Reply With Quotehardcore car porn: Adrian Neweys Aston Valkyrie finally has an engine to go into it. Cosworth 6.5L V12
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Volkswagenist
Well I completed the rebuild of the LSD with new thrust washers, Belleville(?) washers and clutch plates. The diff had come with the plates arranged as 100% locking. I'd intended on doing it that way regardless of what I found but it was good to see it arranged that way.
It wasn't until I'd gotten it apart that I realised that I didn't have the gearbox oil I intend to use on hand. After cleaning it all up I ended up using gear oil that we use in the printing presses (Castrol BM100) as an assembly oil, just light smear-idge. Will that be OK?
pics to come
Volkswagenist
hardcore car porn: Adrian Neweys Aston Valkyrie finally has an engine to go into it. Cosworth 6.5L V12
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Volkswagen Enthusiast
I had an accident .............Originally Posted by sambb
Cheers
Gary
Golf Mk7.5 R, Volvo S60 Polestar, Skyline R32GTST
Volkswagenist
I want their test bed 3cyl that made 250hp. Imagine how that'd sound - a 250hp atmo triple. I read somewhere that their lap times projections would have put the car in the top ten at Le mans this year amongst all the LMP2's, for a car that can daily drive. nuts!
Volkswagen Enthusiast
The 3 cylinder is not that bad, but really not that great either, 6,500 cc's / 4 = 1625 cc's and at 250 bhp that's 154 bhp/litre. The U2L Honda and Toyota engines we run make around 285 bhp, so 142 bhp / litre. They are production based block and head and on E85 they would pretty much pass any emissions test without a cat (except cold start and run). As a comparison the SuperTourers used to claim a bit over 300 bhp. Being a 3 cylinder I'm guessing (and the video seems to confirm it) that they had a suppressed rpm limit due to harmonics.
What really impresses me is the light weight and its ability to handle the loads from the whole rear end of the car. That's impressive.
Cheers
Gary
Golf Mk7.5 R, Volvo S60 Polestar, Skyline R32GTST
Volkswagenist
I love how he said that Newey was upset when they said the plenum had 80g of laquer on it. That's all F1 thinking but I bet the Aston people who aren't used to that were just going WTF!
Volkswagenist
450 bucks worth of new clutch discs and washers. Ouch!
removed the lid
the clutch pack stack revealed. here thrust washer and domed preload washer
Last edited by sambb; 17-12-2018 at 06:10 PM.
Volkswagenist
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The sequence of clutch plates. After the last clutch plate, the ring that has the ramps is removed, then the spline, exposing the gears. Once the gears are lifted out you can see the ring with the other sides ramps underneath - just a repeat of everything removed from the flat side of the housing
Last edited by sambb; 19-12-2018 at 08:07 PM.
Volkswagenist
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The only plate that had any kind of discernible wear on it was the plate that pushed against the ramp ring. Also a close up of the ramp profile that gives the 1.5 way action - half lock (that the clutch plates are capable of) on deceleration, 100% lock on acceleration. The plates came out and have been put back in to generate the maximum possible locking.
Id initially re assembled it with ordinary gear oil from work but then got all OCD and stripped it down again and rea assembled with the gear box oil I'll be using in the box.
So now the new ratio crown wheel and pinion, rebuilt LSD will go to the builder and we'll slap it together with a rebuild kit and some new synchros probably and then I'll be well and truly broke, unable to buy petrol and will just have to look at the box on the garage floor and wonder about how unreal it'll be until I find a suitcase of money and can buy a clutch and finish it all off! bsthurst is the aim in March but not sure if I'll make it.
Last edited by sambb; 19-12-2018 at 08:08 PM.
Volkswagen Fan
Not make Bathurst?? Blasphemy! I'm clutch shopping myself. The current big organic single has worked well, but after 2.5 years and 40,000 street and track km it has slipped badly twice when launching hard in the last couple of months. Given I have some heads here that should unlock another 80hp or so, and the box needs to come out to fix a leak, it's probably the right time to do the clutch too. Really unsure what way to go with it though, stick with a single and up the pressure with a more aggressive material, or bite the bullet and spend the cash for a twin plate and hope it lasts longer and drives nicer to offset the additional cost?
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