I have the chance to get a set of Patriot stage 2 LS6 heads with 59cc chamber's and 2.05 int 1.57 exahust valve's. I cant find the part number the guy is giving on Patriot's website part#3382. I am asking if anyone has info on this set up and if it is any good. I have to act soon if I'm going to take them so please post any info you may have.

 

With valves the big and milled to a 59 cc chamber you'll have to be very careful of piston to valve clearance. Depending upon the cam it might be OK or might not.

 

Here is what the guy said in the listing. I did buy them because he said stock deck hight. I will be using an F-14 112 and plan on doing the install this coming weekend.

"Your looking at a set of brand new in the box Patriot performance ls6 59cc stage 2 heads part # 3382, 2.05 intake and 1.57 exhaust valves, stock deck height and double valve springs. Comes with head gaskets and bolts. The reason i'm not using them is because i sold my cts. This is the second time these heads are up for auction because some a??hole stole my password and inserted his own "buy it now" so ebay pulled the auction. To all that were bidding or wanted to bid i'm sorry"

 

Should run pretty nicely. Those aren't stellar heads by any stretch of the imagination, but a 59cc head will give you around 11.4:1 or something close and should make good pumpgas power. Get it dyno tuned and along with a FAST 90/90 intake you should see better results. Are you keeping the stock LS6 intake manifold? At least get the throttlebody ported.

The stock LS6 intake/TB is going to hold you back around 15-20 rwhp with that setup.

I'd imagine that you should be somewhere around 440-445rwhp with the stock LS6 intake manifold and a ported TB.

Mike

 

I spoke to Patriot today and they would not give a clear answer weather or not it will work without fly cutting the piston's. I'm trying to get intouch with Futral but they must be closed today. I did talk to a local place "Vette doctors" and they think I will need to have them fly cut the piston's. Which they can do with the engine still in the car using a head they modified to use as a cutter. The problem is now I will have to pay them to do the whole job "$1700" plus $300 for a dyno tune. I planned to do the labor myself and pay the $300 for the tune. Has anyone had any experiance with these heads and an F-14 cam. I think I may have made a bigger project than I can afford rite now.....Any help is appreciated.....

 

It's going to be hard to say if you'll need to flycut the pistons or not. If they are 59cc heads, then they have been milled .020" or .030", since LS6 heads come around 64cc. Patriot Performance doesn't manufacture heads... they port factory castings.

Add the fact that you have big 2.055" valves and an aggressive cam... well, it starts to get tricky.

I know with my Dart 225cc 2.055" intake heads milled to 59cc and an F-15 cam, it had about .060" clearance, which is very minimal (miss a shift and risk a BOOM) but the Dart heads have more clearance in them than factory heads.

Check the clearance before you fire it up. You can check some how-to's on LS1Tech to see how to properly fly-cut pistons while the motor is still in the car.

Mike

 

mike...

i thought you had your heads milled down to 62cc? cause don't they come with 64s?

just wondering

 

The Darts come as 62cc.

 

Thank's Mike, it look's like fly cutting pistons in the car is not that big of a deal. But the problem is I planned on doing the head/cam swap over the weekend at the dealership I work in so the car will have to drive home by Sunday night. I don't think I want to chance not beeing done by Monday morning and now there are too many variables to think about to just blow through the job. If I knew I would spend this much $$ I would have went with the Trickflow's. I have a set of new 918 spring's and titanium retainer I wont be using so I guess I can sell them to get back some of the cash.

 

You could be very close on your P/V. the FM 14 isn't a small cam along with the 2.05 intakes and milled heads. What is the advance on the cam? If you are only running 2 degrees it might be alright.

 

Good point.

Most LS1 cams come as +4.

The F-14 as a shelf grind is also +4 at 112 LSA 108 ICL.

I think I got lucky with the PtV clearance with my F-15 because it was custom ground at +2.

Mike

 

You should check to see if those heads have even been milled. There is a chance the chambers were welded and CNC shaped with the end result being STOCK ptv clearance.

Ben T.

 

Didn't know that Patriot ever did that.

 

He's saying there's a chance that they did that. Knowing how PP is with their "budget heads", I would have to say that the chance they welded instead of milled is about 1000000000:1

[Dumb and Dumber]
What's the chances you'd sleep with me? About 10:1?
More like 1000000:1
Sooooo... what you're saying is... there's still a chance? Yes!
[/Dumb and Dumber]




Mike

 

2.055 is pretty large for a stock bore.