i am looking to see if any body has ported a set of stock z06 heads and is it worth doing? i am looking into either doing this mod or some afr heads , but i was trying to save alil money by porting the stock heads. thanks

 

Have seen a lot of folks ask this question......Don't remember anyone answering though....most responses is to buy a set .. Good Luck... Maybe at the library? Anyway ttt

 

You did not specify whether or not you were intending on porting the heads or not, but I would refrain from doing so unless you (or anyone else considering doing this) truly know what you are doing, and are familiar with LSX heads (coolant passage/fastener boss proximity etc...). A skilled ports man can greatly improve upon a 243 casting (be it CNC or hand ported). Cartek, Wilson Manifolds, Livernois Motorsports & A.R.E. are a few great examples of competent porters that are up to the task.

Having worked as a cylinder head/intake manifold ports man for several years I can tell you that properly "hand porting" a set of cylinder heads is no easy job and definitely not cheap (I have over 50 hours in my LS6 heads). Port re-profiling is not guess work. You cannot just start removing material because you think it is a good idea. At the very least you would end up removing inconsistent amounts of aluminum from runner to runner (unless you plan on measuring each individual runner volume). Most importantly, you run the risk of diminishing velocity to the point of actually decreasing "mid-lift" volumetric efficiency by removing too much runner material (assuming NA 346ci here).

With that said you could always take your 243 castings to an engine builder/machine shop that can run a CNC porting program on them (this is what most shops have turned to in order to maintain consistency and also to cut down on expense). Prices for CNC work range from affordable to insane depending on the shop. If you really want to save some money, but also want great performing heads look into Texas Speed & Performance's P.R.C. line (226.5cc CNC ported 243 castings):
http://www.texas-speed.com/shop/item...d=649&catid=40

 

I have a set of the Cartek stage IV heads and the stage II cam and I made 453 and 400 to the wheels. They may be for sale soon. Im thinking of going with some equally ported, polished and milled Trickflows.

 

thanks for the info guys,

jdaniel i heard the trick flows are working really well for these cars. and what other bolt ons do you have on your car because i rear wheeled 434 with a cam and bolt ons. i am hoping to gain around 50hp with some heads. or waitn on some responses to see what anybody gained porting the stocks.

 

What modifications do you currently have (cam specs, exhaust, FAST 90/90, etc, etc)?

 

silentfright i purchased the car with all the mods done already. i have a futralmotorsport f14 cam not sure of the exact specs. headers, no cats, b&b exhaust , underdrive pulley, vararam.

 

My car has the following mods. Engine wise its just LT headers (full exhaust), 90/90 Intake and TB, Heads, and cam. Here is all the other.

-Cartek Stage 4X heads. Includes, full porting heads intake, exhaust, and combustion
chamber, Manley sever duty stainless valves, 2.02 intake, 1.57 exhasut, seals, Manley dual springs, spring seats, seals, titanium retainers, milled .030, cleaned and assembled.
-Custom grind Cartek Stage 2X Cam computer
verified.
-LT headers
-Bassani O/R X pipe
-Borla Stinger catback
-Cromoly hardened push rods.
-Cometic heavy duty head gaskets.
-Port intake to stage 4X.
-ASP under drive pulley with belts.
-Roll master dual roller timing chain.
-Z06 oil pump setup for the roll master.
-FAST 3 piece intake manifold ported with a 90MM throttle opening.
-LS2 ported throttle body.
-ARP head studs,
-ECU Reprogram 97-2004 LS1 full dyno tune.
-Notched pistons for clearance.
-Complete NX system installed includes, NX wet kit with 10# bottle, purge, MSD digital RPM window switch, timing retard module, custom switch panel with micro switches and LED lights, all wires, Bosch relays, and labor to install. Also includes, blow down tube, full throttle switch, Kenny Bell Boostapump, and NGK TR6 spark plugs.
-Nano kit.
-New 4.10 gears.
-C5 and C6 passenger side 300M out put shaft with side gear.
-Hardened out put shaft.
-C5 line lock kit includes pre-bent line with braided flex hose, inline line lock solenoid, and switch installed.
-Vararam intake
-Vararam powerduct airbridge
-GM Racing spark plug wires
-160* thermostat
-New Coolant crossover
-CCW 505A 10" wheels in the front 11.5's in the rear
-B & M Ripper shifter
-Lowered in stock bolts