what gearbox for 400+ bhp?
09 June 2007, 07:24 PM
#3
Scooby Regular
Thread Starter
Join Date: Apr 2007
Location: blackpool
Posts: 218
Likes: 0
Received 0 Likes
on
0 Posts
cheers, im after info on whats the best route to getting my car suitable for 400+ bhp
i no bolting a load of stuff on under the bonnet and playing with the chip can get me there
but i want to be able the stop and send it round a corner
i no bolting a load of stuff on under the bonnet and playing with the chip can get me there
but i want to be able the stop and send it round a corner
09 June 2007, 07:43 PM
#6
Scooby Regular
iTrader: (3)
Join Date: Aug 2000
Location: 1600cc's of twin scroll fun :)
Posts: 25,565
Likes: 0
Received 2 Likes
on
2 Posts
Your best off with a 6 speed unit and rear diff, they are stronger than the 5 speed (though the selectors on the UK cars can be iffy except the 02 ones which are meant to have brass selectors rather than plastic ones).
You will also need a rear diff, cost about 2k for both.
Tony
You will also need a rear diff, cost about 2k for both.
Tony
09 June 2007, 07:44 PM
#7
Scooby Regular
Join Date: May 2006
Posts: 134
Likes: 0
Received 0 Likes
on
0 Posts
TBH mate, i would stretch to a 6 speed i destroyed my 5 speed with 300bhp and 425ft lb of torque (2.5 conversion) but a 6 bolt 5 speed (99-00) would be up to the job for a while at least.
Trending Topics
09 June 2007, 07:49 PM
#8
Scooby Regular
Thread Starter
Join Date: Apr 2007
Location: blackpool
Posts: 218
Likes: 0
Received 0 Likes
on
0 Posts
i mean i need to get the brakes, suspension etc sorted before i go and nearly double the bhp of my car, plus i want to make sure the rest of the car can handle the power, clutch gearbox etc
so i was asking whats the best route to start at
there is no point in being fast in a straight line if you need to slam on 5 seconds before the corner because the brakes cant slow me down in time!
so i was asking whats the best route to start at
there is no point in being fast in a straight line if you need to slam on 5 seconds before the corner because the brakes cant slow me down in time!
09 June 2007, 08:12 PM
#9
Scooby Regular
iTrader: (6)
Join Date: Oct 2004
Location: Aberdeenshire
Posts: 1,944
Likes: 0
Received 0 Likes
on
0 Posts
Think you said it all there Andy. Its all down to personal preference i reckon. You can do a bit of each at a time to complement the other or sort out the brakes/sus completely 1st, then box, then the worlds your oyster with the engine......
09 June 2007, 09:18 PM
#10
Scooby Regular
10 June 2007, 06:43 PM
#19
Former Sponsor
iTrader: (20)
Join Date: Oct 2006
Location: 8.95 @ 168mph. Zero to 1KM 194.1mph
Posts: 1,150
Likes: 0
Received 0 Likes
on
0 Posts
It's "torque" that will break gears, which is why 2.0lt cars with "400bhp +", often get away with , because they still have relatively low torque.
Chriso2.5's example is good, 300bhp, but 425ftlbs.
Andy,
400bhp "+", just how much is the "+" ?
Mark.
Chriso2.5's example is good, 300bhp, but 425ftlbs.
Andy,
400bhp "+", just how much is the "+" ?
Mark.
10 June 2007, 09:27 PM
#20
They cant really, as on a 2ltr you are normally looking a +/- 10% square power/torque figures. (so 400bhp would be: 400bhp/360-440Ibs)
As Mark says torque (as a force) is the killer to a box.
That is not to say that some people have not run ver5/6 boxes with more than 350ibs going through them, but it is probably down to the mechanical sympathy they have for their car. (As well as the way the power comes in and the waer in the box itself).
12 June 2007, 10:37 AM
#21
Scooby Regular
Join Date: May 2007
Posts: 829
Likes: 0
Received 0 Likes
on
0 Posts
My gearbox gave up at 350lbs ft so cut out the middle man and went for PPG which can take some big power , now running at 420+bhp/450lbs ft all day long and PPG just 
at you 
if you got cash go for it 
at you if you got cash go for it
12 June 2007, 03:14 PM
#22
Scooby Regular
Join Date: Nov 2004
Location: In a 405 BHP/360 ft/lb P1 with SN superstar Sonic dog at my side!
Posts: 1,959
Likes: 0
Received 0 Likes
on
0 Posts
I have been running 405 bhp / 360 ft lb through a P1 (Sti5) box now for 2 years without any problems at all.
I have done a few track days, but i don't do Johnny boy traffic light burn up's on the road, although i do drive it quite hard i suppose.
If you want to be sure of reliability, i would go with a 6 speeder or a 5 speed PPG kit though.
I have done a few track days, but i don't do Johnny boy traffic light burn up's on the road, although i do drive it quite hard i suppose.
If you want to be sure of reliability, i would go with a 6 speeder or a 5 speed PPG kit though.
Thread
Thread Starter
Forum
Replies
Last Post