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I'm curious if it's worth swapping the os giken close gear as a performance improvement mod ? Could it help make the car feel more responsive ? Most people talk about it as a upgrade after breaking the gearbox oem. I'm more curious about the performance mod of this close gear set. Who tried it back and forth? what is your thought on how it drive ?

I have one and looks like I busted it on Tuesday.

If its a road car YOU MUST HAVE a decent curve otherwise the car will be a nugget. With a nice flat "torquey" curve, it's a great thing.

I swapped between OS and standard numorios times until OS was smashed beyond repair. With stroker and single turbo, once underway it's awesome. But getting off the line in a hurry can be all or nothing due to long first. I did like it tho, you definately notice the difference.

I swapped between OS and standard numorios times until OS was smashed beyond repair. With stroker and single turbo, once underway it's awesome. But getting off the line in a hurry can be all or nothing due to long first. I did like it tho, you definately notice the difference.

What did you do after the OS was busted?

Yeah Joey just put the box in last week and all seems good. Will give it proper test this Thursday ( rally sprint). Not sure what to report unless it breaks.

So Piggaz I'm trying a standard gearset cryoed with billet centre plate. If that fails, not sure what I'll do?

Yeah Joey just put the box in last week and all seems good. Will give it proper test this Thursday ( rally sprint). Not sure what to report unless it breaks.

So Piggaz I'm trying a standard gearset cryoed with billet centre plate. If that fails, not sure what I'll do?

I Guess theres no real way to know unless it does break lol, how much power is getting put through this transmission?

what clutch and tyre set up is being used?

thanks

About 600rwhp, semi slicks at the track and a gearbox munching OS Giken R3C triple plate. Which I hope to replace with Nismo copper mix before it takes this box out. Altho I looked at it the other day whilst box was out and after about 40k kms, hundreds of launches and half dozen gearboxes it doesn't look like wearing out any time soon.

About 600rwhp, semi slicks at the track and a gearbox munching OS Giken R3C triple plate. Which I hope to replace with Nismo copper mix before it takes this box out. Altho I looked at it the other day whilst box was out and after about 40k kms, hundreds of launches and half dozen gearboxes it doesn't look like wearing out any time soon.

good to know, this is approximately the power ill be making and im also using a copper mix... will be very interesting to see how this goes

I was having a think about this lately as my second gearbox is rattling around a bit. I was thinking going shorter diff gears and maybe seeing if I could keep the stock 1-4 gears and going a longer 5th for cruising. Also triple plate clutches or high clamping force singles smash boxes so a nismo or the new organic twin plates seem to be more forgiving.

Maybe an option to consider rather than a close ratio gearbox.

That R3C thing is one hardcore clutch.

The Nismo will an awesome "upgrade" and definitely help with boxes staying together.

so hardcore it left impressions on the input shaft.

I'll get a picture with both plates to show how much flex has been taken out of the system.

I was having a think about this lately as my second gearbox is rattling around a bit. I was thinking going shorter diff gears and maybe seeing if I could keep the stock 1-4 gears and going a longer 5th for cruising. Also triple plate clutches or high clamping force singles smash boxes so a nismo or the new organic twin plates seem to be more forgiving.

Maybe an option to consider rather than a close ratio gearbox.

That would make 1st crazy short

That would make 1st crazy short

Yeah but I think the op is wanting response, so I assume he is talking about 2nd to 4th gear more than anything. And it would help keep the -5 on song especially in the tight stuff where you can't grab 1 but would like to.

i could be thinking about this all wrong.. but wouldn't that just shorten all the gears by the same amount and not actually make the gap between gears closer, therefore not making a closer ratio ?

Edited by tricstar

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