You have 502/415HP intakes. Even if modified, let me guess you have under 550hp ?

Oh, I get why everyone is confused.

Page 1 and 2, you said 502MPI's where coming out and he was building you a set of 500EFI's.

Me comprendo.

What you should have said was he was going to build you 500HP engines using the MPI intake and fuel injection system.

Again, big HP differences/limitations between the 415MPI/500EFI/ and just to throw it in their, 525EFI intake set-ups.

All figured out now.

I did not read whole thread, but if for some reason the thread is this long cause you don't know why it didn't make more power it's because you had him build you 500HP motors and thus why the MPI intakes where kept.

If you understood what hp he was building you, as it seems you did by saying he was building you 500hp EFI engines, then all is well and enjoy your new motors.

Is this going to turn into a sales pitch for those Tyler Crockett intake and throttle bodies that's been for sale for a few months on swap shop? I hope not. I really have no idea if any or what has been done to my MPI set up. I hadn't talk to Ron about it what so ever at this point. But what I think about is he wouldn't work with anything used on my motors what so ever and I wasn't sure what I wanted or even needed in this area to spend $10,000 on it. What I can say is my boat ran 78 MPH with two 415 HP 502s that were getting water on the top end. Imagine what will happen with 2 brand new 540 Stroker motors with new headers and the whole deal. If I need the fuel systems I will call Arizona speed and marine not Tyler Crockett. I hope it doesn't sound like I'm snapping at you because I'm not. I could have had anyone build my motors that I wanted. I chose Ron Potter because he is the best in my opinion. You can talk to anyone he has built for and I don't think you will find one dissatisfied person. At least I couldn't. I talked it up on here for over a month and every builder except Ron had someone say something derogatory about them. Weather they didn't feel like they got what they paid for down to they paid way too much for what they got. Some even had to fight about warranty work and worst of all some had motors that kept blowing two and three times. This was one of the things I got on Tyler. One guy told me that he had two built by him and one blew. He took them to some one else and the motors had some of the same parts that were in them before the build. I really don't know because I don't know the man and I have never had anything done by him. All I know for sure is he has been around for a while so someone uses him for sure. What I do know for sure is no matter what we do none of us are ever satisfied with what we have done or the speed it gave us. We would all do it different to gain another 2 MPH this is what makes this stuff fun I guess. That and we all like the challenge of trying to make something better. Weather we make it better or not is a matter of opinion most of the time. I appreciate your input. I have learned some stuff on this site and this how we get it so keep it going.
Thank You.

The thread went the way it did because everything changed mid stream. The motors started out to be a shade above stock or what ever HP he could get using those fuel systems. So thus we began the build he explained to me that HP didn't mean crap in a boat unless we were talking about a CAT which of coarse looses a lot of drag when it gets on top. A vee bottom boats lives and breaths on torque basically because the drag reduces very little once on top. So we started out boring to 509 and reusing the cranks and balancers. Once he got started he had a change of heart and called me at the office saying he wanted to bore them to 540 and put stroker kits in them. We talked about why and what price difference this would be. I gave him my blessings on it. Once all of this was said and done we have killer motors that lack the fuel systems to make them really put out some good HP. I see it now were as I didn't at first but the build changed in the middle. Ron was right about the torque we have 620 FT LBS of torque. You are also right we have 532 HP I think it was. That's why I said if the fuel systems is what I need at the end then this can be done with out a major undertaking. Keep in mind that my fuel regulators were bad on both motors at the time of DYNO so this will have a increase as well. Let me know your thoughts. I'm interested in hearing.

Everyone has been confused because I have been confused as well all the way threw this deal. I can do things with a boat that most wouldn't know a boat could do. I have been running boats since I was 4 years old. I was raised third generation commercial fisherman. But having a boat like I have now has always been just a dream to me. I remember standing on the docks when I was about 10 years old and watched the first performance boat that I had ever noticed before. I thought man that thing is awesome. One of these days I'm going to get me one of those. 30 years later and a career change and I have one. Still doesn't make me a gear head on gas motors because we always ran diesel motors in everything. So this is the first set of motors I have ever had built this way. So sorry if I have confused everyone with that way I worded things.

No big deal. Seriously.

I'm just sure some people reading this thread for more info got confused. That's all.

Example: I see on the net and get calls all the time with people having performace/drivability/or etc problems with their HP500's. Many times, after many questions, sometimes days worth, I find out they are not Hp500's.

The deal with that is not to put the person down, it's so I can get real info to help. I don't care what they have per say, I just care I get the correct info so I can help.

So...someone mentioning a 500EFI, since Mercruiser termed the engine name for one of their motors, most people aare going to think it's an actual 500EFI.

Again, just making things clear for others.

Hope you understand. Nothing for you to be offended by what I said.

You sound exactly like me. I grew up fishing bayous and inshore with my Dad since age 6 with 7.5 hp hand carried outboard motor and 6 gal tank and renting 18' aluminum boats. Those were some wonderful memories. We didn't have much money. When I saw a boat with this enormous 100hp outboard and a steering wheel I was awestruck and said one day I'll have one of those.

And I wasn't offended in the least by it. Like I said before this is the first time I have had a motor built other than diesel motors. This started out looking for 500 HP period. After the way Ron built them for the torque I now see that just the change of the fuel systems could make these motors a lot more than they really are. Will I make that change right now? NO I will not I want me boat back in the water so bad I can taste it now. I pushing the 8th month now and still I haven't even heard them run yet. I honestly have spend enough money for a set of whipple motors and here we set talking about these old fuel systems making a huge difference in what I have paid for. Am I happy about all of this of coarse not. I just want it over. I go threw the classifieds all the time and I see motors with a whole bunch more power then mine for half the money. I wish I had just went with new crate motors from Mercury. I might have but the sales rep was too busy trying to sell me a set of 383s.In stead of what I wanted. I thought this guy is out of his freaking mind. The rest is history.

Your gonna love the new HP and you learned something along the way so this is a good thing. Plus u will have some engines that will last for years. Now just hurry up and get her running so we go do some boating together.

Good catch i thought he was starting with 500 efi slso
QUOTE=SB;4146103]This thread get's confusing as some people are comparing 500EFI builds vs the OP's 415MPI build.

The MPI intake is hugely restrictive. The 500 EFI is much better, and just to mention it, but restrictive enough that it is hard to get 600HP or more on the 500EFI intake without major mods and thus why Tyler Crockett made a top mounted throttle body mod to the 500EFI intake to get well into the 6's.

When an intake runs out of breath, it runs out of breath. Thus why HP will be limited. Simple laws of nature.

A 10$million dollar longblock under a NA 415/MPI intake isn't gonna be a world beater.[/QUOTE]