waddisme

Annual valve spring repl is a given for me now with current cam. Motor is mostly apart from broken valve spring, so it would not be a big step to change cam now. Just curious if it would be worth changing cam from the MS3 237/242 603"/609" to something a little more spring friendly. Car sees about 20-25 hrs a yr on the track and dd the rest of the time. With that many hours a year, seems like I would be changing springs anyway so nothing really gained? I probably could get a better matched up cam for heads but don't really need any more power.

Current dyno:

[IMG][/IMG]

Thoughts?

AU N EGL

Go to a lower lift cam to save on valve spring life.

torque II would be the highest lift but that may even be too much.

232/ 234 595/598 112

the old GM Cup cam

GM- Grand am cup 88958606 239/251 570/570 106

a crane road race cam
218/224 585/585 110+3 Torque monster


reverse split,

LG
G5X1 228/232 588/574 112 also a torque monster

Good Luck

briannutter1

The lift really isn't the killer and it would be a shame to loose the power and torque if there were other options. If you get some good springs and shim them to a bit less than .050 out of coil bind to reduce surge. Also, running spring "irrigation" oil tubes inside the valve covers can double spring life based on some marine racing engines i was involved with. I don't know who offers the covers complete, but Bo Laws used to do conversions.

waddisme

From what threads I have run across this past summer, springs in frequently tracked cars should be changed annually anyway? If that is the case, I feel confident I can get a year out of springs and will stay with cam. But if running a smaller cam will last get 3-4 yrs from springs, then I will change cam now.

I found an email where I discussed mine with place that does my engine work back in the summer. I am just mad at myself when it started messing up that I didn't take 15 min to look under valve cover. Did a full track day at VIR with the broken valve spring..

RX-Ben

Are you running TFS standard stainless valves? Your redline is 6800?
It is hard to argue with 4 years and a bunch of track days vs the conventional wisdom that the cam is too big. Everyone is worried about running a cam that big but maybe it isn't such a big deal. Hard to tell with a sample size of 1.

AU N EGL

if your maintaining your engine, it wont matter much.

4000 to redline all the time, is hard on the valve train.

neilvosko

any idea where to order the

crane road race cam
218/224 585/585 110+3 Torque monster

waddisme

http://forums.corvetteforum.com/c5-p...-lsx-sale.html