20v Gearbox Question

[AXNGRL]

oh ass...

was thinking of getting an lsd in it while its still na, as it will be one thing that will help it at meremere performance, but would be of even more valuable once its turbo'd... ie, was thinking what can I do to help it out as while its na, but will still be helpful once its turbo'd... hence thinking LSD.

However after reading other posts, I have come the conclusion (correct me if I'm wrong) that you wouldn't want a GTZ box in a standard 20v as its heavier & robs you of the better gear ratios... which would make my already too slow (for me) car even slower?

[Mr Revhead]

you got it pretty much right on there

stock 20vs dont really need an lsd, it can be useful but not essential.
on a prepped track itd make even less difference due to the far better grip. unless you step sideways off the clutch at 8000 with sticky tyres!

then again if your after the last 10th of a second it could help a little

[AXNGRL]

I'm going from a relatively hyperactive turbo starlet to a non turbo levin, so am wanting to do anything that will make a difference as to how quick the levin will go, without spending money on stuff that will become non existant with the turbo conversion... so if not lsd, then any other suggestions?

[Mr Revhead]

throw out the spare tyre? nos kit?

im afraid other than losing some weight theres not much you can do that will still be useful when you turbo it. if you dont want to spend money that is.

[Distrb]

wouldnt be a bad idea if you can find yourself a 6spd box with standard lsd would it? Closer ratio gears n all

on the plus side, it would be something you'd keep when going turbo..

[AceSniper]

wouldnt be a bad idea if you can find yourself a 6spd box with standard lsd would it? Closer ratio gears n all

on the plus side, it would be something you'd keep when going turbo..

c60 prolly will last just aslong as a c56 with a turbo...
And from what iv seen the 6speeds are slower on a drag

[Distrb]

c60 prolly will last just aslong as a c56 with a turbo...

thats not the point i was making. My original point was that its something you can spend money on without necessarily having to change it when going turbo, as would be the case if you did say, a cold air intake, or a new set of aftermarket headers...

And from what iv seen the 6speeds are slower on a drag

one would think thats probably got more to do with the driver and their compatibility with the vehicle than anything else

[TRDWGN]

Can anyone tell me where on the gearbox it states what model box it is? I have a (presumably) 20v box i put in my AE82 when i converted it from auto before i put it in i looked and looked and could not find a part number

[Mr Revhead]

as far as i know there is only a sticker on the box... no tag...

a c160 (6speed) would not handle a turbo very well at all. so its NOT a good idea to fit one at this stage, because youll just have to replace it when doing the conversion, or at least soon after!
also i dont feel that a turbo would benifit that much from a 6 speed, they have the power and torque to work with 5 gears

[B1NZ]

Ace sniper is right re: 6 speeds are slower on a 1/4 mile, they have the same problem as the integras where they have an extra gear in the 400m, ie the extra change where your not accelerating = slower time!

Even side by side on a track ive never had a problem with a BZ-R! i cant really see a big advantage on the extra gear apart from less revs @ 100km/h!

[Graphite]

I have a C56 -15a

same as mine

Mine says C56 - 04a

what that mean?

[Loudtoy]

Ace sniper is right re: 6 speeds are slower on a 1/4 mile, they have the same problem as the integras where they have an extra gear in the 400m, ie the extra change where your not accelerating = slower time!

Even side by side on a track ive never had a problem with a BZ-R! i cant really see a big advantage on the extra gear apart from less revs @ 100km/h!

3rd and 4th gear ratios are shorter on the 6 speeds which helps quie a bit! Imagine the better aceleration we could ge tin 4th gear if it topped out at about 165 as the 6 speeds and 130ish for 3rd! The bzr's don't need 5th whilst draging just most people don't know how to drive em!

Sorry bout highjacking your thread axn girl but the only thing i can think of doing that would be worth while on both a turbo and an na setup would be a 2 1/2 inch mandrel bent exhaust, for some reason the facelift 101 silvertops love to breath more than the others, i run open headers while racing for a proven .2 better 1/4 with 2mph top end gain

[RedMist]

Loudtoy, have you completed a "torque at the wheels" analysis?
I was surprised when I looked at my highly worked 4age NA, with little or no torque below 5.5k and a limit of about 8.2k (starts to run out of breath) the best collective torque I could manage to 170kph was with a 4 speed box. Much as the Peugot rally cars are now using.

[Loudtoy]

Loudtoy, have you completed a "torque at the wheels" analysis?
I was surprised when I looked at my highly worked 4age NA, with little or no torque below 5.5k and a limit of about 8.2k (starts to run out of breath) the best collective torque I could manage to 170kph was with a 4 speed box. Much as the Peugot rally cars are now using.

No unfortunately i'm not allowed to run my car on a dyno with open headers. Probably doesn't actually increase the torque so much as move it up the rev range! Mind you my "2 1/4 inch" exhaut has a nasty part where it reduce's size to about 1 1/4" so that could be part of it as well seeing as that small area is part of what i take off!
When i have had the car dynoed my best torque of 620nm (can't remember what the correction ratio is) was at 5.7k during a 4th gear run out to 183k or the 8.2k limit!
Would love to do it with open headers but i don't think i could find anyone with the required degree of hearing protection to do it in the small dyno area chequered flag use!

[AXNGRL]

its already got a 2 1/2" exhaust, so I guess I will just sort out the air intake, move battery to boot & then save my pennies for a turbo

Thanks heaps guys