Im curious to is the highest safe rpm capable of the stock cylinder heads on an 05 de non rev up good for before you get valve float or other problems. I was looking at raising the rpm to 8k when i do my rebuild but i was curious for all the mods necessary to do this for a twin tutbo build or if there's really any point to it, vs a standered forged internal. build

 

Contact JWT or Brian Crower

 

if your not getting cams its dumb since the power drops off, the cams arnt designed to rev to 8000 and still make power. if your upgrading the cams then the stock isnt strong enough and should be pretty obvious. of course all that has been covered before.

 

7200.

 

Sure it isn't ideal without upgraded cams, but you can raise boost where stock cams starts to fall and still keep decent torque and power up to the new higher red line.