Editing Talk:Vortec L31 cylinder head

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File:Vortec spring measurements.jpg


Does anybody know if these heads are exactly the same as the 1993 and 1994 and higher 4.3l V6 "Vortec" heads?

All the parameters match. The valve sizes 1.94 I vs. 1.50 E, the "ski ramp" swirl on the roof of the intake, the eccentric location of the spark plug hole.

I still have to cc the chambers but it starts to look like these heads are the same. Must be a reason that these engines produce 300 NM torque at only 2'800 rpm in stock trim.

As I'm in the middle of a build it would be great to have that confirmed.

 --[[User:Error 401|Error 401]] 15:25, 18 February 2016 (MST)