Post by: cvo1717 on September 14, 2017, 08:23:43 PM
Post by: Mainecat on November 07, 2017, 09:35:28 PM
Post by: GMR-PERFORMANCE on November 08, 2017, 12:46:36 PM
Post by: skippy on December 28, 2017, 06:14:49 PM
Post by: ultrafxr on December 29, 2017, 03:07:18 PM
Look at the article that T Man posted on Facebook about leak down on the new M8 heads very interesting or may I say scary....Yeah. Saw that. Dislodged exhaust valve seat caused piston to smack valve on my ‘07 at 22k. Shut me down 300 mikes from home on a cold November day. We were returning from a CVO GTG at Copperhead Lodge. Not a fun time. Sure hope this is not. Widespread problem on the M8s.
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Post by: MCE on January 25, 2018, 08:35:48 AM
Stock head is good for at least 124 Hp stock T/b start to me a limiting factor at that point . Just using peak numbers as a point not saying that one would not work over the other.
The factory valve job leaves allot on the table (Like all their other heads). A better seat profile adds a fair amount.
Post by: TorqueInc on February 14, 2018, 08:40:53 AM
Don't need to CNC these things.....bout and hour tops and gains show up everywhere..... without adding anything to speak of in port volume
Post by: Unbalanced on February 15, 2018, 06:23:09 PM
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