Dawie

Hey, what will the difference be if I put a v6 diff in my 2.0 sapphire and can anyone recommend something like that?

dojj

iTrader: (3)

it'll be longer geared assuming the 2.0 is a dohc with the 3.92:1 diff as opposed to the v6 3.62:1 diff

Dawie

Hey dojj, would u mind explaining me please, the v6 diff have a lower ratio than the 2.0 it seems according what u are0 telling me, how do it work that the gears will be longer? Is it advisable to do something like that in you're opinion? Will my car have a better fuel consumption?

dojj

iTrader: (3)

the v6 makes more power and torque than the 2.0 so it is able to run higher gearing wihtout struggling

the 2.0 needs 3.92 rotations of the propshaft to turn the rear wheels one rotation
the v6 needs only 3.62 rotations to turn the rear wheels one full rotation

the theory says that you will get better fuel economy yes, but at the loss of acceleration and potential top speed, but when i fitted a 3.14:1 diff to my sierra i was getting better acceleration than a more powerful car fitted with the 3.92 diff, in fact, his had 140 brake and mine only made 129 and his torque figure was higher than mine, but in a straight line, i was leaving him for the proverbial dust as we both came out of the last corner at silverstone him leading me in second gear, then we both accelerated and he shifted to 3rd then i shifted to 3rd, then he shifted to 4th and i was past him

he must have had 10 car lengths on me at the start of the straight and i must have had at least 20 car lengths on him at the end

as this picture shows, the straight can't be more than about 500 metres long



as for economy, on a cruise with the standard diff the best i ever got out of it was 132 miles from 8.08 litres of fuel but after the diff was fitted i never really took any dedicated readings

Dawie

What engine was in you're sierra and did it had modifications done to it?

dojj

iTrader: (3)

dohc, no mods
mate had same engine but with exhaust, cams, chip

Dawie

So what cam did you had in? You ran fuel injection as well?
And u had branches on your outlet?

dojj

iTrader: (3)

everything on the engine was standard, even the air filter

my mate however had a 4 branch manifold, air filter, cams and an ecu chip

Dawie

So would u think I can pull that V6 diff with a kent cam, 40 side drafts and a branch?

Dawie

The 3.14 diff, where do it originate from? V8?

dojj

iTrader: (3)

mine came from scandinavia mate, from their 2.8 rwd estate car

apparently you can get it in a 7 inch version as well as the 7.5 inch but although 2 peole say they've got one, i've never actually seen this

Dawie

Here in south africa by us isn't a big variety of diffs and stuff and it cost a lot of money to do shipping on that stuff, maybe I must just stay by the original