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26B PP Eunos Cosmo
Hi my name is James and thought i might share the build of my 4 rotor powered Eunos Cosmo. Ever since i saw and heard Mad Mikes Rx7 at a D1NZ event a few years ago i just had to build my own. I started the build earlier this year. The car is a 1991 Eunos Cosmo Type E. I purchased the car as a rolling body, which was originally a 20b. Its only got 68000kms on it and the body is really straight.
First thing was to strip the interior, must have removed about 50kgs of wiring and computers. I have done a manual transmission conversion using a FC master cylinder and Rx8 clutch pedal. I have included some pictures of the car. The engine is a Peripheral port based on FC plates, housings and rotors. i will be adding more details on the engine the next few days. https://cimg6.ibsrv.net/gimg/www.rx7...d6092d0823.jpg How the car used to look https://cimg0.ibsrv.net/gimg/www.rx7...bb981f4ae2.jpg https://cimg6.ibsrv.net/gimg/www.rx7...4a56af69d3.jpg https://cimg6.ibsrv.net/gimg/www.rx7...12f7651292.jpg Surge tank install, 2x 044s https://cimg0.ibsrv.net/gimg/www.rx7...b77d7ba4cd.jpg FC booster and master https://cimg3.ibsrv.net/gimg/www.rx7...618fc3448d.jpg https://cimg6.ibsrv.net/gimg/www.rx7...d8e17b4773.jpg Teaser https://cimg4.ibsrv.net/gimg/www.rx7...4fc6ed1ac2.jpg Turbo from my Rx7, destroyed at track yesterday haha. |
now all you need is two EFR 9180s
.. sequentially. |
Yessssss baby jesus, this will be amazing.
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What are you planning on doing with the car? Sounds awesome, can't wait to see it finished.
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Originally Posted by lastphaseofthis
(Post 12123835)
now all you need is two EFR 9180s
.. sequentially.
Originally Posted by KKMpunkrock2011
(Post 12124161)
What are you planning on doing with the car? Sounds awesome, can't wait to see it finished.
So specs on the engine are as follows: Series 4 and 5 centre and end plates Series 5 rotor housings Peripheral ported Series 5 rotors (9.7:1) Precsion Engineering eccentric shaft Rx8 Stationary Gears NRS Apex seals and springs Peterson 4 stage dry sump pump Efi Hardware individual throttle bodys Link ECU. Most of the work has been done by me apart from the e shaft, centre plate stat gear mods and balancing. Attached are some images of peripheral porting the housings. The timing is based on MFR timing. https://cimg6.ibsrv.net/gimg/www.rx7...32c38cb0f8.jpg Practise housing, took hours to set up in the mill. https://cimg4.ibsrv.net/gimg/www.rx7...345565073a.jpg https://cimg2.ibsrv.net/gimg/www.rx7...f84980815e.jpg Turned out all right apart from having to use a sledge hammer to get the insert pressed in. Some adjustment needed in the tolerances haha. https://cimg8.ibsrv.net/gimg/www.rx7...334303cb30.jpg https://cimg9.ibsrv.net/gimg/www.rx7...f547fce98f.jpg Holes cut in 4 brand new housings. https://cimg9.ibsrv.net/gimg/www.rx7...1c61648885.jpg Inserts started out looking like this https://cimg2.ibsrv.net/gimg/www.rx7...575b3af00f.jpg Then this https://cimg7.ibsrv.net/gimg/www.rx7...5e211db246.jpg Then this, ready to be pressed in. All the machining has been done with a maual mill and lathe with no digital readout, so takes bloody ages. https://cimg0.ibsrv.net/gimg/www.rx7...f6d2fab0fa.jpg Inserts pressed in, heated the housings in the oven and froze the inserts using a 50/50 mix of methylated spirits and dry ice. Surface areas sand blasted for a good surface for the devcon to stick to. https://cimg4.ibsrv.net/gimg/www.rx7...5c2fa4c2f0.jpg https://cimg8.ibsrv.net/gimg/www.rx7...b48931e4e3.jpg Finished product all polished up. |
Mean bro. Where abouts in NZ are you? I miss all the dope rotors back home aye haha
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nice.
Where are you getting the eshaft? And do you have a goal in mind on when you want to have the engine running? |
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Originally Posted by JSmall
(Post 12124716)
Mean bro. Where abouts in NZ are you? I miss all the dope rotors back home aye haha
Originally Posted by Johnny Kommavongsa
(Post 12124727)
nice.
Where are you getting the eshaft? And do you have a goal in mind on when you want to have the engine running? |
Purchased some bits. A couple of centre plates, 1 front plate and 4 rotors. The rotors are FC n/a which are 9.7:1 compression, really hard to get hold of second hand in NZ which why they are new. Not much modification required on the plates, just fill the intake ports and make up some blanks.
https://cimg2.ibsrv.net/gimg/www.rx7...c7ce85666e.jpg https://cimg5.ibsrv.net/gimg/www.rx7...96836dd37f.jpg https://cimg1.ibsrv.net/gimg/www.rx7...b46daeb84d.jpg Intakes filled https://cimg2.ibsrv.net/gimg/www.rx7...58a1e80ce6.jpg Few simple blanks made up https://cimg5.ibsrv.net/gimg/www.rx7...5ba27da3c7.jpg https://cimg0.ibsrv.net/gimg/www.rx7...324ac19611.jpg Eccentric shaft turned up, just need to fit oil jets and get it balanced. https://cimg5.ibsrv.net/gimg/www.rx7...539e1e4259.jpg This is the alternator i will be using. Its a 140amp from a LS1 Holden Commodore. Scored it for $120 and gave it a tidy up. https://cimg9.ibsrv.net/gimg/www.rx7...8ccd344f01.jpg Decided not to half arse the oil system. On the left is a S5 oil pump. On the right is a 4 stage R4 Peterson oil pump. Should provide plenty of pressure and flow at 10000 rpm. |
Nice, getting a serious collection of parts together there. Keep up the good work.
Darryl |
Made up a few bits. An alternator bracket, oil pump bracket and drive mandrel. Since i am on gearbox number 4 in my Rx7, i decided to use a Tex Racing 4 speed dog box on the 4 rotor. I imported it from North Carolina a few months ago, worked out cheaper than a tremec and should be a lot stronger. I will use an FC bellhousing and make an adapter. Also made an engine assembly stand. Going to use a car jack to set the e shaft height to get the centre plate on.
https://cimg8.ibsrv.net/gimg/www.rx7...f8bb17d3fc.jpg https://cimg0.ibsrv.net/gimg/www.rx7...0668524bb0.jpg https://cimg2.ibsrv.net/gimg/www.rx7...dc1f6f33a3.jpg https://cimg5.ibsrv.net/gimg/www.rx7...92b73be6a5.jpg https://cimg6.ibsrv.net/gimg/www.rx7...51ad6d2c85.jpg https://cimg9.ibsrv.net/gimg/www.rx7...62b7370b6c.jpg https://cimg1.ibsrv.net/gimg/www.rx7...a2b942b994.jpg Diy powdercoated, more details on this in my next post. https://cimg7.ibsrv.net/gimg/www.rx7...57ddd48f04.jpg https://cimg5.ibsrv.net/gimg/www.rx7...f6190c6687.jpg https://cimg9.ibsrv.net/gimg/www.rx7...cd5293dc53.jpg The gearbox is a Tex Racing T101 which has a magnesium case so it weighs about the same as a factory rx7 gearbox https://cimg0.ibsrv.net/gimg/www.rx7...edea4cbfd4.jpg https://cimg6.ibsrv.net/gimg/www.rx7...b04c446812.jpg |
Nice is that an engine stacking table?
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Nice work! I like where this is going!
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Originally Posted by Johnny Kommavongsa
(Post 12126643)
Nice is that an engine stacking table?
Most of the accessory parts on the engine are going to be polished or powder coated, thought i might show you guys how i do the powder coating. Its a cheap Chicago Pneumatic rig but it works really well. https://cimg6.ibsrv.net/gimg/www.rx7...d0a40ce99a.jpg 1st step is to sandblast the parts. https://cimg8.ibsrv.net/gimg/www.rx7...78b0ac1363.jpg Next step is to clean the parts. I use methylated spirits. https://cimg1.ibsrv.net/gimg/www.rx7...f7590883a9.jpg Wired up so each bolt is grounded. https://cimg3.ibsrv.net/gimg/www.rx7...0a1764960f.jpg Next step is to spray the parts, bit difficult to take a photo while spraying. https://cimg4.ibsrv.net/gimg/www.rx7...0efc8cef78.jpg Parts are then cooked for 10mins at 200°c. https://cimg5.ibsrv.net/gimg/www.rx7...8315fbc930.jpg Finished https://cimg6.ibsrv.net/gimg/www.rx7...8070c0c526.jpg https://cimg7.ibsrv.net/gimg/www.rx7...9df44a1bb3.jpg Did the CAS aswell https://cimg8.ibsrv.net/gimg/www.rx7...2360e8d3f4.jpg The coating is durable enough to coat fastners with. https://cimg4.ibsrv.net/gimg/www.rx7...f7fad585b3.jpg NRS apex seals 1 piece 2mm x 12 |
bloody hell this is nice
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<subscribing>
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Wicked build mate! Looking forward to this!
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i would ditch the CAS if i were you, you really don't need your timing wandering on something you put this much money into.
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Originally Posted by RotaryEvolution
(Post 12127397)
i would ditch the CAS if i were you, you really don't need your timing wandering on something you put this much money into.
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you will be fine on an n/a then, i just would never put a turbo(s) on it with the CAS, 4 rotors with all of them bouncing around would be fairly bad compared to a simple 2 rotor which usually manages to get by(somewhat, though still not ideal).
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https://cimg5.ibsrv.net/gimg/www.rx7...3f57500487.jpg
Painted the plates with this stuff. Seems a lot tougher than other spray paints i've used. https://cimg9.ibsrv.net/gimg/www.rx7...7ac9817e00.jpg https://cimg6.ibsrv.net/gimg/www.rx7...baad64a584.jpg |
https://cimg6.ibsrv.net/gimg/www.rx7...17161cee58.jpg
Rotor housings all cleaned up waiting for assembly https://cimg9.ibsrv.net/gimg/www.rx7...824573c19b.jpg Seals and springs https://cimg4.ibsrv.net/gimg/www.rx7...2527354dc2.jpg Got the rotating assembly balanced and rotors side clearanced, thanks to Grant at Rotorsport Racing & Engine Balancing. https://cimg9.ibsrv.net/gimg/www.rx7...6b77f1ab8c.jpg Machining the out oil groove in the rotor bearings. https://cimg8.ibsrv.net/gimg/www.rx7...3c7f505e63.jpg Clearancing side seals. Set up this jig on the drill press using a scrap rotor. The grinding wheel is for a dremel. Used the fastest speed on the drill and it worked really well. Only messed up 1 side seal out of 24 which isn't to bad.<br/> |
Following
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https://cimg2.ibsrv.net/gimg/www.rx7...f7260da5e5.jpg
All seals clearanced ready to be fitted to the rotors https://cimg3.ibsrv.net/gimg/www.rx7...d6983b86cf.jpg https://cimg5.ibsrv.net/gimg/www.rx7...6aa3853e37.jpg https://cimg7.ibsrv.net/gimg/www.rx7...1980f4bba3.jpg Its nice working with brand new parts. https://cimg0.ibsrv.net/gimg/www.rx7...f6900e9049.jpg All seals fitted, ready for assembly. |
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