LS1 heads on a 5.3
#1
Teching In
Thread Starter
Join Date: Feb 2007
Location: Spotsylvania, VA
Posts: 24
Likes: 0
Received 0 Likes
on
0 Posts
LS1 heads on a 5.3
Putting together a 5.3 and I have a set of LS1 heads and a set of 5.3 heads. Both stock. Just out of interest was wandering if anyone new which head would be a better choice on a slightly modified setup? Not looking to modify the heads.
#6
ls1 and 5.3 heads are the same. only difference is the ls1 chamber is a little bigger by 3 to 4cc. valves and ports are same. Attitude, your thinking bout the 243s. they have bigger ports and intake valve. Loudman, just look into a little port work on the 5.3 heads and it will rock.
#7
Praise The Lowered
iTrader: (17)
ls1 and 5.3 heads are the same. only difference is the ls1 chamber is a little bigger by 3 to 4cc. valves and ports are same. Attitude, your thinking bout the 243s. they have bigger ports and intake valve. Loudman, just look into a little port work on the 5.3 heads and it will rock.
Trending Topics
#8
Teching In
Thread Starter
Join Date: Feb 2007
Location: Spotsylvania, VA
Posts: 24
Likes: 0
Received 0 Likes
on
0 Posts
Thanks. seems like the 5.3 heads sound like the better option. Now just throwing this out there as food for thought, since this is just a temporary backup, if i have the block bored to 3.90 would it be better to port the 5.3 heads or just use the LS1's.
sorry bout the hypotheticals just dont want to spend a lot of money on this set up but dont want to put together a complete turd.
comparing 852's to 241's if it make a difference
sorry bout the hypotheticals just dont want to spend a lot of money on this set up but dont want to put together a complete turd.
comparing 852's to 241's if it make a difference
Last edited by LOUDMAN; 01-31-2010 at 03:10 PM.
#9
ls1 and 5.3 heads are the same. only difference is the ls1 chamber is a little bigger by 3 to 4cc. valves and ports are same. Attitude, your thinking bout the 243s. they have bigger ports and intake valve. Loudman, just look into a little port work on the 5.3 heads and it will rock.
243's and 241/853's share 2.00/1.55 valves. 5.3 heads have 1.89/1.55" valves and a 61.1cc chamber. 241's have a better casting that supports higher flow than the 853's. 243's are the best factory LS1 style head to date with 64.5cc chamber and a more efficient chamber and port design that is nearly identical to the 317 (317 uses a 71cc chamber).
Thanks. seems like the 5.3 heads sound like the better option. Now just throwing this out there as food for thought, since this is just a temporary backup, if i have the block bored to 3.90 would it be better to port the 5.3 heads or just use the LS1's.
sorry bout the hypotheticals just dont want to spend a lot of money on this set up but dont want to put together a complete turd.
comparing 852's to 241's if it make a difference
sorry bout the hypotheticals just dont want to spend a lot of money on this set up but dont want to put together a complete turd.
comparing 852's to 241's if it make a difference