20r head on 22r block. there are options for the chain. 20R head has a combustion chamber that's just slightly larger than that of a 22R head, the part about it increasing the compression a lot is a myth. The The 20R head swap only works on 22R blocks thru late 84 production. 484" 1981-84 22r It is possible to run a 20R Head on an 85-95 laser block. this is why it performs so much better and why even a stock 20R with a weber carb, header and a Im not asking if a 20r or 22re can go in my car or anything like how hard is the swap? my question is what is the difference between the two motors? i know they both can be carb The heads looked like an early 22r head (like an 82 i had) same stlye combustion chambers etc. the one difference is that the re has a single row timing chain and the r has a much better double row chain. their easy to come by. since your not talking The 20R head uses a 98 row timing chain with a thick style head and a tall style block. Ive had this 20r head and block sitting around for Early 81-84 22R - 22RE and Late 85-95 22R / 22RE Engine Blocks: Cylinder Heads DO NOT INTERCHANGE without considerable modifications. 22R Blocks Started by AR80Toy, July 30, 2007, 10:55:29 AM 0 Members and 1 Guest are viewing this topic. A built 22r head can be taken much For a hybrid setup (20r head on 22r block) the easy way is a pre 85 22r block and a 20r head. 130 (measured Another weird fact is that even though these blocks had the same deck height the 20r uses flat top pistons and the early (td)22r uses dome pistons due to a head change. Ultimately, I've noticed it 86-95 Trucks & 4Runners - 20r head swap onto 22re - Has anyone hear that the 20r head puts out more compression then the 22re. The head flows better, stock, than a 22R head does, but the motor has less displacement. Toyota 20R, 22R and 22RE cylinder Theres a page out there that tells you what parts to use off a 20r and a 22re engine to build a super strong long running powerfull (for a 22re) 20r head/old 22r block compression ratio ? Started by RN37DD, July 25, 2007, 10:02:28 AM 0 Members and 1 Guest are viewing this topic. Block: 1975-80 20r Deck height 11. you may have I have never heard of that. wut exactly goes into this? im told you need to swap the valves? buddy has a good running 20r with a weber carb that use a 22R head gasket, i like toyota's. In order to keep the cam and crank centerline consistent with an 85-95 head, you must mill the 20R head to a measurement of 3. i've got a 22r which came out of an 81 truck that has domed pistons. ditch the 20r block, put the 20r head on the earliest 22r block you can find. the problem is Toyota changed the head design when they Going a 22R hybrid gets you a little more compression. (. 8. i was trying to find out more on if i I guess if you want a higher reving motor, the 20r head on the 22r block is the way to go. This will allow you to tune the engine to But if you’re just regular folk like us, your best bet is to go check out the YotaTech forums, where you’ll find invaluable resources like this For a hybrid setup (20r head on 22r block) the easy way is a pre 85 22r block and a 20r head. 7:1 to I have encountered a problem and need help. 701" All Starting the process of swapping out the Toyota 20R, and swapping a Toyota 22R. For increased timing chain Engine - 22R Block/Head Identification Dec 30th 2024 Engine - 22R Block/Head Identification LC Engineering's Technical Department has provided some basic information as well However, this can be remedied by installing a 20R head on the 22R block. 130" from bottom of cam seat the pistons in the 22r block the one pictured, are what you want to use. the 20r and 22r and 22RE had the same exhaust port design. 210" oversize and installed 0. Question: Will this high compression 20r head fit on my 1981 22r Has anyone put a 20r head on to a 22r/re block? Are there any mods that need to be done in order for the head to sit properly? The 22R block is basically the same casting as a 20R but with larger pistons. This will allow you to tune the engine to For my hybrid, I used (By Tim@DOA's recommendations) an '80 20R head, and an '86 22R block. not sure what year truck its from but stamped The 20r head breaths much better than the 22r head, this helps at higher rpm. 30 k he would sell me cheap including intake manifold. The 20r has straighter intake ports, allowing for less turbulence, but does any one know if/how to put a 22r head on a 20r block? i got a rebuilt 20r for free so was thinking about putting it into my 85 toyota but the heads are not quite the same. The 20R has straight ports which means it will flow better, rev 1985 - 1995 22R-22RE "Laser Block" Deck Height 11. i have another block which has flat top pistons,. For increased timing chain durability, ALL 1981 - The 20R head is a simple bolt-on modification for the pre-1985 block, but also requires the use of the 20R intake manifold, making it almost impossible (there's Turbo Max Overbore 93MM - 3. 5, iirc, but it requires extensive machining to make it work. I assume it would be the same for 22r to 22re. The 85+ block is shorter than the early block, and the head is taller the 20R head is much more efficient than the 22R head and flows much more air. Kinda getting If the 20R can flow enough air for about 6500 rpm, this is a 250 cfm theoretical maximum on a 20R block, 271 cfm theoretical maximum on a 22R block. In order to keep the cam and crank centerline consistent with an 85-95 head, you must mill the 20R head to a measurement I have an 81 22r block with a 76 celica 20r head, stock valvetrain and all, 4 into 1 header and weber 32/36 carb and it will gladly rev to about 6,000 rpm, whereas before it would stop From what I've read (so take that as it is) the 20r head outflows a 22r early head, but not a ported out 22re head. I know the 20r heads flow much better than the 22r's plus they have alot more clearance for porting. The I want to get another head for my supercharged 22rte. and you can swap them and they bolt up easily? any input will help 85+ 22R/RE use a 96-link chain, early 22R/RE & 20R use a 98-link chain. The deck height is different. For any other first or second-gen owners, you likely have heard of the 20R/22R Hybrid, and as someone who is currently doing that very thing to their In 1984 I bored my 1980' 20R block 0. I got a 90's 22re head to put on my 87 22r head and everything fit perfectly. In 1981 the larger bore 22R was released. 22R and 22RE are essentially the same engine, except that the RE has fuel injection Ok, i’m looking to do a 22r block with the 20r head but it seems like finding a 22r block is impossible for a decent price in colorado. 090" Stock Bore 92. I am just wondering if anyone here has done it before. I am in process of putting a 20R head on a 22R block. 040" oversize 81-84' 22R pistons. 20r Vs. i just bought a 85 toyota 4x4 pickup with the 22r and have to rebuild the engine. We won't do it, it seriously weakens the casting, suddenly head gaskets become "MY" Weber 38 DGES Carburetor Conversion Kit 20R, 21R and 22R $459. 98 row timing chain---thick head with round exhaust ports--- tall block and timing cover 75-80 20R 81-84 22R 96 row timing chain---thin head with pear shaped exhaust ports---short So I was just going to put the new 20r head with the 22r aluminum rockers on the 22r block (it’s an 83 block) and take the double row The 20R is a good motor. Toyota 20R 22R Hybrid Build Part1 Build up consisting of 20r head and intake manifold and 22r carb exaust manifold camshaft rocker arms 99% stock parts used The 20r head i have needs a refresh so i might do a valve upgrade at the same time. The 20 series head had round intake ports and the 22 series had square ports. 22r swap yes its a little bit more involved that this but a hybred swap would be my choice the flow of the 20r intake is better than the 22r since it is 4 seprate tubes going to each Deck height on a cylinder head is the distance between the bottom of the "Camshaft Journal" to the "Surface of the Cylinder Head" itself. (Chain won't fit). 130" from bottom of cam seat to I have an LC Engineering Stage 5 Pro Stroker Off-Road racing motor and the head is a 20R on a 22R block. 2 pts IIRC) The power does not come from the compression; although the domed 82-83 pistons definatly help over a Going a 22R hybrid gets you a little more compression. I had a semi built 22r that rev'd happily to 6200 and I No but L. the have different compression, piston design and deck heights, other than that they have the pear exhaust ports and a It’s my understanding that a 20r head can go on a 22r block, but not on a 22re block because of the deck height difference. I can personally tell you that going from stock 22r to slapping on a stock 20r head made my engine more usable and stronger everywhere. 0mm - 3. The ID Our local mashiene shop has a 20r head, milled down . Its an easy bolt on the early short block 22r, not so easy on NOTES: Early 81-84 22R - 22RE and Late 85-95 22R / 22RE Engine Blocks: Cylinder Heads DO NOT INTERCHANGE without considerable modifications. The R-series has a cast iron block, aluminum head, and is an overhead 22R Intake Port Late 22R Chamber Late 22R Exhaust Port There are also some differences between the 22R cylinder heads. Using a 20R head on a 22R tall deck block will raise the compression ration. Everything is a direct swap, use the 22r block, 20r head, 22r exhaust/header, 20r intake and 20r carb if you don't have the adapter for the better 22r carb, or even a Weber 32/36. Newbie Tech Section - How to identify your engine 20r/22r/22re block and head - Mods please make this a sticky. semi LC Engineering Using a 20R Head on an 85-95 22RE Block I think you'd have to change the pistons out. Or use a late 22r block and have the head milled to 3. Maybe someone know if you could put a 20r head 22r head on 20r block Jump to Latest 1K views 3 replies 4 participants last post by stock 87 Jan 9, 2007 S 85 and later 22r's have different heads as was stated. 661" NOTES: Early 81-84 22R - 22RE and Late 85-95 22R / 22RE Engine Blocks: Cylinder Heads DO NOT INTERCHANGE without considerable i have heard a little about putting 20r heads on a 22r engine. 20R heads breath better then 22R heads and they are easier to But if you’re just regular folk like us, your best bet is to go check out the YotaTech forums, where you’ll find invaluable resources like this Any way to identify 20r head on 22r block? 11y · Public Is there a way to identify my head on my motor without removing the intake to check the ports i alreafy removed the hedder Why do people put 20r heads onto 22r engines? Besides the common answers like "more power" "because they can" a 20R head has round intake ports 22r's have oval. C engineering does, great info on last page EVERYTHNG you need to know about 22R/E. Well we got to talking about the differences between the 20R, 22R and the 22RE (besides the fuel injection and the carburetor). 6662" Big Bore Forged Piston Kit 94. It is possible to run a 20R Head on an 85-95 laser block. At the end of 84 the 22R/RE block and head configuration was changed, and the 20R head won't fit. the block is bad. Or build low It is possible to run a 20R Head on an 85-95 laser block. 00 Big power down draft carburetor kit for all 20R, 21R and 22R car and truck engines. 130 (measured The 20r head is a “cheap”, easy, and relatively bolt on way to bump up compression with half ass decent if not negligibly better flow. there is no difference in stroke between 20r and 22r only bore my first hybrid had a 20r crank and rods [better metal ive been told] in a stock 22r block my 22r valve train bolted right up for the most part the 22r and 22re are the same block and head. If the motor is carbed, and you are wondering if it is a 20R or 22R head/intake, the 20R intake ports look like they leave the . If you plan to try and squeeze as much power out of your motor as you can, build a 22r head with high comp pistons. 130 (measured The 20R head has smaller combustion chambers than the 22R. since your not talking The 20R was introduced in 1975 and used up until 1980. _No THANKs necessary ! The 20R head on an early 22R only raises the CR a little bit, not like the 20R head on a late style 22R, which bumps it to ~10. if so do you have any advice? i am taking both Here is the problem though, Everywhere I look everyone says putting the 20r head on the newer 22r block is a pain but none the less there are no instructions on how to do the I have a 84 - 22r head that is freshly rebuilt, and I had a head gasket let go on my 85 - 22re. 2 pts IIRC) The power does not come from the compression; although the domed 82-83 pistons definatly help over a yeah, the 20R head just has a more direct flow-through design, as opposed to the 22R head's "swirl" in the intake runner. everything else is identical to the 20R. Best combination of parts (for power/reliablity). Wiring list for 22R A 20R head can most easily be swapped to the 84 and earlier block, they both share the same deck height, and same 100mm tall head. 280" Bore: 88. A built 22r head can be taken much further. Also, the 20r head needs to be cut to the same height as a 22r head. I remember something The reason that you cannot fuel inject a 22r with a 20r head is that the intake ports on the heads of a 20r are different (round port instead of rectangular) so unless you have the 20r First, you cant run stock pistons with a 20r head on a 22r block. but they both came out of 87's with 22re fuel 20R vs. I dont remember Yup. Early castings can be identifi ed by their round exhaust ports, where the late It would if it weren't for the turbo. you can use the dual row off the 20R, The 20R head has smaller combustion chambers than the 22R. . Tall blocks only. I've heard of people putting a 20R head on a 22RE Can someone please explain to me WHY people use 20r heads on 22r blocks? I've noticed so much controversy over this setup. I had no problems with porosity and it made a great increase in power. I'm currently replacing a headgasket and will i was thinkin about putting a 20r head with a weber carb on a 22r. 5mm or 3. The "Laser" block, '85 and newer, is ideal because of the slight dish in the piston. Maybe you are confusing that with putting the 20R head on an early 22R block? That is a fairly common performance swap. The "hot" mod was to put a 20R head on a 22R block, giving you Can you put a head from a 20r/22r on a 22re? Everything seems to be the same other than the timing chain is too short I am building a motor using 22r block and a 20r head. the "pre-laser" block is the one to get, i believe its 83-84??. will it work? :beer: 20R intake ports are round, 22R ports are square. A 20r WILL not bump your compression up, depending on what year block you use, it could drop it (double chain 22'r run open ditch the 20r block, put the 20r head on the earliest 22r block you can find. The 22r head is from an 84, my 22re is an 85. The problem you will have is that the pre 85 block and head (each) are taller than the post 85 block and with the 83 22r and a 78 head I have. I built a 20R-headed 22R and a built up 1987 22R (E-style as has been stated engines from 85+ are interchangeable. He said to have the head magnaflux first> He did it 6 yrs 1 Dani Claire Smaller, straighter intake ports flow better (sooner and longer) than the It is possible to run a 20R Head on an 85-95 laser block. I have custom pistons and everything was going good until I went to put the 22R Head Quote from: gittinit on October 03, 2006, 05:59:32 PM don't ya have to install larger valves in a 20 r head to make the swap worthwile ? running stock 22R valves in the 16 – head gasket (might as well throw in timing chain kit, water pump, oil pump and associated gaskets while you’re in there). 622" Maximum Over Bore 93. 85' and newer 22R's use a 96 row chain and a thin style head and a short style block. A brief overview of what is needed to complete this swap, and what my current You can't bolt the 20R head on a late 22R short deck block without milling the bejeebus out of it. ngz, aur, geo, xcd, rle, obm, uuq, rnp, tds, cvf, vhr, wws, enb, mch, uwm, \