EFI conversion (85 22rEFI to 80 20r)

[#9CGAZ]

This is my first post and my first Toyota, trust me you will hear more from me, both reply to others and asking bunch of question's, it is so much easier when someone else has already done somthing then to do all the trial and error problem solving yourself.

My question can you or let me re-phase that has anyone put a EFI system on a carb. motor, to be specific a 1985 EFI 22r on to a 1980 20r. My carb. is giving me fits! It is one of those years with miles of emission crap, and since I live where I dont have any vehicle emmisions testing (pinal county,AZ) I unhooked about everythin and plugged, like it shows in my hanes manuel for a canadian vehicle. The truck runs good at time's, wont idel at others, surges somtimes, idel races way up somtimes, it is like driving a different truck everytime i get in it, lol.

And in my manuel it sez to look on label under or on hood for timing info...well my label is long gone, anyone know where i should time it, 1980 20r.

spent good part of yesterday reading throw this forum, it is really good.

Jeff

[KToy]

u need a 22r motor and then u can add 22re efi stuff. as far as i know they 2 motors line up.

but a 20r is a diffrent block and head.

[#9CGAZ]

Okay so what is all the talk I hear about using a 20r head on a 22r block they have to be carburted then?

[bbagwell]

A 20R and 22R have different intakes. A 22R intake won't go on a 20R head and vise versa.

If you put a 20R head on a 22R it has to be carbed. You use the intake from the 20R with a carb on it.

[SuperRunner]

Actually, I am doing the very same thing right now, only it is a 22R carb instead of a 20R.

This does require some custom stuff, but an easy way to do it is...

Some of your bolt holes will not line up, so what you can do, as drill and tap through the top of the head into the valve cover area. All the bottom bolts(at least for a 22R line up. It is the top one's, only one of mine lined up. After you drill and tap through the head, bolt in a stud using some FIPG, and run it through the head. After you get enough threads through the head, put a bolt on the back side of it, that will give it the strength you need. If you don't thread the hole and use sealant, you will leak oil where you drilled.

Anyway, there you go, that should work. Not really too hard. I am not done with mine yet, but perhaps by mid week I will get it done, and I will post some pictures.

[SuperRunner]

here is a pic of my 22R-EFI conversion.

http://www.supracharged.com/other_trucks/yellow/22R-EFI.jpg

[mallkrawler]

find a later model 22R engine (83 and up I think) Toyota started tapping the heads for EFI in those years. So all your EFI stuff will bolt right up...

[SuperRunner]

I think it was 84, because I have an 83, and nothing on the top lined up.

I actually welded the intake, and parts of the head so I could use some of the old, holes on the head, and some of the new holes on the manifold.

[mallkrawler]

Figures that's my luck!!! I have a really good running 83 22R that I was gonna swap the intake and exhaust manifolds from my RE. So I could have a running truck. But, 84 does seem to be the year. That's when they changed a bunch of stuff over on the minis. I just thought I read somewhere that Toyota started building the EFI heads in 83. Or at least the EFI intake would bolt up.

[SuperRunner]

maybe really late 83's. I will have to see when mine was built.

You can still do it, it is just a little harder.

[#9CGAZ]

find a later model 22R engine (83 and up I think) Toyota started tapping the heads for EFI in those years. So all your EFI stuff will bolt right up...

So you are saying put the 22r head on my 20r block? And I do have access to the 85 head that the efi is or was mounted on.

[Bloomcounty]

Okay , this can be a tricky question ! If you have a early 22R (81-84) you can put a 20R head(75-82) on it with no machining ! the timing chains are the same length ! My 2 cents you cannot put a 22r injected intake on a 20r because a 20r has round intake ports and a 22r has square intake ports ! so if you want to put fuel injection on your 20r you need to find a fuel injected 20r ! I think I've read they come in celica's or one of those small cars like that . For the other question No all 22r heads don't enter change !! 81-84 22r has a deck height of 9.120 for the block and 3.290 for the head ! The 85-95 22r has a deck height of 8.930 and 3.130 for the head ! how ever you can machine the early model head to fit the late model block, but you would have to shave at least 130 thousands off to even be close ! that is way to much in my opinion to be dependable ! Oh also beware if you have an early 85 truck it may still have the 84 style motor ! Mine did !
Just incase anybody is wondering most my info came from http://www.lcengineering.com/TechNotes/TechNote8.htm :read:

[tonkatoy]

hey bloomcounty , in the pic above does it run or did you take off the vac lines and wires for the pic and what year is the efi :beer:

[SuperRunner]

hey bloomcounty , in the pic above does it run or did you take off the vac lines and wires for the pic and what year is the efi :beer:

That is actually mine in the picture above.

That picture was taken before it was finished. It has been finished since last thursday...almost a week now.

I still don't have the vacuum lines hooked up, I just have them plugged off. But, for some reason, I am having a problem with stalling when idling for a long time...like at a drive through.

EFI is from an 84 or 85. I will probably try to go with 86 or newer if I can find an ECU.

[tonkatoy]

dam i am a dumba$$ sorry i was just wondering cause my efi came off an 87 4x4 truck along with the ecu and i cant get it to work. we tryed to do the 3w bulb trick by putting the wires that are attached and put them in the terminals that attach to the injector and the light is supposed to light up and it goes on right when the engine turns over and then it dosent have any power after that. also how reliable are injectors will they brake easliy . dont mean to change this thread :Thumbsup:

[Bloomcounty]

#9CGAZ does this help or are ya even more confused . :Freak:

[StarWolf]

I have to give this Poast an Awsome bump! its been incredibly helpfull infact Bloom answered the questions that where drifiting through my head perfectly!

Thanks guys, :D

[slacker]

heres one I did ....
http://www.members.shaw.ca/slacker501/IM000845.JPG

its the early style EFI (84) The reasion I chose this year was because you can put the double chain into it with no problems . http://www.members.shaw.ca/slacker502/images/IM000466.JPG

also the earlier style engines do not require a speed sensor , 85 --> have the speed sensor in the speedo .

with the 84 <---- I was also able to install the "check engine" diagnostic plugs (seen in the pic) , along with a light in the speedo cluster .