Thread: VS Cam Ideas

PRJ tune, E85 will be added, as well as ported heads. Why the 105s? And ditch the t stat as well as 103? I ask because that is what Paul suggested when I did the the build and came down to tune it.

Originally Posted by nik12937

The 105's would work better because like the 90# springs, they still support the lift of the VS cam and won't allow any valve float, but have a lower spring rate and won't wear your timing chain and tensioner as quickly as the 90's.

A 160 degree t-stat doesn't really help reduce KR any more than a 180 unless you're doing one EXTREME build, the 180 will work just as well and keep the motor closer to its original operating temp, helping it to burn fuel more efficiently. Same idea with switching to a warmer plug, unless the 103's give you a huge KR reduction, you'll most likely get more efficient combustion with the 104's, which can also translate to more power since more fuel is being utilized.

But does it hurt to have a 160 t stat? I ask because it does get hot here when it does. So that is why Paul suggested that as well as the 103s.
I do get about 1* of KR but he didn't due the best tune due to the tranny slipping when he did it, what I do know is that it was left with 15* of timmimg.