Quote:
Originally Posted by Myself
I put the Comp Extreme Energy 268 in my wife's truck, and I will agree with all the above. BUT, it SHOULD be used with upgraded valve springs and increased stall converter as the duration, and lift are considerably more than stock.
|
That would be true for the Xtreme Energy 268 (XE268H) like you mentioned, but we (at least I) was refering to the High Energy 268 (268H). The 268H works fine with the stock converter, springs, etc. The XE268H calls for a Stock-2500 rpm converter.
Valve lift on the XE268H is .477"/.480"
Valve lift on the 268H is .454"/.454"