Numbchux

as some of you may know, my turbo runner has some knock. I'm planning on fixing it (or trying...however temporary it may be).

a buddy offered, however, a 22RE shortblock out of a camry (I beleive...) for cheap. I assume there are compression differences between the N/A and turbo versions. but is it via head differences? or are the pistons different too....if so, could I swap my pistons into the shortblock, crank, and rods from the camry?


I've searched, but am having alot of trouble finding stuff specific to these 22RETs...but if you've got a good link for me. please, post it!

Injected1

I believe the 22rte has a compression ratio of around 8-8.5:1.. The 22R - 22RE's are somewhere around the 9.3-9.5:1 range. I'm not sure, but I would imagine that the camshaft grinds are different for the forced induction application. They may not be different, but it doesn't make much sense if they aren't. As far as I know you just NEED the lower compression pistons to make it work. There may be an oil fitting for the turbo that you need to plug in somewhere. I'm sure someone on here that has a RTE knows more than me and will chime in here.

dcg9381

I don't have the definitive design specs of the 22RTE piston, so my information isn't 100% factual - but I believe the 22RTE compression is somewhere in the neighborhood of 7.5-7.8:1 - it's really low.

Only other differences are an oil feed and oil drain:
http://lakebox.dnsalias.com/photos/1...neexhaust2.jpg

Some fabrication would be required to hook a CT20 to a 22RE block, but nothing major.

There's a spot for an oil feed on the passenger side of the 22RE block, just behind the motor mount. Alternately, you could tap the drivers side - but honestly, I don't know where.

For a drain, just weld a drain into the top most portion of the oil pan

Use the 22RTE pistons.. They're required.


Honestly, I'd use the 22RE head - it'll bump your compression slightly, which is good as it's really low - and the 22RE head isn't as prone to cracking.
Exhaust valves are a different material between the 22RTE and 22RE (Per Tim @ DOA) - Either don't worry about it, swap, or use Ted's stainless .5mm over valves.


To answer your question:
Crank and rods, yes.
Pistons, no.
Pistons are cheap.. Say $100. Turning the crank, another $100-$200.
Gaskets $100. Rod R&R - or replace - $100-$150.
I forget what it costs to bore a block...

AxleIke

The RTE does have different cam shaft grinds=thicker, and stronger. It also has specific oil ports for the turbo, lower compressoin, and different pistons. You can bore out a 22re to the right size, and use different pistons, but the camshaft may give you problems

I looked into converting my 22re to a 22rte, but it seemed too risky, since i have a nearly brand new engine. If you do try this, let us know how it works, and how you did it.

Injected1

Wow.. I knew it would be lower for forced induction, but dang that's way down there.. LOL

dcg9381

Maybe I don't understand - you're saying the camshaft itself is physically a different size? Or you're saying that the lobes themselves are thicker?
I've never seen any indication that the cams won't swap and I've never heard of a "stronger" camshaft. In terms of lift and duration, they may be different - not entirely sure... Guys on the 22rte yahoo group will know.
Why would you need a "stronger" camshaft?


Oil ports = oil feed and oil drain. Like I said, you can use a 22RE to get the same functions.

The bore size of the 22RE and 22RTE is the same, discounting rebuilt motors that have already been bored.

Injected1

Surely if they ARE different, it would just the the specs. (duration, lift, and possibly lobe separation angle) I see no reason why it would have a "stonger" cam.

Yota82

The 22RTE Turbo engine is a similar but entirely different block and head. The block was drilled with different oil passages to accommodate the Turbo oil requirements. The cylinder head's combustion chamber had a different shape and the pistons were dished.

dcg9381

References on the 22rte board indicate that the cams are exactly the same.. even a few people using Ted's (engnbldr's) crawler cam.

Here is a better list of details.. Don't get stung by the clutch as I did - buyin one for the 22RE! (anyone want a deal on a hays brute 22re clutch?)

Anyway:
> > I have a 1986 22RTE, gas, and am in the process of
>
> > rebuilding/restoring it, below are some of the
> things I have
> > discovered.
> >
> > The Cylinder head on the turbo is different than
> the 22RE (smaller
> > combustion chamber than some 22rs, bigger than
> others).
> >
> > The Oil Pump is different (higher
> pressure/volume).
> >
> > The ECU is different (and wiring harness).
> >
> > The igniter is different (and wiring harness).
> >
> > The Combo Meter, A.K.A. Gauges, Instrument Panel
> is different (green
> > turbo LED and Turbo Warning light added).
> >
> > The Exhaust manifold is different, of course.
> >
> > The Air Intake Tube (from turbo to throttle body)
> is different.
> >
> > The Throttle body (upper intake assembly) is
> different.
> >
> > The Pistons are different (dished).
> >
> > The clutch is different, heavy duty.
> >
> > The radiator is different (port added for turbo
> cooling on top).
> >
> > The Block is different (ports added for oil
> pressure and return
> > lines, although some 22RE blocks may be modified
> to be used on turbo).
> >
> > The lower radiator hose assembly has been changed,
> the turbo has a 2
> > piece hose (the main large hoses, there are also
> smaller hoses on the
> > turbo) to accommodate the turbo cooling.
> >
> > The gasket set is different.
> >
> >
>
-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-
> >
> > Some similar items are:
> >
> > The camshaft is the same.
> >
> > The piston rods are the same.
> >
> > The water pump is the same.
> >
> > The crankshaft is the same.
> >
> > The alternator power steering and AC compressor
> and mounting brackets
> > are the same.
> >
> > The upper radiator hose is the same.
> >
> > I am sure that Toyota made many other changes,
> these are just some of
> > the things I have discovered in working on my
> truck, Please feel free
> > to add/ correct anything you see.

Numbchux

lots of good info there! that helps alot.

the Head that I have was a brand-new one (NOT rebuilt/reman'ed....brand new casting) 24k miles ago. I have no reason to lose that. nor do I want to deal with more modifications. My subaru's 91hp was plenty, if only it had a stronger IFS setup, and better gearing. the Turbo runner has almost twice that....and it does have the gearing. I have no interest in performance modifications at this stage. and I don't have any money to spare on this project.

I would be taking the shortblock, crank, and rods from the 22RE, and adding it to the pistons, head, etc. from the 22RTE.


Could I use the higher flow 22RTE oil pump in a 22RE?

I've got a piece that installs between the block and oil filter for my old subaru that was for an oil cooler. could I use something like this for the lines to the turbo?

Or, my buddy added a turbo to his impreza, and he to a T-fitting that went under his oil pressure sending unit. and then had a fitting welded onto his oil pan. I know you mentioned welding a fitting onto the oil pan. but would it be possible to do the same with the feed line?


and what is this 22rte board you speak of?!

dcg9381

Yes, it's higher volume, not higher pressure.
A new 22RE pump is cheap, however... I've never heard of one failing, but the gears on the crank can get worn a bit.


Sure.. I think there are "remote" oil filter options for the 22RE.
You could also "T" off of the existing output for the oil pressure sender or use the hole that's capped behind the passneger side motor mount. Just take good care of your feed line, make sure it doesn't rub on things.

[quote]
Or, my buddy added a turbo to his impreza, and he to a T-fitting that went under his oil pressure sending unit. and then had a fitting welded onto his oil pan. I know you mentioned welding a fitting onto the oil pan. but would it be possible to do the same with the feed line?
[quote]

See above.
For the drain, you can drill the block or weld onto the pan.


http://autos.groups.yahoo.com/group/22RTE-Trucks/

Numbchux

sweet! thanks man!

midnightoys

in your post below i have a question? when i did my swap i used a 22re clutch and it worked so far as to went on seem little hard though had to draw it down.(bring together with bolts last 1/2 inch) and i use a thottle body off my old 22re (85) and was the same to everthing except i vacum spot extra. and the heads looked the same and i used it cuz you told me i could.

i know that you did yours right cuz yours runs right now so did i do wrong am i wrong?

dcg9381

The 22RE clutch shouldn't work with a 22rte... 22re clutch on a 22re flywheel.
22rte clutch on 22rte flywheel only... It's normal to have to crank the clutch down a bit via the bolts.

I don't think you did anything wrong.