nevsrevs

what are you peeps using for your zetec turbos, are the diesel ratios ok for a track car, i know there different from the 66kw 72kw and 85kw, thoughts please.

Rick

I have a Focus RS ratios with a diesel diff.

Rick

nevsrevs

i am going to use a plated diff, [gripper] but need a new box and can only find derv boxes, so dont want to end up with crap ratio box for track use

J1mbo

iTrader: (1)

How did you do that? Focus rs gear set with diesel crownwheel, does the pinion swap to suit or??

J1mbo

iTrader: (1)

Double post

nevsrevs

i would like to know too

nevsrevs

bump\\\

xr2wishy

iTrader: (2)

me too, should swap over though.
i run a standard FRS box, at 3200rpm it does bang on 70mph (calibrated stack speedo) on 195/45r15 tyres, top speed on limiter of 7500rpm (currently) will give a top speed of 164mph.
if that helps at all.
diesel final drive may be better unless you run bigger wheels, which i can't really on a mk2 fiesta.

Rick

yes, crown and pinion swap

J1mbo

iTrader: (1)

Rick how does the pinion come off is it a big job?

I have a diesel box in mine with quaife diff, and the gear change is a little funny, I was told gears are designed to run at a certain speed, and maybe I'm running them two fast (all sounds weird to me) so was thinking put a petrol box in with deisel final drive, do you no what sort of gearing that would be?

nevsrevs

our car will be running on 17" on slicks, dont want to end up with a sprint box, or too long a gear, was thinking about the middle powered derv box ratios? just cant seem to find a petrol box for sensible moneys, and dont get me started on diff prices

nevsrevs

anyone?

Rick

pinion needs a press to change, but easy for a transmission place to sort. I use the 3.41 diff with Focus RS ratios. Focus RS runs big wheels so has a lower 3.82 final drive as std. 5th is 0.85.

J1mbo

iTrader: (1)

Rick sorry for all the questions mate, but what would the petrol ratios be like with the deisel final drive on 205/40/17

I have the deisel box at the min

37
58
95
125
165

On mine ATM!

Rick

what are you revving to?

J1mbo

iTrader: (1)

6500 really, the limiter is at but only rev to 6500

nevsrevs

do you know wat derv focus that box came out of jimbo as they state 3 diff ratios for them, 3 for each power hike

J1mbo

iTrader: (1)

Mines out the escort van

nevsrevs

think im going for middle powered focus derv seem the best ratios for us