5.3 vs. LS6 heads
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5.3 vs. LS6 heads I've already purchased my cam which is a TSP228R at a .588intake and exhaust lift at a 112lsa. I also plan on running a 100hp shot of NX. Would a set of ported and polished 5.3's be better for my setup or would i be better off going with the ported and polished LS6 heads. Also what about putting bigger valves in 5.3 heads? What would be the best combo?
LS6 heads are better than 5.3 heads. However, the core difference adds almost $1k to the cost. 5.3 heads save money and provide extra compression without requiring as much milling as LS6 heads.
A 100 shot does not really require bigger valves. If you were spray 200 shot, I'd suggest a 1.60 exhaust valve
A 100 shot does not really require bigger valves. If you were spray 200 shot, I'd suggest a 1.60 exhaust valve
PM sent. I have a set of ls6 heads for sale.
I am making the same power as Killer01WS6 if you lock the converter. My budy 94forum2000Z made 5more rwhp than me on the same dyno only dif being the heads5.3. I think he had 40k less on his motor also and my heads are 66cc
I am making the same power as Killer01WS6 if you lock the converter. My budy 94forum2000Z made 5more rwhp than me on the same dyno only dif being the heads5.3. I think he had 40k less on his motor also and my heads are 66cc
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One thing I have noticed is that the 5.3 heads like a lot more timing than the Ls6.
Norm for LS6 seems to be around 24 degrees on pump gas with ~11.2-11.8:1 compression.
I had ~11:1 in my old combo and it liked 30 degrees timing with the 5.3L heads on pump gas as well.
I have heard other people finding the same thing. I have heard it has something to do with the chamber design but I haven't seen any hard analysis yet.
Norm for LS6 seems to be around 24 degrees on pump gas with ~11.2-11.8:1 compression.
I had ~11:1 in my old combo and it liked 30 degrees timing with the 5.3L heads on pump gas as well.
I have heard other people finding the same thing. I have heard it has something to do with the chamber design but I haven't seen any hard analysis yet.
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Originally Posted by AKRA
5.3 heads are better if you don't plan on nitrous, turbo or supercharger. If you plan on any of these the LS1 or LS6 heads would benifit you more.
Good luck,
Al
Good luck,
Al
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Is there any problem running 5.3's with an 11/1 CR on a stroker 383 or 402? I seem to recall that the CR gets too high the bigger cu in you use. I've alresdy got a great set of AS 5.3's and would hate to have to get rid of them when I build a bigger ci in motor.
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Originally Posted by goober35
PM sent. I have a set of ls6 heads for sale.
I am making the same power as Killer01WS6 if you lock the converter. My budy 94forum2000Z made 5more rwhp than me on the same dyno only dif being the heads5.3. I think he had 40k less on his motor also and my heads are 66cc
I am making the same power as Killer01WS6 if you lock the converter. My budy 94forum2000Z made 5more rwhp than me on the same dyno only dif being the heads5.3. I think he had 40k less on his motor also and my heads are 66cc
Originally Posted by xfactor_pitbulls
As far as LS6 cores being a $1k more. SDPC has bare LS6 heads for $582.00. It is what I plan on buying to do a build up from.
Originally Posted by xfactor_pitbulls
As far as LS6 cores being a $1k more. SDPC has bare LS6 heads for $582.00. It is what I plan on buying to do a build up from.
Brandon
Brandon
12564825LS6 2002 Bare Cylinder Head $589.50 Add to Order
I beleive that is for ONE head. Are they showing them on sale elsewhere?
