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PV, 120 (Amazon), 1800 General Forum for the Volvo PV, 120 and 1800 cars |
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Porting Single Carb ManifoldViews : 1976 Replies : 29Users Viewing This Thread : |
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Jul 26th, 2021, 09:50 | #1 |
Chief Bodger
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Porting Single Carb Manifold
Anyone done any good flow mods on the single carb cast iron manifold?
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Jul 26th, 2021, 10:40 | #2 |
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I don't think you would get any benefit as the manifold has very generously sized branches anyway ...
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Jul 26th, 2021, 11:03 | #3 |
Chief Bodger
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Thanks. Goals have mainly been trying to increase low to mid torque so assume that's more input velocity so improving any corners, casting defects etc but not really sure if there is much or anything to gain.
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Jul 26th, 2021, 12:05 | #4 |
marches on his stomach
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In the wheezy world of series 2 Land Rovers small improvements like that were often done before the fad of replacing with more modern engines became the norm...
...in a situation where you enjoy playing I say "why not"? [You'd probably see better benfits in economy from buying energy saving tyres however - I'm guess you're not being a speed demon when asking such questions]
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1961 Volvo PV544 the quick and easy in between project(!) 1981 Mercedes 300D <=> 230 diesel to petrol conversion project 1965 Series 2a Station Wagon mega build 1992 Mercedes 190E The car that works! |
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Jul 26th, 2021, 12:53 | #5 | |
Chief Bodger
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Quote:
I normally just cruise around but do enjoy giving it a bit of a squirt every now and then. Surprised a few cars when out testing the last couple of weekends. 😁
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One day I will get rid of all of the rust. Last edited by Burdekin; Jul 26th, 2021 at 12:55. |
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Jul 26th, 2021, 13:08 | #6 | |
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If you do have a play I for one will be interested to hear how you get on. The B20 in my PV has a Weber carb and a matching manifold that was apparently a good period upgrade. I've just got a larger bore exhaust to match. I've got a feeling this will just change the sound though - it is meant to copy the Abarth design - we'll see,,,
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1961 Volvo PV544 the quick and easy in between project(!) 1981 Mercedes 300D <=> 230 diesel to petrol conversion project 1965 Series 2a Station Wagon mega build 1992 Mercedes 190E The car that works! |
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Jul 26th, 2021, 13:23 | #7 | |
Chief Bodger
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I have the two inch exhaust fitted, think it made a little difference.
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Jul 26th, 2021, 14:01 | #8 |
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This article is not for Volvo, and it is not for an intake, but it might give you some ideas.
http://www.diyporting.com/thread.html |
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Jul 26th, 2021, 15:05 | #9 |
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But if you increase the inlet port sizes you SLOW the air flow , small is better for torque ... a little turbocharger would achieve what you are looking for :-)
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Jul 26th, 2021, 15:25 | #10 | |
Chief Bodger
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The same design of stub stack I added to the carb intake was flow tested by David Vizard and it increased flow by 5.8%. It did this by having a large radius and eliminating the sharp edge. So that's the sort of thing maybe could be done inside the intake, giving the air an easier path. I'm looking at a supercharger for another project but this one is staying original, or looking original.
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