1984 22RE convert to carb for 1985 22R truck?
06-04-2011, 07:07 PM
#1
1984 22RE convert to carb for 1985 22R truck?
I have a 1985 4x4 pickup with a spun rod bearing. The engine has 177k mi and I'm debating if it is worth the time/$$ to take it all apart, machine crank, bearings... OR I found a 1984 22RE (must be from a 2wd) rebuilt 10k mi ago for $500. I would swap over my fuel pump, distributor & intake etc. and remove those parts from the 22RE & sell them.
(the 84 22RE does have the newer style head with single row chain and pear shaped ports, so everything should bolt right up from my 85.)
From what I have gathered, the only difference between the 22R and 22RE heads of these years is that the cam.
Now I'm wondering if I take the 22RE block/head and replace fuel injection intake with carb intake, will there be a lack of vacuum and the engine may run poor?
Are there any other obstacles that might prevent this swap from working?
(the 84 22RE does have the newer style head with single row chain and pear shaped ports, so everything should bolt right up from my 85.)
From what I have gathered, the only difference between the 22R and 22RE heads of these years is that the cam.
the carbed cam is supposed to produce slightly more vacuum to draw the A/F mix through the intake manifold into the cylinder. the extra vacuum isn't required on the EFI models since the injector sits right at the intake port on the head.
Are there any other obstacles that might prevent this swap from working?
06-04-2011, 07:17 PM
#2
Registered User
since when does an 84 22re come with pear shaped exhaust ports? I believe the 22re was made before 85 but was in a celica, supra or something of sorts but not a truck but I could be wrong on the truck part. Maybe it's a late build date 84 and in reality it's an 85 engine? I am pretty sure the 82-84 Celica GTS 22re used the early model 22r head. Which means it would have the round exhaust ports. http://www.lcengineering.com/TechNotes/?techid=49
Cylinder Head Identification
1975 - 1980 20R Cylinder Head
Round Intake Port
Round Exhaust Port
80/81 C.C. Chamber
Intake Valve Diameter 43mm
Exhaust Valve Diameter 35mm
1981 - 1984 22R Cylinder Head
Square Intake Port
Round Exhaust Port
82/83 C.C. Chamber
Intake Valve Diameter 44.5mm
Exhaust Valve Diameter 36.5mm
1985 - 1995 22R-22RE Cylinder Head
Square Intake Port
Pear Shape Exhaust Port
52/54 C.C. Combustion Chamber
82/83 C.C. Chamber (Turbo) Intake Valve Diameter 44.5mm
Exhaust Valve Diameter 36.5mm
Engine Block Identification
1975 - 1980 20R Block
Deck Height 11.280\"
Stock Bore 88.5mm - 3.484\"
Maximum Over Bore 90.0mm - 3.544\"
1981 - 1984 22R Block
Deck Height 11.280\"
Stock Bore 92.0mm - 3.622\"
Maximum Over Bore (Cast Piston) 93.0mm - 3.662\" (+.040\" Over)
Big Bore Forged Piston Kit 94.0mm - 3.701\" (+.080\" Over)
1985 - 1995 22R-22RE \"Laser Block\"
Deck Height 11.090\"
Stock Bore 92.0mm - 3.622\"
Maximum Over Bore (Cast Piston) 93.0mm - 3.6662\" (+.040\")
Big Bore Forged Piston Kit 94.0mm - 3.701\" (+.080\" Over)
1975 - 1980 20R Cylinder Head
Round Intake Port
Round Exhaust Port
80/81 C.C. Chamber
Intake Valve Diameter 43mm
Exhaust Valve Diameter 35mm
1981 - 1984 22R Cylinder Head
Square Intake Port
Round Exhaust Port
82/83 C.C. Chamber
Intake Valve Diameter 44.5mm
Exhaust Valve Diameter 36.5mm
1985 - 1995 22R-22RE Cylinder Head
Square Intake Port
Pear Shape Exhaust Port
52/54 C.C. Combustion Chamber
82/83 C.C. Chamber (Turbo) Intake Valve Diameter 44.5mm
Exhaust Valve Diameter 36.5mm
Engine Block Identification
1975 - 1980 20R Block
Deck Height 11.280\"
Stock Bore 88.5mm - 3.484\"
Maximum Over Bore 90.0mm - 3.544\"
1981 - 1984 22R Block
Deck Height 11.280\"
Stock Bore 92.0mm - 3.622\"
Maximum Over Bore (Cast Piston) 93.0mm - 3.662\" (+.040\" Over)
Big Bore Forged Piston Kit 94.0mm - 3.701\" (+.080\" Over)
1985 - 1995 22R-22RE \"Laser Block\"
Deck Height 11.090\"
Stock Bore 92.0mm - 3.622\"
Maximum Over Bore (Cast Piston) 93.0mm - 3.6662\" (+.040\")
Big Bore Forged Piston Kit 94.0mm - 3.701\" (+.080\" Over)
Please someone confirm this as I am really curious.
You should be fine with an EFI cam in a carb'd engine. Afterall all of the EB cams are listed for either or.
Last edited by xxxtreme22r; 06-04-2011 at 07:23 PM.
06-04-2011, 07:25 PM
#4
Registered User
85 model year I believe is the one that has the hit and miss early late styles not the 84 model year. But again I could be wrong. 85 was the first year with a 22re engine at least in the 4x4's.
06-04-2011, 07:33 PM
#5
Ok I just called the guy and had him send me a picture from before he put the exhaust mani on and You were right... it DOES have the round ports.
So I guess at this point I'll be doing almost just as much work to swap my 22R top end on to his 22RE block than if I just had the crank machined & replaced bearings.
So I guess at this point I'll be doing almost just as much work to swap my 22R top end on to his 22RE block than if I just had the crank machined & replaced bearings.
06-04-2011, 07:35 PM
#6
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'82 was the first year for the 22r-e in the Celicas, they still used a mechanical fuel pump if I'm not mistaken. And vacuum advanced or vacuum assisted (something like that) timing.
I do believe '84.5 was the first time EFI was put into trucks/4runners. Very rare though. For sure '85. Most '84.5 would and could be considered '85 MODEL YEAR though, so its foggy.
OP, why not keep it EFI and get better mpg and moar powa?
I do believe '84.5 was the first time EFI was put into trucks/4runners. Very rare though. For sure '85. Most '84.5 would and could be considered '85 MODEL YEAR though, so its foggy.
OP, why not keep it EFI and get better mpg and moar powa?
Last edited by toyota4x4907; 06-04-2011 at 07:36 PM.
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06-04-2011, 08:14 PM
#8
Registered User
Ok I just called the guy and had him send me a picture from before he put the exhaust mani on and You were right... it DOES have the round ports.
So I guess at this point I'll be doing almost just as much work to swap my 22R top end on to his 22RE block than if I just had the crank machined & replaced bearings.
So I guess at this point I'll be doing almost just as much work to swap my 22R top end on to his 22RE block than if I just had the crank machined & replaced bearings.
06-07-2011, 06:41 PM
#9
His motor is from July of 1984 so it is a late model but the seller previously ran it in his 85 truck. So he already has modified the alternator and it already has the power steering on it.
He says that the exhaust mani from his 85 truck bolted up and he 'switched the plenums around on the intake' for that to fit.
The only issue I read is that I'll be needing to tap some new holes for my 85 intake to bolt to the 84 head, but I've seen some heads with both patterns so I'll have to go look at it in person.
Also since he had it in an 85 truck, he must have already switched out the mounts to fit so no headache there.
He says that the exhaust mani from his 85 truck bolted up and he 'switched the plenums around on the intake' for that to fit.
The only issue I read is that I'll be needing to tap some new holes for my 85 intake to bolt to the 84 head, but I've seen some heads with both patterns so I'll have to go look at it in person.
Also since he had it in an 85 truck, he must have already switched out the mounts to fit so no headache there.
Last edited by 6th Gear; 06-08-2011 at 07:19 AM.
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