Just wondering, what kind of RPMs are you at with 4.57 gears on an AP1 or an AP2 at 65mph or 80mph? I know the rule of thumb is about 500rpms over stock but I do not have an s2k and i dont even know what a stock cruising rpm should be at 80mph.

 

If I can recall right 80mph with my 57s in an AP1 puts me around 4500 rpms. I'll confirm it later tonight

 

stock AP1 at 80 is 4400, from what i "heard" its at 4700

 

AP1:
65 mph = 3900rpm
80 mph = 4900rpm

AP2:
65 mph = 3800rpm
80 mph = 4800rpm

As you can see, there is little difference in rpm between the 2 cars. Honda designed the AP2 tranny so that the highway cruising rpm didn't change much.

Stock AP1 is 3500 rpm and 4300 rpm respectively. Stock AP2 is within about 50 to 100 rpm of this.

 

Mine was 4900-5000 with just the 4.57's.
With the 4.57's and the AP2 transmission, it's around 4700.

 

Bookmark this site:
http://www.turnzero.com/technical_resource...gear_calculator

It will answer all your questions like this.

 

On the drive back to school I was doing 80....4900rpms

 

 

where can i get 4.57's?

 

hardtopguy.com