Dooie Pop Pop
New Member
who the **** gave you a bad reputation point? your one of the few helpfull people on here lol.tro|| said:
someone remind me....how much was the NME gearcasing again???
Holinger Sequential Gearbox...
- Thread starter Rishi
- Start date
someone remind me....how much was the NME gearcasing again???
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tro||
Guest
obviously some crybaby with no sense of humour :der: :lol:Dooie Pop Pop said:
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tro||
Guest
technically you'd be down grading by fitting the engine, standard for standard the gtir is superior in many ways :fight2:ashills said:
Rishi
Still waiting on some shims!
Dooie Pop Pop said:
The Magnesium NISMO Casing was quoted at £65k...
I'm going to stick with the Quaife... Its not really been broken by anyone yet... its just the casing and i'm having a brace made up when the person making it gets some time... lol
Simmo... If you are aiming at 600Nm (422lb.ft) then you will be fine with the standard casing and a single plate paddle clutch...
It comes down to how the energy is released... If you use road tyres drop the pressures and launch you will find that the you will spin the wheels before the input shaft excerts enough pressure on the casing to break it (point of failure)
Now use some A048 or R888... Because of the extra grip more engergy is needed before the wheels will spin and so this means that the pressure excerted (load build up) by the input shaft is greater as it takes more energy before the wheels spin or the car actually moves and thus naturally releasing the energy... In short energy build up in the box is past the point of failure for the casing...
So we need to find a way to increase the tolerance of the casing...
- One way to do this is a simple brace... 00sid has proven this to an extent on his car...
- Something else to consider is to reduce the preload on the inputshaft slightly when building the box up...
- Another solution is to use straight cut 1st and 2nd gears which would stop the input shaft being forced through the casing under heavy loads...
There is no point looking at EVO boxes and heading down that route when we haven't even let the gearbox brace prove itself... And so far its doing a pretty good job...
Hope that helps people have a real understanding to the problem...
Rishi
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maz
New Member
nicely explained rishi. how much is it for your standard casing these days? because if thats the only problem then id get the straight cut 1st and 2nd, get the case braced and when the time comes for the case to break, (hopefull after several months of road driving and the odd track day) then i would just replace it again. if it wasnt too much $$
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tro||
Guest
the whole problem is with the cut of the helical gears and the shit design of the casing, si's box currently has a leak which he's hoping is the seals but may not be, it may be broke at the secondary shaft bearing at the bell housing end, its happened before, the brace may have sorted the casing blowing apart but something has to give, he wont know until its off...lets hope it hasn't cracked into the bellhousing
straight cut gears are the way to go imho, whether synchro or not. You have no loadings along the shaft, thus no stress on the case, we will see very soon whether its solves the problem with the case or not.
i hope it does, as transmission probems are what holds the gtir back, theres enough people around now with the money or dedication to stick with the car and see it do it well so sorting the box would be the key to the car doing really well
straight cut gears are the way to go imho, whether synchro or not. You have no loadings along the shaft, thus no stress on the case, we will see very soon whether its solves the problem with the case or not.
i hope it does, as transmission probems are what holds the gtir back, theres enough people around now with the money or dedication to stick with the car and see it do it well so sorting the box would be the key to the car doing really well
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tro||
Guest
straight cut synchro it will just be the noise, imagine driving around in reverse gear all day.maz said:
dogbox is the wear on the dog rings, do you want to rebuild your £3k gearbox in 25000 miles ?
dogbox is not worth the hassle on the road, for the strip or track the time saved is worth its weight in gold
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Agreed, 1/2 dog straight cut 1st and 2nd gear with the rest helical would be livable day to day or a full synchro box with straight cut 1st and 2nd gear being the best option for street use.RishiGTiR said:
Jack knight or quaife maybe able to make up a new straight cut 1st/2nd gear to work with the original quaife gear kit for a half reasonable price?
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tro||
Guest
doh....:doh: :lol:Fast Guy said:250 000 miles:shock: I'd never have to rebuild it again at that rate
