Jump to content
SAU Community

Recommended Posts

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

  • Like 1

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 :)

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

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.

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

  • Like 1

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.

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

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.

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




  • Similar Content

  • Latest Posts

    • Oh yeah forgot to also mention need to also unplug the IACV as well. Thanks for the reminder @MBS206 Unplugging the TPS takes it out of closed loop so you're able to screw down the IACV without the ECU trying to add/subtract timing to maintain the idle (not sure PowerFC can even do this, but Nistune and the OEM definitely does)
    • For sale is my 1999 Nissan Skyline R34 GT-T, tuned to 234 kW / 313 hp. I've had the car for a few years as my daily driver. The car is original (as far as Skylines go), with only a few minor upgrades to enhance performance and driving experience, as typical for such a car of its age. Overall, it is in great condition with no body rust, thanks to its earlier import date. It features a top-notch security system (not literally, but it's great!) with remote start and still functional 4-wheel steering via HICAS. It comes with several performance and handling upgrades, including:     Hypergear 450HP Turbocharger running 17 PSI boost, installed mid-2021 by Jaustech     550cc injectors     Nistune ECU     Front-Mount Return-Flow Intercooler     X-Force Stainless Steel Exhaust     Upgraded engine mounts     Bottom end bearings replaced     BC Coilovers     Lenso DR1 rims     Bridgestone Potenza Adrenalin RE003 TL 245/40R18 97W tires, fitted early 2023 The interior is mostly stock, with a few additions:     Viper Satellite Tracking System with remote start     Bluetooth Double-Din Touchscreen Head Unit     Steering wheel cover Cons:     A few paint imperfections here and there     Driver’s seat shows more wear than the others. It's not torn at all, but I've added a seat cover to protect its condition. I also have a CarVX Vehicle History report available for serious buyers, so you don’t need to purchase it yourself. Price: $26,000 ONO.
    • I've had two suzukis in the past have an extremely hard time turning over and not starting after sitting for a few weeks. Ended up the alternator would seize up causing the starter to force. Same issue both times.  Maybe they're sourcing their alternators from the same place...
    • Ah right. Maybe my rb just loves chewing through batteries lol.
    • On the R34 can't you just unplug the IACV? This is the way I've always done it on the R33. Disconnect IACV, get it idling around 650rpm, and then do a power reset on the ECU to get it to relearn idle (factory ECU).   The big reason no one has touched on as to why you'd want to get the base idle right, is that it means the computer needs to make smaller adjustments to get a good idle at 700-750rpm.   Also, cleaning the IACV won't normally make the car suddenly idle lower or higher. The main issue with the IACV gumming up is that the valve sticks. This means the inputs the ECU gives, aren't translating to changes in air flow. This can cause idle choppy ness as the ECU is now needing to give a lot of input to get movement, but then it moves too far, and then has to do the same in reverse, and it can mean the ECU can't catch stalls quickly either.
×
×
  • Create New...