Weather station ET predictor suggestions

[Altronics]

Originally Posted by FireSale

I have a PerformAIRE Eclipse, which a lot of my fellow racers swear by but I swear at. I routinely run 0.2-0.3 under the devices prediction.

Here are the predictions and my ETs from last Sunday:
13.18/12.858
13.14/12.835
13.146/12.817

I burned hours trying to come up with a number to subtract from the machine for my dial, but If I had ignored it and paid more attention to the free time slip I would have just dialed 12.80.

We invented and have been manufacturing PerformAIRE weather stations for 25 years. I don't think we would have been doing it this long if our systems were not capable of working correctly.

In order for any car to be predictable with any weather system the car must be repeatable and jetted correctly to respond to air change. If your car will NOT run the same 60' (+/0.002) and ET(+/-0.005) on back to back runs in the with the same DA (+/-100DA), it will never be more predictable then its best back to back run.

Also very important is the Data you enter. Garbage in Garbage out.

Per our instructions: You need to have at least 1000' change in DA across 5 to 6 runs in order to generally get a good prediction. Entering 2 or 3 runs with only a few hundred feet change in DA will generally NOT give a good prediction.


We are always happy to take a look at your data and try to help you. You are free to email us directly with the run information you are trying to use, or if you like post it here and I will comment on it.