Patriot Heads
Thread Starter
Instructor
Joined: Feb 2009
Posts: 107
Likes: 8
From: Austin TX
Patriot Heads
I have a 02 c5 stock. I found this set of heads for about $900 bucks. Is this what I need. I don't no much about heads. I think the 243 casting is a stock ZO6 head. These are ported . This should be a 50hp upgrade or so , am I right? Here are the specs Does it sound like a good deal?
Patriot Performance CNC Ported 243 LS6 / LS2 2.02"/1.57" 64cc Heads Assembled
Combustion Chamber: 64cc
Intake Runner: 227cc
Exhaust Runner: 70cc
Intake Valve: 2.02"
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
Patriot Performance CNC Ported 243 LS6 / LS2 2.02"/1.57" 64cc Heads Assembled
Combustion Chamber: 64cc
Intake Runner: 227cc
Exhaust Runner: 70cc
Intake Valve: 2.02"
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
Melting Slicks
Joined: Feb 2007
Posts: 3,266
Likes: 8
From: Indian Rocks Beach FL
St. Jude Donor '08-'09-'10
These are good heads but with a stock engine you would be lucky to see half the 50 hp gain. My opinion, you would be better off doing all the bolt on's before worrying about heads. Cold air intake, ported intake manifold, ported throttle body, headers and a catback exhaust. After all that then would be the time to consider heads and cam. But it's your car and the heads certainly won't hurt it. Have fun 
Last edited by Mark C5; Feb 24, 2009 at 04:36 PM.
AMP Racing
Joined: Aug 2006
Posts: 10,756
Likes: 589
From: Washington TWP NJ
2023 C5 of the Year Finalist - Modified
2017 C5 of Year Finalist
St. Jude Donor '09-'10-'11-'12
You asked if these are the heads you need?
We dont know your goals, so we cant answer that question.
Paired with a good cam and headers/exhaust, you'll get nice results.
Patriot heads are budget heads so they arent the best heads available, but if you dont need the best, than they should be fine for you.
If they are $900 used, that's too much. They arent much more than that when new.
Offer $600 and be prepared to pay $700.
There are plenty of cars making 400 RWHP with these heads, so it really depends on the goals you have for your car.
Best of success with you project.
We dont know your goals, so we cant answer that question.
Paired with a good cam and headers/exhaust, you'll get nice results.
Patriot heads are budget heads so they arent the best heads available, but if you dont need the best, than they should be fine for you.
If they are $900 used, that's too much. They arent much more than that when new.
Offer $600 and be prepared to pay $700.
There are plenty of cars making 400 RWHP with these heads, so it really depends on the goals you have for your car.
Best of success with you project.
Thread Starter
Instructor
Joined: Feb 2009
Posts: 107
Likes: 8
From: Austin TX
I am getting a vararam cold air induction, shorty headers and a 228R cam. Then a tune. Wanted to upgrade the heads rather than the 200 it costs to upgrade my springs. That is my goal for now. I would like 420 hp or so. Would like to run in the high 11's somehow.
AMP Racing
Joined: Aug 2006
Posts: 10,756
Likes: 589
From: Washington TWP NJ
2023 C5 of the Year Finalist - Modified
2017 C5 of Year Finalist
St. Jude Donor '09-'10-'11-'12
You came here asking for some advise, so here goes...
Dont waste your money on shorty headers...
Long tube headers, that cam and those heads should get you about 420hp and well into the 11's
Dont waste your money on shorty headers...
Long tube headers, that cam and those heads should get you about 420hp and well into the 11's
Advanced
Joined: Jan 2009
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From: Brewton AL
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Drifting
Joined: Sep 2006
Posts: 1,571
Likes: 1
From: st.louis mo.
are these heads new or used? if used that'sway too much. I have the same heads with 59cc a mild texas speed cam longtubes and ls6 intake and i make about 430 to the wheels. I think i paid about 1200.00new for the heads.
Burning Brakes
Joined: Apr 2003
Posts: 908
Likes: 4
From: TROY MI
I am running these heads with a small cam.My Vert runs 11.4 at 121+ with the mods in my sig.
Banned Scam/Spammer
Joined: May 2007
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From: Machineguns, because I don’t compromise
They are very similar to shorties in their own regard.
Don't blow cash if you're thinking about shorties on a C5.... if this was a '92-95 LT1... then shorties would just barely come into the picture.
Thread Starter
Instructor
Joined: Feb 2009
Posts: 107
Likes: 8
From: Austin TX
shorties
So your saying my stock manifolds will be about as good as shorties. Not to waste money. Is this going to hold me back bigtime not going with longtubes vs. stock manifolds. How much horse power loss are we talking with all the bolt ons , heads and a cam. Thanks
