Hey guys...
Bought a cam for my lz23 build and was wondering if anyone could tell me if the stock valve springs will be ok....Cheers.

here are the specs
Intake Peak cam lift .38924inch ,PeakValve Lift .57186 inch, lift @TDC .1021 Exhaust Peakcam lift .38945, Peak valve lift .57217, lift @TDC .0965,rocker ratio 1.50, lash .0120. Checking Height 0.050 inch Valve Overlap 28.6 Crank Deg... Intake, Centreline
99.11 atdc,open 13.63 btdc close 51.15abdc duration 244.8 crank deg Exhaust 117.19 btdc, 50.14 bbdc 14.94 atdc,245.1 Crank deg

Hell No!!!!!!!!! YOu need to read up more
I think about .470in lift they start to bind. esp the Outer.

You can cheat by milling the the head where the valve seat washer rest on and lower it to give a less static pressure at rest. but .412is about a SSS/L20 lift


key is the valves seats are cu the same and valves all the same so you can use one size lash pad. anthing cut changes the lash , sometime not by much and can cheat. long as the valve rocker wear is close to the center. a stock uncut head is most base cam specs when giving lash pad requirements. head milling top bottom ect all changes this. I have a stock of various size lash pads just for this issue.

On my head my cam lifts don't exceed 470 so I use a stock inner and Perfromance outer or vise vera what I have on hand. so this don't wear cam out to fast as my motors are daily drivers.

Baz at Datsport can hook you up.

I am reading up on it! That's why I asked! Haha
I've decided my build doesn't breathe anywhere near well enough for this monster, so I've called clive and he thinks a 74' would be best for me. Still need new springs though.
Thanks for your response. Appreciate it.

Ok so banzai i got a re grind from clive cams, a 74'. Lift is .334.
Youre saying thats ok on stock springs?

I would see if Baz chimes in on this Im not familiar with the aussie cams but that about 490 lift.

I don't know what parts are avail there. I would get the recommended stuff that goes with it retainers ect. Being cheap on one part don't make sense if you just trying to save on buying springs. one shoulf get retainers ect.....

My cams are under 480 lift and I run one stock spring and one of the performance springs.
ex, stock outter, Performance Inner or Performance outter and stock inner

.334 cam lift x 1.5 rocker ratio = .501 valve lift. minus your valve clearance is about what banzai said .490 lift. you most likely going to need the correct upgraded springs and id be checking for piston clearance also. im pretty sure if you search there was a thread on this somewhere.