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School me on EA81 DUAL-CARB engines


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39 replies to this topic

#26 Loyale 2.7 Turbo

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Posted 11 December 2012 - 11:37 PM

Found a Photo of a Subaru FF-1 "Sports" :)

Posted Image



#27 el_freddo

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Posted 11 December 2012 - 11:45 PM

Found a Photo of a Subaru FF-1 "Sports" :)

Posted Image


What a beast! I think I just fell in love with another subaru :brow:

Interesting thread. Shame there's not more of these engines kicking around.

Cheers

Bennie

#28 phantomD

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Posted 21 December 2012 - 06:10 AM

Can somebody tell me whether the Y-pipe for these engines is the same as for any of the other engine models around that era? I have an EA81S just about out of rebuild but I don't have the correct Y-pipe.

I'll probably have to get one made but I thought I'd ask around first - thanks in advance.

#29 hatchsub

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Posted 21 December 2012 - 06:38 AM

Nah unfortunately the Y for the dual carb engine was different. The normal y-pipe "should" bolt right up however but you will be leaving a bit of power on the table. If you can spring for it and find a good exhaust shop, you can get a nice Stainless y pipe bent up for your car. I had one made for my former coupe along with a full Stainless exhaust.

#30 1000 Pistes

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Posted 28 March 2014 - 11:39 AM

Factory Twin Carb Subaru EA Engines were available on both the EA71 (1600) and EA81 (1800), Both engines were defined by a following "S" at the end on their engine codes. This was Subaru's way of calling it the Sports model. The engines were a completely different design to the standard models. The "S" models had Dual Ports and Opposite Valve configuration, which means different cams and rocker gear.

They were available in Japan in the Subaru Leone GSR and in the later RX Models. These engines has Higher Compression Ratio and had ~10% more power output. They were used heavily in the late 70s and early 80s Rally cars.






 

WorthlessWithoutPics.gif


Do you Mean like This?
(this is an EA71):

100_4119.jpg


100_4121.jpg


I've seen such conversions, even done to EJ engines:

2104061330094569859S425x425Q85.jpg


Usually done for VolksWagens

IMG_0895-1.jpg






Yes!





Yes, it is this:

e.jpg


safari-1.jpg


safari-2.jpg


And this are Photos of the Car on the 1983 Safari Rally Race:

Safari1.jpg


safari-4.jpg


safari-3.jpg


safariengine.jpg



When Subaru Developed that Head-Mounted Twin downdraft Weber Carb EA81 engine with Reversed Valves, they already had the Turbo EFi Technology, so very Few of those were made, since Subaru started to sell the "Turbo Traction" Models in the same 1983 year...


subaru_1983_turbo_brat.jpg


TurboTraction.jpg


But very Few Twin Weber Carb Models were Available for Sale, mainly in Japan and New Zealand,

like This one, which was for sale some months ago:



Portapapeles01-7.jpg


I'll Love to Own one of those Later Twin Carb RX!

Kind Regards.

Hello mate,

Would you,please,to pass me photos(and other infos) from the EA engines with twin carbs,mainly WEBER?

I have in mind to make an EA71 engine with twin carbs,for rally use.

Any other advice concerning special parts for more power is welcomed.



#31 Loyale 2.7 Turbo

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Posted 28 March 2014 - 03:23 PM

Sorry for the Photos not being viewable, but that only happens the last week of each month, as I reach very Quickly the Monthly Bandwidth assigned to my Decade old "Free Account" as I Explained here:

 

~► http://www.ultimates...e-hosting-woes/

 

Also there I explained a way to bypass that limit... So, you can either wait for the monthly bandwidth assignment to be resetted, or use this:

 

~► http://3.hidemyass.c...nZS0y&f=norefer

 

I hope this works for you,

Kind Regards.



#32 coxy

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Posted 29 March 2014 - 07:45 PM

The biggest difference with the Dual carby heads is the reversal of the inlet and outlet valves (on the true Dual carb heads) do yours have 2 inch or bigger exhaust ports? and a visible separator on the inlet port making 2 D's

as for available information all I can give is that I owned one of these motors for a few years. sadly I sold the car as I moved country (wish I never had now) And when I came back to Australia the car had vanished along with the motor :(

Inlet and outlet clearances are the same, not sure if you will need solid or hydraulic lifters, mine had solid.

Mine was mated to a 3.9 ratio straight cut 4 speed dual range box (came with the motor) and I was able to tune it to get between 95-100 km/h out of second gear.

Timing was set at 8 degrees any less and the motor ran like a chaff cutter, any more and it pinged its little head off.

they are a fantastic motor and will rev way higher than the normal EA81.

you will be amazed :)

TOONGA

Mine seem to be original RX as a complete engine with carbs manifold and even Air filter assembly but the divider is actually in the exhaust ports not the intake, The valves are reversed etc so I do not think there would be two versions of this engine Should take some photos and upload them as I have the heads off at the moment.



#33 Loyale 2.7 Turbo

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Posted 29 March 2014 - 08:02 PM

Yes, post photos please!



#34 coxy

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Posted 29 March 2014 - 08:05 PM

Will take some today and figure out how to upload them on the site.



#35 Loyale 2.7 Turbo

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Posted 29 March 2014 - 08:15 PM

You can upload them to a photo hosting website, such like Photobucket, Facebook, etc... then once you view the photo there, do a right click over the photo and copy its URL address, then come to do a post here, you'll see in the Tools of the post window, a small green square, under the A and the :) ... hit it, a dialog box will appear, then erase the http:// that the dialog box has, and paste the the copied URL address of the Photo.

 

That will display the photo here.

 

Kind Regards.



#36 Tom0

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Posted 29 March 2014 - 09:31 PM

http://www.trademe.c...n-693950113.htm Dual carb rx for sale over here, all those motorsport goodies wrapped up in a road going rx. With a slight price tag



#37 1000 Pistes

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Posted 30 March 2014 - 03:24 AM

This car in NZ has the EA71 engine?

I would like to know the way I could mount the twin WEBERs on the heads.

These heads are special heads or could modyfying some original heads to do it?



#38 Loyale 2.7 Turbo

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Posted 30 March 2014 - 11:58 AM

Nope, the 1983 Subaru RX had a Special Version of the EA81S with limited edition Twin Weber Carbs, Subaru stopped the production of these because they already were selling the Turbo EFi EA81 (1983), that Twin Weber Carb setup were used only at the Safari Rally, at New Zealand and very few were sold to the public.

 

 

665318_464228950289805_1741320724_o.jpg

 

Kind Regards.


Edited by Loyale 2.7 Turbo, 30 March 2014 - 11:59 AM.


#39 Loyale 2.7 Turbo

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Posted 30 March 2014 - 12:04 PM

This car in NZ has the EA71 engine?

 

The Twin Carb EA71S could be found on certain Models,

 

but it was Developed on the Subaru Manatee RaceCar.

 

 

This is the Gen 2, Subaru Manatee:

 

374156_450153618364005_1881599933_n.jpg

 

 

14270_450153798363987_1350106932_n.jpg

 

 

This is the Gen 1 Subaru Manatee:

 

150580_450153315030702_1218617847_n.jpg
 



#40 Loyale 2.7 Turbo

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Posted 30 March 2014 - 12:09 PM

All these info, and Much, Much more could be found

 

at the Legendary "Strange & Weird Subaru Stuff" Thread.

 

~► http://www.ultimates...d-subaru-stuff/

 

Kind Regards.






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