[v12-engine] He Head replacement/ HE RPM limit

V12-Engine
1

I remember seeing something about HE heads not flowing very well
at high rpm, thus not good for engines required/wanting to spin
very high. Assuming a suitable camshaft, what’s the effective
rpm limit?

Otherwise,are pre-He heads a direct bolt on to an HE block?

Thanks.–
lexis
yakima, wa, United States
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2

Assuming a suitable camshaft, what’s the effective
rpm limit?

I’m sure there’s more qualified people on this list to answer this,
but AFAIK it’s something like 8,500 for both pre-HE and HE. The
problem has more to do with the ignition (which simply can’t keep up
in standard form) than flow.

Otherwise,are pre-He heads a direct bolt on to an HE block?

If you don’t mind Diesel like CR rates…;)–
Arnoud

iMac, therefore I am

1973 Daimler Double-Six SWB
1989 Jaguar Sovereign HE

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