20r head swap onto 22re
05-02-2010, 07:27 PM
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20r head swap onto 22re
Has anyone hear that the 20r head puts out more compression then the 22re. and you can swap them and they bolt up easily? any input will help thanks.
05-02-2010, 07:39 PM
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any researching on your part would help to...
No, I wouldn't do it... B/c the pistons take up way less space, but you can do it...
22R pistons are bigger and just barely fit inside the 20R chambers... That = high compression.
And the biggest why I wouldn't do it, there is no way to put EFI on a 20R head... Yet...
Using a 20R Head on an 85-95 22RE Block
Now if you had a 80-84 22R block and were carbed, that's another story...
No, I wouldn't do it... B/c the pistons take up way less space, but you can do it...
22R pistons are bigger and just barely fit inside the 20R chambers... That = high compression.
And the biggest why I wouldn't do it, there is no way to put EFI on a 20R head... Yet...
Using a 20R Head on an 85-95 22RE Block
Now if you had a 80-84 22R block and were carbed, that's another story...
Last edited by tried4x2signN; 05-02-2010 at 07:42 PM.
05-02-2010, 07:47 PM
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Yesit does have more compression and can bolt up but i would put 20r bearings in the lower end and if you port and polish it so that it is not round they really run good
05-02-2010, 09:09 PM
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No. There is currently, 2MK, no ECONOMICAL way to use EFI with a 20R head...
Though there is a guy here with a post looking for feedback on making an adapter...
Which would be cool b/c of the Turbo applications...
Try googling "20R EFI" see what you come up with... who knows?
amazing question answerer that google...
Last edited by tried4x2signN; 05-02-2010 at 09:11 PM.
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05-02-2010, 09:58 PM
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so looked around a little bit and found this
http://sdsefi.com/techinta.htm its a site on how to build your own intake.
http://sdsefi.com/techinta.htm its a site on how to build your own intake.
05-02-2010, 10:06 PM
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ok, I'll do some more...
You'd be FAR better off just to buy high compression pistons from LC Engineering, unless you're a master fabber...
1, 22RE pistons are almost flat top pistons.
2, (80-84) 22R have a high crown or ridge on the top. Some may call them high top pistons, but it's a bowl more than just straight across...
3, The 22R block was de-decked in 1985 so any head after that will have to be machined... A LOT.
4, You're removing mass and it's a fairly complex and costly task, so what's the point.
5, The 20R chambers are 80/82 cc's. So I'm almost positive you can't machine off enough surface to account for the loss in mass the "high Top" of the 22R pistons displace... So there is no way the compression will be as high as it is, using the correct high-deck 22r block
You'd be FAR better off just to buy high compression pistons from LC Engineering, unless you're a master fabber...
1, 22RE pistons are almost flat top pistons.
2, (80-84) 22R have a high crown or ridge on the top. Some may call them high top pistons, but it's a bowl more than just straight across...
3, The 22R block was de-decked in 1985 so any head after that will have to be machined... A LOT.
4, You're removing mass and it's a fairly complex and costly task, so what's the point.
5, The 20R chambers are 80/82 cc's. So I'm almost positive you can't machine off enough surface to account for the loss in mass the "high Top" of the 22R pistons displace... So there is no way the compression will be as high as it is, using the correct high-deck 22r block
Last edited by tried4x2signN; 05-02-2010 at 10:12 PM.
05-03-2010, 04:49 AM
#10
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so let's sum it up 
yes, it's been done in the past
it will in fact bolt to the block, but it's all the other little factors that make it not your average bolt-on
it will in fact bolt to the block, but it's all the other little factors that make it not your average bolt-on
08-26-2019, 04:13 PM
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Try lce sidedraft efi for 20r head for it but I think the best way to use it would use a after market ecu like haltech or megasquirt for the efi, spark, and timing. I'm thinking about doing it myself for a project but I'm not to sure yet. I'm not sure about my budget or how much I want to have for power low and high end and even torque. I have to do a lot more research on my part for air to fuel ratios and how to control the spark and timing.
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