sweet99ss

iTrader: (41)

I have made my mind up that when I do h/c I will go with a 228r cam on 112lsa for many reasons.... What I need to figure out now is what heads I will want to go with. I have researched and seen "buy the best heads possible" comments. So my question now is what are the best heads to match the 228r cam? Right now I am looking at either the PRC stg 2.5 heads or the PRC 227cc heads from tsp... How much hp would I pick up going with the PRC 227's over the stg 2.5 ls6 heads? Are there any better options out there besides the 227cc heads?

mark21742

You might give up some low end torque with the 227 heads in the lower rpms running on stock cubes.

mark21742

Maybe look at a 205, or 215

lemons12

iTrader: (71)

I would go with a set of AFR 205s... Would make some nasty low-mid range power and those heads can hold their own up top too if you decide to go larger down the road or more cubes.

Exidous

iTrader: (11)

I would go with the AFR 205's. My current heads and cam cost me a bit of low end but am going to go stroker (maybe) to fix that. Now if only I could fine a reputable machine shop on Oahu... :-)

Edit: My cam is on a 114 LSA. In retrospect I should have gone with the 112.

Are you looking for max peak or under the curve?

papermushrooms

New AFR 210's they are monster heads

sweet99ss

iTrader: (41)

Cool, where is the best place to buy afr 205's?

99Bluz28

iTrader: (35)

Here's probably the best price I've found.
http://www.ws6project.com/user_stor/...oducts_id=4558

sweet99ss

iTrader: (41)

Damn that is alot of $$$. I wonder how close a set of ported 853's by AI would be to these? If they could port them to make the same hp or more than stg. 2.5 ls6 heads I would be happy!

Exidous

iTrader: (11)

I forgot that the 210's replaced the 205's. They are spendy but you get what you pay for. They are incredible heads. I wish I had saved up a bit longer to get the AFR's

poloaa009

You might give up some low end torque with the 227 heads in the lower rpms running on stock cubes.

Jason 98 TA

iTrader: (4)

The PRC 227 head is the highest flowing production cylinder head for the 3.9" bore. The flow comparsion to a 205 or 210cc 15 degree head isn't even close. The great thing about the PRC 227 heads is with its altered valve angle & smaller chambers you can get a good compression bump and still have p/v for a larger camshaft if down the road you decide to upgrade!

You could consider the 215 heads, but honestly the 227 would be my first pic no doubt.

You might also think about the new PRC as cast. It moves over 320cfm and will be priced about $1800! Id easily put it up against any competitors cnc ported head.

sweet99ss

iTrader: (41)

So why on tsp's site does it say that the prc stage 3 ls6 heads are not recomended for stock cubic inch engines, but the 215cc and 227cc heads say they work great with stock ci and bigger ci??? How much gain would I see with the 228r/227cc head compared to the 228r and the stage 3 ls6 head?

Rise of the Phoenix

iTrader: (27)

If it were me, I'd go AFR all day long. You can comb the classified section on here for some AFR heads. I've seen multiple sets for sale. I believe there is a pretty new set of AFR 205cc heads for $1,400. You can't beat that. With a 228 cam, a set of AFR 205cc, 210cc or even 215cc heads will provide you with "useable", "under the curve" power, which is probably what you're after going with a smaller cam.

NC98Z

iTrader: (1)

Stage 3 heads are designed for larger than stock bore motors. They have bigger valves and require pistons with valve reliefs or flycut.

PREDATOR-Z

You'll need aftermarket roller rockers with every head that is running bronze guides; AFR is one of them. That is an added expense.
AI can do your stock heads, ask about Their 219 cc LS1 cnc head program. You can increase compression while maintaining stock PTV clearance. That would be my choice. AI's work is top notch.

Sales4@Texas-Speed

iTrader: (4)

Any of our PRC aftermarket heads do not require roller rockers. We have designed these heads to take the stock rocker with no problems. We use a very high quality bronze that takes a very long time to wear out so the stock rockers are no problem. We prefer to run those to most aftermarket rockers because of inconsistency.

If you are looking for a new aftermarket casting head but on a budget I would recommend you look at our PRC as cast aftermarket heads. They are a 220s runner head with a larger valve that will really increase power. I put them on my 01 z06 and picked up right at 30rwhp over a set of 243 heads. Take a look at this link and let us know if you have any questions at all.

http://www.texas-speed.com/p-3515-pr...ast-heads.aspx

sweet99ss

iTrader: (41)

Thanks for letting me know that! I think I'm gonna go with the 228r on 112 and the stg 2.5 ls6 heads. I just bought fuel pump with hotwire and 37lbs injectors to get ready for the h/c. I'm just scared my tranny isn't going to last long with the h/c setup. Not to mention I have a 100 shot on top of that LOL. I WILL NOT spray the 100 shot with the h/c until I get built tranny though

PREDATOR-Z

That is great news! How many live setups those 227 are running on? How many miles on these 227 setups? How many have you actually torn down and had measurements on guide wear with stock rockers? Can you share any data with us? Cams and lifts used? Was there less wear with sub .600 lift cams VS post .600 lifts cams?

Fbodyjunkie06

iTrader: (10)

We like to use Trick Flow Specialties heads on 99% of our builds and there is a BIG reason we do!