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Originally Posted by hngonzalez Some shops wont dyno in 5th as the dyno itself has a top speed limit. The one I tested on is rated at 200 mph so

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Old 04-21-2010, 01:04 PM   #12 (permalink)
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Originally Posted by hngonzalez View Post
Some shops wont dyno in 5th as the dyno itself has a top speed limit. The one I tested on is rated at 200 mph so I think it should take 5th gear. The dyno also knew my car was in 4th gear and seemed like it showed the gear ratio. I dont know how big of a difference it will cause, but I suppose ill find out when I get it dynod again
Trust me your wheel speed in 5th is nowhere near 200 MPH. It is not even that close to 150 MPH. Your car needs to be dyno tested in 5th gear because 5th gear is your 1:1 gear ratio on this specific car with the 6MT. Your numbers are going to be lower in 4th and you will no generate as much wheel speed. Your car is under more of a load in 5th as well.

As far as some people saying the ECU does not need time to learn the new mod, they are WRONG. Miles put on the car are an adjustment period as well as multiple runs on the dyno. The ECU cycles constantly and whatever the cycle period it is in terms of miles is the adjustment period. I have done over 100 dyno pulls with the 370Z alone and on over 5 different cars. I have seen the pattern I just explained above formed on all of them.

I am confident that once you go back to the dyno and they dyno the car in the correct gear (5th) along with 6-8 pulls you will see the difference. Kyle @ Stillen and I do not agree on much but the one area where there is no argument is the multiple dyno pull method. I have applied it to all of the dyno testing we have done and it works.

Tony
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