Which 6 bolt heads?
Thread Starter
Drifting
Joined: Oct 2011
Posts: 1,709
Likes: 16
From: pembroke pines (broward) florida
Which 6 bolt heads?
Decided to bite the bullet n opt for 6 bolt heads instead of a set of wcch stage 2 ls7 heads. That way if the hp bug bites I've got the heads for a aggressive build. Prob leaning towards a set of mast 305s but what other quality options should I consider? Prc 285cc heads? Rhs 291cc heads? War hawk 12degree heads?
Team Owner
Joined: Nov 2007
Posts: 24,035
Likes: 2,342
From: Gilbert AZ
Running PRC 285 without issue. Do you have a 6 bolt block or are you doing it just for the thicker decks or plans to upgrade later?
Any of them are pretty nice. The brodix look like a nice choice. Mast are good if you want to pay the extra.
Any of them are pretty nice. The brodix look like a nice choice. Mast are good if you want to pay the extra.
Thread Starter
Drifting
Joined: Oct 2011
Posts: 1,709
Likes: 16
From: pembroke pines (broward) florida
Stock block but if I decide to go crazy I have the heads to suit. Stock heads run out 900rwhp from what I've been told. Mite aswell invest in 6 bolt n sell mine off. Works out only a lil more than doin mine up. Also prc work out 3k with s/s valves n the mast are 3500 but most builders prefer the mast for quality n price. Undecided
Burning Brakes
Joined: Aug 2009
Posts: 841
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From: DFW Texas
Stock block but if I decide to go crazy I have the heads to suit. Stock heads run out 900rwhp from what I've been told. Mite aswell invest in 6 bolt n sell mine off. Works out only a lil more than doin mine up. Also prc work out 3k with s/s valves n the mast are 3500 but most builders prefer the mast for quality n price. Undecided
If the question is mast or PRC than mast for $500 is a no brainer. Not sure who told you a stock casting is only good to 900rwhp? We have made 1000 + to the wheels on 4 bolt stock casting plenty of times.My last motor made 1105rwhp and i'm confidant it would have taken more. Never turned it up past that.That was with a stock ls9 head. Little better casting but still. Your tuner is what matters. A bad tuner can push water in any setup. The WCCH ALLPro retro head would be at the top of my list.Along with the mast 305. If your looking for a budget 6 bolt than based on experience with the older cathedral castings from TFS i'd say their new ls3 6 bolt casting might be something to look at.
Drifting
Joined: Jul 2011
Posts: 1,629
Likes: 453
From: Finland
ERL recommended Brodix BR7 heads for 1k to 1.3k hp boosted application. Took those and complete long block they built should arrive now finally in next two weeks!!! 
Last edited by Tuomas FIN; Jul 24, 2013 at 06:54 AM.
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Thread Starter
Drifting
Joined: Oct 2011
Posts: 1,709
Likes: 16
From: pembroke pines (broward) florida
Thread Starter
Drifting
Joined: Oct 2011
Posts: 1,709
Likes: 16
From: pembroke pines (broward) florida
Team Owner
Joined: Nov 2007
Posts: 24,035
Likes: 2,342
From: Gilbert AZ
It isn't a $500 difference between PRC and mast, it is $1300. The $3500 mast have SS intake valves which is $2300 for the PRC heads. The $3000 PRC heads are Ti valves. Add $800-900 to the mast for TI valves which brings them to $4300-4400 for Ti valves.
Thread Starter
Drifting
Joined: Oct 2011
Posts: 1,709
Likes: 16
From: pembroke pines (broward) florida
Are u guys running the mast 305s running with the upgraded Titan valves or sticking with the lightened stainless valves on boosted applications where a huge cam
Is not required?
Is not required?
Racer
Joined: Apr 2007
Posts: 474
Likes: 0
From: westchester New York
I think my heads were 5300 and that was with CHE bushed rockers instead of the needle bearing ones. I believe they have inconel stainless exhaust valves and titanium intake valves they were also CNC ported. both Andy from A&A and seth from the E RL both recommended Richard at West Coast cylinder head. if your pricing out cylinder heads make sure you compare all the upgrades
Thread Starter
Drifting
Joined: Oct 2011
Posts: 1,709
Likes: 16
From: pembroke pines (broward) florida
Team Owner
Joined: Nov 2007
Posts: 24,035
Likes: 2,342
From: Gilbert AZ
Ls7 already has high lift and high RPMs so unless you want to downgrade from stock, I would do them. No other LS motor has a huge 2.2" intake valve. There is a reason they are Ti factory. People complain enough about a heavy SS exhaust valve, I don't even want to know how bad a SS intake valve that size with boost pushing against it would be.
Thread Starter
Drifting
Joined: Oct 2011
Posts: 1,709
Likes: 16
From: pembroke pines (broward) florida
Ls7 already has high lift and high RPMs so unless you want to downgrade from stock, I would do them. No other LS motor has a huge 2.2" intake valve. There is a reason they are Ti factory. People complain enough about a heavy SS exhaust valve, I don't even want to know how bad a SS intake valve that size with boost pushing against it would be.
Drifting
Joined: Jul 2011
Posts: 1,629
Likes: 453
From: Finland
I think my heads were 5300 and that was with CHE bushed rockers instead of the needle bearing ones. I believe they have inconel stainless exhaust valves and titanium intake valves they were also CNC ported. both Andy from A&A and seth from the E RL both recommended Richard at West Coast cylinder head. if your pricing out cylinder heads make sure you compare all the upgrades
• 1 set - BR 7 CNC Brodix LS7 CNC porter's casting.
• 1 set - DV-WCCHIVLS7... Del West Titanium LS7 intake valve w/ hard tip insert. C/N coated.
• 1 set - SL7047 REV Inconel exhaust valve. GM LS7. 1.615" X 8mm stem 5.230"
• w/beadlock groove. 45º seat angle.
• 1 set - CHE Valve Guide CHE Precision bronze valve guide
• 1 set - 221435-kit Manley 1.350" dual spring kit assembly (includes viton valve seals)
• 1 set - CHE LS7-N-16 CHE Precision LS7 rocker arm set. New rocker bodies (outright).
• 1 set - CNC BR 265-99-71 CNC Porting 265-99-71 for all Brodix BR7 castings
• 1 set - Hone to size Hone Guides to size
• 1 set - Comp V8 Competition Valve Job V8 Cylinder Heads
• 1 - Surface V8 & V6 Surface V8 Cylinder Heads .030" (to 65cc chamber size)
• 1 - Assemble Wash and finish assembly.
Racer
Joined: Apr 2007
Posts: 474
Likes: 0
From: westchester New York
Lol your post reads word for word what my receipt from WCCH says, the only difference is all pro and Brodix. I did not buy an assembled motor from Erl because I already had a boosted application that's why erl told me to get them from WCCH I was just making changes to my build because I wasn't happy with the horsepower output. I know you can't wait to get yours back together I'll be installing in about a week but I'm dreading the tuning process all over again