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Cayman Dyno ChartsThis is the forum to post your dyno charts showing the results of various performance modifications.
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Stock Cayman S vs. Cayman S with Borla Race Exhaust
Test Vehicle: 2007 Cayman S, 6 Speed Manual with 5,962 miles. Test completed by Farnbacher Loles on Dyno Dynamics Dynamomoter.
Stock Cayman S (RWHP):
Cayman S w/Borla 12653 Race Exhaust Installed (RWHP):
Stock Cayman S (BHP):
Cayman S w/Borla 12653 Race Exhaust Installed (BHP):
Overlay Comparison, Stock Vs. Borla (BHP):
Farnbacher Loles
Farnbacher Loles launches Power Plus
Our exclusive new line of “Power Plus” kits will give you the extra performance you seek with the uncompromising quality and proven results that has made Farnbacher Loles the leader in Porsche performance.
BORLA PERFORMANCE INDUSTRIES is the leader in the design and manufacture of stainless steel performance exhaust. We began two decades ago as a manufacturer of exhaust systems for such "concours classics" as Rolls-Royce and Ferrari cars and have evolved into the premier manufacturer of today’s performance vehicles for the street, off-road, and racing.
__________________ Gator Bite
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Last edited by Gator Bite; 03-05-2008 at 05:01 PM.
Look at the variance between runs on the stock system. Probably +- about 10 or 15 hp over 5 runs. If you kept doing runs you would see that it would continue to happen like that. The accuracy is only around 3%, this is normal for a dyno.
With the Borla exhaust, only 1 run is shown. We can assume that across 5 runs, it would vary as well, within about 3% either up or down or both.
So if you are thinking "20hp from this product", I would say that with this data, you shouldn't draw that conclusion. Rather, with a 3% variance you would guess that subsequent runs would yeild 5 to 35 hp over stock. For former would be true if this run is at the "high" end of the variance range, and the later true if this single run is at the "low" end of the variance range.
For marketing purposes, if a company supplies a dyno comparison versus stock, they often take the "low" stock run and the "high" product run, exaggerating the average difference by at least 3% of total HP. However, these results were done by a forum member so really it may be more fair than that, but its hard to say from 1 run.
Tests have shown that most people can only notice changes in hp above 10%, if sound and other factors do not also change. So arguably, that would mean that your car won't feel faster unless you gain 30whp. Practically speaking though, with any exhaust you will "know" your car is faster and it probably sounds louder or has more vibration, and so you'll think you can feel a performance difference too.
Borla
BORLA PERFORMANCE INDUSTRIES is the leader in the design and manufacture of stainless steel performance exhaust. We began two decades ago as a manufacturer of exhaust systems for such "concours classics" as Rolls-Royce and Ferrari cars and have evolved into the premier manufacturer of today’s performance vehicles for the street, off-road, and racing.
However, these results were done by a forum member so really it may be more fair than that, but its hard to say from 1 run.
He did nine runs and threw out the first which came in at 318. Most of the other runs came in right at or very near 315 as Gator Bite posted elsewhere.
Look at the variance between runs on the stock system. Probably +- about 10 or 15 hp over 5 runs. If you kept doing runs you would see that it would continue to happen like that. The accuracy is only around 3%, this is normal for a dyno.
With the Borla exhaust, only 1 run is shown. We can assume that across 5 runs, it would vary as well, within about 3% either up or down or both.
So if you are thinking "20hp from this product", I would say that with this data, you shouldn't draw that conclusion. Rather, with a 3% variance you would guess that subsequent runs would yeild 5 to 35 hp over stock. For former would be true if this run is at the "high" end of the variance range, and the later true if this single run is at the "low" end of the variance range.
For marketing purposes, if a company supplies a dyno comparison versus stock, they often take the "low" stock run and the "high" product run, exaggerating the average difference by at least 3% of total HP. However, these results were done by a forum member so really it may be more fair than that, but its hard to say from 1 run.
Tests have shown that most people can only notice changes in hp above 10%, if sound and other factors do not also change. So arguably, that would mean that your car won't feel faster unless you gain 30whp. Practically speaking though, with any exhaust you will "know" your car is faster and it probably sounds louder or has more vibration, and so you'll think you can feel a performance difference too.
Kor,
I applaud your skepticism. I'd be wondering the same thing. As Sapentia mentioned, here is my post from another thread elaborating on the different nuns.
Quote:
Originally Posted by Gator Bite
Bill,
When I had my car tested, Kip at Farnbacher told me that Caymans usually need 5-8 runs to 'settle down'. When I asked him what that meant, he explained that the ECU was very adaptive and that they could keep doing runs and keep getting different results as the ECU adapted to the many different fuel/timing maps that are available. He told me that they keep repeating runs until the car starts delivering consistent results, and in his experience a Cayman would typically do this in 5-8 runs. This is called a 'Shoot Out' and considered to be the most accurate way to dyno a car. Sure enough, my car kept climbing in HP until run 4 at which point it flattened out and run 5 was near identical (294 BHP).
When I returned for my 'after' dyno, Kip did 9 runs. Why? Because the first run was very high (318.2 BHP) and then the next two runs were lower. The high first run was suggestive that there might be more power to find. But the last 5 runs were all very consistent (315 BHP). The 318 was discarded and the 315 was chosen as the median.
I too would like to see all 9 runs on one graph. Next time I visit F/L I'll have Kip pull my file and print it up.
Farnbacher Loles
Farnbacher Loles launches Power Plus
Our exclusive new line of “Power Plus” kits will give you the extra performance you seek with the uncompromising quality and proven results that has made Farnbacher Loles the leader in Porsche performance.
Borla
BORLA PERFORMANCE INDUSTRIES is the leader in the design and manufacture of stainless steel performance exhaust. We began two decades ago as a manufacturer of exhaust systems for such "concours classics" as Rolls-Royce and Ferrari cars and have evolved into the premier manufacturer of today’s performance vehicles for the street, off-road, and racing.
__________________ Gator Bite
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Tests have shown that most people can only notice changes in hp above 10%, if sound and other factors do not also change. So arguably, that would mean that your car won't feel faster unless you gain 30whp. Practically speaking though, with any exhaust you will "know" your car is faster and it probably sounds louder or has more vibration, and so you'll think you can feel a performance difference too.
One more thing. I totally agree with you on this. Before I had that 'after' dyno test done, I had driven the heck out the car and tried to determine if I could feel a difference in power. My butt dyno kept saying there was a slightly noticable difference, but nothing dramatic.
I think this is very subjective. Guys like you and me (skeptics, realists, pessemists, what ever you want to call us) won't feel much difference. Optimists on the other hand will.
__________________ Gator Bite
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I think this is very subjective. Guys like you and me (skeptics, realists, pessemists, what ever you want to call us) won't feel much difference. Optimists on the other hand will.
I don't think it shows up as much in feel (apart from sound) but in noticing a difference at the end of a straight on the track or on a favorite strip of hwy. After 10 seconds of acceleration you realize you are going faster than you used to in that particular situation, that kind of thing. Same as with suspension upgrades realizing you can take a turn 10 mph faster than previously.
The stock vs borla chart shows the stock hp and torque starting lower in the rpm range. Is this correct or just an artifact of the testing? In other words are we sacrificing low end for top end?
Borla
BORLA PERFORMANCE INDUSTRIES is the leader in the design and manufacture of stainless steel performance exhaust. We began two decades ago as a manufacturer of exhaust systems for such "concours classics" as Rolls-Royce and Ferrari cars and have evolved into the premier manufacturer of today’s performance vehicles for the street, off-road, and racing.
