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PV, 120 (Amazon), 1800 General Forum for the Volvo PV, 120 and 1800 cars |
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B20A top speedViews : 2333 Replies : 46Users Viewing This Thread : |
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Jun 14th, 2020, 09:33 | #1 |
Chief Bodger
Last Online: Yesterday 23:11
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B20A top speed
What sort of top speed would be expected from a B20A with the M40 gearbox?
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Jun 14th, 2020, 14:10 | #2 |
VOC Member
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Realistically low 90's. Maybe 96 on a good day. I'm sure someone will say that they get over 100 but the original road tests don't say that.
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Jun 14th, 2020, 14:35 | #3 |
Chief Bodger
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Thanks Derek. Something to look into, very much doubt I would get 90.
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Jun 14th, 2020, 15:41 | #4 |
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what rpm are you doing when it wont go any faster?? The twin carbs had an overdrive for a reason:-)
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Jun 14th, 2020, 15:49 | #5 | |
Chief Bodger
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Quote:
I've not as yet wound it out to see what it could do but doesn't have much top end.
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Jun 14th, 2020, 15:54 | #6 | |
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Quote:
If your engine produces its max power at say 5200 rpm and you are already doing that at around 85 mph it won't go any faster except down hill .
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Jun 14th, 2020, 16:15 | #7 |
Chief Bodger
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Doesn't really have much pull above 60 so really wondering would it be capable of winding out to that sort of speed or is their an issue.
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Jun 14th, 2020, 16:20 | #8 |
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there must be an issue , its unlikely to be a worn engine . it should do 70- 90 with little stress , the twin carb B20B would do 115 + mph
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Jun 14th, 2020, 16:42 | #9 |
Chief Bodger
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Thanks. Will go over things. Just pulled the air filter and it's filthy, no idea how long it's been on for. Has a new 123 dizzy, assume has been set up correctly.
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Jun 14th, 2020, 20:21 | #10 |
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To be honest you would be better off with the correct distributor , It will be accurate and more reliable if you use the genuine Bosch Points . The electronic is ok if programmed to the exact timing curve your engine needs and it will go on and on for a while until it fails stranding you . Has it got the vacuum advance unit ? The original Bosch Cap rotor and points were at the time the very best on the market and that's still true if you can find some. If i remember correctly the ignition timing is 17 to 19 degrees Before Top Dead Centre at 1500 rpm , with the vac pipe on the advance unit disconnected .
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