If you were upgrading your timing chain on your LT1 OEM motor, and were only going to turn 6400rpm occasionally, would a OEM LT4 timing chian and gears be good enough.
I may be coming across one for free, and due to family life, it may be a viable option. ALso, I cant use a electric water pump due to my engine compartment and suspension mods, so I need to use mechanical pump and OEM style chains, ie LT1/LT4 or ED if cheap.

 

From your username I'm guessing you have a 93 Vette. If so you will need the later optispark and all that goes with it to use an LT4 chain.

 

LT4 should work fine as long as its not loose. I didnt know that you need a vented opti to run an LT4 chain.

Just wondering why you cant run an electric pump. Thats the way I would go, but maybe there is something I am missing.

 

Are you talking about the LT4 chain, not the LT4 extreme duty?? Is there even a difference? I'll be using the LT4 extreme duty chain on my car, and it's going to see some high RPM/fairly stout valvetrain- I sure hope it's up to the task!

 

I use the LT4 ED in my 7,400rpm 800HP solid roller 381. A buddy of mine used the LT4 ED set in his 1,125HP 8,000rpm 383 w/ 20+# of Vortech boost, 30th SS convertible. I think its fair to say the LT4 ED set is strong.

 

Ok I'm not worried about it at all anymore

 

I've actually "lightened" the cam sprocket, because it seems excessively heavy:

http://members.aol.com/Fredrick518/Photos/newfront.jpg

 

I have a 96 motor in my Vette. I am getting the ED chain, and was looking at reliability issues now, as I read a few guys had messed up there gears on the back of the Big sprocket and WP gear.

 

ttt