6.0 or 5.7, Which exhaust valve is better? 6.0=tulip shaped surface 5.7= flat surface
#1
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6.0 or 5.7, Which exhaust valve is better? 6.0=tulip shaped surface 5.7= flat surface
The 5.7 & 6.0 have different looking exhaust valves ??
The 5.7 exhaust valve has a flat surface...
The 6.0 exhaust valve has a tulip, 'dished' , surface...
Is one better than the other ??
I was just thinking of using the 5.7 exhaust valves in 6.0 heads, to raise the CR a little...
It appears that the tulip shape is making the chamber a couple of CC's bigger..
I may be wrong ??
Thanks,
Dave
The 5.7 exhaust valve has a flat surface...
The 6.0 exhaust valve has a tulip, 'dished' , surface...
Is one better than the other ??
I was just thinking of using the 5.7 exhaust valves in 6.0 heads, to raise the CR a little...
It appears that the tulip shape is making the chamber a couple of CC's bigger..
I may be wrong ??
Thanks,
Dave
Last edited by 2000Firehawk; 01-10-2004 at 11:20 AM.
#4
TECH Fanatic
Originally Posted by niphilli
THe 6L head castings are almost identical to the LS6 heads, they just have a bigger combustion chaimber. The 6L design has better flow characteristics.
oops! I thought I read exhaust port . Too early I guess
I did not know that there was a difference in the valves as well.
TTT 4 Ya
#5
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Originally Posted by 2000Firehawk
The 5.7 & 6.0 have different looking exhaust valves ??
The 5.7 exhaust valve has a flat surface...
The 6.0 exhaust valve has a tulip, 'dished' , surface...
Is one better than the other ??
I was just thinking of using the 5.7 exhaust valves in 6.0 heads, to raise the CR a little...
It appears that the tulip shape is making the chamber a couple of CC's bigger..
I may be wrong ??
Thanks,
Dave
The 5.7 exhaust valve has a flat surface...
The 6.0 exhaust valve has a tulip, 'dished' , surface...
Is one better than the other ??
I was just thinking of using the 5.7 exhaust valves in 6.0 heads, to raise the CR a little...
It appears that the tulip shape is making the chamber a couple of CC's bigger..
I may be wrong ??
Thanks,
Dave