340 gearbox options.

Post by **lil mike** » 04 Jul 2006 11:38 am

as you all know i am hoping to build a R5 powered 340, i am wondering what options i would have in the gearbox department, as i have been told that constand sharp starts and drifts dont do it any good, reason for changing G/box is that the propshaft will be changed for stronger one and theres no point leaving the standard G/box on it, as wont be stock power...any help as always would be greatly appriciated...
cheers
lil mike

Post by **Chris_C** » 04 Jul 2006 11:45 am

I don't think theres going to be too many problems with the box, there's a couple of guys running 350bhp through what I think are still the stock ones, and again as far as I last heard, Iains 400 turbo'd 300 is on the standard box with modded prop, and he's pushing 220ish now I think?

Iif you really really want to, some of the crazy fins and swedes are looking at porsche 928 drivetrains as well as a few others that have been mentioned.

Have a nosey on 300power, theres a fair bit of mad stuff over there, so always worth looking at the pictures and hope babelfish can do some translating!

Post by MJ » 04 Jul 2006 04:01 pm

The 340 (5speed) and 360 gearbox are the same, no?

Post by **petefarrell360** » 04 Jul 2006 04:36 pm

Ah yes the gearboxes are the same I believe, it's the final drive that differs the 360 carb and injection cars had different ratios believe it or not! I can't quote what they were without doing some digging, but Foggy is one of the men in the know.
Pete

Post by **jtbo** » 04 Jul 2006 05:27 pm

Well, 1,7 and 360 injection has same diff 3,64:1 from memory, carb version of 360 has 3,36:1.

Post by **petefarrell360** » 04 Jul 2006 06:28 pm

brad360 wrote:My 1986 Volvo 340/360 owner's manual tells me, p 101:

Reduction ratio, final drive

5 speed 1.4 litre models 3.82:1
4 speed 1.4 litre and GLT 3.64:1
1.7 litre models and GLE 3.45:1
2 litre* carb models 3.27:1
*(2 litre low octane models 3.64:1)

The gearbox ratios are the same for all configurations, except some havea 5th. No mention of diesel.

Knew I'd seen it on here somewhere, not that it was the exact answer to the question from the first post!
Pete

Post by **jtbo** » 04 Jul 2006 06:42 pm

1986 manual is then different than 1988 manual as mine 1988 manual says(page 105): 1,7l and 2l inj. to have same 3,64:1
5 speed 1,4l model 3,82:1 only models that were sold in France has 3,45:1 and that 3,27:1 was only found in 1985 model in here.

Different market area different gadgeds

I don't think we had specially different octane versions at all in here either.

Can't understand why they just make a car and sell it to all as it is, every country tries to be special, selfish and foolish

Post by **jtbo** » 04 Jul 2006 06:50 pm

For stronger gearbox I think that there is not much to do, maybe fit Alfa 75 driveline?

M47RII is almost same as in 240, there is no really lot stronger options easily available. Don't know if it would be possible to fit internals of M46 and if it is any use at all, it may not be that much stronger.

It is not horsepower that destroys box, but torque some has rumoured that 250nm is max at constant usage, but I'm not quite sure about that, anyway your gearbox is not new, taking it apart and rebuilding would provide perhaps best solution as your car is probably going to stay light as possible?

Differential will be anyway weaker than gearbox, of course welding should help there, but still it is quite weak.

Post by **Chris_C** » 04 Jul 2006 08:26 pm

Jani's right, the later 1.7's I think had the 3.64 (well, Fake definately has) not sure if it was a time related change, or country related though

Post by **bennett** » 07 Jul 2006 01:26 pm

the standard drive train will take the power of the r5 turbo.
i am now (as i type) fitting a 1800cc 16v reno 19 engine in to my 340, just have the wiring to do. i will be leaving the running gear stock as it has impressed me with all the drifting abuse the car has had with the stock 1700cc lump.

Post by **lil mike** » 09 Jul 2006 07:10 pm

well then that got me no where...

what would welding up the diff do to the everyday handling??? obviously it would drift reasonably well and parking is a bitch but what else???
cheers
lil mike

Post by **Fuse** » 09 Jul 2006 07:35 pm

jtbo wrote:For stronger gearbox I think that there is not much to do, maybe fit Alfa 75 driveline?

M47RII is almost same as in 240, there is no really lot stronger options easily available. Don't know if it would be possible to fit internals of M46 and if it is any use at all, it may not be that much stronger.

Well there's one way if you want to keep M4x series box..

You can get strengthened versions of M4x boxes from SSF-Pyörä Finland but those are NOT cheap.. But those would take much more power than stock box as those are mainly built for rally and rally cross use.

http://www.ssf-pyora.fi/

Post by **bennett** » 10 Jul 2006 01:25 pm

lil mike wrote:well then that got me no where...

what would welding up the diff do to the everyday handling??? obviously it would drift reasonably well and parking is a bitch but what else???
cheers
lil mike

you dont really notice the welded diff when at normal driving speed, you only have to watch it in the wet when taking sweeping corners at speed.
thanks
lee

Post by **lil mike** » 10 Jul 2006 05:24 pm

so the way the 340 differential wheres out when drifting it should really be welded...if thats what its gonna be used for???
just wondering as i dont want extra cost...

Post by **jtbo** » 11 Jul 2006 12:41 pm

Fuse wrote:
jtbo wrote:For stronger gearbox I think that there is not much to do, maybe fit Alfa 75 driveline?

M47RII is almost same as in 240, there is no really lot stronger options easily available. Don't know if it would be possible to fit internals of M46 and if it is any use at all, it may not be that much stronger.
Well there's one way if you want to keep M4x series box.. You can get strengthened versions of M4x boxes from SSF-Pyörä Finland but those are NOT cheap.. But those would take much more power than stock box as those are mainly built for rally and rally cross use.

http://www.ssf-pyora.fi/

If I remember correctly price was near 2000€, obviously that route is far out of reach from averagel Volvo 300-series driver