799, 243 5.3 and ls6 heads
#1
799, 243 5.3 and ls6 heads
I understand all of these are about the same. I understand that the ls6 heads have the lighter valves.... 5.3s will lower the compression.
Now my question is this.
How could I look at a set of 243 heads and tell if they are LS6 or 243 heads?
For say $450.00, I can get a set of 243s however I dont know if they are 5.3s or not. I can care less about the sodium filled valves. I am just trying to improve over the 241s on the car now. The car now has headers, ported TB, LS6, HPTuners, and CAI. With the heads I will be installing a 228-230 cam. I could just do the cam swap and a 200.00 pulley for 10hp increase, if all ill see is 20 HP by switching to stock 243 heads for 450.
Now my question is this.
How could I look at a set of 243 heads and tell if they are LS6 or 243 heads?
For say $450.00, I can get a set of 243s however I dont know if they are 5.3s or not. I can care less about the sodium filled valves. I am just trying to improve over the 241s on the car now. The car now has headers, ported TB, LS6, HPTuners, and CAI. With the heads I will be installing a 228-230 cam. I could just do the cam swap and a 200.00 pulley for 10hp increase, if all ill see is 20 HP by switching to stock 243 heads for 450.
#2
5.3 heads will raise your compression not lower it. LS6 heads are 243's. 5.3 heads have a different number like 862. Not sure if I understand your post. But you will see alot more than 20hp gain by going to 243 heads and a 228-230 cam.
Last edited by nobreaks254; 10-17-2009 at 10:07 PM.
#3
12 Second Club
iTrader: (4)
I understand all of these are about the same. I understand that the ls6 heads have the lighter valves.... 5.3s will lower the compression.
Now my question is this.
How could I look at a set of 243 heads and tell if they are LS6 or 243 heads?
For say $450.00, I can get a set of 243s however I don't know if they are 5.3s or not. I can care less about the sodium filled valves.
Now my question is this.
How could I look at a set of 243 heads and tell if they are LS6 or 243 heads?
For say $450.00, I can get a set of 243s however I don't know if they are 5.3s or not. I can care less about the sodium filled valves.
So if I could pay $250 for #799s or $450 for #243 with heavy valves, get the #799s and pocket the extra cash, yet get all the performance.
If you've got $450, find a set of the lightweight valves (LS6) heads. Personally I would save up another $500-600 and get a set of new CNC LS6 heads with the light valves.(Read sig)
#4
200hp
MORE than 200HP? wow. That would be nice but I doubt it. I thought for sure some 243s were on the 5.3 engines as well. Thats why i figured there was a difference between those and the LS6 heads.
Also Sweets10v8:
Where can you get the 799 heads for 250.00 Ill be glad to jump on a set right now. PM me if you find another set. I am not into purchasing anything for the Z right now until the Vette is finished but at that price....Id have to make an exception.
Thanks for the input guys.
Also Sweets10v8:
Where can you get the 799 heads for 250.00 Ill be glad to jump on a set right now. PM me if you find another set. I am not into purchasing anything for the Z right now until the Vette is finished but at that price....Id have to make an exception.
Thanks for the input guys.