R8 upgrade project

Time I got the car back on the road as the gearbox all of a sudden became noisy.

Was theorizing input shaft bearing.

What a fun job, it's like the entire car is now built around that bearing.

Back off, engine out, gearbox out and stripped. Damn fith gear 32mm speedo drive open end spanner was required that needed to be thinned down on the grinder.

And yes the case hardening has disintegrated off the rollers in the bearing.



16724cbb3bd54f18145d2f034943775e.jpg
4e2f3cddee639ffea1be8c9ea12beaf4.jpg
dfd50cc68bfc68d144959fc1c1ddff75.jpg


Sent from my G8441 using Tapatalk
 
It's about time you made an appearance Brett [emoji16]
Gee, I'm completely shocked the gearbox hasn't held up.... not!
Any thoughts on a solution to keep up with the engine?

Good to see you still have the Dauph [emoji6]
 
NASA inspired heat wrapping!

Work of art Brett.

KB
 
J-man said:
It's about time you made an appearance Brett [emoji16]
Gee, I'm completely shocked the gearbox hasn't held up.... not!
Any thoughts on a solution to keep up with the engine?

Good to see you still have the Dauph [emoji6]
Click to expand...
I’m pretty sure he said he is keeping the Dauph for me
 
Last edited:
So plenty been happening.

Air to air intercooler gone. New water to air intercooler now, makes sense in a rear engine car.

New front mount intercooler radiator to go with it.

New Deatschworks 555cc matched set of injectors.

Adding a twin pump surge tank into the rear compartment. Walbro 255's.

Make a snazzy bracket to fit the unit on the rear cross member.

New engine mounts from a Nissan Micra k11 model.

Getting ready for alot more boost.




6e16bb5fef46fdd566fe1231bbf9241f.jpg
c5aabcc39228e4d298fb2e7d69816b1d.jpg
96a36b7c37febc714940914ab0af1fa1.jpg
237811397c99069eb97a0d2145cc480d.jpg
e0d21283a919579cd9b663787148e390.jpg
b9c890412f05488963735b879e1a7966.jpg
8678bdf608f7254d025058b1b6cd270f.jpg
fcbbd6235eeb3a98db1533633afd2bb5.jpg
099da5c64da62afe7bf2a879a67ef287.jpg
6a5cc786322186e81b387b13a1432637.jpg
8d149a8c84ab11abd04ba787e3a920aa.jpg


Sent from my G8441 using Tapatalk
 
And this was the input shaft bearing...
2730092958df5fb564af136890b2f44d.jpg


Sent from my G8441 using Tapatalk
 
that looks like your moneys worth alright.
 
New GFB fuel pressure regulator setup with bosch two in one fuel pressure / fuel temperature sensor.

cd65947317e321ddb25cb2b0c26bb7de.jpg
d2f305082649fc697948dc0e3c331d08.jpg


Sent from my G8441 using Tapatalk
 
Surge / pump unit heat shielded and ready to install.
668cb45d6ed370dd7d32e560a069312f.jpg


Sent from my G8441 using Tapatalk
 
OK, so more torque on the way. Would a gearbox cooler help the gearbox internals survive a little longer?. Worked for Porsche at Le Mans in the early days before they built bigger boxes.

You are probably already making the fittings and the pump is on the way.
 
Just to clarify, I know that input shaft has no signs of excessive heat, I was thinking more in terms of more volume of oil with some spray bars to direct oil to where its needed. That pitting on the input bearing shaft looks nasty.
 
Hey Chris,

When I had the Ca18det in the car I had some problems with the hydro centre release bearing, you would let go of the clutch and nothing, then all of a sudden whack. Same as side stepping the clutch.

That bearing you could actually see individual needle roller imprints in the race. Like it had them hammered in on the one place. That's obviously the main failure cause. Nothing to do with the supercharger or driving style, obviously.

Also Steve swan would be guilty as the same as the rest of us for putting in the used bearing with 100k on it already. They look and feel great.

If you've raced bikes you know that a bearing with even the slightest marks, just colour, will fail when loaded up for a while.

All the other bearings felt great but had colour. I just turned a blind eye and reassembled it!

For boost I'm going to put on a turbo and blow through the supercharger to twincharge it. It will compound boost.

Throttle body stays where it is. And I'll use the gfb boost controller and a blow off valve to limit total boost to about 22psi.

Before the new intercooler max boost on a cold day was around 12-14psi.

Engine is 8.3:1 so I think if the charge temp is under control then 22psi should be fine.

I can use a second water to air intercooler cooling on the same circuit.

The water / meth injection will help too.

Then there's the crankshaft, but I'm sure the Renault engineers forsaw twincharging on an 807 so I feel confident about that.

BR

Sent from my G8441 using Tapatalk
 
This is another pic of it, you can clearly see the momentary needle imprints...

That would have quickly started its demise.
2a4d7d353dd208b5e17b20b74890f9a1.jpg


Sent from my G8441 using Tapatalk
 
" I had some problems with the hydro centre release bearing, you would let go of the clutch and nothing, then all of a sudden whack. Same as side stepping the clutch"

Sounds like a cool launch control feature Brett :D
 
Hi Bret
You might find the roller marks relate to the number or spline teeth , this is the weakness when transmitting significant extra power.
On the UN 1 gearboxes Albuns make a single piece input shaft and cluster to upgrade the power upgrade to 400hp.
May be worth looking at for the 330 transaxle for your application
Rob Sealey
 
You must log in or register to reply here.
Top