Upgraded Gears/Tires? What are your RPMs?
Thread Starter
JK Junkie
Joined: Jul 2007
Posts: 3,193
Likes: 2
From: Boston, MA
Upgraded Gears/Tires? What are your RPMs?
Out of curiosity, for those of you with upgraded gears and tires, what RPM's are you seeing?
Please post your:
Transmission type
Tire size (exact size and brand would be great)
Gear Ratio
For manuals: What is the RPM range in 5th gear at 65mph?
Please post your:
Transmission type
Tire size (exact size and brand would be great)
Gear Ratio
For manuals: What is the RPM range in 5th gear at 65mph?
JK Super Freak
Joined: Sep 2007
Posts: 1,623
Likes: 5
From: Lawrenceville, NJ
If you want an easy range...just look at the percentage differences from what you have....if you get gears that are 10% deeper, your rpms will be 10% HIGHER.
If you get tires that are 10% larger in diameter, your rpms will DROP 10%, etc. (The tire makers typically list the rpms per mile for their tires, by size...you can compare that # to your stock tire's rpm/mile, and get a percentage difference that way too.)
That's why if trying to stay with a stock feel, if you get tires that are 10% larger, you'd swap in gears that are 10% deeper to compensate....if you want a boost in ooomph, you'd go a bit deeper than that in gearing to make up for the weight you'll probably add later, etc.
If you get tires that are 10% larger in diameter, your rpms will DROP 10%, etc. (The tire makers typically list the rpms per mile for their tires, by size...you can compare that # to your stock tire's rpm/mile, and get a percentage difference that way too.)
That's why if trying to stay with a stock feel, if you get tires that are 10% larger, you'd swap in gears that are 10% deeper to compensate....if you want a boost in ooomph, you'd go a bit deeper than that in gearing to make up for the weight you'll probably add later, etc.