if u have installed a cam lately - Page 8 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

thahemp · 05-04-2013, 01:10 PM

Quote:

Originally Posted by willhe64

I've seen it before, many times. A batch of soft cams. Comp should recall the lot. Sounds like they are quietly replacing them.

Spring pressure is there primarily to make the roller follow the lobe on the down ramp. The profile on the down ramp is there to close the valve as late and as gently as possible. They have no problem following the up ramp all the way to TDC.

I blew an engine from valve float.The valve was slamming into the seat and it popped the head of the valve right off the stem. Punched the valve head through the cylinder head and then filled the cylinder with water, stopping it dead at 6800 rpm. Entire engine gone, all the rods chucked out the block.

Impressive! I bet that wasn't one of your happiest days.

So how does one catch a soft cam before installing it? I'm not in the market currently, but I don't want to have to monitor cam wear like you would have to with these examples. I guess one would just have to listen carefully for new noises up front.

Bo White · 05-04-2013, 01:33 PM

If someone wants the added insurance just send the cam off to be cryo treated.

thahemp · 05-04-2013, 01:39 PM

Quote:

Originally Posted by Bo White

If someone wants the added insurance just send the cam off to be cryo treated.

That is surprisingly cheap insurance. Looks like $75 can buy some peace of mind.

thahemp · 05-04-2013, 01:44 PM

Actually.. from that same site.

"Cryogenic processing is not a fix for bad heat treating. Although it will cause retained austenite to transform to martensite, so will cold treating at -140oF. It will not cure the other ills of bad heat treat."

litle88 · 05-04-2013, 02:18 PM

Damn dekan!
Feel sorry for you guys down there right now man, Damian has always been very informational on tech and straight up!
That mafia link daaaaaamn! I feel sorry for Matt he's a cool azz guy with what Nick from Straightline tells me and what I see here on the board along with his work.

I'm usually on the gen 4 section and haven't been in the gen 3 but until the tech thread you shared. Lol yellow bullit has one too lol

05-04-2013, 01:33 PM	#100
Bo White Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012 Location: Vance Alabama Posts: 8,094	If someone wants the added insurance just send the cam off to be cryo treated. __________________ Retired wanna be cylinder head porter 2015 2SS 1LE Clutch reservoir, Vararam DRX, ported TB, TSP 2" headers, MGW shifter, stage 4 cam and Wilkes 11° 65cc heads Totalled: 2010 1SS Wilkes Performance/Eagle 416 shortblock, TSP custom valvetrain, PRC 260 heads, Edelbrock Pro Flo 102, th400 swap, 8" PTC 5500 stall= 535/435 at the wheels tuned Gen 3 Performance and Dyno 10.97 @ 124 full weight in 3100 DA CamaroFest X

05-04-2013, 01:44 PM	#102
thahemp Geek Drives: 2012 Black LS3 Join Date: Jan 2012 Location: Derby, KS Posts: 4,343 View My Garage	Actually.. from that same site. "Cryogenic processing is not a fix for bad heat treating. Although it will cause retained austenite to transform to martensite, so will cold treating at -140oF. It will not cure the other ills of bad heat treat." __________________ 01000111011011110110111101100100001000000110110001 11010101100011011010110010000001110111011010010111 01000110100000100000011101000110100001101001011100 110010000001101111011011100110010100100001 x = ac97968bd3df8f968c8cd3df998a9c94d3df9c8a918bd3df9c 909c94df8c8a9c949a8dd3df92908b979a8ddf998a9c949a8d d3df8b968b8cd1 x = ~x

05-04-2013, 02:18 PM	#103
litle88 V8 Lounge member #2 Drives: 2001 Ws6 Join Date: Sep 2009 Location: Burbank,IL Posts: 6,373	Damn dekan! Feel sorry for you guys down there right now man, Damian has always been very informational on tech and straight up! That mafia link daaaaaamn! I feel sorry for Matt he's a cool azz guy with what Nick from Straightline tells me and what I see here on the board along with his work. I'm usually on the gen 4 section and haven't been in the gen 3 but until the tech thread you shared. Lol yellow bullit has one too lol __________________ 2001 ws6, 40k miles, Ls3 416 stroker, short block built by PER the rest by me. LPE Ls3 heads milled to 12-1 comp, FAST 102, NW 102, kooks 2", dual DMH cutouts, Magnaflow C/B, BTR cam + springs. Full UMI suspension.