F-Body Lover

who makes them? a friend of mine got an LX with LS7 his fastest E.T is 9.51 the LS7 got hydraulic cam cant remember the specs only the LSA is 113 and now we want to go with solid roller cam with nasty numbers,his set up is LS7 with over bored pistons and 2 valve relifes,stock LS7 heads only been milled and GMPP intake manifold and 950 carb,TH350 and 5000stall,stock 8.8 with spool and 3.73 on 26" tires and the car has race weight and we might port the heads to full race port what solid roller cam do you suggest? the car runs on C14 and might change to E85 if Necessary BTW the car is N/A

Shawn @ VA Speed

iTrader: (3)

the factory ls7 heads generally don't hold up to the high spring pressures needed for a solid roller cam.My first suggestion would be to buy some aftermarket heads that will accept a much bigger spring

Stang's Bane

iTrader: (22)

This=Truth.

It is a crapshoot at best.

Gordon0652

iTrader: (4)

Don't hold up? How? Little more explaining please. Studs for the rockers and I do not see much problem...

Jimbo1367

I am guessing the spring seats.

99LS6SS

iTrader: (4)

I've heard is something like the material around and under the spring cup is too thin. Don't hold me to it though

Shawn @ VA Speed

iTrader: (3)

the castings are really thin at the spring seat,also incredibly thin at the rocker pedestal.Seen more than my share break in these 2 areas.

Gordon0652

iTrader: (4)

Well that's going to suck for me... Hope it does not fail on me.

Pwebbz28

iTrader: (31)

It's not that it won't woke it's that it's not reliable. By the time you cut the spring seat big enough you start getting extremely thin above the intake port entrance. It helps if you use a longer valve so you don't have to cut as deep to get the correct install height. It even has to be done on some aftermarket castings as well.

ringram

Are the new as cast lsx heads any better in that respect?
Or are ALLPro's required? Or maybe the Mast/ETP LS7 stuff?

racer7088

I have some new street high rpm roller springs that will work with light valves and the right lobes but you would need good adjustable rockers.

racer7088

The aftermarket heads like those can run a real hardcore roller spring whereas the true OEM LS7 heads are not that strong there.

Just depends on how far you are trying to go. Shawn is right that for a really crazy solid roller deal the OEM LS7 heads are just not made for that.

My deal is for a street roller that is smoother and slower and doesn't need as much spring pressure similar to the hydraulic roller stuff we can do turning 7500+ rpm.

We've had the same stuff in smaller solid roller cams turning 8000 rpm with no trouble with the right lobes and rockers and springs etc.