B20a/B21a Motor Questions (DECK Height Needed)
Thread Starter
B*a*n*n*e*d
Joined: Sep 2007
Posts: 2,141
Likes: 0
From: Riverside, So CAL
B20a/B21a Motor Questions (DECK Height Needed)
Here's what I know so far.
B20A,B20A1
(16-Valve, 4 Cylinder, DOHC, PGM-FI)
"Honda" logo in center of valve cover - Filler cap on left side of cover.
Found in:
Serial numbers 1000001~, 1500001~ and 1550001~
1985-1986 Honda Prelude Non-U.S.
1985-1986 Honda Accord Non-U.S.
1985-1986 Honda Vigor Non-U.S.
Serial numbers 1600001~ and 1640001~
1987-1989 Honda Prelude jdm only -non u.s. b-20a5
1987-1989 Honda Vigor Non-U.S.
Displacement: 1958 cc
bore: 81 mm (3.2 in)
stroke: 95 mm (3.7 in)
Compression: 9.4:1; 9.5:1
Power:
(JDM GOLD TOP B20A 1986-1987) 160 hp (119 kW) @ 6300 rpm & 186 N·m @ 4000 rpm, using PH3 ECU
(JDM BLACKTOP B20A 1988-1989) 145 hp (108 kW) @ 6300 rpm & 186 N·m @ 4000 rpm, using PH3 ECU
(EDM, B20A1 Gold Top) 137 hp (102 kW) @ 6000 rpm & 172 N·m @ 4000 rpm, using PJ5(602,603,752),PJ7,PH3 ECU w vac. advance
Transmission: B2K5, F2K5
B21A1
(16-valve, DOHC, PGM-FI)
Found in:
1990-1991 Honda Prelude SI USDM
1990-1991 Honda Prelude SR Canadian Market
Power: 140 hp (104 kW) @5800 rpm
Torque: 135 lb·ft (183 N·m) @5000 rpm
Engine cc: 2056.03
Cylinder cc: 514.0075
Deck cc: 10.191
Head cc: 51.0
Compression Ratio: 9.4:1
Can anyone tell me IF this crankshaft will fit in a B18 motor and what the deck height of this motor is...
B20A,B20A1
(16-Valve, 4 Cylinder, DOHC, PGM-FI)
"Honda" logo in center of valve cover - Filler cap on left side of cover.
Found in:
Serial numbers 1000001~, 1500001~ and 1550001~
1985-1986 Honda Prelude Non-U.S.
1985-1986 Honda Accord Non-U.S.
1985-1986 Honda Vigor Non-U.S.
Serial numbers 1600001~ and 1640001~
1987-1989 Honda Prelude jdm only -non u.s. b-20a5
1987-1989 Honda Vigor Non-U.S.
Displacement: 1958 cc
bore: 81 mm (3.2 in)
stroke: 95 mm (3.7 in)
Compression: 9.4:1; 9.5:1
Power:
(JDM GOLD TOP B20A 1986-1987) 160 hp (119 kW) @ 6300 rpm & 186 N·m @ 4000 rpm, using PH3 ECU
(JDM BLACKTOP B20A 1988-1989) 145 hp (108 kW) @ 6300 rpm & 186 N·m @ 4000 rpm, using PH3 ECU
(EDM, B20A1 Gold Top) 137 hp (102 kW) @ 6000 rpm & 172 N·m @ 4000 rpm, using PJ5(602,603,752),PJ7,PH3 ECU w vac. advance
Transmission: B2K5, F2K5
B21A1
(16-valve, DOHC, PGM-FI)
Found in:
1990-1991 Honda Prelude SI USDM
1990-1991 Honda Prelude SR Canadian Market
Power: 140 hp (104 kW) @5800 rpm
Torque: 135 lb·ft (183 N·m) @5000 rpm
Engine cc: 2056.03
Cylinder cc: 514.0075
Deck cc: 10.191
Head cc: 51.0
Compression Ratio: 9.4:1
Can anyone tell me IF this crankshaft will fit in a B18 motor and what the deck height of this motor is...
Honda-Tech Member
Joined: Mar 2003
Posts: 3,333
Likes: 0
From: Hudson, NH, 03051
Re: B20a/B21a Motor Questions (Extradition)
You can use a b21 crank in a b18 block.The thrust bearing is on a different main.I have heard people using a Jeep thrust bearing.The snout is different in the oil pump area to that needs some modification.Some people claim they are weaker than other b cranks and have cracked them.There is some info in the archives.
Thread
Thread Starter
Forum
Replies
Last Post
