Patriot vortec heads (Pics Inside)
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From: Henrietta NY
Car: 1984 Trans Am L69
Engine: Sniper EFI Powered 355
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Axle/Gears: 3.42 10 Bolt Posi
Patriot vortec heads (Pics Inside)
Just got my patriot 2151 vortec heads in. I did a fair amount of research and after talking with people who have actually owned the heads I decided to putt the trigger on jegs they were 700 shipped here are the specs.
Technical Specs
Combustion Chamber: 64cc
Intake Runner: 185cc
Exhaust Runner: 60cc
Intake Valve: 2.02"
Exhaust Valve: 1.60"
Max. Valve Spring Lift: 0.575"
Spring Pressure Closed: 115 lbs. @ 1.800"
Spring Pressure Open: 310 lbs. @ 1.225"
Retainer Material: Steel
Valve Seal Material: Viton
Valve Job: 5-angle
Material: Cast Iron
Flow at 500 lift intake 241 exhaust 183
Yes they are cast no c&c the intake and exhaust ports are very smooth to the touch and I cannot immediately see anything wrong with them. I will hopefully have them installed in a month or so.
Anyway here are a few Pics I will try to get more later in the light,





Technical Specs
Combustion Chamber: 64cc
Intake Runner: 185cc
Exhaust Runner: 60cc
Intake Valve: 2.02"
Exhaust Valve: 1.60"
Max. Valve Spring Lift: 0.575"
Spring Pressure Closed: 115 lbs. @ 1.800"
Spring Pressure Open: 310 lbs. @ 1.225"
Retainer Material: Steel
Valve Seal Material: Viton
Valve Job: 5-angle
Material: Cast Iron
Flow at 500 lift intake 241 exhaust 183
Yes they are cast no c&c the intake and exhaust ports are very smooth to the touch and I cannot immediately see anything wrong with them. I will hopefully have them installed in a month or so.
Anyway here are a few Pics I will try to get more later in the light,





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From: Minnesnowta
Car: 1987 Camaro Z28
Engine: 355ci, XE262 , 650dp
Transmission: T-5, RAM clutch
Axle/Gears: 3.23 limited slip
Re: Patriot vortec heads (Pics Inside)
Nice I'm thinking of going vortec one day... Doesn't GMPP offer vortex for less. What's the difference.
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From: Mays Landing, NJ
Car: 1991 z28
Engine: 305 tpi
Transmission: 700r Automatic
Re: Patriot vortec heads (Pics Inside)
700 with the valves installed? good deal either way...i wanna do heads on my tpi 305 let me know how these work out for ya !!
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Joined: Oct 2004
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From: Henrietta NY
Car: 1984 Trans Am L69
Engine: Sniper EFI Powered 355
Transmission: WC T5 w/ Steel Support Plate
Axle/Gears: 3.42 10 Bolt Posi
Re: Patriot vortec heads (Pics Inside)
2.02 , 1.60 valves vs 1.94, 1.50
Handles vortec and non vortec manifolds and valve covers vs only center bolt and vortec.
Guide plates vs self aligning rockers
screw in studs vs press in studs
So I am gonna do is a little clean up just remove any burs on the bowls then bolt them in about a month from now.
http://www.jegs.com/i/Patriot-Perfor...151K1/10002/-1
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From: Lincolnton, NC
Car: 88 IROC
Engine: 97 5.7 Vortec LT4 hotcam
Transmission: 700 r4
Axle/Gears: 3.73
Re: Patriot vortec heads (Pics Inside)
How are they compatible to both vortec and non-vortec manifolds? I understand how they can drill and tap for the other bolts, but how do they expect the runners to fit? Or do they require port matching?
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Joined: Oct 2004
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From: Henrietta NY
Car: 1984 Trans Am L69
Engine: Sniper EFI Powered 355
Transmission: WC T5 w/ Steel Support Plate
Axle/Gears: 3.42 10 Bolt Posi
Re: Patriot vortec heads (Pics Inside)
I know the ports on the heads are slightly smaller than my edelbrock RPM vortec manifold. I will check my regular RPM manifold when I take it off as I would rather use that.
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From: Hendersonville North Carolina
Car: 1991 Black Z28 G92
Engine: 350 for now
Transmission: wc t5
Axle/Gears: factory 3:42
Re: Patriot vortec heads (Pics Inside)
Those look good. I have been doing some research on these heads also. I'm thinking on buying them along with a hot cam. Keep us posted how well they work out. I may just buy a set after all. great price if they are good quality.
Joined: Dec 2005
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From: Macon, GA
Car: 1992 Camaro RS
Engine: Vortec headed 355, xe262
Transmission: T56
Axle/Gears: 9-bolt 3.70
Re: Patriot vortec heads (Pics Inside)
I honestly cant see that as anything more than a marketting gimmick. There's no way regular port intakes can work as well on a vortec pattern head as intakes designed for it. The intake ports are narrower and taller.
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Joined: Oct 2004
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From: Henrietta NY
Car: 1984 Trans Am L69
Engine: Sniper EFI Powered 355
Transmission: WC T5 w/ Steel Support Plate
Axle/Gears: 3.42 10 Bolt Posi
Re: Patriot vortec heads (Pics Inside)
I will let you know but it may be about a month. Like I said before I found a few people who are running them and they seem to love them.
Joined: Dec 2004
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From: Lincolnton, NC
Car: 88 IROC
Engine: 97 5.7 Vortec LT4 hotcam
Transmission: 700 r4
Axle/Gears: 3.73
Re: Patriot vortec heads (Pics Inside)
Midias, can you post up some pics sometime of a gasket on both the intake and heads to see how the ports will line up?
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Joined: Oct 2004
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From: Henrietta NY
Car: 1984 Trans Am L69
Engine: Sniper EFI Powered 355
Transmission: WC T5 w/ Steel Support Plate
Axle/Gears: 3.42 10 Bolt Posi
Re: Patriot vortec heads (Pics Inside)
Sure I will when I get home but unfortunately I only have a vortec intake and gasket around the rest I will have to take off my car but that is not part of the plan until after I get the body work done. But what I can do is post a pic with it next to a friends I will try to get pics this weekend.
Joined: Dec 2004
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From: Lincolnton, NC
Car: 88 IROC
Engine: 97 5.7 Vortec LT4 hotcam
Transmission: 700 r4
Axle/Gears: 3.73
Re: Patriot vortec heads (Pics Inside)
well even with just the vortec we will be able to see the port match/mismatch. I have just always been curious about this. Thanks
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Joined: Oct 2004
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From: Henrietta NY
Car: 1984 Trans Am L69
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Transmission: WC T5 w/ Steel Support Plate
Axle/Gears: 3.42 10 Bolt Posi
Re: Patriot vortec heads (Pics Inside)
Thread Starter
Supreme Member




Joined: Oct 2004
Posts: 4,528
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From: Henrietta NY
Car: 1984 Trans Am L69
Engine: Sniper EFI Powered 355
Transmission: WC T5 w/ Steel Support Plate
Axle/Gears: 3.42 10 Bolt Posi
Re: Patriot vortec heads (Pics Inside)
OK here are some pics of a non vortec gasket. What I found is the gaskets that came with the kit will seal either manifold no prob the gasket part number is
http://www.jegs.com/i/JEGS+Performan...10003/10002/-1
So I put a non vortec gasket over my heads note the gap. Please watch the video



VIDEO
http://www.jegs.com/i/JEGS+Performan...10003/10002/-1
So I put a non vortec gasket over my heads note the gap. Please watch the video
VIDEO
Joined: Dec 2004
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From: Lincolnton, NC
Car: 88 IROC
Engine: 97 5.7 Vortec LT4 hotcam
Transmission: 700 r4
Axle/Gears: 3.73
Re: Patriot vortec heads (Pics Inside)
thank you very much for doing that.
Sealing is one thing, loss of intake air velocity is something else. Id love for some un-biased person to do a dyno comparison of vortec intake versus regular intake on a set of these heads.
One more question, with a regular vortec gasket, when you put it on the heads, does the gasket cover some of the port in the head?
Sealing is one thing, loss of intake air velocity is something else. Id love for some un-biased person to do a dyno comparison of vortec intake versus regular intake on a set of these heads.
One more question, with a regular vortec gasket, when you put it on the heads, does the gasket cover some of the port in the head?
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Joined: Oct 2004
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From: Henrietta NY
Car: 1984 Trans Am L69
Engine: Sniper EFI Powered 355
Transmission: WC T5 w/ Steel Support Plate
Axle/Gears: 3.42 10 Bolt Posi
Re: Patriot vortec heads (Pics Inside)
Yes he gasket is slightly smaller than the ports on the head.
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Joined: Oct 2004
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Car: 1984 Trans Am L69
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Transmission: WC T5 w/ Steel Support Plate
Axle/Gears: 3.42 10 Bolt Posi
Re: Patriot vortec heads (Pics Inside)
Just a small update on the heads. I recently visited a friend who had a fresh set of world products heads and I compared the two. Sorry no pictures but here are some quick notes.
Weight of castings
Both weigh in at about 55lbs assembled seemed similar thickness
Intake ports
World product a little smoother overall but with more areas with casting flash.
Water jackets
World products way smoother and cleaner but I do not think it will change performance much.
Exhaust ports
Similar to intake ports a little smoother but more areas with flash.
Bowls
A little smoother than patriot and the same amount of flash around the deck surface.
Machined surfaces
the world products have a much better valve cover gasket surface but otherwise looks the same.
Overall the WP heads are a little nicer but flow less and cost about the same.
Weight of castings
Both weigh in at about 55lbs assembled seemed similar thickness
Intake ports
World product a little smoother overall but with more areas with casting flash.
Water jackets
World products way smoother and cleaner but I do not think it will change performance much.
Exhaust ports
Similar to intake ports a little smoother but more areas with flash.
Bowls
A little smoother than patriot and the same amount of flash around the deck surface.
Machined surfaces
the world products have a much better valve cover gasket surface but otherwise looks the same.
Overall the WP heads are a little nicer but flow less and cost about the same.
Re: Patriot vortec heads (Pics Inside)
I know this topic is a few months old but I have bought the same pair and now the questions just struck me... What type of intake manifold do these so called "vortec" heads work with? Are they truly vortec?
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Transmission: WC T5 w/ Steel Support Plate
Axle/Gears: 3.42 10 Bolt Posi
Re: Patriot vortec heads (Pics Inside)
They work with standard SBC manifolds and vortec manifolds. They are truly vortec heads. They have a vortec combustion chamber, intake and exhaust runners. But the are set up to be more early SBC friendly with both bolt patterns for intake and valve covers along with guide plates. Given the choice I have decided to use a vortec manifold because these heads do have vortec ports and a vortec manifold lines up better. I am hoping to install mine in the next week or so.
Joined: Dec 2005
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From: Macon, GA
Car: 1992 Camaro RS
Engine: Vortec headed 355, xe262
Transmission: T56
Axle/Gears: 9-bolt 3.70
Re: Patriot vortec heads (Pics Inside)
They're rael vortecs with a gimmicky dual bolt pattern set up.
What I find strange is why they have GM casting numbers on them. Were these originally GM castings?
Re: Patriot vortec heads (Pics Inside)
I have to spend about 700 bucks on a valve job and guides for my GM Vortecs.
If I can get NEW heads for about the same money then I'd take that route instead.
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Joined: Oct 2004
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From: Henrietta NY
Car: 1984 Trans Am L69
Engine: Sniper EFI Powered 355
Transmission: WC T5 w/ Steel Support Plate
Axle/Gears: 3.42 10 Bolt Posi
Re: Patriot vortec heads (Pics Inside)
If you look at the pics you'll see how poorly non vortec gaskets fit the intake ports... You can physically bolt a normal intake to it, but I think you'd lose a lot of power. part of the reason Vortecs make so much power an have such great port velocity are the raised intake runners.
They're rael vortecs with a gimmicky dual bolt pattern set up.
What I find strange is why they have GM casting numbers on them. Were these originally GM castings?
They're rael vortecs with a gimmicky dual bolt pattern set up.
What I find strange is why they have GM casting numbers on them. Were these originally GM castings?
Personally I got the entire install kit for about 850 from jegs. Was free shipping when I ordered..
http://www.jegs.com/i/Patriot-Perfor...151K1/10002/-1
Came with ARP bolts, head gaskets, manifold gaskets and sealant.
I wish I had time to install these but with a lot of unexpected family issues and illness I cannot even afford the push rods and exhaust gaskets right now.
but I did track down a few people who own them. Here is one conversation.
midias
I am going to get new heads I really like the looks of the patriot 185cc vortec preassembled. I am having trouble finding reviews from actual owners. I was wondering if you could tell me how you like yours?
C10 Sleeper
I had the patriot vortec heads on my last 355. I ordered them from jegs and then researched them while they were being shipped. If I would have read about them before I ordered them I probably would have avoided them from what little feedback I could find on them none was good. However the set I got were not like what people were saying about them and I was happy. I liked them enough I would buy another set or maybe even upgrade. My 355 had 11:1 compression ratio,comp cams magnum 292 cam, weiand air strike manifold with a Holley 750 dp and Doug thorley tri y headers. My 78 c10 long bed truck weighing in at about 5000 pounds was a handful. It would smoke the tires at a 55-60 MPH rolling start if I really pushed it. Hands down I don't think they can be beat for the money.
Thanks for the info. I have been looking for good reviews on patriot for a while. Most of what I read was second hand and about some of the aluminum heads. I have found very little about the vortec heads so I have been contacting everybody I can find that actually owns a set.
Sorry just one more question. Did you buy them assembled and were there any problems?
Sorry just one more question. Did you buy them assembled and were there any problems?
Sorry it took so long to get back to you I have been working 15 hour days. I bought them from jegs ready bolt on and go. No problems really that I can remember. If you call the tech support number they are really help full. I originally was using a vortec manifold and I highly recommend you do. Or atleast use a manifold with large runners or it will be a real pita to get sealed. I switched to a standard old style edelbrock performer intake and there wasn't any room for being off center at all. Also if you use a standard manifold you will need 4 5/16 bolts or set screws to seal the valley where the vortec bolts go. Click on my photo bucket link to see the pictures of my installation I used studs to hold my intake on. Also not that flow numbers are all to be concerned about compare them to other heads in and around the same price range you will see the edelbrock street heads or e street heads cost more are aluminum and still don't flow as well. I think these heads with a 0.500 ish lift cam and 240-250* duration @ 0.050 will make the average person scared for a while.
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From: Columbia, TN
Car: 1990 camaro rs
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Re: Patriot vortec heads (Pics Inside)
few questions for ya, im plannin on one day buying the 383 4-bolt short block from blue print engines from jegs and build my own top end, these heads seem pretty good from what ive read. Are the rocker studs screw in or press in (my jegs mag doesnt specify) and did you use the angle or straight plug one? And last, if you know, would the 185cc work good with the weiand 144 blower?
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Joined: Oct 2004
Posts: 4,528
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From: Henrietta NY
Car: 1984 Trans Am L69
Engine: Sniper EFI Powered 355
Transmission: WC T5 w/ Steel Support Plate
Axle/Gears: 3.42 10 Bolt Posi
Re: Patriot vortec heads (Pics Inside)
few questions for ya, im plannin on one day buying the 383 4-bolt short block from blue print engines from jegs and build my own top end, these heads seem pretty good from what ive read. Are the rocker studs screw in or press in (my jegs mag doesnt specify) and did you use the angle or straight plug one? And last, if you know, would the 185cc work good with the weiand 144 blower?
Thread Starter
Supreme Member




Joined: Oct 2004
Posts: 4,528
Likes: 240
From: Henrietta NY
Car: 1984 Trans Am L69
Engine: Sniper EFI Powered 355
Transmission: WC T5 w/ Steel Support Plate
Axle/Gears: 3.42 10 Bolt Posi
Re: Patriot vortec heads (Pics Inside)
Wow been a while sense I bought these but I am hoping the install will be finished tomorrow 

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From: Henrietta NY
Car: 1984 Trans Am L69
Engine: Sniper EFI Powered 355
Transmission: WC T5 w/ Steel Support Plate
Axle/Gears: 3.42 10 Bolt Posi
Re: Patriot vortec heads (Pics Inside)
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