scoobydo20

I am trying to work out what is the difference between the turbo, wrx and sti gearboxes not the dccd type just the normal boxes. I have a turbo gearbox and have had to do the clutch and someone is offering me a sti gearbox and i am trying to find out what the difference is speed wise? can anyone help i only have 2 hours to make my mind up fanks.

BRAVEHEART_STI

iTrader: (20)

sti gearboxes have a different final drive and different ratios ? top end speed seems lower than that of the wrx and especially uk but going through the gears is quicker and obviously you know that the gearbox is useless without the rear diff to match it ?

172sport

iTrader: (6)

Gearbox codes would help.

GearHack: Subaru Transmission Chart

Gearboxman - ratio calculator tool

Simples....

scoobydo20

6m ty752vn4ba any help?

joz8968

iTrader: (13)

To put it simply, when compared to the 'bottom of the pile' - i.e. a regular UK Turbo 2000 - then:-

1) WRX - shorter gearing (combo of ratios/FD)
2) STi - even shorter gearing! (combos of ratios/FD)
3) MY97>on STi Type R/RA DCCD - ultra short gearing!! (combos of ratios/FD)

See 172sport's web links for specifics....

172sport

iTrader: (6)

Remember the STI's can pull another 1000rpm over a std wrx/uk thats why they still have a decent top end speed given the ratio's

BRAVEHEART_STI

iTrader: (20)

dont mean 2 burst ur bubble lol but that gearbox is for UK/Europe Impreza Turbo 2000 / GT MY96 according to a chart so its not an sti one ? is that the code of the one you have been offered or ur own one ???

joz8968

iTrader: (13)

^^^ He's right you know!

BRAVEHEART_STI

iTrader: (20)

its a vn4ba mate not a vb4ba its a uk gearbox

joz8968

iTrader: (13)

Sure, but that's just down to the deliberately raised rev limit of STis, because of their stonger engine. Isn't it?

BRAVEHEART_STI

iTrader: (20)

sorry mate just lost posted before u edit there lol

joz8968

iTrader: (13)

Yeah, no worries BH - I KNEW that would happen

I just noticed the N istead of the B at the last second after my original post was posted!

BRAVEHEART_STI

iTrader: (20)

came home today from crail with the v3 ( after the fking place being shut ) lol and going home was a drag sitting at 4-5k all the way home doing about 100 , thats the bad part although from the take off up to 4th they seem to be good but u better have strong legs pushin that clutch in and out all the time with the short gears

scoobydo20

that is my code, and i want to upgrade but i want a sti box?

BRAVEHEART_STI

iTrader: (20)

to be honest mate if u aint going above 300hpatw then the uk would be a better bet unless u r gettin the rear diff to match with the sti box that u want ? u might get a bit sick of motorway driving with an sti box but its down 2 personal preference

BRAVEHEART_STI

iTrader: (20)

just curious but the back of ur car has WRX and has a uk gearbox ? whats your applied model code on the vin ?

172sport

iTrader: (6)

What do you think you are upgrading too????

What do you want from the box top speed wise?

joz8968

iTrader: (13)

sd20, getting inolved in swapping around gearboxes on the Impreza can get tricky - your best bet is to give API David a call about what's possible as a straight swap (inc rear diff).

He'll no doubt be able to tell you for DEFINITE which STi tranny codes will work properly on your car (if any)...

BRAVEHEART_STI

iTrader: (20)

most tranny's from 94 to 2000 will fit from uk's , wrx's and stis as long as tehy are not dccd , unless u get the dccd ecu and loom ? not too clued up on dccd fitments but non dccd,s should fit even some new age ones fit also

BRAVEHEART_STI

iTrader: (20)

just remember to have a matching rear diff lol and keep all your tyre profiles the same or it messes with the awd and can damage diffs and ruin tyres lol

scoobydo20

well the problem i have is, i got 304.2 BHP at the flyweel but im only getting just 198.3BHP at the wheels, we are just fitting a stage 3 ctutch because my new stage 1 gave up with 1 santa pod day lol. so i think my old clutch was not correct for the car hence the new clutch, but still i want more at the wheels, oh and i have a 4KG flywheel. any ideas?

scoobydo20

the vin i couldnt tell u of the top of my head but it is JF something if im correct

BRAVEHEART_STI

iTrader: (20)

if u go to the pod etc then an sti box and rear diff may be what u need as the sti boxes gearing imo is better for trackdays and fast road fun just make sure u get the rear diff as mentioned to match

BRAVEHEART_STI

iTrader: (20)

jf ? SHOULD START WITH GC8 UNLESS I TOLD U TOO LOOK AT THE WRONG BIT LMAO

scoobydo20

the vin is jf1gc8k.....

172sport

iTrader: (6)

A WRX set of ratio's isnt a bad compromise with an 0.825 5th and 4.111 diffs, gives a top speed of 150mph at 7250rpm

BRAVEHEART_STI

iTrader: (20)

IF MEMORY SERVES THE VIN PLATE ON A UK MODEL IS ON THE DRIVER SIDE SUSPENSION TURRET NOT THE PASSENGERS LIKE THE JAP SPEC ( sorry ) and i dont think uk starts with gc8 either or i could be wrong

BRAVEHEART_STI

iTrader: (20)

so ur car is not a wrx its a uk turbo

BRAVEHEART_STI

iTrader: (20)

lol im confusing myself lol

scoobydo20

does anyone no about the flywheel? because i dont acctually no the exact benifit everyone says something different? like any ideas y i am losing over 110BHP . the car is 304.2 at the flywheel but only 198.3 on the wheels?