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reccomend me a gear box plz
hi all I have just started to do speed hillclimbs after sundays run my uk 5 sp has died 1.5miles from home ,
I need a 5sp to take my 400+bhp I cant fit 6sp as I will change class any ideas please |
my uk box broke too , i replaced it with a ty752vbaaa close ratio in my opinion a very nice gearbox i dono if it will take that much power or get a ppg'd close ratio
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Your looking at one of the Ra box's then. Later ones v5/6 are known for being stronger.
I know David at api does a few things to make them stronger. |
No 'standard 5 speed will cope with 400 hp, even when they were new, Now after 10 or 12 years it is too much to hope. It will be false economy to try to ' uprate it ' it cannot have enough effect to overcome weak gears.
A forged set from either Albins or PPG or any of the forged gear types is your only cloice. Avoid Elite or Quaife in my opinion. I know the 6 speed problem you face as we have one or two customers that run in that class and they are all in the same boat. We van offer an unbreakable dog box kit to sell, but unless you have an all out racer it will not be any good for a road car. David APi |
Originally Posted by APIDavid
(Post 11170473)
No 'standard 5 speed will cope with 400 hp, even when they were new, Now after 10 or 12 years it is too much to hope. It will be false economy to try to ' uprate it ' it cannot have enough effect to overcome weak gears.
What about the haweye 5spds? Thought they were a lot stronger than the classic 5 speeds? A forged set from either Albins or PPG or any of the forged gear types is your only cloice. Avoid Elite or Quaife in my opinion. I know the 6 speed problem you face as we have one or two customers that run in that class and they are all in the same boat. We van offer an unbreakable dog box kit to sell, but unless you have an all out racer it will not be any good for a road car. David APi |
Originally Posted by veerinder9
(Post 11170482)
What about the 5 spd from the hawkeye? I thought these were stronger than the classic 5 speeds? Due to the 2.5's torque??
No 'standard 5 speed will cope with 400 hp, even when they were new |
Originally Posted by APIDavid
(Post 11170489)
No 'standard 5 speed will cope with 400 hp, even when they were new
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is there anything to stop him using a jdm 6speed and having 6th gear removed ?? as the 1st 5 gears are the same as early ra 5 speed
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Originally Posted by veerinder9
(Post 11170491)
Hmm whats the max the 6 speed can handle? And how much heavier is it than the 5 spd?
Synchro will not be a strong feature up there, but gear strength is as good as anything. I am led to believe that you cannot use a 5 speed gear set in a 6 speed case for that formula, but that is third hand, however the advisor of that has bought a 6 speed type car so that he can run 6 speed, which seems unnecessary cost if he could have got around it by another means. David |
Originally Posted by APIDavid
(Post 11170514)
They are heavy by about double the weight of a 5 speed. We have had them running in cars up to high 500 hp's and I know others have too.
Synchro will not be a strong feature up there, but gear strength is as good as anything. I am led to believe that you cannot use a 5 speed gear set in a 6 speed case for that formula, but that is third hand, however the advisor of that has bought a 6 speed type car so that he can run 6 speed, which seems unnecessary cost if he could have got around it by another means. David How much does the 5 apeed actually weigh roughly? |
Originally Posted by veerinder9
(Post 11170521)
How much does the 5 apeed actually weigh roughly?
40 - 45 Kg's for a 5 speed & about double for the 6 speed. |
Originally Posted by APIDavid
(Post 11170489)
No 'standard 5 speed will cope with 400 hp, even when they were new
hmmm, what about a hawkeye wrx box? |
Tidge mate, :brickwall read the red writing - Durr.
:rolleyes: |
Originally Posted by madscoob
(Post 11170498)
is there anything to stop him using a jdm 6speed and having 6th gear removed ?? as the 1st 5 gears are the same as early ra 5 speed
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surely the 5 spd would cope with 400 from the hawk if used as a daily drive, but in a hill climb i wouldn't be too sure alot of abuse to be taken
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Martyn J ran a 5sp hawk box in his 580hp impreza for more than a few race days and drag days! It won't last for ever but it is a lot stronger! And the ratios are the best you can get
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Originally Posted by APIDavid
(Post 11170585)
Tidge mate, :brickwall read the red writing - Durr.
:rolleyes: I realise what you put lol, but, im running 400+ on a hawkeye 5 speeder, 5000 miles done so far with no issues. also know 3 cars runnign 450+ on them ;) there road cars, not race cars i should add though |
Originally Posted by madscoob
(Post 11170587)
does anyone know if this is possible '?
David PS Tidgy, I know where you're coming from, but in terms of power capability the 5 speed is way out of its league above about 380- 400 hp and whilst l also know of many folks who are ' getting away with it ' professionally l cannot recommend a 5 speed standard type box for that job. power level as it will not do it. |
Originally Posted by APIDavid
(Post 11170779)
If he is in the class that I am aware of, then effectively, gears and internals are free - sequential is not allowed - the original gear cases for the car model must be used.
David PS Tidgy, I know where you're coming from, but in terms of power capability the 5 speed is way out of its league above about 380- 400 hp and whilst l also know of many folks who are ' getting away with it ' professionally l cannot recommend a 5 speed standard type box for that job. power level as it will not do it. tbh i do have plans to change mine, prob custom 6 speed, but thats cos the 5th isnt long eough for motorway cruising i dont think/ |
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