09 Toyota Yaris which put down 77hp @5911rpm.
Is their dyno reading low or should I be heading to a shop to have my engine checked out?
Last edited by Dizzy; Jun 22, 2009 at 11:04 AM.
Le Mans Master
Joined: Oct 2007
Posts: 6,149
Likes: 11
From: Greater Detroit Metro MI, when I'm not travelling.
DYNOmite... Says so at the top:
Looks incredibly low. My car put down the following on RPM motor's DYNOmite dyno with an intake, headers, exhaust and a tune:
Your car should be making between 340 and 360hp/tq at the wheels.
Does it feel wrong? It is entirely possible that the dyno was not calibrated properly or that the test was not conducted correctly... If it was my car I'd re-dyno elsewhere just to be sure.
Looks incredibly low. My car put down the following on RPM motor's DYNOmite dyno with an intake, headers, exhaust and a tune:
Your car should be making between 340 and 360hp/tq at the wheels.
Does it feel wrong? It is entirely possible that the dyno was not calibrated properly or that the test was not conducted correctly... If it was my car I'd re-dyno elsewhere just to be sure.
Thread Starter
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Joined: May 2008
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Neither, Land and Sea.
I was wondering if their test had in fact been done correctly/properly. Doesn't even look like they brought the revs up past 6k before they let off on my chart. As for the feel of the car, I've riden/drove in several other stock vettes on many occasions, my dad having owned 2. I've felt nothing that would make me think there's anything wrong.
I was wondering if their test had in fact been done correctly/properly. Doesn't even look like they brought the revs up past 6k before they let off on my chart. As for the feel of the car, I've riden/drove in several other stock vettes on many occasions, my dad having owned 2. I've felt nothing that would make me think there's anything wrong.
Last edited by Dizzy; Jun 22, 2009 at 11:10 AM.
Le Mans Master
Joined: Oct 2007
Posts: 6,149
Likes: 11
From: Greater Detroit Metro MI, when I'm not travelling.
Melting Slicks
Joined: Oct 2000
Posts: 3,368
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From: dfw Texas
i have never seen a car dyno on that before so i dont know how it compares to say a dyno jet or a mustang dyno. I would go to a dynojet and see what it puts down. for all we know that brand of dyno could just read low...
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Le Mans Master
Joined: Oct 2007
Posts: 6,149
Likes: 11
From: Greater Detroit Metro MI, when I'm not travelling.
Le Mans Master
Joined: Oct 2007
Posts: 6,149
Likes: 11
From: Greater Detroit Metro MI, when I'm not travelling.
Neither, Land and Sea.
I was wondering if their test had in fact been done correctly/properly. Doesn't even look like they brought the revs up past 6k before they let off on my chart. As for the feel of the car, I've riden/drove in several other stock vettes on many occasions, my dad having owned 2. I've felt nothing that would make me think there's anything wrong.
I was wondering if their test had in fact been done correctly/properly. Doesn't even look like they brought the revs up past 6k before they let off on my chart. As for the feel of the car, I've riden/drove in several other stock vettes on many occasions, my dad having owned 2. I've felt nothing that would make me think there's anything wrong.
Not saying they did that, but its a possibility.
Melting Slicks
Joined: May 2004
Posts: 3,017
Likes: 2
Don't they have to input the weight of the car before running the test? Could be an easy way to fudge numbers. Numbers are no where near correct.
Melting Slicks
Joined: May 2006
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From: NJ..."the way I saw it, everyone takes a beating sometimes."
99% sure it's the dyno/operator. The Corvette plant would have to really f*ck something up to have your car dyno 50+rwhp less than every other mass produced C6. You would certainly feel a 50+rwhp difference between your car and your father's or whomever elses' you've driven. You say the car is running fine so unless you want to dyno elsewhere for simple peace of mind, you can throw out these results and just enjoy your car. 
Team Owner
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From: Northern, VA
St. Jude Donor '15
"In honor of jpee"
j/k OP. Not possible.....
Le Mans Master
Joined: Oct 2007
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From: Greater Detroit Metro MI, when I'm not travelling.
Like any other dyno, it is just a tool, and it can be used improperly. But there is nothing wrong with that make of dynos; someone probably paid around $80,000 for it.
Safety Car
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If the black line represents your AFR, it is all over the place and that could be a problem or just a bad dyno operator/sensor.
Race Director
Joined: Sep 2007
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From: Peoria/Phoenix AZ
C6 of Year Finalist (performance mods) 2019
If all you want is a high number on a dyno sheet, just tell the operator what you expect ahead of time. He'll make it happen.
If you are tuning or needing a baseline before mods, let the operator know that too. Be sure to return to the same place to get comparative results. Don't be concerned with the resulting numbers, but only with the changes.
If you are tuning or needing a baseline before mods, let the operator know that too. Be sure to return to the same place to get comparative results. Don't be concerned with the resulting numbers, but only with the changes.
