how much lbft of torque or bhp can a vt box take

12th November 2006, 11:23

as above what sort of bhp can you run befor you start going through loads of boxes. a saxo running about 320 bhp is it going to make alot of difference having a quaif put in the dif

12th November 2006, 11:43

your be rebuilding you box every 1000 miles with 320bhp. Unless you get a heavly modded box. Im talking like £1600 quids worth at least.

12th November 2006, 11:46

http://www.quaife.co.uk/

12th November 2006, 11:54

sorry mate will re phrase it a 240 bhp saxo that will be running nos so do you think the box would hold out as it would only be running gas every now and again

12th November 2006, 12:42

If your going to being running that HP through the front wheels at a grippy dragstrip, your going to be breaking things.

If you have a spare £3k, go for straight cut gears, drops, central oil pickup and a ATB Diff.

12th November 2006, 13:07

the casing is the weakest point in the MA box iirc, it starts flexing and causes bearings to pop. straight cut gears and an ATB diff would be a good starting point for an upgrade although changing the diff on an MA box is a c*nt. might be better off trying to find anyone selling a BE3 conversion (or at least the bellhousing and shafts) second hand as although it still isnt the ultimate answer it takes more power/torque then the MA and the diff is 4 bolts to change.

12th November 2006, 13:43

Quote:

your be rebuilding you box every 1000 miles with 320bhp. Unless you get a heavly modded box. Im talking like £1600 quids worth at least.

what do you base that on, personal experience?

straight cut gears aren`t quite the simple answer it may seem as there are only two very short straight cut gearsets on the market for the ma boxes(circa 2k for a ready to roll box ex diff),

for your situation even a standard box would suffice, obviously uprating the diff and clutch you`ll have a box easily capable of coping with the n2o.

12th November 2006, 16:03

[QUOTE=vtsturbo;753608]what do you base that on, personal experience?
QUOTE]

Not my experiance, but my best mate (however, he did all the work himself as hes a motorsport mechanic).
And i was talking about the 320bhp like 1st said.

But as said. 220 horses should be ok threw a standard C2vtr box. With a heavy clutch. and would be nice with a light flywheel.

12th November 2006, 16:23

would of thought that lightening the fly wheel might make traction even worse. so a vtr box with quaif dif should be ok to handle the power. just want to try and get it right the first time with buying 5 boxs first

13th November 2006, 19:29

if one does blow don`t quote me but yes,lol.

how are you controling the n2o supply or aren`t you going to bother?

14th November 2006, 12:43

i ran 230bhp thru my VTS box, no problems! uprated clutch, uprated clutch arm n thats it!

14th November 2006, 19:21

i ran 230bhp thru my VTS box, no problems! uprated clutch, uprated clutch arm n thats it!

how many miles, any launches & if so how many, lowered at all?

the clutch arm was "uprated" because of the twin ap aswell i`m guessing

15th November 2006, 11:51

Box was on about 80k i believe, launches: yes generally quite a lot! Lowered 40mm on GMC Springs n billy shocks.

Uprated arm due to helix yes!

15th November 2006, 12:01

the diff is 4 bolts to change.

you need to strip the gearbox to get the diff out. a lot more than 4 bolts.

15th November 2006, 13:46

Quote:

Originally Posted by williamsvts

the diff is 4 bolts to change.

you need to strip the gearbox to get the diff out. a lot more than 4 bolts.

yeah thanks for that.... i'm talking about once you've stripped the box funnily enough, the be3 diff is far easier to change than the MA one.

15th November 2006, 16:13

there is no bolts hold it in once its stripped. it will just left out.