08-14-2009, 08:48 AM | #17 (permalink) | |
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08-14-2009, 08:54 AM | #19 (permalink) |
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What I am interested in, then, is how gains are going to compare across dynos. I'm going to go back after I install my Injen intakes, which Injen claims gains 15whp. Their test was on a DynoJet and the gain amounted for about a 5.3% gain with a 279whp baseline.
If I baseline at 243 whp, I wonder if I could use that 5.3% and estimate a gain of 12whp. I think there are too many variables so I doubt I can do a linear comparison but it will be interesting to see what comes of it.
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08-14-2009, 09:02 AM | #21 (permalink) |
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I will post up a detailed thread. Install pics, dyno vids, and all. I should have the intakes next week and will install them over the weekend. I'm planning to drive the car for a week before a dyno just to give everything time to adjust.
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08-14-2009, 09:32 AM | #23 (permalink) |
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That's what I'm doing. Baseline tomorrow, dyno after intakes in 2 weeks, and then again after FI CBE.
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08-14-2009, 09:59 AM | #25 (permalink) |
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Gentlemen... I am not a noob.
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08-14-2009, 10:23 AM | #26 (permalink) |
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Sigh. Different dyno's read different numbers - ESPECIALLY if a load is put onto it! A Mustang or Dyno-Dynamics dyno will generally read low. Altered Atmosphere's dyno is a Dynojet dyno, which doesnt put a load on the motor. They always read higher than others. I will put money that the OP's dyno was a dyno of the type that puts a load on the driveline.
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08-14-2009, 02:53 PM | #28 (permalink) |
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Well Hell
So basically most of you agree that not one dyno is accurate. One thread said " A normal dyno" which to me sounds a little broad. How about this I will go to three different dyno shops and pay three times what I want to pay and take the average. I do believe that most dyno shops have to have their machines calibrated by the state of some sort to charge customers money and be considered a business.
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08-14-2009, 03:03 PM | #29 (permalink) |
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The best thing you can do is pick a shop/dyno and stick with it for the life of the car. I did my baseline with a dyno dynamics at a certain shop and will be going whenever I feel I need to re-dyno my car after an upgrade or need a tune from them.
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08-14-2009, 03:06 PM | #30 (permalink) | |
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There is no such thing as a "normal" dyno or a right vs. wrong dyno. We have our reasons for choosing a Dyno Dynamics over the other choices, but that does not mean that we feel DynoJet numbers are irrelevant. They are simply using a different scale than ours. The important thing is that you remain consistent on the brand of dyno that you go to. A DD's numbers will be comparable to just about any other DD's numbers, but directly comparing a DD result to a DynoJet gets a little more fuzzy. The only *true* way to measure horsepower output is through an engine dyno, not a chassis dyno. All we can realistically do is measure gains from our baseline on X dyno to the results on the same type of dyno. |
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