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Thread: R8 upgrade project

  1. #751
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    Surge / pump unit heat shielded and ready to install.

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  2. #752
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    And installed.....

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  3. #753
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    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.
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  4. #754
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    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.

  5. #755
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    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

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  6. #756
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    This is another pic of it, you can clearly see the momentary needle imprints...

    That would have quickly started its demise.

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    Building a race car is easy - building a race car that can be road registered is hard.

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  7. #757
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    " 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
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    cheers,

    John

  8. #758
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    Engine is all back in.

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  9. #759
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    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
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  10. #760
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    Ta rob.

    And more fans.


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  11. #761
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    New air feeds...

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  12. #762
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    Had the infrastructure to run a meth water nozzle on the intercooler so set it up.....

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  13. #763
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    Installed a second fuel cooler....

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  14. #764
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    Sneaky place to mount the EWP. I think the Alpine stickers take a little from the Gordini originality though.

  15. #765
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    Amazing Just a question regarding the fuel cooler. Where did you get it and how much does it cool the fuel? Have a few thoughts fitting one to my car eventually.

  16. #766
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    It's just a Derale an6 connector cooler. $70 on ebay.

    I'm running it by cause the fuel gets heated as it goes through the fuel rail and it is plumbed back through the regulator to the surge tank so I just like the thought that it can try and get back to ambient temp along the way.


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  17. #767
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    Didn't think any fuel could possibly make its way past the fuel rail. #boost

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  18. #768
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    So had the insanity harness apart and added in another pwm controller for the new surge tank fuel pumps.

    And another pwm controller for the ic water pump and fans.

    Plus rewired a few channels and setup a gearbox temp sensor.

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  19. #769
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    This is the new setup in the old tank compartment.

    Uncomplicated....

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  20. #770
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    Harness for the fuel pressure and fuel temp sensor and goes down to the oil pressure and temp sensor.

    Wiring insanity is over, this is the neatened view.

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  21. #771
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    Looks pretty straight forward Brett
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    cheers,

    John

  22. #772
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    Add a temp sensor to the gearbox to go to the ecu.

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  23. #773
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    Mod up the intercooler water pipes, were being pinched.

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  24. #774
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    Roll away.....

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  25. #775
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    Rolled to fit a 7" rim!

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