which gearbox

[coney]

what gearbox would you put into a legnum which could handle say 800-1000hp?

cheers!

[Adam.Findlay]

The manuals are the same as evo 4-9 so any gearset for a evo 4-9 will work in the legnum boxes, but say goodbye to 10k+
and at that power level you will need to strengthen more then just the gearbox

[Nick Mann]

Aye.

Co-ordsport do assorted gearboxes and diffs for the evo, maybe worth giving them a call?

[coney]

So the evo 4-9 gearbox will cope with this sort of power without problems? cheers adam

Cheers nick i'll have a look

[Adam.Findlay]

no they wont. a dog box gearset for an evi 4-9 will though.

[coney]

The dog gearbox sounds like a supercharger lol is that straight cut gears? i'm still learning as you can probably tell!

[Adam.Findlay]

nope dog engagement and straight cut gears are two different things, although in race gearboxes they are often both used.
straight cut gears do give the distinctive whine yes
may i ask why you would need a gearbox to handle 1000+hp anyway.

[chris g]

And if you have conversations with Evo owners or check around MLR it seems clear that those gearboxes do suffer with higher power - torque plays havoc with those cogs and assorted bearings/metal bits...

[coney]

I get you now the dog is where the gears are in a different sequence, i'm just enquiring :lipseal:lipseal

[Adam.Findlay]

no gears are in the same sequence. maby you should google dog box and straight cut gears instead of getting half assed answers on here

[chris g]

Half-arsed answers...

On here...?

Surely not!

But rather strong way to comment on someone's mistake...

[Kenneth]

I think if you re-read Aaron's post, you will see he is referring to getting good answers rather than commenting on the question.

I agree that google is probably a good idea. Pictures will make things much clearer.

[Adam.Findlay]

exactly what i meant. sites like how stuff works.com have good images and explanations.
first things first it would be good to fully understand how a normal gearbox works.
then figure out what a dog engagement straight cut gearset is and the adavantages and disadvantages are.
if youplanning on making 800+ hp your going to run into a huge ammount of problems within the engine before you even start having issues with the driveline

[scott.mohekey]

if youplanning on making 800+ hp your going to run into a huge ammount of problems within the engine before you even start having issues with the driveline

Says he who eats diffs and axles for lunch.

[Adam.Findlay]

thats why i dont launch anymore and why its not rwd anymore!

[coney]

Right cheers for the info i'll have a look on google to see whats what, i think i'm getting rather confused.

[Gowf]

Well I would like to throw my 2p in here.... 800+ will become a problem with a gearbox, BUT 650-700 will be fine (within reason). I know people who run sprint cars with that sort of power and stock gearboxes and they do handle it, esp when you put in a ricardo output shaft. Now, the 'dog' is purely to do with engagement... you can get straight cut synchomeshed gears.... PPG definitely do them. If you want to go for a dog box then I can source internals for somewhere around the 4k mark (maybe a little less). Now... you will whine with straight cut gears, but again, you can have 5th helical so there is no noise when cruising, as I doubt you are ever going to stress 5th. The massive downside for dogboxes/plate diffs, is that they are not really designed with a 12000 service interval, far from it. If used in anger a dog box (and diff) should be stripped at the end of every season for inspection and rebuild. What you usually find is that you will have wear on the dog teeth and so you would change them along with the bearings (as again they do wear rather rapidly).... so carrying this out every 500miles is a bit of an arse, but then you wont be driving like you would at competition on the road.

The next stage up from this is a sequential which are significantly more expensive. They operate on a different selector fork mechanism (its a grooved cylinder) and these are far superior to you H pattern dog box (much faster changes).... These can then also be linked with a pneumatic or electromagnetic actuator which will reduce the effort for the driver on change (or allow flappy paddles). Again correctly set up with the ecu, you can have auto blip for your downshift which really does help, for at the end of the day you are trying to drive these without using a clutch. For a decent system, the gearbox alone will cost you £12.5k trade and then you still need to manufacture the fitting kit.

As for 800+ horsepower from the engine, anything is possible with the correct knowledge and a big wallet

[coney]

I understood everything crystal clear :thinking:

[miller]

Well I would like to throw my 2p in here.... 800+ will become a problem with a gearbox, BUT 650-700 will be fine (within reason). I know people who run sprint cars with that sort of power and stock gearboxes and they do handle it, esp when you put in a ricardo output shaft. Now, the 'dog' is purely to do with engagement... you can get straight cut synchomeshed gears.... PPG definitely do them. If you want to go for a dog box then I can source internals for somewhere around the 4k mark (maybe a little less). Now... you will whine with straight cut gears, but again, you can have 5th helical so there is no noise when cruising, as I doubt you are ever going to stress 5th. The massive downside for dogboxes/plate diffs, is that they are not really designed with a 12000 service interval, far from it. If used in anger a dog box (and diff) should be stripped at the end of every season for inspection and rebuild. What you usually find is that you will have wear on the dog teeth and so you would change them along with the bearings (as again they do wear rather rapidly).... so carrying this out every 500miles is a bit of an arse, but then you wont be driving like you would at competition on the road.

The next stage up from this is a sequential which are significantly more expensive. They operate on a different selector fork mechanism (its a grooved cylinder) and these are far superior to you H pattern dog box (much faster changes).... These can then also be linked with a pneumatic or electromagnetic actuator which will reduce the effort for the driver on change (or allow flappy paddles). Again correctly set up with the ecu, you can have auto blip for your downshift which really does help, for at the end of the day you are trying to drive these without using a clutch. For a decent system, the gearbox alone will cost you £12.5k trade and then you still need to manufacture the fitting kit.

As for 800+ horsepower from the engine, anything is possible with the correct knowledge and a big wallet


Can newbies please introduce themselves!

[Adam.Findlay]

you can also get a sequential shifter mechanism to shift a H pattern gearbox sequentially.
The way to go about it would be installing a evo 4-9 straight cut, dog engagement gearset inside a stock gearbox casing, then using a sequential shifter mechanism.

Gearset - http://www.ppgearbox.com.au/page.asp?productid=25
Diff Tube - http://www.ppgearbox.com.au/page.asp?productid=47|
Sequential Shifter -http://www.nengun.com/ikeya-formula/sequential-shifter

Whole gearbox here -http://maktrak.com/Evo-Sequential.htm

[coney]

miller are you talking about me?

[miller]

miller are you talking about me?

no no no...taking the mickey out of Gareth! /Banana

[coney]

oh right sorry dude lol!

[Gowf]

you can also get a sequential shifter mechanism to shift a H pattern gearbox sequentially.
The way to go about it would be installing a evo 4-9 straight cut, dog engagement gearset inside a stock gearbox casing, then using a sequential shifter mechanism.

Gearset - http://www.ppgearbox.com.au/page.asp?productid=25
Diff Tube - http://www.ppgearbox.com.au/page.asp?productid=47|
Sequential Shifter -http://www.nengun.com/ikeya-formula/sequential-shifter

Whole gearbox here -http://maktrak.com/Evo-Sequential.htm

Maktrak are run by Mr Macintosh who was chief designer at X-trak some years ago. That is the box we are currently running in the 5 although we were one of the first to run it as it was still in development. We are also running some of his custom diffs, and are a distributor for all his gear.

The ikeya shifters are good but a bit of a twat to set up and if not done correctly will impose premature wear

And Mike..... i prefer to be enigmatic now

[rcardep]

can fit a evo 6 manual gearbox in a 6a13tt? i have a automatic gearbox and i want to change and i cant find a original one.

[Nick Mann]

can fit a evo 6 manual gearbox in a 6a13tt? i have a automatic gearbox and i want to change and i cant find a original one.

http://www.clubvr4.com/forum/showthread.php?64988 Post 24 on
http://www.clubvr4.com/forum/showthread.php?64084 Post 5 & 6

[Adam.Findlay]

http://www.clubvr4.com/forum/showthread.php?64988 Post 24 on
http://www.clubvr4.com/forum/showthread.php?64084 Post 5 & 6
+1
i know one of the russian members fitted a evo 8 6 spd too only issue was one or two bellhousing bolts not lining up right. but they welded a plug on, drilled and tapped it and away they went