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On 12/05/2019 at 09:22, khanlad said:

A boy can never have enough cossie engines laying around?

You know that big man

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I picked up my new N/A Y/B today, came home had a look in my garage and found RS alloy engine mounts and alternator bracket, and I have bought a set of 48s tonight as well

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Query - what sort of work has gone into the cylinder head to enable 48's or 50's to work, as by all accounts YB heads are the worst for NA airflow even compared to a Pinto? Inlet ports are too small, you can't hog them out due to studs, water / oil passages and not a lot of options for offset &/or larger valves?

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On 13/07/2019 at 08:04, katana said:

Query - what sort of work has gone into the cylinder head to enable 48's or 50's to work, as by all accounts YB heads are the worst for NA airflow even compared to a Pinto? Inlet ports are too small, you can't hog them out due to studs, water / oil passages and not a lot of options for offset &/or larger valves?

Standard they are terrible because they are done for a forced induction, there is enough material in ports to open them up enough so they make great power in N/A form, the new cast heads have even more material so the ports can be enlarged even more, as long as you get an engine tuner that knows what he is doing they make great power, WPE who does my engine has been doing N/A Y/Bs for over 20 years and knows them inside and out

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