JP Blanchette

do you know the best flow LS head on the market?

mine are the PRC Stage 2.5 5.3L CNC Ported Heads
http://www.texas-speed.com/p-4345-pr...-outright.aspx



Lift Intake Flow Exhaust Flow
.200" 147 cfm 111 cfm
.300" 206 cfm 145 cfm
.400" 254 cfm 185 cfm
.500" 291 cfm 204 cfm
.600" 308 cfm 223 cfm

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there are my complete setup

Engine / Moteur
Forged engine (10.0:1 comp)
Bloc LS6 / 347cui
Piston Diamond -8.6
Rods K1 avec arp2000 rods bolt
Camshaft(232/240 .595/.608 115 LSA)
Arp main and head studs
PRC 62cc head
COMP Cams Trunnion Upgrade Kit
LS9 head gasket
LS6 intake
LS6 Valley pan convertion
Hotwire Kit
Headers TSP 1 7/8
Hooker exhaust
TSP ''Y'' pipe
V-Band clamp on pipe

Drivetrain
Transmission T-56 rebuilt Stage 3 (31 spline,800hp+)
Clutch McLoed RXT (twin disk)
Diff Moser 9" trutrac posi and 4.11's.
Cross drilled/slotted rotors.
Pro 5.0 with LSS.
Strange Chromoly drive shaft (1200hp)
Mags 17x9 and 17x11 Zr1 Silver and Machined Lip
Front tire Goodyears 275/40r17
Rear tire Nitto NT05Rs 315/35r17
Line lock Husrt

Chassis/Suspension
BMR lowering springs 2''
BMR panhard bar and relocation brackets
BMR subframe connectors
BMR adj torque arm tranny Mount.
Sphon tunel mount drive shaft safty loop
Lower control arm ajustable et relocation braket
Shock Strange DA 10 point d'ajustement

Électronic
Wideband & Fuel pressur AEM analog on A-Pillar
Radio & speaker original

what heads you suggest me??????????

i found a article on hotrod site
http://www.hotrod.com/techarticles/e...t/viewall.html

maybe interresing to watch

Blown06

iTrader: (32)

Well you want the best head for an ls engine.......spend about $9000 with Allpro. They have an ls head that'll go 450+ cfm on the intake.

Looking at your set up.....I don't believe you are there yet.

But getting a cathedral head in the 350+ cfm range is easy to find.

2000RATA

Your clutch won't hold the power you can make on the PRC heads you have? Also if you want that trans to live at 800+ rwhp I suggest the internal spray oiler and a pump if it's not already been done.
I'm making just over 1K rwhp with a 6 speed and I'm running ported 317 heads. There are a lot of guys not making that power with aftermarket heads. Mines been together for 2 years now. Never done anything but change oil and upgrade the clutch. I have the McLeod original twin upgraded for more power.
If your looking for well over 1000 to the tires an aftermarket head casting is a good idea.

JP Blanchette

it said McLeod RXT Street Twin clutches are designed to handle up to 1,000 hp...

2000RATA

I had the original street twin rated at 1200 HP and it started slipping at a little over 900 whp so I imagine running that rxt at 800+ rwhp will have similar results.

LS1RedZ

iTrader: (19)

If your really wanting to push that motor I'd look into some trick flow heads. I think the 225s would work well and they flow very well on the exhaust side for an off the shelf head.