PRC 5.3L Stage 2.5 Heads (pictures)
05-27-2007, 11:09 AM
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PRC 5.3L Stage 2.5 Heads (pictures) Well the Camaro spun a couple rod bearings, so I am building the motor at the moment. Might as well get some heads in the process. I actually was going to buy Trick Flow heads or ETP, but I didn't see the need in spending the money they want. I remembered talking with Jason and Jon from TSP a while back, and they told me these heads would work great with my TRex cam. Now, my Comp 921 springs were tired, so I needed new springs. If I had purchased the TFS heads, I would need to replace the springs they come with. Not to mention they require roller rockers, valve cover spacers, and pushrods....am I missing something? These heads cam with, what is considered, some of the best springs on the market for the LSX. They bolt right in since they are a factory style head, perfect. Since I saved some money, this allowed me to bump up the quality of internal parts in the motor.
Now, I know AFR is out there, but once I was thinking about saving money, I didn't consider the more expensive heads any longer. I am not looking to push the limits of anything, I just want to run solid 10 second passes NA, and have the ability to go 9s with spray.
These heads are going on the following motor:
2001 LS1 Block (washed and honed)
TSP Ported LS6 Oil Pump
Stock Crank Turned and Chamfered(Slightly)
PRC 5.3L Stage 2.5 Heads milled to a 59cc chamber
Cometic .040" head gaskets for a compression of 11.2:1
Diamond Pistons w/2cc Valve Reliefs
Compstar Rods
ARP Head Studs
TRex Cam (243/249 .610"/.615" 111 LSA)
Ported FAST 90/90
I am hoping for at least 430rwhp
through my nice little Yank PE4400.
Heads:
It's hard to tell in these images, but the chambers are drastically different, and there is an obvious difference in material in the chamber.
PRC Dual Springs Rated .660 Lift.
Now, I know AFR is out there, but once I was thinking about saving money, I didn't consider the more expensive heads any longer. I am not looking to push the limits of anything, I just want to run solid 10 second passes NA, and have the ability to go 9s with spray.
These heads are going on the following motor:
2001 LS1 Block (washed and honed)
TSP Ported LS6 Oil Pump
Stock Crank Turned and Chamfered(Slightly)
PRC 5.3L Stage 2.5 Heads milled to a 59cc chamber
Cometic .040" head gaskets for a compression of 11.2:1
Diamond Pistons w/2cc Valve Reliefs
Compstar Rods
ARP Head Studs
TRex Cam (243/249 .610"/.615" 111 LSA)
Ported FAST 90/90
I am hoping for at least 430rwhp
through my nice little Yank PE4400.Heads:
It's hard to tell in these images, but the chambers are drastically different, and there is an obvious difference in material in the chamber.
PRC Dual Springs Rated .660 Lift.
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05-27-2007, 03:54 PM
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Originally Posted by TXZ28LS1
nice! would u happen to have any flow numbers?
05-27-2007, 10:25 PM
#12
Originally Posted by CamaroSS
They rate them at 313cfm, which was more than most of the other heads I could find out there. But flow numbers are only a way to sell heads, real life performance will show how they really hold up. These heads make good power, dyno after dyno, so they seem to work. For $1199 fully assembled, yeah, I like them a whole lot.
nice!!! tsp has been making good stuff. i might look into those with the TR 230/236 cam i have planned.
