yup ken hit the nail on the head.
straight cut gears are cheaper to make, hence why they use them for reverse gear. however, as ken said, theye whine like buggery hence why they dont use them in the forward gears
yup ken hit the nail on the head.
straight cut gears are cheaper to make, hence why they use them for reverse gear. however, as ken said, theye whine like buggery hence why they dont use them in the forward gears
Righto so what gearset would you recomend to use evo 4,5,6,7,8,9 ?
now you are going to open a can or worms, Kenneth will tell you the one he prefers, that being a shorter 5th as he likes to drive with the car in a higher rev range than some others, I personally would have the longer 1st and longer 5th, where as Brad may like something entirely different, then there is the fact that there are different gearsets in each range as well.
The ones with the longer 5th are the EVO 7 and 8 with the 5 speed, non RS. The RS ones have really really short gears.
All other EVO 4-9 5 speeds have a 5th that is equal to our 5th or shorter. The 1st + 2nd gears are longer on ALL EVO gear sets and on some of them 3rd + 4th are the same, on others 3rd + 4th are a bit shorter.
So....what are you after exactly?
wtf set did I get then Brad? Because I have the longer evo 2nd, but some other sort of 1st gear... Did any of the Evos actually come with straight cut 1st as standard?
You have an RS gearset. My 1st is 2.928, your 1st is 2.785.
So if I go with a TRE 3.73 Final drive all should be pretty good then ?
Last edited by Wodjno; 09-07-2009 at 07:33 AM.
That's the optimum solution in my head. But after swapping a couple of emails with them I can't seem to get a price for shipping the bits we need over here!Originally Posted by WODJNO
Good luck with that....
Damn gear ratios!! ahh id like a longer 1st and 2nd as im finding I have to change up just that bit too soon on the track I use, But also a longer 5th would be wicked just for cruizing around town and open road driving, just any opinions from anyone who has done it would be wicked, things such as pros and cons from each diffrent set of ratios. Of course the best of both worlds would be great but I can see shorter ratios hindering me when i manage to afford more horsepower.
I'm the only one with the longer 5th so far.
Thats cool, does it make it much better at 100kph?
It is about 200rpm lower at 100kmh, so a bit quieter and potentially better on fuel.
I have had both sets in my car.
I prefer the maximum length 1st, longer second and standard 5th.
A couple of hundred RPM on the motorway isn't a lot. The reduction in acceleration is likely to have you using more fuel as you load up the accelerator more to change speeds. It is change in load which uses fuel.
Also, when getting in excess of 160kph, that ratio difference was much more noticeable in terms of slower acceleration.
As such, I won't be entertaining the idea of a longer 5th until the car is capable of exceeding the speed of standard. (i.e. on track and on the back straight hitting the rev limiter in 5th)
We'd all agree that there isn't much point in going above 6000rpm for maximum performance in a VR-4. With the stock 5th this is 232kmh and with the longer 5th this is 245kmh. You'd change out of 4th at 170-180kmh, and from that change point to 230kmh the shorter 5th would definitely accelerate harder, but from 230kmh the longer 5th would be better.
I agree it isn't worth going much past 6000 to shift. The issue though is that you don't shift from 5th! Since 4th is the same ratio, you then actually have to hold 4th longer to fall into the same peak power area.
It's arguable whether the acceleration cost earlier in the gear is worth staying in the peak HP area that little bit longer.
Not only that, how often do you get to those speeds? On track for how many seconds?
You would really need to test it on 2 equivalent cars to find out any real world differences. I reckon in the end it just comes down to preference.
Ok so I've read a few different threads about swapping in an evo gear set and I'm a bit lost. Is it possible to simply change the 5th gear to a 0.721 giving 100km/h at 2500rpm? Or is there additional things needed if there is a problem with the output gear, crown whee, shaftl?
Changing my clutch soon and thinking I'll try doing this if its simple enough.
Daily driver / circuit car / drag car / show car / weekend cruiser / project car
Yeah, you can change just the 5th gear ratio. Though if you are going to the trouble you might as well service the gearbox.
I think the main issue is that you will need to remove the bearings and then press off the R and 5th gears. It is a fairly simple job with the right tools, but a pain without.
Last edited by Kenneth; 28-01-2013 at 09:29 PM.
Ok thanks Kenneth, helpful as ever! If I can find one I'll probably get it done but since I have stuff all tools it might end up being someone elses job to do haha. I was thinking of changing over the full set of gears but now Im thinking just the 5th gear will be easier to find / cheaper.
With the full set did you need to swap over all the evo gears onto the vr4 shaft to overcome this problem? http://www.clubvr4.com/forum/showthr...t=evo+gear+set
Yep, you just need to swap everything on the output shaft.
You only need to do that if you want the 1st and 2nd ratios though, as they are cut into the input shaft.
Is anybody know where to look here in UK for spare second hand internals/parts of evo gbox??
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