Freestyle Feedback on Mag impellers in OEM pumps

[D-Roc]

complete pump or just a prop and vein section?

 

[chriselmore_1]

In my opinion if your going to buy a fancy motor, a mag pump is a must, if you plan on cheaping out on such a key ingredient than save your money on the motor too..

not everyone has the money to buy a pv stroker, a hull, and a mag at once. Some good deals came up on a pv motor and my hull fell into place so I jumped on it. A mag will have to wait. Besides... I've rode some really well set boats with tbm stuffers that hook up just as good as a mag. Mags are alot more forgiving to tune and not many people are willing to spend the time and money to tune their motor/pump w tbm to match and just say they garbage or not worth it. No it's not quite a mag but they are awesome if you spend a little time

 

[D-Roc]

tbm are great for what you pay for. but like Jr said, if you got the hull, got the motor, then to dial it in to its max, you would want the real mag pump with the set back options, adjustable reduction nozzle rings, and different tail cones. you think a stock pump is hard to dial in? try a mag. for the most part the oem pump works fine, tbm a bit better once you dial it in. most people don't need fancy motors, or hulls but after you buy everything else, well yeah, a mag pump is just the icing on the cake.

 

[WaveDemon]

is there any reason to have a mag pump with a stout 701 (no complete engine/exhaust packages from a builder) and a stock hull?

 

[D-Roc]

johnny haggest had a mag in his stock hull with a fancy 701 and it was amazing how well it ripped. he was waiting for his real motor at the time but it still worked awesome. i think it is the part that will work in all combos of hulls and motors because of its adjustability, but cost is high so most people cheap out. same as total loss. It makes a big difference but cost for one part scares the cheapos away.

 

[WaveDemon]

I'm thinking aftermarket motor comes after programmable ignition/hull/pump when building piece by piece.

 

[D-Roc]

It sounds good on paper, but yah part by part over seasons is a tough way to go without making wrong purchases. most people right off the bat start with making more power from a pipe and ignition, and then buy a better prop/grate. (not a mag) With going to an A/M lighter hull setup, it should feel like making more power without changing the motor. I built up my motor until my prop slipped, (not cavitated) I bought the tbm and prop to compensate and don't mind that it makes the motor work a bit. I made my hull setup as light as i could and after 10 years of riding skis finally bought a built motor. I am lucky that it is not too much for my driveline setup. Going with a bigger motor i think that i would want to have a mag pump already so that i know i could get it dialed in. If my pump got wasted, i would think of getting a mag pump, but for now what i got works.

 

[XJCrawler]

This is MY experience so take it for what it's worth!

838cc Lamey, t/l, blackjacks, MS109, 85mm exit nozzle, blah blah blah. The C75 12/17 with a TBM is too much and slows my revs BIG time. I ditched the C75 and the TBM and went to a Hooker 10/16 and love it. Also have access to a Hooker 9/15 and love it as well-can't FEEL much differerence between the 9/15 and 10/16.

Did Jetworks pitch the C75 for you?

 

[GIL]

Did Jetworks pitch the C75 for you?

No, the C75 was before Jetworks re-ported my motor.

 

[Waternut]

I'm thinking aftermarket motor comes after programmable ignition/hull/pump when building piece by piece.

That'a assuming you have every intention of getting all of those parts in a very short amount of time (short enough that no new hulls or motors come out that you want more). In actuality, we get the ignition to give us a little more oomph. Then a decent motor comes next. By that time you've decided whether or not jetskiing is what you like or not. Then when all of that gets boring, you either quit jetskiing or go with a stronger motor or a lightweight hull. Then when you've gotten to the point that your stock pump is on the edge of being effective, people start convincing you that you need the mag pump to move any further.

You don't put drag slicks on a miata because you think you might put a V8 in it a couple years from now.

 

[D-Roc]

uhm yeah, it would allow you to rev it and dump it and hook up to get you going faster than with stock tires. do you spend the 600 on the prop and tbm or save a bit more and go with the mag pump that you will be able to use with the 701 upto 1000? there is no real answer, i tried my best to allow room to build into the parts. my motor was the last thing i bought and if my ski goes lighter or makes more power i have two more tbm cones i can try to keep the motor from over reving. the mag is even better for tuning but alot more $$$$

 

[XJCrawler]

No, the C75 was before Jetworks re-ported my motor.

Art was saying he could custom pitch a C75 impeller for my bigbore and it would hit alot better than a 10/16 hooker

 

[Jr Freestyle]

Tbm $350 , big hub prop $300 = $650
jetmaniac mag is 1200 with prop .
If your spending 3-6k on a motor whats $ 550 dollars more for a night to day performance difference

 

[D-Roc]

yeah that is a good deal but what does that all include?

 

[Jr Freestyle]

12 vein set back pump, set back drive shaft and prop.
You can use your oem impellor housing and you ready to rock

 

[D-Roc]

what about tail cones and reduction nozzle?

 

[WaveDemon]

That'a assuming you have every intention of getting all of those parts in a very short amount of time (short enough that no new hulls or motors come out that you want more). In actuality, we get the ignition to give us a little more oomph. Then a decent motor comes next. By that time you've decided whether or not jetskiing is what you like or not. Then when all of that gets boring, you either quit jetskiing or go with a stronger motor or a lightweight hull. Then when you've gotten to the point that your stock pump is on the edge of being effective, people start convincing you that you need the mag pump to move any further.

You don't put drag slicks on a miata because you think you might put a V8 in it a couple years from now.

I think your compairison is really poor but i'll go with it.

Everyone is motor OBSESSED. Just like in the car world. People love to cram giant horsepower in cars with stock suspension and street tires.

Since I don't give 2 s about flat water, I'm convinced a nice limited motor is all you need before you move on to other mods. 6-10k motors are fun to talk about but not the point of riding or the key to the next level of riding.

 

[motoman96]

I was running a 10/16 hooker in my fx1 and loved how hard it loaded the pump. It grabbed instantly an I never had anything bad to say about it. I just snagged a mag pump today for the rev with a stroker motor, so in the am I'm gonna call Art an have him bend me up a prop for my setup.

 

[OCD Solutions]

ScottS and I probably have the the best side by side comparison available with our Trinity ski's, for surf anyways, not sure how true any of this will be for flatwater or racing but I offer it up for discussion anyways.

Our hulls are the same length now. Our engines are the same displacement, (846cc). Our EPICs run vey similar curves, Our handpoles are the same length, our rideplates are the same length. The only significant difference between our skis is the intake grate and the pumps. I run a 144 setback mag with a c75 14/19 and Worx 201 while Scott runs a stock pump with a TBM and C75 13/18 and a JetDynamics intake. Riding these two skis back to back, there is very little difference at all but the difference definately is due to the pump. The Mag pump hooks up sooner, has better thrust and corrects the ski instantly when power is applied but... I wouldn't rule out the stock pump with a TBM and C75 so fast either. While there is a difference, I don't know if it is enough of a difference to warrant the cost to upgrade. The stock pump with C75 and TBM also has decent hookup and thrust while still allowing the ski to slide out a little more and actually slashes a bit nicer so you really have to decide how you want your ski to handle.

Scott and I switch back and forth quite a bit when we ride so we really get to taste the best of both worlds in a true back to back comparison. The differences are very slight at this point and it would actually be very hard to tell them apart if you didn't look down and see the color difference. If the setback Mag is a 10/10 then the OEM pump with TBM and Skat impeller is at least an 8/10 and I can't help but wonder how much of that difference is due to the setback option alone.

Scott would be a good one to weigh in on this topic as he is wrestling with the decision to buy a Mag or not. Everytime we ride, he is evaluating the slight differences and weighing the pros and cons to each. I really don't think there is enough difference to justify the upgrade for him but time will tell I guess.

Bottom line, if you don't have the money for a mag then the C75 impeller with a TBM stuffer will definately do the trick until you do.

 

[OCD Solutions]

I also just upgraded my Wife's ski from a stock pump with a 10/16 Hooker to a 140mm, 8 vane non setback Mag pump and the difference was definately noticeable, even to her. I was always very pleased with the way the 10/16 hooked up but the Mag is just that little bit better and resolved the slight hesitation I was feeling out of the hole and in the white water.

IMO, Mag pumps are very much like lightweight flywheels. The differences are very slight and sometimes not even noticeable but after riding with them for awhile, you can definately tell the difference when you go back to a stocker.