ratio wizzards wot should i run

[R1.Andy]

hi all those with an answer

creep creep...right that bits done..

im restoring a mk1 tina and im getting all the bits ready

but wot diff should i run

its having a 17 x flow bit of mild work done to it running a 36 36 dgas i think on a t9 5 speed box

i wanna ne able to use the car to get around to shows so there will be some ditance work..

i also want to be able to smoke the back tyre's out with ease..i no child..

so me question is wot diff with set up above

iv got a 3.7 a 3.9 and a 4.1

years ago i used to quickly change diff from a 3.7 to 4.1 if i felt the need to play.

im not looking for top speeds but would like it to cruise well around 80 to 100 with out loads of revs and i dont want the fuel guage to go faster than the car..

but for around town i would like to be able to get toungs wagging when i leave the lights

all comments appriceated

[sambo]

4.1 mate. A great all rounder! Might be cruising a little slower than 80 though, but the 4.1 will make the rears light up nice and easy.

[Toby]

iv got a 3.7 a 3.9 and a 4.1

years ago i used to quickly change diff from a 3.7 to 4.1 if i felt the need to play.

 

Answers in the question - best compromise IMO - 3.9

[Guest MK1gaz]

3:9 if you wanna go 80mph for long

[Fiesta Steve]

Tyre size will make a big difference

 

..as much as changing the diff

[R1.Andy]

Tyre size will make a big difference

 

..as much as changing the diff

 

im gonna run 175 /70 i think thats wot i had fitted..i used to run 60's but the arch looked empty on the fronts.

[Baz.]

like steve says, wot size tyres are you using??

[Baz.]

70 series tyre i would go for a 4.1

[R1.Andy]

ya just looked 185/70/13

[Guest MK1gaz]

ya just looked 185/70/13

4:1 then

[Toby]

I used to have 205 / 60 / 13's (which are probably comparable) on a 3.9 and it was a really good compromise. I hadn't taken tyre size into account though with my initial response

[emu]

4.1 will be fine with 185/70's

 

I use one with 185/60's and its fine for running up and down the motorway at '70'