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Originally Posted by nastyboxster
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Question for dyno experts
1. How much of a difference can it vary? (clubhead mentioned 2-3hp)
2. If it's only 2-3hp, does it matter since I won't be able to feel it anyways.?
3. I've seen several Boxster S dynos with no mods and it's between 220-225rwhp. Anyone seen any with below or above it?
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Need to qualify I'm no dyno expert but I'll try.
The main concern if you dyno between a period of time can also be attributed to the machine itself. These machines are sensitive equipment and by themselves, will already have a certain amount of variance. This will be excerbated by other elements like intake temp, humidity, car's engine oil temp, new/old plugs, etc.
Now IF the machine owner recalibrated the dyno in between (and you will not necessay know this), the variance would even be greater.
So to be safe, do the before dyno before you plug in the new program. Plug in the new program and go for a 20 mins drive. Then do the dyno again. It's a hassle but it's the only way to satisfy yourself that those gains are mainly due to your new program. The variance can be 2-3bhp but if the gains are 5bhp, you may be getting only 2 bhp increase with the variance taken into account. This is assuming the machine read lower than actual. Aren't you gonna feel ****************ty if you've spent $1k on a program and thought you've only gained 2bhp but actually it's 5bhp? Or vice versa....
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