NC 20BPP Time Attack / Track Car - Build Thread

[toppertee]

Devcon is better than WD40!

[timk]

Danny just out of interest, what would those ports be for in the OE configuration? Better fuel economy or emissions stuff?

[orx626]

Danny just out of interest, what would those ports be for in the OE configuration? Better fuel economy or emissions stuff?

The exact opposite of what I'm building!

So you are correct Tim.

Cheers,
Danny

[orx626]

It's finally time to assemble the engine.....well at least the core.

The rotors were lightened, side clearanced and balanced to ensure the engine is vibration free all the way up to 10,000rpm.








Each of the 18 side seals were then clearanced to suit their respective grooves.






This is a rather rare item (well NLA new)...the centre stationary gear from the "Thick" plate. It has had a new bearing (also NLA) installed.








The front and rear stationary gears also scored a new bearing each and a rear main seal.




The through bolts were zinc plating.




Now this is a really neat modification....the addition of an 'O'-ring groove in the front plate where the oil pump mounts. Normally the oil pump is bolted here just as a metal to metal seal. However, as you increase the oil relief pressure the sealing surface has been known to be breached resulting in a loss of all pressure to the rest of the engine. The addition of an 'O'-ring to this mating face ensures that no oil pressure is lost at elevated oil pressure. You can that the oil pump galleries have also been ported and polished to improve oil flow.




The plates also got a lick of paint.






The oil control rings in each rotor were then installed.






Beside the rotors the only other moving part is the eccentric shaft. In 20B engines they are two piece so that the engine can be assembled. It has also been isotropically finished. More info here http://xtremerotaries.com/services/isotropic-superfinishing/isotropic-superfinishing








This is the custom front pulley that will drive the dry sump scavange pump and alternator.




The Iannetti 'Gold' apex seals and spring assemblies.






Starting at the "Thick" plate the first rotor was positioned.




Eccentric shaft in place.




Rotor housings ready to go.




First rotor housing positioned and apex seals going in.












First chamber sealed.




Second rotor in position.




Rotor housing in place.




A couple of sneaky port shots...






Apex seals fitted.




...and sealed.






Time to flip the engine over and add the last rotor housing.






Last rotor in position.






Last rotor housing in place.






Apex seals in....




....and sealed.






So that's the engine core assembled. There's still a whole lot of ancillaries that are yet to be attached.

Cheers,
Danny

[Caffeine]

Wow!

Awful! (as in full of awe, in a good way!)

[plohl]

seeing it assemble almost makes me want a rotary in my car...

[16bit]

looking forward to the noise.

[orx626]

HAPPY NEW YEAR!!!

With everything currently falling into place, 2014 will be the year to finally see the NC on a race track and hear the scream of the 20B PP at full noise!!!


So continuing on with the engine assembly....the oil pump and front counterweight assemblies were installed.






Main oil gallery 'O'-ring...things get rather expensive if you don't install in properly or there is an act of god and it fails!




Inlet and exhaust ports temporarily sealed.




Rear stationary gear and counterweight fitted.




In preparation for the dry sump to be installed.




Clutch and flywheel assembly fitted.






Dry sump and front cover bracket fitted.




Front pulley installed and bolt torqued.




All three rotor housing supplementary coolant delivery blocks installed.




Alternator on.






The engine ready to be dropped back into the chassis for the second last time....but the last time before it will finally run.






The chassis with dummy engine removed awaiting the new engine.



Cheers,
Danny

[Magpie]

It must be quite there with no customers No Charlie 91 or Magpie's car to take up your time or garage floor space

Will you do a open day to showcase this car (once you confirm it starts)?

[sailaholic]

It must be quite there with no customers No Charlie 91 or Magpie's car to take up your time or garage floor space

Lokiel's se is there getting its engine built though.


Sent from my iPhone using Tapatalk

[NMX516]

Gilmer drive

[MattR]

It amazes me how a 9 gallon keg can go so quickly

Will the oil reservoir for the dry sump be in the passenger compartment or boot? As a timeattack car you have a lot more freedom than a car built for racing.

Danny, good to see it's coming along between helping Dave as TA with the S14 cage (well that's what he told me would be happening ).

I assume we won't be able to see the finished car running at Lakeside, but it will be fine at QR????

So next project, this drivetrain in a spaceframe draped in a RX8 body for sports sedans?????

[Lokiel]

What are these "DAVE" ports?
- a custom Automotive-Plus innovation set to revolutionise the world in Rotary engineering?



What does "DAVE" stand for?

Direct Air Volumetric Efficiency?

[timk]

Pretty sure you need to have the name Dave to get a job at Automotive Plus these days. Could be Dave the eBay guy, Dave the fabricator (one of two) or Dave the engine tuner.

[Magpie]

DAVE - Dangerous And Very Expensive