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Volvo RWD 140-160 Forum

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B20 Cylinder Heads. 140-160 1971

posted by  B20Paul. on  Wed Nov 10 20:39 CST 2021
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last visit: Mon Oct 20 10:54 CST 2014
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I did, but I am in Australia.

You don't need a ported head with a DGV Carburettor, it's already a choke point on a stock B18B. The DFV/DGV is 100BHP maximum. I would bypass the 38 DGES Carb & go to a 350 or 500cfm Holley with PV restrictors, provided you have a decent manifold.

What head do you currently have? The LATE B20 A/B/E/F heads have an improved exhaust port that needs a very precise SSR job that takes skill.

With a DFV/DGV style carburettor & D cam, all you need is a B20E/F exhaust system or better, they are 2.125", an eighth of an inch bigger, which is 13% more flow then the 2" system seen on B20A/B powered 140's. Volvo would not have spent the money unless they had too.

DO NOT BUY HEADERS ESPECIALLY the crappy 4-1 Simmons ones IPD use to sell. DO NOT BUY VPD ANYTHING.

Cheers,
Paul.





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New B20 Intake Manifolds [140-160][1971]
posted by  Mcloud  on Sat Nov 6 11:24 CST 2021 >


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