That's a big jump. I wasn't sure if it was continuous duty or not. it showed the fuel controller to work with it. You run yours with a relay and no controller? Sounds like a winner and works great for you. I wonder if there are any downside to too big a pump? I guess if the return and regulator flow enough, should be fine. And the boat is plumbed for -12 in and -10 out. And -10 to the tank, I will have to remove the old pickup which is a -10 but has a 3/8 down tube, I wanted to return thru a down tube to the bottom of the tank to keep aeration down when the tank was a little low. I will just drill it out to -10 or at least -8 whatever size tube I can fit. Weldon recommends a -10 return.
You are not running an 02 in the boat are you? I am going to set it up on the dyno with a wideband and when its set go to open loop, I really am not confortable with a o2 in the boat, if it takes a crap Im in deep water. and it only takes a slight reversion in the exhaust to put a drop of cold water on the 600deg plus sensor and poof. I would like to but dont trust it.

Thats right... I am confused myself. It should be enough, but its not. The pump is new 1st use, and the pump on the dyno was worse. Maybe im making more power than the dyno is reading? i really dont get it and thats not like me. Maybe a bad pump, but Im not going to try another like it.
Give me a call im home we can talk if you have the time.

even put a battery charger on it to make sure voltage was up??

Don't think you want to wind yours quite as high. http://www.youtube.com/watch?v=bJy9nX3tuPw

Wow, yeah I will try to stay below 8 grand... But you know it only takes one guy to be next to us and we may need to hold it wot just a little longer whats a few hundred more rpms, lol

Great job Doc! I have enjoyed reading your progress. Could I ask for your recommendations on upgrades to a 26' Scarab with a stock 502 and bravo one. I would like to supercharge it but also would like it to be reliable. Do you think the 750HP is too much power for that hull?


Have you thought about a mechanical pump wouldn't it be better at supplying your fuel needs? It sounds like your lines are plenty big. Just out of curiosity what is the ballpark dollar wise that you have spent on this re-power?

M3 procharger will get you there.

As far as $$ spent, I stoped counting long ago. a lot has been spent in R&D, the next one will cost much less. Maybe 35K or so I would guess, plus the SCX upper another 10K, and I am sure I left some things out. and the new fuel pump 1,200 or so more. I figure once its done and the smoke clears I will sit down and take a look at what I spent. The boat went 90mph, I will have to see what it does and figure $$ per Mph..
Good luck

.

That's it just the M3 with the standard accompanying parts i.e. exhaust, ignition, fuel, and prop? No block work? The motor has 376HRS I think I should at least freshen up the heads.

[QUOTE=26Scarab502;3128400].

Maybe you should start another post, it could go on for a while.
You should start with a topic maybe 26 Scarab with 502, want to run ???mph, fill in the blank.
Then fill in how much you want to spend and you motor being stock, what drive...
so the answer to your question. M3 on a stock 502 yes. it will give you some room to grow, a m1 will also work but leave no room to grow if you modify your engine to work more efficiently with the blower.
Should you do head work freshen up, maybe, should you make it a 540-572 sure, maybe 8 to 1 compression while you are there, hey just order new AFR 357's and maybe go right to an M5.. what im getting to is you need to do what works for your budget and meets your goals. The combinations are endless. The M3 is designed for a stock motor but will work better as all superchargers will on modified motors. I gave you only one of the many options an m3. on a solid stock 502.. The M3 comes with directions and what you need to do with the fuel system. You can add more like a better flowing exhaust if you want but not necessary, obviously the stock prop will not work anymore, so start a new post for yourself and you will get all kinds of ideas. a ton of reply's. Take the information and decide what works for you. But most importantly your goals and budget..... and remember some reply's will be from kids, and arm chair pros, others may be the real deal. So respect them all, never know who may be on the other end.. I've made that mistake once..... Good luck

Fair enough, didn't really mean to hijack this thread, I just read that you were a Procharger dealer and obviously you have done your research. Thank you for answering my questions.