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Gnarlyjibs
04-19-2014, 04:23 PM
Hey everybody new to the forums. Just purchased a 1980 Celica GT.

Looking to see if anyone has a repair manual for this vehicle.

Also looking to find information on the forums about producing a little more power from the 20r engine that came in this car.

Thanks everyone and have a good weekend.

Lonestag
04-19-2014, 05:33 PM
Hello and Welcome!

The best manuals are the Big Green Books (BGB) which are the factory repair manuals. They are super detailed, specific, and very well written.
You might be able to get them new, but I usually just use Ebay or Amazon (http://www.ebay.com/itm/1980-Toyota-Celica-Factory-Service-Workshop-Shop-Repair-Manual-Book-/370721195708?pt=Motors_Manuals_Literature&hash=item5650b486bc&vxp=mtr ) <--- I know that one is red.

My oldest engine is a 5MGE in my 84 Supra so I don't know too much about the R series motors but I know there is at least a few things that can be done to your 20R and it would probably be fairly simple to swap tot he 22R (don't quote me there!) and there is definitely a lot of aftermarket support for those.

Being a Carbureted motor, I would think that a good carb and maybe a header might be some easy ways to add just a little pep to the motor. Being that old, I'm sure a tune up couldn't hurt either.

This site is skewed a little bit towered the later Celica's because there are simply many more still on the road but there are at least a couple of people who know a whole lot about your car, still an excellent resource for any of your questions in my opinion.

Also, GET US SOME PICS OF YOUR CAR, OH DEAR GOODNESS DO WE LOVE PICTURES HERE AND WE ARE GOING TO BUG THE CRAP OUT OF YOU UNTIL YOU GET US SOME, YOU SHOULD PROBABLY JUST GO DO THAT RIGHT NOW, NO, I MEAN STOP READING AND GET US SOME PICS, IF YOU HAVE REACHED THIS SECTIONS OF THIS RUN ON SENTANCE ALL IN CAPS IT MEANS THAT YOU AREN"T OUTSIDE GETTING US PICTURES, WHAT IS WRONG WTH YOU MAN!?!?!?!?

Ok, but if you have a couple of pictures, please share, we really do enjoy them...

Oh, and here are some links for a carb and header. Do get some advice from a person who has worked on a 2nd gen like yours though.

http://www.ebay.com/itm/OBX-Racing-Exhaust-Header-75-80-81-Toyota-Celica-2-2L-20R-/151281452527?pt=Motors_Car_Truck_Parts_Accessories&hash=item233913c5ef&vxp=mtr

http://www.ebay.com/itm/GENUINE-WEBER-32-36-DGV-M-CHOKE-CARB-CARBURETOR-KIT-TOYOTA-PICKUP-K746M-WK746M-/131145176630?pt=Motors_Car_Truck_Parts_Accessories&fits=Year%3A1980%7CModel%3ACelica&hash=item1e88dc9636&vxp=mtr

Murgatroy
04-19-2014, 11:18 PM
To be honest, we have all of the generations represented here EXCEPT the 2nd Gen.

If nothing else, I have the Chilton's and The Haynes so I can look up anything you need.

The best I can tell you though would be to speak with Facime, he has the most experience with the the 20R that I can think of on the board.

Facime
04-20-2014, 01:16 AM
Hey, welcome to the board.

My personal obsession with the celica began in high school in 1980 with my first 1976 GT coupe. Ive been a fan ever since.

Ive rebuilt several 20/22R's, most recently in a 75 coupe:

https://scontent-a-sea.xx.fbcdn.net/hphotos-ash2/t1.0-9/24934_103119683060758_5437860_n.jpg


If your 80 is bone stock there is quite a bit you can do to get more power out of it. Its all down to how much you want to spend. Is your car exempt from DEQ up there in PDX?

If not worried about DEQ issues, there are a rediculous number of options available for modding the 20R. You can buy an adapter plate to mount a 22R carb on your 20R manifold. The stock Aisin carb on the 22R is almost double the CFM of the 20. Weber carbs are plentiful as well and most people chose the 32/36 progressive carb as a good street carb. (a progressive carb has a primary and a secondary) Both of those options work fine on an otherwise stock motor. My personal opinion is you can go with the stock exhaust still at that point.

The next stage up from there would be a carb, cam and exhaust bolted on an otherwise stock motor. Mild upgrades would be a 32/36, an "RV" cam, and a standard long tube header. For a little more street performance you could go up to something like a Weber 38 outlaw (a true 2bbl, both butterflies act together) and a "street performance" cam. Either of those options, will work ok with an otherwise stock motor. The 20R head will flow that kind of setup just fine.

The sky is the limit beyond that. Dual side draft setups, head porting, high compression pistons, hybrid designs (20R head on a 22R block), even turbos and superchargers are available. If you want to just droool over available parts check out LC Engineering (http://www.lcengineering.com/)


The stock trans in the 80 is a W50 and perfectly capable of handling just about anything you can throw at it (that is streetable at least). The brakes and suspension are, however, woefully inadaquate. I will admit that when it comes to brakes and suspension on the second gen, I cant be of much help with whats available for mods. For the first gen we found that AE86 parts were adaptable and since there is good aftermarket support for them, upgrades were plentiful. I would be willing to bet that the same holds true to some extent for the 2nd gen.



DISCLAIMER: As with all older cars, the first thing to do before making ANY mods is to make sure the car is safe and can handle any proposed changes. This means a complete inspection of bushings, fluids, bearings, brake lines, suspension parts, rust in the frame rails, cooling system efficiency, safety equipment, etc...Making any mods for performance before fully bringing an old car up to maintenance standards is foolish and short-sighted.



Other business: There are several toyota owners groups in your area that have regular events if you are interested in such things. Check out PSTOC (https://www.facebook.com/PSTOC), OTOC (https://www.facebook.com/OREGONTOYOTAS), and TSNW (http://www.toyotasyndicatenw.com/FORUM/index.php?sid=5298d19ef59eb1002446f3e4e3c5b618).

Let me know if I can be of any further help.

crymson
04-20-2014, 02:23 AM
Hey welcome to the Forums! Great too see some more Portland people.

Gnarlyjibs
04-20-2014, 05:05 PM
Thank you everyone for the welcoming replies. I'm working on getting Internet set up at my house currently. Should be installed this Thursday. Once that's up and running pictures will follow.

A friend and I have been going through the car and trying to get it running a little better. It is not firing all cylinders all of the time. The car was sitting since before 2008. Previous owner claims 77k original miles. And judging by the shape of the car and engine it seems like he may be telling the truth.

Stuff we have done already.
New plugs and wires
Valve cover gasket and checked and set the gap on the valves.
New motor and Trans mounts
New brakes to go on it Monday.
We will soon be Piping the exhaust to the end of the car. Missing after the muffler.

I eventually have planned to put the weber 32/36 carb on it. I think the misfire is due to the current carb being gummed up. So have been running carb cleaning in the gas. Helping a little but not 100% yet.

All I have time for today. Talk to you all later. Have a good Easter.

Facime
04-20-2014, 08:19 PM
the 20R carb is crap. Dont waste time or money trying to rebuild it.

This 38 is DIRT cheap:
http://portland.craigslist.org/mlt/pts/4427863320.html


also a good read on the 32 vs 38
http://www.redlineweber.com/html/application_guide/making_the_right_choice_32.htm

regarding your misfire, Im assuming that has the stock electronic ignition, and not a points disributor? If you replace the cap and rotor I would highly recommend a genuine toyota set. They are more money but its been my expereience that the aftermarket parts in this area are incredibly poor quality. Also, start with a compression test. There is nothing more frustrating than trying to run down a misfire only to find later that you have a cylinder thats way down on compression. Another thing about 20R's is that they do need regular valve adjustments. Its my experience that a quiet 20R is one that needs service. A properly adjust valve train SHOULD make a little noise. Adjusting the valves is pretty easy but does benefit from a little experience. Adjusting is done with the engine hot, so you kind of have to be quick about it.


If you are ever on your way to Newport, look me up on your way and I'll be happy to take a look at your car and offer up what I can.

Galcobar
04-20-2014, 09:25 PM
Welcome