Topic: 22RE/20R Head?

[yotatilla]

Hey there,

I have heard a lot about putting a 20R head on a 22 series motor. I have heard somethign about the valves, but I still don't know much. I am in the process of rebuilding my 22RE from my 86 4Runner, and I was wondering what this would do for power and whatnot. The head on my engine could be junk anyway, I have torn it off yet. I had my timing chain break and I can only assume that havok was wreaked in my vavle are, and my head could very well be junk anyway. Any info is greatly appreciated. Thanks.


Sam

[jimbo74]

you put the biggest oversize valves you can in the 20r head, you get better power across the band... incresed compression

[kneedownnate]

You're nearly sol on using a 20r head on the re motor if you wanna stay efi.  It can be done but takes a lot of work.  Check the archives, I was looking at doing the same thing some time ago and had trouble finding info, but somebody posted a link to exactly what I wanted to do.  I saved it on the old computer but it's now dead.

[Rocksurfer]

20r/22r swap is for carbed 22r's not efi's, sorry to burst your bubble. With the 22re you wouldn't be helping your performance by doing the swap anyways.

[Marlin]

The 20R head uses a 98 row timing chain with a thick style head and a tall style block.
85' and newer 22R's use a 96 row chain and a thin style head and a short style block.

The 20R head will not work on the later block without milling about 0.140" of material to turn it into a short style head.

I have done this many times, however, your efi intake mainafold will not bolt up so this is not a good chang over for your application.

[jimbo74]

oops, i didnt notice you were trying to put a 20r head on a 22re..... yeah that wont work..... you said 22series so i automatically thought 22r because i have the carbed one

[Rocksurfer]

oops, i didnt notice you were trying to put a 20r head on a 22re..... yeah that wont work..... you said 22series so i automatically thought 22r because i have the carbed one

  Hey Jim Marlin just posted about how you could do the swap and how it can be done but not worth the effort unless you are going to use a carb on it.

[jimbo74]

  Hey Jim Marlin just posted about how you could do the swap and how it can be done but not worth the effort unless you are going to use a carb on it.

i know what marlin posted... if you bothered t oread what he posted he also said not worth it because the manifolds are not the same, and will not bolt up.... therefore negating the whole point without some major custom fabrication

[yotatilla [OP]]

Thanks for the info guys, I did not realize that the head only worked with EFI.


Sam

[jimbo74]

Thanks for the info guys, I did not realize that the head only worked with EFI.


Sam

actually its the oterh way around... the 20r head works on the 22r engine.....

it will work on the re, but the re is capable of more power and the manifolds would need to be custom

[Rocksurfer]

Actually what marlin said is that you can use a 22re block with a 20r head with some minor modifcations, that he has done it but that you can't bolt the efi to the 20r head. So someone like me could use that engine because I am carbed, but if you have and efi truck you are wasting your time since the fuel injection could not be used.

[yotatilla [OP]]

Ooops, I cant type either, but you got the gist of what I ment. That kinda stinks about the EFI not being able to be used, but there are other ways to get me some power. Cam and whatnot, all that jazz.


Sam

[kneedownnate]

I re-itterate, it can be done but is a pita.  Do a search for my thread on it and in one of the last posts you'll find a link to a page explaining how to do it.  First things first though, you would do what marlin said you need to to run the 20r head on an efi block, then do what the page says to use the efi intake plenum.  It is a big pain in the ass but can be done.  I still want to do it but currently don't have the parts/resources.

[kyle_22r]

my 20/22 hybrid with 32" swampers and 4.38s will outrun my 22RE truck with 235 tires and 4.10s any day of the week.  the 22RE truck would win in a towing contest though, that's why it's my dd.

[79coyotefrg]

all you gotta do is pump up your compression ratio,  if that chain broke, you may very well need new pistons,  go with 9.7:1 LCeng pistons and a cam

[hdrisc]

http://www.cascadecrawlers.com/index.php?option=com_content&task=view&id=17&Itemid=40