mechamta98

iTrader: (1)

I'm looking for info on these heads. Since they're 6.0 castings are they 243/799 or 317? What stage, valve spring package, and port volume? Any info would be helpful. The only number on them is 0211206. there is no casting number.

Always2Slow

iTrader: (8)

Oh my goodness its an ultra rare exotic casting. Where did you come across this cylinder head? What you have is a 243 or 317 head. The exhaust D port shape gives it away and the 6.0 casting on the underside. What I would do is CC the combustion chamber and see where your at and should give you some idea on where you currently sit.

Husker98

iTrader: (11)

My brother posted these for me. He has them in a machining class in school checking them out for me. I bought them bolted to an engine I bought from a nember here. All the info I got was ls6 patriot 59cc. After pulling heads found a valve mark on #1 piston and a broken spring. All valves are good but bronze guides are wore. He said deck thickness was stock so now I'm unsure of the 59cc but the school doesn't have tools to measure cc. And not sure but I think valves measured out at 2.02 1.57

Husker98

iTrader: (11)

Also they don't have tools to check spring pressure or height. I'm guessing stage II with gold dual .650?

sardo_67

iTrader: (2)

if you take a spring out and bring it to a local machine shop i'm sure they could check the spring PSI. shop i know of probably would do it for free since it's all of a 30 sec job, put in press/scale thing, pull on arm and read it.

i think my shop would charge you $50 to CC the head, maybe less i can't sure. I CC'd 2 chambers on a 4.0 jeep head last weekend, first time in over 10 years and it took me only 25min so it's not a hard thing.

Husker98

iTrader: (11)

Look what I found!

Patriot LS6-style CNC Heads
Company:dumPatriot Performance
Intake cc: 227
Chamber cc: 59
Approximate Compression: 11.1:1

Patriot says there are several things that set its heads apart. First, it offers combustion chamber sizes from 59cc to 72cc while maintaining the stock deck height. In addition, these sizes are offered for any bore in the range of 3.90 to 4.125 inches. A choice of valve sizes is available, ranging between 2.02 and 2.08 inches, and the heads come out the door fully assembled with goodies such as titanium retainers, viton rubber seals, and Patriot's own Gold Dual valvesprings. Pricing is $1,195 per pair, assembled.

Read more:dumhttp://www.gmhightechperformance.com/tech/lsx_engine/0601htp_gen_3_gen_4_cylinder_head_guide/viewall.html#ixzz2hOI94qCD

Husker98

iTrader: (11)

Now can anyone tell me if these heads with the 2.02 1.57 valves sit on a stock 5.3 bore? I know it says 3.9-4.125 but I've seen combos where heads designed for 4.030 bore work on a 3.9

serumzgsh

He has them in a machining class in school checking them out for me.