I run 450's in my HTG kitted XCR with out the porting, but I am running blind
not temp gauges. I like runnin a bit on the safer side of jetting, 440's would be to close to lean for me, I am not runnin the tempa-flow either.
If this is a new sled to you I would jet up or call flannery for recomendations and above all do some plug checkin thru the cold months or get an EGT
just to be safe..
Burn Downs SUCK!!
not temp gauges. I like runnin a bit on the safer side of jetting, 440's would be to close to lean for me, I am not runnin the tempa-flow either.
If this is a new sled to you I would jet up or call flannery for recomendations and above all do some plug checkin thru the cold months or get an EGT
just to be safe..
Burn Downs SUCK!!