| Re: Engine Dyno Predictions: |
Subject: Re: Engine Dyno Predictions: by jsup on 2008/12/24 17:25:08 So basically what we learned here is what we already knew. That a CNC ported head will give 40 more HP than an as cast head. 1. Tony told me that, and he was right. We all believe Tony right? 2. Brodix says the same thing here's some video proof: http://www.corvette-guru.com/modules/ ... php?topic_id=6531&forum=1 3. This "test" (I use the term loosely) proves it. Therefore, as I initially stated, not really a fair comparison, was it? Given the 40 HP delta for the porting, I think we can agree I've been dead on saying they all perform generally the same, all within a hand full of HP of each other given how each likes the combination, when the comparison is fair. What I find puzzling is why Wes, who was saying he didn't want to drop $100 for a dyno run the other day, would buy Dart heads, sell them at a loss, then buy AFR heads, go through all the trouble of changing three sets of heads and gaskets, and pay for all those dyno runs. Why would Wes do that out of his own pocket? I really don't understand why "guy on the street" would go through the trouble. If for the goodness of your heart, thank you Wes, I wish the results were more earth shattering with all the money you laid out. Well, the good news is we can all now accept that a CNC ported head of any make, since we have both Brodix and AFR to point to, is good for about 40 HP on a big CI motor. I'd be interested to know where did you source the heads. Were the Darts off the shelf from a reseller? Were the AFRs or did they come from the factory for the test? Ringer set maybe? Let me close with questioning the parameters of a test to validate it basis and bias, is fair and is not whining. As to the resale, the reason is a lot like the resale for a Toyota vs. a Chevy. A Camry isn't a better car than a Malibu, but it resales better because of marketing and because there are far less of them and they are harder to come by. People will pay more because I can get Dart tomorrow and have to wait on AFR. I am not so sure why resale is an issue at all, how many change a set of heads a week, usually it's years. It's just not a realistic circumstance that matters. So can you please explain why you made such an issue out of resale other than to just point out a favorable point for AFR. Thanks. What we still don't know what the Darts would do with some light porting. People swear they respond real well. That probably would have changed things a bit and been a bit more fair, not totally, but a bit. Merry Christmas all. |
