Just curious if anyone stuck with the stock chain with those kinds of lift#s and valve spring seat pressures. .600 lift and 145lbs seat pressure.
With all the talk of LT4 ED chain failures with the wp gears, just curious what the limits are of the stocker......

 

any takers? Just wondering what the real limits are..if anyone runs one with these kinds of pressures.

 

I'm running the stock chain but I deleted the h20 pump with a Miezre.the seat pressure isn't all that bad what is your open pressure. Mine is just over 400 open pressure

 

if you have an e-wp a small block double roller is like 80 bucks, why not.

 

I'm not running an electric pump, just inquiring as I've never heard of the stock timing gear and wp gear getting chewed up as much as the LT4 ED set, but chances are this is happening because of tight bearings on replacement wp as alot of folks change that while they are in there, or maybe clogged oiler holes in the front galley plugs.

I've got an LT4 ED set now, with about 10k miles on it, will be going in for a cam swap again and evaluate if the LT4 set is still good or not then.

My open pressures won't be quit to 400# so your running more pressure than I would be.

 

I'm running a stock chain with .568 lift and about 375 open pressure. No problems in 2 years. I spin to 6800 rpm.................... often.

 

How do the spring pressures and cam lift affect the timing chain? I figured all of that pressure was supported by the cam bearings.

I thought it was more RPM and crank HP that killed timing chains.

 

In order for the cam lobe to "lift" the lifter/valve, it has to go against the valve spring force...the stronger the spring, the more torsional force it takes to rotate the cam...thus the timing chain/set takes the brunt of that force.