Looking at rebuilding my b20b. 69 144s 209000 mile receipts show reconditioned engine fitted in 1986 at 136000 mile. Electronic ignition fitted. Have sourced a b20e head to be ported and reconditioned. Will look for a mild cam and fit headers. Can anybody tell me where I might be able to get intake manifold for the SU carbs
B20b rebuild
R sport (copy) headers are made of win. Manifold gasket or a whole manifold? Manifold I have a spare of or @Rob may have one and is closer and gasket is probably easiest from George http://www.volvo1800-120parts.com.au/
A 120 manifold is what you need.
So what I'm looking for is a seperate alloy intake manifold to suit the twin hs6 Su. Is that what the 120 s had ?
120 style?
But you could cut away the intake from the exhaust on the stock style right?
But you could cut away the intake from the exhaust on the stock style right?
Is the 120 style hard to get and what would the cost be ?
Talk to George M for price and availability.
They're not laying around everywhere, but I don't think they're a particularly rare part.
They're not laying around everywhere, but I don't think they're a particularly rare part.
B20E heads had bigger (44mm) valves than early B20B (42mm).
JFYI, CVI lists a 37mm "heavy duty" exhaust valve, while Volvo Competition Service used to offer all of these:
p/n..... details
419766-1 valve, inlet 44 mm, standard valve raw
552813-8 valve, inlet 46 mm, beveled
552816-1 valve, inlet 44 mm, beveled
552823-7 valve, inlet 45 mm, sanded, polished
552834-4 valve, inlet 45 mm, unpolished
552848-4 valve, inlet 44 mm, sanded, polished
419735-6 valve, exhaust 35 mm, standard valve raw
552815-3 valve, exhaust 38 mm, beveled
552817-9 valve, exhaust 35 mm, facade
552824-5 valve, exhaust 38 mm, sanded, polished
552835-1 valve, exhaust 38 mm, raw
552849-2 valve, exhaust 35 mm, sanded, polished
If you can find a K cam, it's mild and it will work quite well on the street (it has more lift than the C cam).
Timing is 27/70/70/27 with 10.8mm lift and a rated duration of 277 degrees.
The R-Sport catalog described the K cam as -
"Original camshaft for B20 GT kit. Made of Wizemann substance. Suitable for moderate output increase [on] standard motors with one or two carburettors. Provides better low speed torque than the standard camshaft on injection engines." (translated from Swedish)
A steel timing gear set is also worth fitting on any B18 /B20 getting a rebuild. Unlike the fibre rubbish, they never fail. Some people say the good gears are noisier - but hey, it's a B20 for cryin' out loud (which it does) and I'm damned if I could ever hear the alleged whine of the good gears in mine over-riding any other noise it normally made.
JFYI, CVI lists a 37mm "heavy duty" exhaust valve, while Volvo Competition Service used to offer all of these:
p/n..... details
419766-1 valve, inlet 44 mm, standard valve raw
552813-8 valve, inlet 46 mm, beveled
552816-1 valve, inlet 44 mm, beveled
552823-7 valve, inlet 45 mm, sanded, polished
552834-4 valve, inlet 45 mm, unpolished
552848-4 valve, inlet 44 mm, sanded, polished
419735-6 valve, exhaust 35 mm, standard valve raw
552815-3 valve, exhaust 38 mm, beveled
552817-9 valve, exhaust 35 mm, facade
552824-5 valve, exhaust 38 mm, sanded, polished
552835-1 valve, exhaust 38 mm, raw
552849-2 valve, exhaust 35 mm, sanded, polished
If you can find a K cam, it's mild and it will work quite well on the street (it has more lift than the C cam).
Timing is 27/70/70/27 with 10.8mm lift and a rated duration of 277 degrees.
The R-Sport catalog described the K cam as -
"Original camshaft for B20 GT kit. Made of Wizemann substance. Suitable for moderate output increase [on] standard motors with one or two carburettors. Provides better low speed torque than the standard camshaft on injection engines." (translated from Swedish)
A steel timing gear set is also worth fitting on any B18 /B20 getting a rebuild. Unlike the fibre rubbish, they never fail. Some people say the good gears are noisier - but hey, it's a B20 for cryin' out loud (which it does) and I'm damned if I could ever hear the alleged whine of the good gears in mine over-riding any other noise it normally made.
9 days later
Bgpz-fm142 thanks for the info. Will look at that cam.