I read an article (Cam-O-Rama) in popular Hot Rodding. They built a LT1 and said it was a 377 with a 5.850 inch rod and an Eagle cast crank. I was wondering if this is a standard 4.000 in bore with a stroker crank or what the heck is it? Sorry if this is in the wrong forum. I tried to find it in calculations but no luck.

 

4.155" bore, 3.48" stroke
Gen1 motors used a bored over 400 block and a 350 crank.

 

But you can't bore an LT1 to 4.155. You would have to sleeve it.

4.00 bore x 3.75" stroke = 376.99 CI

 

STD 350 bore (4.00) and 3.75 stroke

 

One of the mags ran side by side tests between a 383 and a 377, built the same, other than the cubes/strokes. It's the old stroke Vs RPM debate rearing its ugly head once again.

The results were predictable, more torque (383) Vs slightly more high RPM HP (377).

I've forgotten what mag I saw it in, but I'm sure I have it around here somewhere.

Jake

West Point ROCKS! Nation's TOP COLLEGE per Forbes Magazine!! Graduation Day Parade 20 May 2010!!!

 

BTW, Bore x Bore x Stroke X .7854 x 8 will let you play with the CID of various combinaions, just in case you don't find a calculator online.

Jake

West Point ROCKS! Nation's TOP COLLEGE per Forbes Magazine!! Graduation Day Parade 20 May 2010!!!

 

Good site for calculating:

http://www.csgnetwork.com/automotiveconverters.html

 

Thanks all. good info

 

they use a dart -little m block..

if i'm not mistaken i seen an article on a 454 smallblock they did a buildup on.

 

Then its not an LT1, because no one makes an aftermarket LT1 block.

 

correct its gen1

 

the 377's ive seen use a smallblock 400 block, with a smallblock 350 crankshaft, they use bearing spacers on the main bearings

 

The OP was asking about an LT1, not a Gen 1.