VetteFish

If it goes as well as it should, we will be having another airstrip event in fall.

Mopar Jimmy

Ryne

Great results bro and love that flat torque line, you can lay a beer on top of it.

Congrats Vettefish!

0Cunningham Motorsports

thank you... i put alot of thought into this camshaft choice.... looking for a very mild yet reliable and effective combo

ca02z06

Man I wish I wouldn't have waited so long to pull the trigger on a cam swap. Now they can't fit me in! I'm sure being the top shop around keeps you busy.

Maybe we can see how bad a 390whp c5z gets pulled on at the airstrip.

X25

Considering it now has the heavier stainless steel exhaust valves, did you lower the max RPM to 6500s? The dyno chart shows full 7000 RPMs. After all, there is a reason why GM had to use titanium there, even though it has issues of its own at its welding point.

BearZ06

Not doubting Katech's results but though many solid ss valves have been installed no one has complained of rpm loss??

X25

You won't 'lose' RPMs, you can still run it, but it should not be as safe as it used to be to run high RPMs considering the valves are considerably heavier.

I read somewhere that said GM tested LS7 doing 8000 RPMs for 24 hours during a stress test, so LS7 can definitely rev

I've also heard that Katech is one of the best in the market for durable engine builds. I'm sure LS7 with stainless steel valves can still crank 7000 RPMs, but I wonder how safe it is in the long term, especially if you also have a cam, etc. that might add to the stress. I'd personally not crank it past 6500 RPM if it were my investment.

edmundu

But along with the heavier valve, you generally also use lighter locks/retainers, which help reduce the weight differential, not to mention that the new springs are also considerably heftier.

But ideally keeping the valvetrain as light as possible is always better in the end...

VetteFish

Here's a quick start up and idle clip. I know it's not the best because 1) it is by cell phone and 2) it is in my buildings parking garage. But it gives you an idea, I'll post more clips soon though but this should hold you guys over.

jimbob8915

How much does a set of stock sodium filled ex valves cost? I am beginning to believe that the valves are not at fault but poor machining. I would be interested in a head rebuild with new stock valves with bronze guides an a new valves seat cut.

Dirty Howie

Scary Nice ...............


DH

0Cunningham Motorsports

the factory exhaust valve is a hollow stem stainless valve, not titanium.. the intake valve is still the factory titanium piece... the weight difference between the factory exhaust valve and the solid stainless piece is negligible, in addition the valve spring pressure is substantial higher then factory as well..

0Cunningham Motorsports

let me know when your ready howard!!

0Myhardtop

Well said homie

Very nice results; I'm digging your style and approach

Thanks,
Carlos

0Cunningham Motorsports

thanks carlos, means alot to get respect from another well respected builder/tuner.... PS i put my ls7 back together and measured PTV right at .100" on the exhaust lol!

0Myhardtop

You're welcome amigo.

To me, helping out each other is what is all about

I'm a sponge for new knowledge from any angles

Thanks,
Carlos

0Cunningham Motorsports

i like spreading the knowledge, there are alot of fish in the sea, i cant work on or tune every vette out there, sharing info makes the industry even better, moves development along even further....

548chevelle

What's the cam specs?

0Cunningham Motorsports

if you order the cam i will give you the specs

SoCA04V

It surprises me that someone would ask for specs after a tuner outlines that a lot of time and thought went into picking the right specs. There is truly an art to speccing a cam appropriately, and that's why there aren't many good true performance shops that can build and tune something specific for your needs.

Keep up the good work Ryne.