dnapier4

I have researched as much as possible on this subject, but I would like to hear the opinions from people who have used the above noted heads. I already have 241 heads (04 GTO), and I like the idea of using what I have. But I read that its virtually worthless to gain anything despite the claims of Advanced Inductions 219cc CNC HCR 241 head. If it helps any, the cam to be used is going to be either a 224r, or 228r w/ a 112/113 lsa. Let me know what you think.

PREDATOR-Z

The claims of AI are well founded and heads ported by them yield results.
Now the first thing you'll hear is "243 or 799 are it". Yes they are the best stock casting but in ported mode (by a pro-shop), standard LS1 castings will hold their own to within 10>15 hp of the 243/799 castings. If that much is worth additional $$ from your pocket, then by all means, otherwise their 219 cc high compression program is legit and good value for the $$.
Then the above heads should not even be compared to one another, not apples to apples at all. From personal experience, I would take AI products any day. Porting and "porting" vary from one another and AI did their job well every time I've used them.
BTW instead of a 228R, I would look at a 228/232 111 LSA, something to that note. Talk to Pat G or Ed Curtis, they have access to a plethora of lobes.

mark21742

I'll just second what Predator said and add to it that I an running and love my worked 241 heads

DSRE

iTrader: (7)

Definately AI, Although they may Flow Less Peak CFM than your other 2 choices here is why i would choose the AI heads fwiw
1. Better Chamber design on the HC 241 heads because they weld it up and then machine it to a Much more desirable shape than even the 243 heads In my opinion, much more like an aftermarket casting, This Will allow a little more compression ratio which allows a little more camshaft, Flow better, and be a structurally stronger cylinder head
2. they are on the medium-small port side of things at 219cc which will really help the 346 guys out even the guys overcamming their ls probably will still produce decent part throttle drivability especially if they take advantage of the higher comp ratio
3. if you are going for 450rwhp these seem to be a good deal $ wise and will hold their value because they are machined by a good shop, if you want closer to 500rwhp you'll need more head IMHO, I'm no AI Nuthugger but they are the better Budget minded "Do it all" head you out of what you listed

Damian

iTrader: (89)

A.I.

And use a split pattern cam. Single pattern cams make absolutely zero sense on an LSX engine in terms of valve events and flow characteristics of the engine. A 224/228 or 228/232 like Predator said would fit the bill.

PREDATOR-Z

Sometimes when everything we know wrong proves right, then it is simply "logical".

Would you like to talk about "reverse split cams"?

mark21742

Lol I still don't understand the principal or why reverse split cams work.

Damian

iTrader: (89)

Indeed, sir.

Reverse split cams were initially designed to help "crutch" the lack of intake flow from the original LS1 intake manifolds. When the TR230 had so much success, a few vendors were like "WHOLIE SHEET we can make money off this!" and decided to flood the market with the reverse split idea for a while. Eventually it died off. Rightfully so. The birth of the LS6 intake totally canceled out the necessity for a reverse split camshaft.

PREDATOR-Z

Well, good soldiers never die they just fade away. There are still a few affection-ados amongst us, Elliot, myself tend to use them in setups designed to harness the benefits of such cams. When using unconventional methods, gotta think a bit outside the box. Cam choice is relative to what you use it for.

This is what I use them for (circle in red)

TXZ28LS1

iTrader: (5)

Predator, was that RMTT setup?

I made 395rwhp on stock heads with my old X1. I know dyno numbers dont mean crap, but considering how quick people are to diss these cams. Hell i made just as much if not more than most people with a "Traditional" or special custom cam on a LS6 intake, and my cam is like 6 years old.

PREDATOR-Z

Yes it was. I duplicated it in my C5 and the results are in my sig. Similar graph.
See most people want top Hp numbers, while RS cams are not designed for that. The area under the curve is where the RS cams shine. Since that is the rpm where I spend most my time, that is where I like the trq to come on.

Damian

iTrader: (89)

I've seen it both ways. I've seen some reverse splits make the ugliest TQ curve on the planet (probably an improperly put together set up), but then TR230's make an absolutely beautiful TQ curve with stock heads.

They have their purpose I suppose, but I never use them.