Jditlfm

iTrader: (26)

I was just wondering if it was possible for a valve to hit the pistion on a STOCK lt1 if you indexed the the opti wrong or the timming was off for whatever reason. Thanks

-PEPE-

iTrader: (10)

I could be wrong but I don't think so just from your opti indexing, even with incorrect valve lash on the stocker you have plenty of piston to valve clearance.

Jditlfm

iTrader: (26)

Thats what i fugured i knew that DOHC motors have that problem when a timming chain or belts break. Thanks for the info.

slowpoke96z28

iTrader: (2)

if the cam timing is off in reference to the crank, the pistons and valve can smack. but by the time the motor reached that point, it wouldn't even run. i would take a severely stretched/ broken timing chain, sheared/twisted cam gear to cam bolts, or a twisted/broken camshaft(highly unlikely to happen). ignition timing itself will not affect PTV clearance.

96silverram

iTrader: (12)

What is the piston to valve clearance on a stock LT1, just out of curiosity ?

1SLO6

iTrader: (8)

i believe it is possible if u have a big enough cam.....

-PEPE-

iTrader: (10)

Correct, why the PtoV is so important when you build a race engine, you want it right much less having room for growth in cams, different rockers, etc. I want to say the stock lt1s were around 0.50 or so, something like that it's been a long time but I found it somewhere online, might even be in a auto manual what the stock clearance is.