right i have a ke20 rolla and ive swapped the original moter and tranny for a 5 k and 5 speed manual from a ke70 rolla and I'm not getting any economy on the highway. 3500 rpm at 100 ks an hour so i was just wondering what diff ratios were offered from the factory and if anyone knows of any for sale or anything else that could be suitable

Umm, most common ratio is a 4.1. 4.3 are available with a bit of looking around. I think there are also 3.9's and 4.5's, but both are quite rare.

yeah i was looking more for something around 3.5:1

does anyone know any other ways around the problem

As far as I know te best you will get is a 3.9 out of a KE50 import. Rocking horse poo if you can get it. What's in it at the moment? Belive it or mot, going from 4.3 to 4.1 makes a fair bit of difference, the only thing is, you'll still be doing 3500 rpm at an indicated 100 because you've changed the final drive. The trick is knowing where 100 actually is.

 

Or you could put on bigger tyres.

Edited June 23, 200521 yr by Redwarf

i had this problem with daisy....she came with 4.44's stock, i put in 4.22's, then put in a starlet kp61 diff and got 3.20's

no american starlet had an lsd, or 2.XX ratio.

but they are really weak. i went through about 4 of them doing tire burnouts until they popped.

i finally switched up to a te28 rear with 4.10's and just swapped to 3.58's 2 days ago. i couldn't be happier

Edited June 23, 200521 yr by mikeys toy

3500, man you're lucky, mine sat at 4000+ :down:

there's no 3.5 corolla diff, and your car would be really slow off the mark if you put one in, it would suck. i think there's a 3.7 rx7 diff

 

oh, you could look at imported starlet diffs, they came in some stupid ratio like 2.7. you'd need to get an axle code and cross reference it with the wiki (or faq, or matti's page)

I'd be checking your speedi accuracy. 3500 seems high in 5th.

 

Or do some calculations as to how many revs you should be pulling at 100km/h. Need to check up on how to but it is not that hard

no, it's right. these cars are geared pretty high from factory, he's probably got 4.222 or something in there now

my KE70 with a 4.1 sits on about 3750RPM @ 110km/hr on the highway i thnk..

LOL, my 5k does 4200 in 5th at 100km/h. has 185/60r13 tyres and a 4.55:1 diff.

 

fuel consumption was fine when i was living on the mountain, and doing alot of 60km/h work. now living out in the country i find it is not so good, extended cruising at over 4500 rpm uses the juice, although i'm still getting around 11km/L. acceleration is good for passing... :down:

 

thinking of going back to a 4.22 with the 5k.

can't remember my KE35 being up so high with 4.3 gears. Something around the low threes was around the mark with 225/60/13 tyres in 5th gear

Hi

I have a 3.7 (from a ke20 type housing) that I swap in and out of my race car so they were made. It was hard to find and I'm now looking for a 3.9 which would be the ideal ratio for my car and present engine. Mostly I use the 4.3 as it suits short tracks and hill climbs.

yeah thanks for the info I'm pretty sure i was doing around 100 ks as i was keeping with the traffic at a 100 km an hour road

yeah a 3.9 would be very good

does anyone know the location of one?

the jap model ke70's had a 3.9 AFAIK.

the 82 TE72 had a 3.58, i now do 80 MPH @ 3,800....so i am happy....no power up hills, especially with the a/c on, but i have already noticed a 2mpg increase in milage

the te38 i just found has 3.75's in it......