single hi revs valve springs with turbo

[sidemarkers]

Ended up using my dual springs and shimmed them for lower pressure, thanks for all your input.

[sidemarkers]

valve springs are working great, they are quieter than they used to be too.

[kangaboy]

Soooo, what are the limits of single stock valve springs with a turbo? Everything is stock except the C25 cam, and it will only rev to 5000'ish rpm.

[Chip Birks]

You'll probably be lucky to get a controlled 5k limit once you throw boost at it.

[sidemarkers]

if memory recalls stock engines bounce valves at 4600 rpm

[Clonebug]

I'm running HD singles up to 5400 rpm and 22 lbs boost at .420" lift.
I haven't noticed any valve float issues in over two years now.

[Steve Arndt]

Soooo, what are the limits of single stock valve springs with a turbo? Everything is stock except the C25 cam, and it will only rev to 5000'ish rpm.

First thing to fail is stock spring clip rocker shafts. Solid shaft spacers fix that. Next thing is stock springs floating. So then if you go to HD singles then your stock pushrods will fail. It is a nice chain of events.

[Clonebug]

I just noticed I'm starting to repeat myself.........I must be gettin old....