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S A U - N S W Autumn Tech Event Saturday 2nd May 10am

DekA

By DekA,
in Events Archive

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MrStabby Grand Master

MrStabby

Posted
Posted

Good notes Adam!

Definitely one of the biggest themes of the day was how the driveline is designed with shock absorbing capability, and changing this with stiffer components can lead to damage if the whole system isn't appropriately matched.

Yeah i reckon its something like this below - area under the curve is the same, but peak load/force is much lower with a soft (sprung) clutch. Engineering 101.

114937-largest_asphalt_545.jpg

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MrStabby
MrStabby

Notes! Please post any corrections/additions. (FWIW I was the guy in the Exodus T shirt, Black 32 GTR with R34 wheels). Clutches with solid centers should not be used as they put a lot more strain on

Calsonic14U
Calsonic14U

Scored 2 free HALTECH jumpers at the last tech night, will see what the wife and i can swipe this time hahahaha

XKLABA
XKLABA

Mine !!! My race just got cancelled due to weather so I get to do this

Redline_GTR Veteran

Redline_GTR

Posted
Posted

Cheers guys for another great tech arvo.

Thanks to Award, Terry and Trish :)

Learnt some new things and got in some laughs as well.

Thanks Adam for the notes as well!
Will be looking forward to the next one :)

WAGON_BOY Mentor

WAGON_BOY

Posted
Posted

Was a damn shame I missed this, with both sleeping in and my calendar reminder not set properly I got the reminder 10 min's before the event :(

"Solid mounting of diff cradles also increases rigidity in a way that's detrimental (for the gearbox? or drive train more generally?), so make especially sure you use a sprung center clutch if you have a solidly mounted diff cradle."

This is good to know as I've just fitted a diff craddle and will be putting in the g'box brace in soon too, guess with the brass button clutch this is going to destroy my gearbox prematurely. :) JOY hahaa

ianjb Grand Master

ianjb

Posted
Posted

oh, and lol.. not sure how many people found out in the day, but it turns out Terry and Trish live 2 doors down from me. It didn't click until we went outside for the ridiculously big spread they put on and i saw their car.

all in all, i think i learnt more from this tech session than any of the others.... thanks to all involved in organizing and putting the day on.

XKLABA Grand Master

XKLABA

Posted
Posted

shift sedately and you will be fine, so no time attack shifts for you just yet!

I'm sure you'll find it's not so much how you shift the box as it is how you reengage the clutch that destroys boxes, this will apply to both going up AND down gears, should be done just like a motorbike, find friction point then release clutch not find floor then release clutch

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32GTRB Proficient

32GTRB

Posted
Posted

The other bit I got out of the day (more informative than anything) is that the only major difference between the series 3 BCNR33 boxes and other 32/33 boxes is that the syncros are "pad-type" rather than held in by circlips and also have a stronger (bigger) 5th gear synchro making them the design of choice if you have the option.

He also recommended that cleaning the gearbox can be done by running ATF in it for a while. Could be useful for those wanting to move away from smurfsblood which is nearly impossible to remove.

It was also interesting that Terry mentioned there is not a major difference in the various LSDs out there however for big power/time attack cars he did seem to recommend the Cusco up front. Seems he can also modify the standard ones making it potentially a cheaper option.

WAGON_BOY Mentor

WAGON_BOY

Posted
Posted

I'm sure you'll find it's not so much how you shift the box as it is how you reengage the clutch that destroys boxes, this will apply to both going up AND down gears, should be done just like a motorbike, find friction point then release clutch not find floor then release clutch

brass button clutch what friction point ?? HAHA

MrStabby Grand Master

MrStabby

Posted
Posted

It was also interesting that Terry mentioned there is not a major difference in the various LSDs out there however for big power/time attack cars he did seem to recommend the Cusco up front. Seems he can also modify the standard ones making it potentially a cheaper option.

Yeah i think we was saying that like gearboxes, which are pretty much all the same in how they work, the factory, Nismo, Cusco etc LSDs are also pretty much the same. He can setup the rear to be tighter, however, since the after market ones are larger/beefier they will last longer.

WAGON_BOY Mentor

WAGON_BOY

Posted
Posted

I destroyed 5 brass buttons in 2 years due to the torque and everyone of them had a friction point

The distance between off and on was very very small though

no worries I have no torque HAHA

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