difference between 2000 5.3 liter and 1997 5.7 liter engine

[The Ladies Man]

i was wondering acually what the difference was between these two engines? i heard they had the same piston size just the 5.3 liter had a shorter stroke. is this true. thanks for any help.

[Sonny01]

I heard that the 5.3 litre was a remake of the 327 design. The math comes out to 325.4 cubic inches. The 5.3 has more torque and horsepower. The heads are some of the best produced by Chevy and are very good at producing power. When people talk about increasing the horse power it's all about add-ons, about the only thing you would want to change in the engine is the cam and items in the valve train. Myself, I am very pleased with my 2000 5.3...I just wish GM would have paid more attention to the rest of the truck. Wind noises, clunks, brake problems, door troubles, etc, etc, etc. It's still a great truck though...it just needs more attention then other brands.
Sonny

[The Ladies Man]

oh i have no problems with my hp at all i am very pleased. i just heard that they were basically the same motors just the 5.3 had a shorter stroke and that the heads had i think higher compression. the reason i am asking this question is because my buddy has the 97 5.7 and i think it is an ls1. there for the parts should be interchangable. ls1 and ls1, and he said their not. the same. so i want other opinions

[juma33]

if your buddy's 5.7 is in a truck or van, it is the old style small-block and nothing is interchangeable with the ls1 style motor. juma!

[jerrylittle]

Originally Posted by Sonny01

I heard that the 5.3 litre was a remake of the 327 design. The math comes out to 325.4 cubic inches. The 5.3 has more torque and horsepower. The heads are some of the best produced by Chevy and are very good at producing power. When people talk about increasing the horse power it's all about add-ons, about the only thing you would want to change in the engine is the cam and items in the valve train. Myself, I am very pleased with my 2000 5.3...I just wish GM would have paid more attention to the rest of the truck. Wind noises, clunks, brake problems, door troubles, etc, etc, etc. It's still a great truck though...it just needs more attention then other brands.
Sonny

I must say that your mistaken. My friend has a 5.3 2001 and I have a 5.7 98 mine by book puts out 5lbs more torque his puts out more horse power and the 5.3 is faster. As for torque sorry I have to correct you.

[jerrylittle]

Originally Posted by The Ladies Man

oh i have no problems with my hp at all i am very pleased. i just heard that they were basically the same motors just the 5.3 had a shorter stroke and that the heads had i think higher compression. the reason i am asking this question is because my buddy has the 97 5.7 and i think it is an ls1. there for the parts should be interchangable. ls1 and ls1, and he said their not. the same. so i want other opinions

Again you might want to check that out my chiltons book says the LSI came out in 98.

[HDChvyTrk]

The LS1 came out in 98 but not as a truck engine. Your friends 5.7 is a "k" motor and it ia an old-school smallblock chevy. Your 5.3 is a completely different engine.

[BIGT2317]

The LS1 came out in the Vettes in '97. The Trans Am's and SS's had it in '98. Just like the LT1 was in the vettes 1 year before it was in the camaros and trans ams.

[flynfol]

the 5.3 has a 3.875 bore. the 5.7 has a 4.00 bore(same as 302,327,350)

[jerrylittle]

Originally Posted by flynfol

the 5.3 has a 3.875 bore. the 5.7 has a 4.00 bore(same as 302,327,350)

The 5.7 is the 350 and the 5.3 is the 327.

[04BlackSilverado]

I may be wrong but, isn't the 302 a Ford?
I had the 305 in my 87 Caprice.

[jerrylittle]

Originally Posted by 04BlackSilverado

I may be wrong but, isn't the 302 a Ford?
I had the 305 in my 87 Caprice.

You are 100% correct. I think he meant the 305. That is the 5.0liter

[chevynutss]

I think you guys forgot about the 302 Chevy put in the 1967-1969 Camaro Z-28. It is a 327 block with a 283 crank, which is a 302. That engine is a monster, it was rated at 280 horsepower for insurance reasons but it really made around 400.

[Snowgoer05]

Its true those 302s were nasty no the motors are not the same the 5.7 in your friends truck is a 350 has a 4.0 inch bore the new motros are completely differnt nothing in common nothing exchangable and i dont know who said the the 5.3 is a lt1 but its not the 5.7 350 corvette motor is a lt1

[jveik]

yeah i would love go get ahold of a good 302 or at least an old 327. the 327 actually had a lot more balls than the 350 because it had better heads on it so im assuming that just means it had a buttload of compression. thats why im getting the 30 dollar option of dometop pistons for rebuilding my 350 so it can get up to 10 or 11 to 1 compression. i think the old 350's only had 8 or 9 to 1 compression, so that wasnt too good compared to the 327