transam360

iTrader: (-1)

here is the cam specs i also am running a 1.8 rocker so it will move the lift up I just need to know what valve springs i need to get with this cam and rocker setup thanks Basic Operating RPM Range: 1,500-6,500 Intake Duration at 050 inch Lift: 240 Exhaust Duration at 050 inch Lift: 246 Duration at 050 inch Lift: 240 int./246 exh. Advertised Intake Duration: 300 Advertised Exhaust Duration: 306 Advertised Duration: 300 int./306 exh. Intake Valve Lift with Factory Rocker Arm Ratio: 0.560 in. Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.573 in. Valve Lift with Factory Rocker Arm Ratio: 0.560 int./0.573 exh. lift Lobe Separation (degrees): 112

sofakingdom

iTrader: (1)

I'm assuming this is a hydraulic flat tappet...

Comp 924, set up at 1.850" would work well

Damon

Do you mean 1.6 rockers? 1.8s on a small block aren't something I've run into.

five7kid

iTrader: (14)

It's a BBC.

transam360

iTrader: (-1)

yes it is hydraulic flat tappet and it is a big block and du u have any part numbers on them comp springs.

sofakingdom

iTrader: (1)

don't forget to get the right retainers, keepers, and maybe some shims.

transam360

iTrader: (-1)

would it be better to just buy the springs and have a shop shim them and put them in.

327_TPI_77_Maro

iTrader: (8)

If you don't have the tool to measure installed spring height, yeah have a shop do it. Or buy the tool and do it yourself, since you'll likely use it again in the future.

transam360

iTrader: (-1)

what is the tool i need to buy to measure the springs i just got the springs in the mail today

88bracketT/A

A valve spring height micrometer like this one:

http://www.jegs.com/webapp/wcs/store...53947_-1_10783

transam360

iTrader: (-1)

thanks

Damon

Ah, big block, that would explain it.

When you go to break in that cam please remember to use a can of GM EOS in the oil. Modern (street/EPA-approved) oils don't have the good stuff in them any more that a flat tappet cam needs. The 1.8 rockers only make things harder on the cam and lifters vs. stock ratio 1.7s. You don't want to risk wiping the cam.

Using "racing" (non-highway approved) oils is another alternative- they do and always did have the "good stuff" in them for flat tappet cams. But typically they're only available in 20W50 weight.

I am screwing together a 454 right now with a similar Comp 282S flat tappet solid cam and I stayed with stock ratio (1.7) rockers for various reasons including it being easier on the cam and lifters for a street driver. Mine will definitely have a can of GM EOS in the oil before I turn the key the first time.

transam360

iTrader: (-1)

is the only reason they took that stuff out of the oil is because the changed over to roller everything or is there another reason

327_TPI_77_Maro

iTrader: (8)

zinc kills catalytics. Since cats have to be warrantied for 100k miles, and it isn't necessary in high concentrations w/ roller motors, it is being phased out. I just installed and test drove a Comp 0.503/0.510" hyd roller, and I just used assembly lube on it, regular Castrol GTX 10w40 conventional oil, fired the motor, and off I went. A roller doesn't need to be broken in like the flat tappet stuff, just plug and play and go.

transam360

iTrader: (-1)

im kinda wishin i went roller now GOD!!!!!! lol

five7kid

iTrader: (14)

I'm using AMSOIL Series 3000 5W-30 synthetic heavy duty diesel oil in my 396. Has the antiwear additives, and is gasoline rated.

FWIW, AMSOIL says any of their gasoline rated oils are fine for flat tappets, even the GF-4 with the reduced zinc & phosphorus. But, I'm taking the extra step and using the diesel oil, anyway. It also has a higher total base number for extra corrosion protection - nice for engines that see intermittent use and long storage.

transam360

iTrader: (-1)

Post new upgrade took the hyd cam back and bought a bigger solid cam here is the specs on the cam

http://compcams.com/Technical/Search...umber=11-220-4