5.3vs. LS6 Heads
5.3vs. LS6 Heads Posted this on another forum with no luck. Here goes.
Planned mods 98 T.A.:
Yank SS3600 stall
L6 Intake
LT's with catted Y (gotta pass visual inspection)
Hooker 3inch catback w/ aeroflow muffler
necessary oil pump/timing chain upgrades
Torquer V2 or V3 cam
I am getting conflicting advice on the heads. I had decided on PRC stage 2.5 heads because of the compression bump of the smaller chambers but a few buddies are saying I should go with the LS6 2.5 heads. Which heads will be better with my setup and why?? Thanks in advance!!
Planned mods 98 T.A.:
Yank SS3600 stall
L6 Intake
LT's with catted Y (gotta pass visual inspection)
Hooker 3inch catback w/ aeroflow muffler
necessary oil pump/timing chain upgrades
Torquer V2 or V3 cam
I am getting conflicting advice on the heads. I had decided on PRC stage 2.5 heads because of the compression bump of the smaller chambers but a few buddies are saying I should go with the LS6 2.5 heads. Which heads will be better with my setup and why?? Thanks in advance!!
been looking for the same answer. I compared the lift vd flow numbers of the prc 2.5 5.3s versus the prc 2.5 ls6 heads and the mid lift numbers and top end flow numbers seem better on the 5.3s. I am going to be putting a very large cam in my car.. similar to a trex only a little more lift. I was wondering which head I should go with. With the particular cam I am looking at I could fit it under some stage 1 ls6 heads without flycutting but with either the 2.5 ls6 heads of the 2.5 5.3 heads I will have to flycut so thats a moot point.
I am looking for maximum top end power
I am looking for maximum top end power
may want to look into the intake runner volume.
the 5.3s are about 220, which is about as big as i would go with a stock cube motor. otherwise you'll lose so much low/mid range power.
i've seen some of the ls6 heads advertise a runner size in the 230s. while this would make for a killer dyno queen. on the street it is very likely to get beat by a car putting out less power.
something to muse over, maybe call up the tech lines at TR or Tbyrne
the 5.3s are about 220, which is about as big as i would go with a stock cube motor. otherwise you'll lose so much low/mid range power.
i've seen some of the ls6 heads advertise a runner size in the 230s. while this would make for a killer dyno queen. on the street it is very likely to get beat by a car putting out less power.
something to muse over, maybe call up the tech lines at TR or Tbyrne
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been looking for the same answer. I compared the lift vd flow numbers of the prc 2.5 5.3s versus the prc 2.5 ls6 heads and the mid lift numbers and top end flow numbers seem better on the 5.3s. I am going to be putting a very large cam in my car.. similar to a trex only a little more lift. I was wondering which head I should go with. With the particular cam I am looking at I could fit it under some stage 1 ls6 heads without flycutting but with either the 2.5 ls6 heads of the 2.5 5.3 heads I will have to flycut so thats a moot point.
I am looking for maximum top end power
I am looking for maximum top end power
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Call Tsp I Dont Think Thaey Will Agree That There Is Any Real Difference In Top End Between The 2 Heads
That Being Said I Thought The Ls6 Head Produced A Little Better Midrange But I May Be Thinking Of The Eddlebrocks
Call Tsp I Dont Think Thaey Will Agree That There Is Any Real Difference In Top End Between The 2 Heads
That Being Said I Thought The Ls6 Head Produced A Little Better Midrange But I May Be Thinking Of The Eddlebrocks
from what i have noticed 5.3's seem to work really well with midsized cams while the ls6's seem to work a lil better with large cams. I really dont think there is much of a difference between the two however especially since there are people running 10's na with both of these types of heads. Also 5.3's tend to be a lil bit cheaper
