Advanced Induction 241's gain 41RWHP/32RWTQ (Stock Valves!)
03-30-2011, 11:22 AM
#23
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not taking sides or trying to argue,but 5-7 % increase seems a little high.of course other factors come into play that could affect that number..
03-30-2011, 01:15 PM
#28
You inferred that most believe 241s cannot make good power, and that this example did it with stock valve size. The majority of the gain came from compression, which can be had regardless of the casting number, who did the portwork, or the valve size. That's all. 
03-30-2011, 02:29 PM
#30
I have nothing against AI. Your post was misleading - like most stuff posted on the internet You inferred that most believe 241s cannot make good power, and that this example did it with stock valve size. The majority of the gain came from compression, which can be had regardless of the casting number, who did the portwork, or the valve size. That's all.
You inferred that most believe 241s cannot make good power, and that this example did it with stock valve size. The majority of the gain came from compression, which can be had regardless of the casting number, who did the portwork, or the valve size. That's all.FWIW, I've gained 40hp with another set of A.I. 241's on another car with only .018 shaved off.
Last edited by Damian; 03-30-2011 at 03:05 PM.
03-30-2011, 04:12 PM
#31
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Great numbers!!. Im pretty sure the compression had a little something to do with it. Don't really see what the argument is about? But anyhow good work from AI as usual.
03-30-2011, 05:17 PM
#32
Do you build engines as your profession? So you're saying I can shave a 241 down and make 30 more hp with no port work? You are wrong. I've cut heads .040-.050 many years ago on other castings while doing cam swaps, and they never picked up 41/32. Whatever your personal agenda is against A.I. isn't my business, but saying the compression was "the majority" of the power gain is a crock. You don't know what you're talking about, and I'd appreciate you staying out of this thread. Thanks!
I would appreciate YOU not putting words in my mouth. I never claimed the entire gain, or nearly the entire gain was due to compression. I said nearly half. HALF.
I don't know why you assume this a personal attack against you or AI. With you being so defensive and taking a stance like this over an issue you're clearly wrong about, I really question the statement you made about having nothing involved with AI.
03-30-2011, 05:52 PM
#34
I do not work for A.I. I do promote their products because I feel, based on real world results, that Phil @ A.I. offers the best CNC programs for GM castings. This isn't the first set of 241's the they've done for me, and it won't be the last.
We done now?
03-30-2011, 10:16 PM
#39
PTV was not bad. According to the PTV figures I acquired when putting this engine together I could probably squeeze a 228/232'ish camshaft in there and still have adequate room as long as we had a good valve spring and stability in the valvetrain.
03-30-2011, 11:17 PM
#40
I never did say that sir. But the added compression is not 50-60% of the gains like some people are trying to suggest. A full point in compression increase will equate to roughly 5-7% power increase.
These cylinder heads will shine much better once we get rid of the air restriction (LS6 intake) and go with a bigger camshaft that holds the valves open a little longer. I'd expect to see another 30rwhp out of this setup with a better cam and FAST setup. 450-460 is nothing to sneeze at through a GTO IRS drivetrain and heavy *** GTO wheels.
At the end of the day, I just build these engines. I don't sell the products.
These cylinder heads will shine much better once we get rid of the air restriction (LS6 intake) and go with a bigger camshaft that holds the valves open a little longer. I'd expect to see another 30rwhp out of this setup with a better cam and FAST setup. 450-460 is nothing to sneeze at through a GTO IRS drivetrain and heavy *** GTO wheels.
At the end of the day, I just build these engines. I don't sell the products.
I do have a question about compression, dynamic compression actually. This is one of the things that I have read about but don't fully understand. From what I have read, albeit wrong probably, that with a smaller cam you can have too much compression?
I know what I am thinking in my head but I don't think I'm saying it right.
Let me try it again. Can you have too much compression running a smaller cam?
Thanks!