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Thread: R8 upgrade project

  1. #451
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    Moving to flywheel.

    Will lighten a bit, so drew it up which makes it easy in the cnc mill.


    Pistons arrived, some nice forged 77mm 8.6 to 1 teflon skirted ones. 21mm gudgeons to match the rods.




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    The whole set is within 0.1 grams.


    Still waiting on more parts....

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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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  2. #452
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    With a belt now you can see the path.

    Basically 180 degrees or more on all driven pulleys.


    And alternator rear bracket detail.


    And all new primaries arrived.





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

    For any custom fabrication call Precision One Off Engineering - Sydney 02 4587 8666

  3. #453
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    I like the new extractors already..

  4. #454
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    Head work continues.

    New enlarged seats in and ports taken out around the valve seats ready for valve seat cutting then final smoothing.


    New guides. Intakes chamfered to let the oil run off.


    Inlets all port matched to the manifolds.


    Exhaust ports taken right out to match the new 1 7/8 primaries.


    After the valves are done a truing skim and then set chamber volumes to 43.45cc should give me 8.6 to 1 with my pistons.

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

    For any custom fabrication call Precision One Off Engineering - Sydney 02 4587 8666

  5. #455
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    Bit of block work today. Milled down the mounts around the oil filter.



    So I can start fab the supercharger rear bracket.


    The bracket has to be quite substantial to stop the supercharger ripping the front of the case off.

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

    For any custom fabrication call Precision One Off Engineering - Sydney 02 4587 8666

  6. #456
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    Christmas day mock-up.

    Looking at intercooler etc spacing. Will be running an R11 etc after market intercooler.



    And mock with head and carb bodies etc.


    Still santa loads to do.....

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  7. #457
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    Back on block prep.


    Middle cam bearing oil gals are 8.7mm.

    End are 6mm.

    So run an m10 tap through for some stainless m10 grub screws then drill them out to 6mm.




    Loctited in ofcourse and the top bit of the thread peened a little so they can't escape back up.


    Then make a 6mm alu end plate as I will cut the cam short.
    Note there should be a ground area to promote the cam bearing oil to run off around and through into the rear oil drain area.


    Then prep the block for paint. The liner seats are like new on this block.


    Then paint.








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

    For any custom fabrication call Precision One Off Engineering - Sydney 02 4587 8666

  8. #458
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    Slow day today as I was made to do household chores.

    But I fitted in a fresh coat of paint in the engine bay.


    And after 2 sessions in the dishwasher the modified timing cover was ready for paint.




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

    For any custom fabrication call Precision One Off Engineering - Sydney 02 4587 8666

  9. #459
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    The two sessions at the dishwasher, was that for dishes? Or car parts?
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  10. #460
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    Loving the attention to detail here!

    Just wondering if there is anything special with the paint for the aluminium motor surfaces?
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  11. #461
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    Does it wash anything but car parts?

    And it's just straight engine enamel, no prep apart from cleaning.

    Not much progress yesterday, just cut the rear supercharger bracket to shape and tacked it up.


    Then went back to the fuel rail. Started with some 5mm stainless and fab up to attach to the bottom studs of the carbs then use the angle grinder with a cut off blade and cut about 2/3rds through to put the bend line mark.


    Then fit and jig up and tack.


    Will finalise today.



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

    For any custom fabrication call Precision One Off Engineering - Sydney 02 4587 8666

  12. #462
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    First was fabricate and weld today.

    Welded the supercharger outlet housing boost pipe and linished it to flow nice.


    Then welded up the other cut off.


    Finalised the fuel rail with an6 fittings.


    Them made a stainless rubber grommet bracket for the intercooler.


    Then made the other side top mount and welded on.


    Then weld up the bypass pipe.


    Then make the plenum end caps and entry pipe and weld up the plenum.


    Then onto the head.

    So I want to add another oil drain / cam lobe oil feed hole above where the fuel pump lobe is.

    So set-up to drill at the same angle as the others, I drill a 10 as final all the way through and relieve the bottom at 14mm same as the other main drains.


    But this cuts through the oil pressure feed to the mechanical fuel pump. So it's drilled at 4mm from factory so I drill to 4.2mm and then tap to M5.



    Then loctite a M5 grub screw in, but before I do that I turn the bag upside down accidentally and they go everywhere.

    And same as last time peen the thread so it can't escape.

    So the head should drain better plus no need to leave the mechanical fuel pump drive rod in.


    So a little more progress today but still not complete, certainly not from a lack of trying....
    Last edited by brettr; 2nd January 2017 at 11:24 PM.
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    For any custom fabrication call Precision One Off Engineering - Sydney 02 4587 8666

  13. #463
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    New custom spec camshaft arrived from Cat Cams in Belgium.

    Looks the go made from a new billet, comes with distributor / oil drive mesh piece.




    More on the way....

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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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  14. #464
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    New custom spec camshaft arrived from Cat Cams in Belgium.

    Looks the go made from a new billet, comes with distributor / oil drive mesh piece.




    More on the way....

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    BR

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

    For any custom fabrication call Precision One Off Engineering - Sydney 02 4587 8666

  15. #465
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    Finalised the engine mount. Cut to shape and mig'd up.


    Modded the engine mount for extra clearance at the rear near the charger.


    Unpicked the rear supercharger bracket and rear located and mig'd to final. Need to clean it up.


    Will clean paint all before final assembly.



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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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  16. #466
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    Trying to get some stuff accomplished while I've got a few days off work.

    So finalised plenum build with bypass pipe.




    Added these extra bits on the end to mount dual air filters.


    Linished all to "nice" inside.




    Reassembled the throttle body to open opposite to the way God made it and custom mounted the Nissan tps.


    Widened the throttle body mouth to flow properly as it had a huge step at the mouth. Using a 60mm throttle body on this one.



    Made and welded up a remote joining mouth on the other side.


    Today's cooking ingredients a R53 mini supercharger bypass valve. Made a mounting plate and mount the pipes..



    And mock-up for fit shows detail of the bypass valve system I've made.




    Make a mounting plate for the intercooler for the idle air control valve, needs to be on the outlet side. Room on the plate for a one way brake vacuum pick-up valve and also a boost nipple.


    Mark and drill the parcel shelf and mount the intercooler.


    Drill and tap the head for M12x1.5 for a Nissan temp sensor.






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    Last edited by brettr; 3rd January 2017 at 10:05 PM.
    BR

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    For any custom fabrication call Precision One Off Engineering - Sydney 02 4587 8666

  17. #467
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    Bracket made and throttle body mounted.


    Iac valve and brake vacuum pick-up done.



    New stainless intercooler spray bar coming together as well.



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

    For any custom fabrication call Precision One Off Engineering - Sydney 02 4587 8666

  18. #468
    1000+ Posts J-man's Avatar
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    This combo is appearing to turn out less complex than the back seat hair dryer Nissault job. Easy for me to say watching you whip up these mods in the click of a mouse
    cheers,

    John

  19. #469
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    Nice new avatar, J-man.
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    JohnW

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  20. #470
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    Quote Originally Posted by JohnW View Post
    Nice new avatar, J-man.
    Thanks John, they say you've got to have a goal
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    cheers,

    John

  21. #471
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    Possibly easier, yes, alot of infrastructure is being reused as such.

    Finished the spray bar. Welded some aluminium stays on the intercooler for the spray bar.


    And then a mount clearance check.


    Added a piece to the throttle body mount for the throttle linkage.


    Gave the plenum a buff.


    Hole out the bypass plate system.


    Started engine mount and ancillary mount spray painting.


    Now going to clock up the oil pump on the block to make the spacer plate.


    All these things take time, just can't seem to ever get enough done....

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

    For any custom fabrication call Precision One Off Engineering - Sydney 02 4587 8666

  22. #472
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    So impressive, your workmanship. Shed's a bit small though... Thanks for all these great photos.
    JohnW

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    Renault R8 1965
    Renault Scenic 2005 (wife's)
    Renault Scenic 2007 (mine)
    Peugeot 306 XT 1995 (daughter's)
    CitroŽn CX Pallas 1980

    National Co-ordinator, Renault 4CV Register of Australia

  23. #473
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    I think documenting it makes it easier for me to see that something is being done John!

    So before clocking up the block I've linished the supercharger delivery housing for a little more clearance. That's final now.


    Then shaped the throttle body bracket and drilled for the linkage mount, thats final now.


    Then onto the block/oil pump spacer.


    So first cut the head off an M7 then put it in the lathe and turned the shoulder down to true it and make it 6mm.

    Then start on the rotor hole and then move to each bolt hole using the M7 and using the probe in the mill. Just moving in one plane to get the hole centres which are recorded in machine absolutes.



    Then draw it.


    Then realise it.


    Probably enough for one day...

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    BR

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

    For any custom fabrication call Precision One Off Engineering - Sydney 02 4587 8666

  24. #474
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    Brett, take this as a compliment, but you are just on a different planet!!
    Angelo

  25. #475
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    Hey Angelo, ta mate.

    So cylinder head day today as engine is nearing readiness for assembly.


    Fully ported with new enlarged seats and big valves, chambers smoothed, seats cut on the newgen.


    With 10 thou off the head I settled on 45cc combustion chambers.


    Can someone tell me what my static compression is???? I'm reckoning 8.5 to 1 but what would I know...






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

    For any custom fabrication call Precision One Off Engineering - Sydney 02 4587 8666

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