SD1 v Range Rover 3.5 Efi Heads

TVRTASMIN · Post by **TVRTASMIN** » Fri Jul 27, 2007 9:48 pm

Is there anything special about SD1 heads as opposed to Range Rover 3.5 injection heads.

Cheers

Post by **katanaman** » Fri Jul 27, 2007 10:19 pm

RR injection heads will have the higher flowing wasted stem valves but only the SD1 vitese has them. The injection heads have a small slot in the top of the inlet runner as well so the fuel spray has more room. Its really as much as makes no diff but will be worth a couple of BHP. Of course you could put the efi valves in the older heads, quick round file to the inlet and they would be the same.