Author Topic: RE-Furb.nl RX-4 project  (Read 8761 times)

Offline Furb

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RE-Furb.nl RX-4 project
« on: January 07, 2013, 09:36:08 AM »
Teaser...




More info soon...

Offline fil_auto

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RE-Furb.nl RX-4 project
« Reply #1 on: January 07, 2013, 03:26:38 PM »
Cool, that looks interesting :)

Offline mpk490p

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RE-Furb.nl RX-4 project
« Reply #2 on: January 07, 2013, 03:32:26 PM »
Nice, a lot of engineering gone into that ;) little BP?

Offline Furb

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RE-Furb.nl RX-4 project
« Reply #3 on: January 08, 2013, 07:15:28 AM »
Indeed..

Half bridge with smooth idle and low-speed driveability, low mileage, yet still producing well over 200rwhp

Offline Brett

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RE-Furb.nl RX-4 project
« Reply #4 on: January 08, 2013, 07:29:56 AM »
Some great work there :)

Looking forwards to seeing and hearing more! :)
At the end of the day, it\'s meant to be fun - not a political movement! :burnout
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Offline Furb

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RE-Furb.nl RX-4 project
« Reply #5 on: January 23, 2013, 09:33:14 PM »
Had some serious setbacks, found out the body wasn\'t rocksolid like i thought..
The left siderail (dont know the exact English name) turned out completely rotted after prying away some underbody coating.
But that doesnt matter for the total project, it just affects the timeframe in which it wad all planned.

As for the engine, it will be built from my S5 TII engine that came out of the car i have owned for almost 8years. I was running it with a BNR stage4 turbo, pushing out somewhere around 400hp.
The engine was rebuilt over 10years ago and still running pretty strong with about 6bar compression

Defined Autoworks has calculated some port specs for me and will complete that with a matching header. They will be cutting custom porting templates for me.
primary ports--- Intake Open- 14 degrees ATDC / Intake Closed - 65 degrees ABDC
Secondary ports--- Intake Open 110 degrees BTDC/ Intake Closed- 65 degrees ABDC
Exhaust will be their race port configuration.

The intake will be a custom built heated inlet manifold that hold dual Weber 28/36DCD carbs.
Long small diameter primary runners for low-end torque, short large secondary runners for high-end hp
the primary and secondary are not connected to eachother, so the huge amount of overlal of the bridge will not affect idle quality and low-speed driveability.
Redline will be at 8500, because of the pretty basic build and everything is calculated to this spec. Higher redline is useless on a streetcar anyway

suspension will be a full gsl-se swap so it sits a little lower, have better brakes and a slip diff.
Also more choice in wheels with the different PCD.

Pics will come shortly, gathered a lot of parts over the last few months...

Offline clive

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RE-Furb.nl RX-4 project
« Reply #6 on: January 24, 2013, 12:35:33 PM »
Sorry to hear the 929 wasn\'t as good as it looked :(, but excellent to hear of that super reliable Rotary thats brought you over here to see us again and again :chat

Keep us updated and I will see you at Rotarystock if your there
All the best Clive

Offline Furb

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RE-Furb.nl RX-4 project
« Reply #7 on: January 24, 2013, 04:11:57 PM »
Well, its not too bad considering it is a 38year old car ;)

Besides the siderails and some other small spots, the body is pretty well preserved.
It has however been fixed in the 90\'s, they welded in new rear quarters which was done right.
But the rails were patched with some pieces, which is never a good idea really...

Got lots to do, i will be re-wiring the entire car aswell..
Have had too many electrical gremlins in the FC, i never want to run into stuff like that again!

Offline Speedworks

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RE-Furb.nl RX-4 project
« Reply #8 on: January 24, 2013, 08:11:29 PM »
Furb, love the project, but just my 2 cents here.. after having ported several plates and engines, my opion on porting has changed quite a bit. If I would have to do it al over again, I would leave the primary ports alone (for low end torque and general driveability) at most a little opening up on the closing side. (and a bi of polishing in the runners.

Same thing for the secondary ports but maybe a bit more opening up on the closing side.

People may disagree with that, but in my opinion it\'s more than enoguh when you plan on using the car for the occassional drive around the church, meeting and highway pull against an ignorant Porsche :p. Except if you are draging with a huge turbo and only use the car for that, I would recommend more extreme porting.

Offline Furb

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RE-Furb.nl RX-4 project
« Reply #9 on: January 25, 2013, 06:35:46 AM »
I already thought of that, because my initial chats with defined were about a Bridgeport secondary only.
They provided me with a matching primary in case i need it.

when i started thinking about  my N/A setup, driveability was my main concern.
I had lost that a bit in the FC, so i know what not to do..

Coming from 400hp, i already knew i was not going to settle for 150rwhp
I set myself a goal of somewhere around 200rwhp, but with low speed driveability.
I did that only after i had found out about the rotary engineering DCD setup, which allows you to drive like stock in the low revs and still have the 200rwhp potential.
Low speed driving should also have about the same mileage as my 929 had from the fsctory, possibly even better.

According to defined, with port specs provided i should obtain anywhere from 210-240rwhp, depending on the tune and accuracy of the calculations for the manifold and header.
With a stock primary 200 should be within reach.

At first They tried to offer me their circuit SPEC streetport, but that would lower my torque too much so i didnt agree to that. It would have 230rwhp potential with those specs.
The new specs would offer about as much no, but lots more torque.

Offline Furb

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RE-Furb.nl RX-4 project
« Reply #10 on: May 06, 2013, 09:15:39 AM »
time for a long awaited update...
 
i havent showed you guys much yet, but this is a summary of the last few months
i
 had a RA OMP adpater on my FC, but with the use of a different front cover it didnt fit anymore
also wanted to use the 4 port OMP of the S4 N/A, for premixing in the carbs and use the stock FC oil plugs on the housings.
so i built my own adapter to make it all fit



 
the FD alt used to sit on the side in my Fc but with the use of the 12A front cover it didnt fit anymore.
made a new one and flipped the alt for easier tensioning


 
with al the different gearing i will have, the speedo will be way off, so i needed to something about it.
also needed some new gauges and wanted them in stock location.
i replaced them all with a full Smith\'s Cobra series with programmable digital speedo


 
made some injector plugs

 
had to modify the FC shifter housing to make it to fit in the 4 chassis


 
plug for the speedo cable

 
heavy duty throttle linkages



 
calculated and fabricated a throttle pulley

 
view of the engine with the engine bracket, alternator and 2stroke oil tank

 
time to remove the old


 
mounted the engine subframe

 
in with the new


 
shifter location is right on the money

 
this is where its at right now, lots more coming..  ;)

Offline clive

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RE-Furb.nl RX-4 project
« Reply #11 on: May 06, 2013, 09:34:14 AM »
Huge amount of work but going forward, well done and keep the updates coming

How is the Gen 2
All the best Clive

Offline Furb

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RE-Furb.nl RX-4 project
« Reply #12 on: May 06, 2013, 10:00:23 AM »
I guess you havent read my old thread got a while, but the FC had been parted out more then six months ago.

The engine that is going into the 929, is the FC engine.

Offline clive

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RE-Furb.nl RX-4 project
« Reply #13 on: May 06, 2013, 10:20:47 AM »
No missed it, good to see that you kept its heart to live on in another though :Thumbsup!
All the best Clive

Offline re japi

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RE-Furb.nl RX-4 project
« Reply #14 on: May 07, 2013, 04:40:43 AM »
Looking very nice. :)
Power is nothing without control. Weight is enemy of performance, handling and braking.

http://s1293.photobucket.com/user/japi_laukkanen/library/Japi?sort=3&page=1