100ks @ What Rpm ?

[Doogs]

Hey all,

 

For selecting my cam i want to make sure that

i will be sitting well within the rev range of my cam at highway cruising speed, so

do any of you guys know, for your stock or modified k (preferably 4k, as i will have)

 

What rpm are you sitting at when you are at 100kph, in top gear ?

What is the stock diff ratio, or current ? (i can't find the stock one anywhere)

What is the stock wheel diameter/yours ?

 

Also, just out of interest, when does your engine start to valve bounce ?

 

Cheers guys, your help is much appreciated

[philba]

My KE70 with 4K and K50 will rev at about 3500 in 5th at 100kph, and about 4000 in 4th. The diff is either a 3.9 or 4.1, don't know exactly and my wheel/tyre combo is 14x5(?) and 185/65R14

[Doogs]

thanks philba,

 

does anyone have similar figures to this, what about with a 4 speed ?

 

cheers

[Wood§tok]

liberty sits at 2800rpm @ 101kph

mmm... usable 5th gear...

[ChrisGT]

use this web site:

 

http://akb.norbie.net/Public/Gearing.aspx

 

u need to know the gear ratio's of your box thou because it dosnt have the early corolla boxes stored in there.

[philba]

The 4 speed has a 4th gear ratio of 1.00:1 as does the 5 speed. Most (not all) gearboxes has a 4th gear ratio of 1.00:1 or direct and 5th and/or 6th are overdrives. And as for the old 3 speeds, 3rd will direct (1.00:1). As for a list of ratios for the K series boxes, I will find a link for you soon. I have seen them

 

Edit:- It's in the FAQ

Edited July 22, 2007 by philba

[Doogs]

cool, i figured that 4th would be about 1:1, and 5th an overdrive,

but was not sure.

thats all good though, as the rev figures confirms that a cam with a range of 2000-7000rpm is going to be good for a street driven 4k,

 

but i won't be thinking about changing boxes till later down the track, along with putting in an lsd,

 

thanks for your help guys