Why 4th gear pull?

[CraiMart]

What would the reason be for moving from 3rd gear pulls to 4th gear pulls when tuning?

 

[XR650R]

4th is the closest to a 1:1 drive, so it's the most accurate for measuring actual power at the wheels. Of course, you get going quite fast doing that, so it's not really safe on public roads.

 

[Lays]

My tuner had me switch because 3rd gear was going to spin when we started turning it up.

 

[Sprinkle_Star]

probably because 4th is basically 1:1 ratio/direct drive

 

[green_henry]

4th is the closest to a 1:1 drive, so it's the most accurate for measuring actual power at the wheels. Of course, you get going quite fast doing that, so it's not really safe on public roads.

Yep, you're going to hit ~115

 

[Dpro]

My tuner had me switch because 3rd gear was going to spin when we started turning it up.

Yup we have the same tuner. I was doing 3rd gear pulls on pump gas with my S280 and was at the bleeding edge of tire spin . I am about to start tuning for E30 and he will probably tell me to switch to 4th gear pulls as I am sure I will have tirespin in 3rd.

 

[Lays]

Yup we have the same tuner. I was doing 3rd gear pulls on pump gas with my S280 and was at the bleeding edge of tire spin . I am about to start tuning for E30 and he will probably tell me to switch to 4th gear pulls as I am sure I will have tirespin in 3rd.

Weird, I only experience spin in part of second gear on pump, on e40 it'll definitely light em up thru all of second and some of third, lmao!

 

[haste]

It also puts a heavier load on the engine than 3rd gear which gives better engine data for the tuner.

 

[TyphoonFiST]

Yep, you're going to hit ~115

You will hit that faster than you think*

 

[drinkgasoline]

Switched to 4th due to tire spin in 3rd

 

[Woods247]

Lower tire pressures will help 3rd gear wheelspin.