SoCal Jet Boats
Tech Talk => Jet Pumps => Topic started by: bigred88 on June 16, 2013, 10:02:52 PM
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Just got new msd setup motor seems to be beggin for rpm the old mercruzer ignition had non adjuatable rev set at 5000 how much rpm is to much for an energized jacuzzi yj really dnt wanna spin the new motor to the moon but would 6000 be ok wanna few more mph and u guys think and energized yj ever see 70mph? Or is that impossible?
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There really isn't any reason your pump won't push the boat to 70mph.
But, you might find that even without a rev limiter you might not have enough horsepower to spin it to 6000rpm. A jet pump works a lot like a dyno, it'll suck up every bit of HP you can throw at it, then if you're lucky enough to overpower the pump, you upgrade the pump and start all over again trying to make enough HP to overpower the pump again ;)
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Thanx again crew u have givin me much info on many of my post u da man
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How fast was you going at 5000 rpm. with the yj energizer kit. how big is the boat.
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I havent got my gps yet and havin lil carb trouble wit my shitelbrock dnt kno how much my "feel" meter is kinda embarrased thinkin maybe 52? Maybe les maybe more just didnt wanna get my hopes up maybe hopefully 62????? The boat is 18.5 looks like Hawaiian tittle says aqua? Was actually lookin for lil info on the hull? Its 1977
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With an Energized YJ, loader, and Place Diverter on my 19' Charger, we've been able to hit a best of 64 MPH.........downriver..........with a tailwind........running solo. :sly:
Now granted, it's a big, heavy sucker running a warmed up Olds 455, so I don't think 70 is out of the realm of possibility/probability on your float.
Sergio is the "caretaker" of my boat, buying it at some point, or so I'm told, but both of us try pretty steadily to blow up the Olds so we have an excuse to throw a 460 in there. Fugger won't co-operate and just break! I'm pretty sure if I toss another 200 or so HP at it and swap out the B impeller that's in it (Most Energizers were equipped with a B, just an FYI) with an A or an AA I can get the Turd to hit 70.
I've got a built 460 here to do it, but I've also got a newfound respect for the Olds 455. The life it's had before I owned it not even into consideration, Sergio and I have BEAT the LIVING SNOT out of this thing, and the jury's out as to whether it's co-operating or NOT co-operating, depending on how you look at it.
Ray
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Thanx rebel thatbgood fyi im actually tryin to id my impeller at the moment its pretty tough from previous owner it does have an A im new to jet pumps I can see it but cant id it by visual may be a dumb quesyion can anyone id this by this pic possibly??? Socal rox great ingo thanx again to all makin me feel btr bout the boat
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O ya I wanted to ask what rpm were u pushin dwn wind at 64?
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To Identify the impeller, the bowl is removed, or a 'bore scope' to see the back side of the impeller, for the letter stamped in it. (the letter does not always match the cut of the impeller, best way is to measure it with bowl off) The pics are of the 'stator' veins in the bowl, not the impeller. My best wild azz guess would be an "A" impeller. The H.P. to spin an "A" @ 5K is ~450, and 6k is ~775. I'm swinging a "AA" at 4900, 5000 in cool air. (Berk JC, A/T AA imp, 454)
Daniel
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Thanx daniel I was thinkin yhat after what crew said u worded it lil better for me im thinkin im right at 450-475hp so as crew said I need more money for power thanx again daniel u made that very easy to understand man that a big jump in power for 1000 rpm?
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