Generation III Internal Engine 1997-2006 LS1 | LS6
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List All Patriot Head Problems Encountered

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Old 05-02-2004, 09:38 PM
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Trust me Gomer, you have NO idea how much work went into Damians setup

I think TEA hand finished his heads for free after he sent em back 6 times with bent valves cause he couldnt get the cam in right. They felt bad for the guy

JK Hulkster

Gomer, when ya headin over this way man? F Body Gathering is May 28-30th... We are unveiling our Dick Harrell Wide body cars @ the open house that Friday...
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Old 05-02-2004, 10:19 PM
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2000 miles = no problems
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Old 05-02-2004, 11:14 PM
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Originally Posted by Cammin BeaSSt
Trust me Gomer, you have NO idea how much work went into Damians setup

I think TEA hand finished his heads for free after he sent em back 6 times with bent valves cause he couldnt get the cam in right. They felt bad for the guy

JK Hulkster

Gomer, when ya headin over this way man? F Body Gathering is May 28-30th... We are unveiling our Dick Harrell Wide body cars @ the open house that Friday...
Cool, i cant wait to check out one of those Harrell cars in person, it looks like it should be pretty sick.
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Old 05-03-2004, 12:18 AM
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Spanky, I believe the diffrence lies in the combustion chamber. I noticed on the sheets you posted, both heads were "flowed" on a 3.900 bore. That can't be good for numbers on the 6.0 head with its bigger chamber. I'm not going to argue the question that some have heads that flow more, but what size are there runners? I've seen up to 235+cc's on some of these LS-6/6.0 heads. Patriots spec in at 225-228. Most of the cars these heads are going on can't even come close to using 330+ cfm. It's all part of the game I guess. Most consumers chase numbers and not the big picture. Oh well.
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Old 05-03-2004, 08:38 AM
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Im making 591 rwhp on a car thats 80% tuned with pp 6.0l heads and no problems yet. Only minor thing was one of the coolant plugs had a little drip.
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Old 05-03-2004, 11:21 AM
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Originally Posted by Beast96Z
Most of the cars these heads are going on can't even come close to using 330+ cfm. It's all part of the game I guess. Most consumers chase numbers and not the big picture. Oh well.
The flow data without the intake in place is meaningless for the most part as most of us since we have LS6 intakes.

The top of the line 320-330+cfm heads will flow about 275-280 cfm with the LS6 intake in place. These cars can use 275-280cfm spinning to 6,800 rpm.

Most heads that flow ~290 to 300 cfm will only flow ~240 to 255 cfm with the LS6 intake in place.

BTW - I agree the PP chamber for their LS6 style head looks good with it's figure eight double quench style.

This why we really don't have "too much" cylinder head for our current combo's the intake knockes the flow down a good bit even with the best of the current Gen III heads.

As for Patriot quailty do a search there was PP feel good thread that showed ~12 out of ~23 PP customers that posted had had some sort of PP issue. That thread is several months old and may not reflect the current PP quailty. I imagine PP has improved out of necessity over the last few months based on what prior customers were posting in the past.

As with any cylinder head get what ever head you buy get it checked by a quailty shop to make sure no details are missed and the heads flow as advertised. Check stuff BEFORE it goes into the car for best results regardless of the source for the parts.


Last edited by 99 Black Bird T/A; 05-03-2004 at 11:28 AM.
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Old 05-03-2004, 08:39 PM
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Stage 2 6.0 Liter (LS6 style) heads on my car. 1200 miles so far. 400 very hard break in miles and around 600-700 cruising miles. My oil consumption has dropped from a quart every 800 miles (factory heads/cam) to maybe a 1/4-1/3 quart so far. Thats with a new pvc plumbing and catch can also. I'm definately happy with the results.
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Old 05-04-2004, 11:38 PM
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So far my patriot 5.3's have increased my torque output to 417 RWTQ. Only problem i have is hooking up! Thanks Again Terry!!
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Old 05-06-2004, 07:09 AM
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I had ALOT of problems with them - both in damage specific to the heads and collateral (no engine failure though thankfully) that led me to having a bad taste in my mouth towards Patriot which ultimatley led to me pulling them off my car and cutting my losses.

However, I did have one of the earlier sets of the LS1 Stage 2 heads (and the bad valves, springs, etc) and through this board, it appears that most, if not all the problems, have been resolved and additional problems with them have been significantly reduced and people are getting what is extected from Patriot.
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Old 06-18-2004, 01:07 PM
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patriot has EXCELLENT customer service. I AM buying a pair
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Old 06-18-2004, 01:17 PM
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What about the rumor of valve seats dropping? Was it true? Welding up the chambers for more compression doesnt sound like a good idea. It could lead to cracking.
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Old 06-18-2004, 03:17 PM
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I followed Spanky's advice and after much debate I went with MTI 5.3 Stage 2E (58cc). A little over 300 cfm intake and 210 exhaust flow, with a card that garantees me those heads will flow what the've been tested at.
$1795.00
Besides big flow #'s i found that heads also need to be ported in the right places to produce the Hp #'s desired.
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Old 06-19-2004, 06:11 AM
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Originally Posted by abate1224
2000 miles = no problems
4,000 miles here.. Installed a pair in two other vettes local to me at about the same time as well..
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Old 06-19-2004, 10:04 AM
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have about 9,000 miles on my head and cam and no problems here
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Old 06-19-2004, 10:42 AM
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No problems! Patriot makes a great cylinder head.

Brad
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Old 06-19-2004, 11:19 AM
  #36  
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Originally Posted by IMKMFAST
search button dude
stuff gets deleted.....
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Old 06-19-2004, 11:33 AM
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Originally Posted by dug
What about the rumor of valve seats dropping? Was it true? Welding up the chambers for more compression doesnt sound like a good idea. It could lead to cracking.
not a rumor....Discount Tire Direct dropped a valve seat after they were only on for 50 miles....which subsequently destroyed his whole motor. But hey, he got a free set of Patriot heads for his trouble!
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Old 06-19-2004, 01:03 PM
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so far so good
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Old 06-19-2004, 01:29 PM
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Originally Posted by SPANKY LS1
My point was that he was comparing a $1800 304 CFM "LS6 style" head to a $3200 330+ CFM LS6 head. Nothing wrong with the PP head, just need to compare apples to apples. Look around at S2 LS6 heads from AS, TEA, Cartek, MTI, and others. PP is 20-40 CFM behind all of them (Not anything against Patriot, just starting with a lesser core).



Below, see flow charts from a stock LS6 head and a stock 6.0 head. The LS6 outflows the 6.0 by a signifigant margain. This is, IMO, why PP LS6 heads flow 20-40CFM less than real S2 LS6 heads. PP could probably do the same with a set of real LS6 cores, but then their heads would cost the same as everybody elses, and they couldn't sell people who don't know any better a 6.0 head and call it an LS6 head.





Shawn
There are ported 6L heads making just as good or better flow numbers than ported LS6 heads. Initially yes the numbers are different but after a good porter gets at them they are very close

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Old 06-19-2004, 01:30 PM
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Originally Posted by verbs
not a rumor....Discount Tire Direct dropped a valve seat after they were only on for 50 miles....which subsequently destroyed his whole motor. But hey, he got a free set of Patriot heads for his trouble!
yeah and it was a STOCK untouched GM Seat

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