Rick_Vor

iTrader: (36)

Category: Engine - Intake/Fuel
Price: $750
Location (State): CA
Item Condition: Used
Shipping Information: Item Can be Shipped
Engine: LS1/LS6
LS Engine?: Non-LS Part

Up for sale is one used set of Patriot Stage 2 317 LQ9 CNC ported cylinder heads. Part #2017. They have aproximately 5k miles and had been milled .030 when I bought them. I had them surfaced (.003), the valves inspected, new seals installed, spring heights verified and the chambers cc'd. They came back at 65cc and that ended up being on the small side for my forged 370 so I never installed them. They are in excellent condition, the surfaces are perfect and are 100% ready to bolt on. Sold.

From Patriot's website:

Our custom 5 axis CNC machined new GM castings make these heads a must have for any performance oriented GM LS series engine. These heads provide up to a 65 cfm improvement over stock OEM versions. The 72cc chambers are great for lowering compression for applications where a power adder will be used. On a stock LS1, the compression will drop from 10-1 to approximately 9.0-1 with these heads. The Stage II heads feature 21-4N 2.055”/1.57” stainless steel valves, our Original Patriot Gold Dual .650” Lift springs, titanium retainers, Super 7 machined locks, custom honed bronze guides, machined spring bases, and viton rubber seals.

Technical Specs:

Combustion Chamber: 72cc
Intake Runner: 227cc
Exhaust Runner: 70cc
Intake Valve: 2.055"
Exhaust Valve: 1.57"
Max. Valve Spring Lift: 0.650"
Spring Pressure Closed: 135 lbs. @ 1.800"
Spring Pressure Open: 375 lbs. @ 1.090"
Retainer Material: Titanium
Valve Seal Material: Viton
Valve Guide Material: Manganese Bronze
Valve Job: 5-angle









Thanks for looking, Rick

madmike9396

iTrader: (29)

So how much hp would these add to my stock ls1 if i just wanted to add them with out a cam ?

Rick_Vor

iTrader: (36)

I'm a 6.0 F/I guy but I would have to think that even with a stock cam, you would be looking at 25-35 RWHP over a set of 243's. The potential is 400+ RWHP once you add a cam and exhaust.

If you have everything stripped off to do a head install, I'd pick up a used cam and install it while was at it. You would save yourself a lot of time down the road.

Rick

Rick_Vor

iTrader: (36)

To the Top...

Rick

fatmeats12

so the chambers are indeed 65cc vs 72cc listed in the specs?

tia

Rick_Vor

iTrader: (36)

I'd have to find my paperwork from the shop that worked on them for me but I'm pretty sure it just states the labor to "cc", not the results.

They did write the "cc's" on the back of each head.



Rick

hoseman1553

I noticed the specs mentioned "Power Adder" application, are they meaning F/I or nitrous? Im not too familiar with those apps just yet.

Rick_Vor

iTrader: (36)

They are recommending this cylinder head for forced Induction applications.

Price dropped

Rick

Rick_Vor

iTrader: (36)

Friday night bump...

Rick

Rick_Vor

iTrader: (36)

Doh! I have had two deals for $750 shipped fall through. Must be a tough week to sell some heads.

Rick

Rick_Vor

iTrader: (36)

Sold.
Rick

clayz

iTrader: (9)

could you both da heads on a stock ls1 with cam i mean straight on with no promblems