Originally Posted by dawgs74

what if you put ls1 pistons on a 4.8 crank and rods , will it work and what would it displace?

Originally Posted by B52bombardier1

Yea, I know - this is an old thread. The big trouble I see with using these 5.3 liter truck motors in a car is the 5.3 liter oil pan. It hangs down a lot.Typically, maybe two inches or so. Yes, the 5.3 liter engines are abundant and cheap but you do need to budget for a different oil pan. Otherwise, you are going to leave your engine oil on the street someday and quickly weld up the internal parts of your engine into a pasty grey metallic pulp.

I had to go with the Holley 302-2 pan on my El Camino to avoid this problem.

Rick

Originally Posted by B52bombardier1

Yea, I know - this is an old thread. The big trouble I see with using these 5.3 liter truck motors in a car is the 5.3 liter oil pan. It hangs down a lot.Typically, maybe two inches or so. Yes, the 5.3 liter engines are abundant and cheap but you do need to budget for a different oil pan. Otherwise, you are going to leave your engine oil on the street someday and quickly weld up the internal parts of your engine into a pasty grey metallic pulp.

I had to go with the Holley 302-2 pan on my El Camino to avoid this problem.

Rick

Originally Posted by 70TWO NOVA

It worked great, car put down 311 hp to the ground on a chassis dyno through a 4L60E so we think the engine is makeing around 375hp or so.

Originally Posted by bww3588

they will stick out of the hole. the compression depth is different for the shorter stroke of the 5.3

the compression depth of the 4.8 piston is 1.498 and the compression depth of the 5.3 piston is 1.328 ish.

Originally Posted by vannatta20

Try putting the 4.8 pistons on the drivers side then install the 5.3 pistons on the passenger side. This should balance well if my math is correct. Just make sure to mill the head with 5.3 pistons to even out the compression ratio.