Highest Flowing LS3 Cylinder Head Available - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Jason 98 TA · 03-19-2012, 11:11 AM

We're finalizing the new 263cc version of the PRC LS3 aftermarket casting cylinder heads right now guys! The good news is 380cfm with a runner that is the same size as stock & better than stock valve drop!

Look for heads cam power numbers to never be the same very very soon!!

CGT · 03-19-2012, 01:03 PM

Quote:

Originally Posted by Jason 98 TA

We're finalizing the new 263cc version of the PRC LS3 aftermarket casting cylinder heads right now guys! The good news is 380cfm with a runner that is the same size as stock & better than stock valve drop!

Look for heads cam power numbers to never be the same very very soon!!

Same valve sizes as the smaller version? What is the MCSA of both versions?

Unobtainium · 03-19-2012, 04:54 PM

That number sounds great, especially if it was at a realistic lift # like .650".
I'm assuming this is a CNC package for that casting?

woodside783 · 03-19-2012, 06:06 PM

Hell yeah

ULTRAZLS1 · 03-20-2012, 10:06 AM

Quote:

Originally Posted by Jason 98 TA

We're finalizing the new 263cc version of the PRC LS3 aftermarket casting cylinder heads right now guys! The good news is 380cfm with a runner that is the same size as stock & better than stock valve drop!

Look for heads cam power numbers to never be the same very very soon!!

So what was the point of me buying the 250cc versions?

You advertised the 250cc runner to be an advantage due to added velocity...then make a stock size runner casting and claim it to be the best ever?

I am confused...

Kyle2k · 03-20-2012, 11:44 AM

Is there an option for smaller combustion chambers to up the compression like your other cylinder heads?

Edit: Also, are these the heads that you were working on that would accept an LS7 intake manifold?

HaubSS · 03-20-2012, 12:33 PM

Jason,

I did just purchase my TSP 229/236 camshaft and will be having it installed within the next 2 weeks, so if you need a test dummy....I can be that guy.

Looking forward to seeing the dyno results of these heads.

VADER SS L99 · 03-20-2012, 01:46 PM

Quote:

Originally Posted by ULTRAZLS1

So what was the point of me buying the 250cc versions?

You advertised the 250cc runner to be an advantage due to added velocity...then make a stock size runner casting and claim it to be the best ever?

I am confused...

Kyle2k · 03-22-2012, 09:17 AM

Bump for unanswered questions...

IDEALG · 03-22-2012, 10:40 AM

No offense to anyone,

But you guys all must play with yourselves

you got guys with 800 + horsepower before these heads even came out.
They're blowing axles and drivesshafts and clutches trying to get thier car to hook up...

i mean how much horsepower do you really need? all the horsepower and torque in the world wont make you the fastest without the right drivetrain to back it up. and even with the right drivetrain there always too much horsepower and torque around for it to handle.

Kyle2k · 03-22-2012, 12:52 PM

Quote:

Originally Posted by IDEALG

No offense to anyone,

But you guys all must play with yourselves

you got guys with 800 + horsepower before these heads even came out.
They're blowing axles and drivesshafts and clutches trying to get thier car to hook up...

i mean how much horsepower do you really need? all the horsepower and torque in the world wont make you the fastest without the right drivetrain to back it up. and even with the right drivetrain there always too much horsepower and torque around for it to handle.

Because there are only so many ways to increase power on a naturally aspirated setup?

MA2010SS · 03-22-2012, 01:07 PM

I'll try to keep this answer simple, it all depends on your camshaft, if the heads flow 380CFM at what point are they providing the best flow numbers .700 lift??? A lesser flow numbers say 340CFM head work excellent with a .600 lift. If you have that same .600 lift cam working with the 380CFM head, the heads will outflow the cam. It will come down to the best combo of heads/cam.

Hope this helps

Kyle2k · 03-22-2012, 01:25 PM

Quote:

Originally Posted by MA2010SS

I'll try to keep this answer simple, it all depends on your camshaft, if the heads flow 380CFM at what point are they providing the best flow numbers .700 lift??? A lesser flow numbers say 340CFM head work excellent with a .600 lift. If you have that same .600 lift cam working with the 380CFM head, the heads will outflow the cam. It will come down to the best combo of heads/cam.

Hope this helps

Very true, and keep in mind it isn't always about the flow numbers. Valve angle, port velocity, etc also factor in...I will say that it isn't necessarily a bad thing that heads can outflow the cam either- just don't be looking for the holy grail and upgrading every time a set of heads with 5 more cfm come out.

MA2010SS · 03-22-2012, 02:43 PM

Quote:

Originally Posted by Kyle2k

Very true, and keep in mind it isn't always about the flow numbers. Valve angle, port velocity, etc also factor in...I will say that it isn't necessarily a bad thing that heads can outflow the cam either- just don't be looking for the holy grail and upgrading every time a set of heads with 5 more cfm come out.

Right on, it's always about the combo that is put together and what the end goals are...mild, full race...etc

03-19-2012, 11:11 AM	#1
Jason 98 TA Drives: Camaro Join Date: Apr 2009 Location: Texas Posts: 1,669	Highest Flowing LS3 Cylinder Head Available We're finalizing the new 263cc version of the PRC LS3 aftermarket casting cylinder heads right now guys! The good news is 380cfm with a runner that is the same size as stock & better than stock valve drop! Look for heads cam power numbers to never be the same very very soon!!

03-19-2012, 04:54 PM	#3
Unobtainium Fabricator Drives: 2011 2SS Summit White Join Date: Jun 2011 Location: Langdon, AB Posts: 505	That number sounds great, especially if it was at a realistic lift # like .650". I'm assuming this is a CNC package for that casting? __________________ Roto-fab CAI Unobtainium Welding Exhaust ARH LT's 393whp L99 GPI VVT Turbo Cam-in

03-19-2012, 06:06 PM	#4
woodside783 Casey Woodside Drives: a very fun car Join Date: Jun 2010 Location: Tn Posts: 1,906	Hell yeah __________________ Instagram @caseywoodside http://youtu.be/CSc9aPh_X_w

03-20-2012, 11:44 AM	#6
Kyle2k LVL 50 Troll Stomper Drives: 2010 Camaro Join Date: Feb 2008 Location: Indianapolis Posts: 3,463	Is there an option for smaller combustion chambers to up the compression like your other cylinder heads? Edit: Also, are these the heads that you were working on that would accept an LS7 intake manifold? __________________

03-20-2012, 12:33 PM	#7
HaubSS Drives: '11 IBM 2SS/RS LS3/M6 Join Date: Feb 2011 Location: Lemoore, CA Posts: 469 View My Garage	Jason, I did just purchase my TSP 229/236 camshaft and will be having it installed within the next 2 weeks, so if you need a test dummy....I can be that guy. Looking forward to seeing the dyno results of these heads. __________________ 2011 IBM 2SS/RS - LS3/M6 - Grey Interior Full bolt-ons + TSP 229/236, 112 LSA Tuned by STARKWEATHER PERFORMANCE BMR Stage 3 suspension MRR 288 - 20x10(+35), 20x11(+43)

03-22-2012, 09:17 AM	#9
Kyle2k LVL 50 Troll Stomper Drives: 2010 Camaro Join Date: Feb 2008 Location: Indianapolis Posts: 3,463	Bump for unanswered questions... __________________

03-22-2012, 10:40 AM	#10
IDEALG Chevy's "Rumble" Best! Drives: 2015 ZL1 6 speed Join Date: Feb 2011 Location: Ideal Garage aka (Grayskull) Fords, nj Posts: 4,458 View My Garage	No offense to anyone, But you guys all must play with yourselves you got guys with 800 + horsepower before these heads even came out. They're blowing axles and drivesshafts and clutches trying to get thier car to hook up... i mean how much horsepower do you really need? all the horsepower and torque in the world wont make you the fastest without the right drivetrain to back it up. and even with the right drivetrain there always too much horsepower and torque around for it to handle. __________________

03-22-2012, 01:07 PM	#12
MA2010SS Drives: 2010 Camaro SS Join Date: Aug 2010 Location: Somerset MA Posts: 725 View My Garage	I'll try to keep this answer simple, it all depends on your camshaft, if the heads flow 380CFM at what point are they providing the best flow numbers .700 lift??? A lesser flow numbers say 340CFM head work excellent with a .600 lift. If you have that same .600 lift cam working with the 380CFM head, the heads will outflow the cam. It will come down to the best combo of heads/cam. Hope this helps __________________ 2010 Camaro SS Whipple SC, CAI Inc Intake, TSP 1 7/8" LT headers no cats, 3" magnaflow exhaust, HPT, RX Catch Can, LSR Toe Rods, LSR Trailing Arms, ALKY Control Meth, McLeod RXT Twin Disc, ZL1 fuel pump, 3.73 ZL1 Differential Kit, BTR PDS Stage 2 Cam, Tuned by SLOWHAWK Performance Bridgewater MA

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