Why do Evo's dyno in 3rd gear and not in 4th like all other cars? is our 3rd gear a 1:1 like oter cars 4th?

 

Every car I've seen that's 5 speed dynos in 3rd.. Supposed to be the longest gear in the powerband.

 

you're supposed to dyno in 4th. 1:1 is 4th gear not third.

 

I've only seen people dyno in 3rd. Would you net different #'s?

 

I have always dynoed in 4th gear.

 

Sometimes due to the limited amount of ventilation and cooling for the car on the dyno it is pulled in 3rd gear because it will generate less heat and allows more pulls with more accurate numbers (because there is less heat build up). 4th is a longer pull in a higher gear so there will be alot more heat generated (and lower dyno numbers).

 

I was under the impression 4th reads higher on a dyno than 3rd.

 

what gear you are in does not effect HP readings in anyway. IT DOES effect torque greatly tho do to the gearing. 1:1 ratio is what is is "supposed" to be. What gears do is multiple torque thats why u get a different reading or TQ only is different gears. THe lower the gear the higher the torque output.

 

mine has been dynoed at 2 different shops, one dyno jet and the other mustand dyno and both got dynoed in 3rd....im pretty sure its because of the power band in 3rd

 

Most shops will do 3rd gear pulls because of the speed required to tun a car to redline in 4th gear, no to mention that with low hp/tq cars a 4th gear pull can take a very very very long time.

You can always request a 4th gear pull, tune. I do as i need to know my AFR's a the end of the 1/4 with close to the correct load.

 

Hey all, How about if you have a 6 speed?

 

what would be the relative torque difference between 3rd and 4th gear?

 

On my 5-speed I was always tuned in 3rd, with my 6-speed its been tuned in 4th. Never asked Shiv why...

 

This is standard from what I've seen, the exception I guess would be the post above where the guy is saying it needs to be tuned for the 1/4 mile. Aside from the heat issue I mentioned earlier I don't know why this is the standard

 

beacuse in the 6 speed 4th gear is closer to the 5 spd's 3rd