[BaggerDad]

What is stock valve spring pressure in 02-04 heads.

What is an upgraded valve spring pressure recommendation for mild cams like the TW26/TW37?

FWIW - Valve Spring pressure reading from Crane Cams
http://www.cranecams.com/?show=valveSpringsFAQ

 

[HDMD88]

What is stock valve spring pressure in 02-04 heads.

What is an upgraded valve spring pressure recommendation for mild cams like the TW26/TW37?

FWIW - Valve Spring pressure reading from Crane Cams
http://www.cranecams.com/?show=valveSpringsFAQ

Right around 140 to 150 lbs at 1.8 installed height