You seem very hesitant to go head to head with me in a HP contest, your terms are far fetched. For years I have wanted to go head to head with Bob in a HP contest, I dont claim to be a boat engine builder, but I do think if you were to team up with Bob and build a production based 454 with aftermarket heads, on pump gas you would more than likely lose in a HP contest. Now that being said, I cant imagine any engine builder/machinist backing down from that challenge like that, but it does happen a lot on the internet, for one time in your life Bob step up and say come on Mark lets see who makes more HP, forget the crazy test parameters, I will be the first to say I have no experiance running engines for 20 minutes @ full power, but I do have experiance at making HP, and I do have the experiance machining the engine. Mike Lewis's place would also be an excellent place to settle this.

well i see you have never done a poker run because if you had you would know 20 min is very common , i have been in and driven boats where the throttle was on the stop for 2o plus miles many times.

How do you figure Haxby is hesitant? All he said is "the one thing set in stone is the engine must be tested WTO for 20 minutes".

vortecpro has been on every forum you can think of stiring this same crap

Yea, Ive been calling out Madera for quite some time.

You seem hesitant to post your dyno sheets...........your dam right hes hesitant, because hes knows hes not going out power me. You seem very hesitant to go head to head with me in a HP contest, your terms are far fetched. For years I have wanted to go head to head with Bob in a HP contest, I dont claim to be a boat engine builder, but I do think if you were to team up with Bob and build a production based 454 with aftermarket heads, on pump gas you would more than likely lose in a HP contest. Now that being said, I cant imagine any engine builder/machinist backing down from that challenge like that, but it does happen a lot on the internet, for one time in your life Bob step up and say come on Mark lets see who makes more HP, forget the crazy test parameters, I will be the first to say I have no experiance running engines for 20 minutes @ full power, but I do have experiance at making HP, and I do have the experiance machining the engine. Mike Lewis's place would also be an excellent place to settle this.

This is OFFSHORE only. Not a drag strip site. We run more than a single dyno pull everyday. The last run I did in a boat was 18 miles @ 5500 RPM. Its the nature of the beast here.You challenged, HERE and your challenge was accepted with engine, place and a whole bunch of major industry players to watch the dyno pulls.

You have tried this dyno challenge on just about every website out there, and then called everyone cowards because they wouldn't do it. While, now you have your Yes, so Put up or Shut up.

To be brutally honest, because of the above you really have no place then on an offshore site.

Where I boat, we have been known to run 40 minutes or more at WOT. It's the same in many other places. As mentioned, Poker Runs are a favorite and those can run a good chunck of the day at WOT.

So, because of the nature of the peopl here - offshore boaters (see the name of the forum ?) I would either put up or shut up. Again, being brutally honest.

Dyno in the world we live in or drop it and go. One or the other.


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As mentioned, I will lend either camp a helping hand during the dyno competition. I know extra hands are always helpful. PRI sounds like the best time to get this all together.

You in ? Or you out ? Simple answer.

John Lingenfelter squeezed 504 hp @5000 out of peanut ports (jan 1993 hot rod). Now, this was a car engine, and whether it could hold to the HP boat world is questionable - but they will pump more hp than people will admit (but I've never seen 560 as stated here), and not on one of those fairy tale dynos most car mags use.

OK- Here it goes! My engine was never dynoed, I never said it was dynoed. My boat is a Formula 242 and to make it go 68 MPH you need at right around 525 hp! There are many 242's and all need the same power to go that speed! So there are my dyno sheets, don't like it to bad. I don't need a piece of paper to make me feel good nor do I need to come on to a forum where everyone gets along and is basically one big happy family and start a fight. Everyone here helps each other out unlike you that is here to settle some score.

The only person here that is a wuss is YOU! You asked for a challege, you have a challenger. The deal is your building an engine that can be punished not some wuss auto engine that has to last for an 8 second run. If you can't build an engine that can run WTO for 20 minutes, if you can'd do that then take your peanut ports, go home and shut up! Otherwise be a man, build your engine and prove your point. Problem is I think you know your all show and no go! Your already trying to put words in peoples mouth that they didn't say, such as Haxby being hesitant. Haxby has accepted your challenge, now you're trying to change the rules because your in a corner!

As to me challenging you when did I say I wanted to challenge you? Either way here is my deal! Build a 427 that will run in a boat with wet exhaust, Idle for 15 minutes and not revert water, then run WTO for 20 minutes. I'll bring my engine that has 50 hours on it and I promise you your peanut port, flat tappet engine won't even be close. If you want to do that, I'm down but the engine is being dynoed at Daves shop! I have no desire to ship an engine all over the country to prove a point to someone I could care less about!