:::RHMT::: Real Home Made Turbo
General Category => Hybrid/Tech => Topic started by: 98vtec on March 07, 2009, 05:07:58 PM
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Cranks
F22 - 50mm mains, 95mm stroke
F23 - 55mm mains, 97mm stroke
H23a1 - 50mm mains, 95mm stroke
H22a/a1 - 50mm mains, 90.7mm stroke
H22a4 (1997) - 50mm mains, 90.7mm stroke
H22a4 (1998+) - 55mm mains, 90.7mm stroke - some 98 motors were produced in 97 and have 50mm mains so be weary of what you are buying
H23A - 55mm mains, 95mm stroke
all use the same rod journal diameter at ~1.8890"/47.98mm besides the F23
Crank pulley bolts
* 92 F22 - 14mm
* 93 F22 - 14 and 16mm
* 94 F22 - 16mm
The F22 and H23 cranks are going to have the same bolts between the years since they have the same part numbers....right?
* 1992, 14mm F22/H23 crank part number is 13310-PT3-315
* 1993 has options for both cranks
* 1994, 16mm F22/H23 crank part number is 13310-P0A-000
Rods
Length
H23/F22 - 141.5mm
H22a - 143.0mm
Pistons
Compression height
H22a (non type S) - 31.01mm
Intake Manifold/Throttle Body
F20b (auto)
Throttle plate - 55mm
Manifold inlet - 58mm
H22a
Port ID - ~53mm (each one is a little different)
Port spacing - 40.26mm
Throttle plate - 60mm
Throttle Inlet - 62mm
Manifold Inlet - 62mnm
Injector port Diameter - 11.56mm
Primary runner length - ~11"/279.4mm
I've got some more stuff in storage to measure and I'll get to that the next time i go out there.
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Automatic f20b manifold/throttle body combo is uber gay
55mm sohc throttle body
57mm plenum manifold
Theres your loss in power. Add h22a manifold/throttle body you have a 5spd f20b thats all kids.
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Automatic f20b manifold/throttle body combo is uber gay
55mm sohc throttle body
57mm plenum manifold
Theres your loss in power. Add h22a manifold/throttle body you have a 5spd f20b thats all kids.
interesting. Do you have any idea why they decided to limit the auto so badly?
thanks for the addition, i'll slide it in there
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I have no idea
I mean a sohc 55mm throttle body on that motor is a joke. The plenum is just has bad. I dont get it its the only automatic motor I have ever seen from honda where they really messed with the intake/throttle body so much,killing the top end power of the f20b head.
Bottom half plenum has same bolt pattern has all 3 piece h series manifolds so a top half off a h22a can be interchanged.
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i take it the manifold inlet was just reduced and they left the rest alone? I was just looking through some pictures, externally it looks the same as the h22a.
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Just went and measured it the inlet is actually 58mm hadnt looked at it months. Ill do some measuring here in a couple days along with pics of the auto f20b manifold vs the h22a jdm manifold