ZR-1 Net Registry Forums - View Single Post - What is the largest CI that LT5 can be built to with stock crank?

Pete · 12-03-2009

Guys i'm no engine builder/expert.

I would say stock crank offset to 3.75 with 4.125 bore makes 401.
i know this will work very well.

I also know stock crank can be offset to 3.85 but i don't know much about 1.900 rods,this will make a 411ci.

I hear different stories on the 1.900 rods they work fine in a 9k RPM Honda some say LT5 parts are heavier so it won't work.

Flyan Ryan might have more input on the 1.900 rods durability.

Pete

P.S.
My choice is 401 should get around 500rwhp w/stock cams cost is about a 1/3 of a 415ci. for the do it yourselfer.

12-03-2009	#4
Pete Join Date: Dec 2003 Location: Chicagoland,IL Posts: 2,667	Re: What is the largest CI that LT5 can be built to with stock crank? Guys i'm no engine builder/expert. I would say stock crank offset to 3.75 with 4.125 bore makes 401. i know this will work very well. I also know stock crank can be offset to 3.85 but i don't know much about 1.900 rods,this will make a 411ci. I hear different stories on the 1.900 rods they work fine in a 9k RPM Honda some say LT5 parts are heavier so it won't work. Flyan Ryan might have more input on the 1.900 rods durability. Pete P.S. My choice is 401 should get around 500rwhp w/stock cams cost is about a 1/3 of a 415ci. for the do it yourselfer. __________________ '91 #1635 PoloGreen 350 LT5 11.09 @ 129.27 11.04 @ 128.86 474RWHP 400RWTQ http://www.youtube.com/watch?v=SFNFOhGGlR4 http://www.youtube.com/watch?v=ZlRIOMwaDYY https://sites.google.com/site/peteszr1garage