Mag Pumps Are Heavy

[RMBC Freeride]

so you found a 144 mag prop that works well? Wich one, Toby wants to try it w/ his TBM.

Skat mag prop: C+75 (144mm) pitched to 12/15 by Impros. But I still need to bore my nozzle to get the most out of it.

 

[sjetrider]

Skat mag prop: C+75 (144mm) pitched to 12/15 by Impros. But I still need to bore my nozzle to get the most out of it.

I am not sold on the bored nosel, I tried it and ran out of torque / thrust too quick. I offed it after trying on my boat and Dylans. Thanks for the info, the pitch will probably be different down here for Toby though.

 

[sjetrider]

Im running a 16-20
but i have alot of hp in this engine
so i am not sure what you would need
My ski will rip off the bottom

I am running a 16/21 in my mag pump and it hits nice, gonna try a 14/19 if I can find one.
We have a 15/20 pitched down to 15/19 skat swirl (big hub) we are going to try w/ the TBM on Toby's 5mm stroke ADA set up, will keep you posted on outcome.

 

[crammit442]

I am running a 16/21 in my mag pump and it hits nice, gonna try a 14/19 if I can find one.
We have a 15/20 pitched down to 15/19 skat swirl (big hub) we are going to try w/ the TBM on Toby's 5mm stroke ADA set up, will keep you posted on outcome.

The prop I had in my boat that you rode at Lanier was a 14/23 w/stock nozzle and med cone. Bored nozzle to 83 and still runs out good. I also got a 13/21 and it comes on even sooner and still runs out good also. Hits a good bit harder than it did at Lanier. Using an 83mm nozzle with it also. No slippage that I can feel. Still using the med skat cone.

Charles

 

[sjetrider]

Charles (crammit442) and I had a pump swap day where we played with various versions of the 140 mag pumps and Skat props. By far the hardest hitting setup was a 13/21 Skat swirl in a 12 vane setback. However, it was only a little better than the 14/21 (in my opinion it wasn't worth the loss in top speed for the minimal gain over the 14). I had been running a 15/23 in my 14 vane setback and changing to the 14/21 was a night and day difference. Although the 14/21 was in a 12 vane (we didn't swap props into the different pumps) I don't think there is a big difference between 12 and 14 vane pumps.

Wax, I am surprised that you are running a 16/20. Have you tried a 14 or 15 primary? Are you doing this in a race boat? Our boats weren't too shabby in the power department either and the 13 and 14's really made a difference on arm-pulling power to the water. The 15 and 16's really drag it down relatively speaking.

:biggthumpup: I need a 140 mag prop 14/19 - 13/21 - 14/21 I need to try some of these. Do you have any of these laying arround Charles? If so, if I pay frt round trip can I borrow them for a week or so? Just want to make sure I am using best set up. I am like I said using a 16/21 currently.

 

[sjetrider]

The prop I had in my boat that you rode at Lanier was a 14/23 w/stock nozzle and med cone. Bored nozzle to 83 and still runs out good. I also got a 13/21 and it comes on even sooner and still runs out good also. Hits a good bit harder than it did at Lanier. Using an 83mm nozzle with it also. No slippage that I can feel. Still using the med skat cone.

Charles

My cone looks huge, not sure wich one it is though? I loved the way yours hit in Lanier, but U got total loss so not sure my set up would be same. Did you ride mine in Lanier?

 

[geraban19]

Hmmmmmm, wonder why not many freestylers use them now!!!!!!!!!!!!!

If you got the power to overcome the weight, then it ok... (Malone, Lenzi, and others of that calibre).

TBM is pretty light.

That's it.

Lenzi are always looking to save weight and increase weight to power ratio but he never think about to use OEM pump.

I think that if he knows there's something like TBM cone and mag prop use option, he might think about that.

Ive been running mag's for about 2 years only. I got some used/new cond props but never played with that since the magnum gives U an awesome handle that U become a little lazy to change props.

On our stock stroke Lameys PV and NPV, the 13/18 140mm has been doing a great job. I got some very long 16/23 (I guess) and it is awesome on a 6 mm oem cylinder for racing. (I wanna try something shorter)... I got a prop from Nikad last year and I wanna try it. The pitch is 14/21.

So... the Mag pump in my opinion are like big carbs (Novi, FS and Powerbombs)... even if it is wrong setup it is awesome and better than oem or cheaper carbs perfect adjusted.

Just half a cent

Gera

 

[sjetrider]

That's it.

Lenzi are always looking to save weight and increase weight to power ratio but he never think about to use OEM pump.

I think that if he knows there's something like TBM cone and mag prop use option, he might think about that.

Ive been running mag's for about 2 years only. I got some used/new cond props but never played with that since the magnum gives U an awesome handle that U become a little lazy to change props.

On our stock stroke Lameys PV and NPV, the 13/18 140mm has been doing a great job. I got some very long 16/23 (I guess) and it is awesome on a 6 mm oem cylinder for racing. (I wanna try something shorter)... I got a prop from Nikad last year and I wanna try it. The pitch is 14/21.

So... the Mag pump in my opinion are like big carbs (Novi, FS and Powerbombs)... even if it is wrong setup it is awesome and better than oem or cheaper carbs perfect adjusted.

Just half a cent

Gera

HMMMM 14/21 from Nikad missed that one. Sounds like the 13/18 or 14/19 or 14/21 may be what to try. Like you said the Mag hooks so good we fail to try and get more. I gotta do this, but cant afford to buy 3 new props just to see if THEY ARE BETTER.

 

[sjetrider]

A good man in FL has hooked me up w/ a 144 mag and a couple good props to start with. Looks like my overwieght mag pump issues are solved. Will keep you posted on the difference once I get it bolted up and water tested.

 

[Big Kahuna]

Same guy that use to race a Squarenose!

 

[sjetrider]

Same guy that use to race a Squarenose!

Nope, this guy is a BLASTER RACER named LEE,

 

[Big Kahuna]

godocgo!!!!!!

 

[sjetrider]

godocgo!!!!!!

dats right

 

[D-Roc]

so after reading this post i take it that solas does not make a "bigger hub" style prop like skat-trak does but the solas still will work with the tbm super pump cone. also the c-75 skat swirl prop has a bigger hub size that will match up to the increased pump hub size that the tbm offers. that is why skat is being recommended for best results with tbm cone, but not absolute necessary. Stock pump size is 144 and mag pumps are 140 and or 144. The 140 magnum is a race pump and weighs much more then the 144 magnum or stock pump. i also heard or read that 1% pump efficeincy increase is equal to 10% hp increase. Do i have all this right? (besides spelling) If so it looks like this tbm pump cone is a good mod to consider.

 

[2nd nature]

My cone looks huge, not sure wich one it is though? I loved the way yours hit in Lanier, but U got total loss so not sure my set up would be same. Did you ride mine in Lanier?

i rode yours not this time but i think it was spring lanier.your bigbore rips :biggthumpup:

 

[Mile9c1]

so after reading this post i take it that solas does not make a "bigger hub" style prop like skat-trak does but the solas still will work with the tbm super pump cone. also the c-75 skat swirl prop has a bigger hub size that will match up to the increased pump hub size that the tbm offers. that is why skat is being recommended for best results with tbm cone, but not absolute necessary. Stock pump size is 144 and mag pumps are 140 and or 144. The 140 magnum is a race pump and weighs much more then the 144 magnum or stock pump. i also heard or read that 1% pump efficeincy increase is equal to 10% hp increase. Do i have all this right? (besides spelling) If so it looks like this tbm pump cone is a good mod to consider.

Solas does in fact make a large hub "c75" impeller, but only in 140mm that I know of (I have one). Mag pumps come in any size you want, and they are all "race" pumps. The 140mm unit weighs about 8 pounds more than OEM. IMO, you'll never feel the difference in weight. I tried a 144 Mag this year and I just sold it, I like my 140 better. I'm guessing my ski had around 110hp.

 

[D-Roc]

110 hp is easily acheived with porting/compression and a pipe wouldn't you guys think, with a tbm pump cone/ prop that power should work better without the extra 8 pounds that the mag pumps add. we ride almost exclusively flat water here so we don't need any weight gains and don't run lenzi or malone hp either. I'm thinking the tbm pump cone is the way to go for us guys with midrange hp. Who here has one and tried it.

 

[Mile9c1]

I think you'd need a big bore to get 110hp. I'm running an 800cc stroker engine on pump gas. Really I have no idea how much hp it is, but I felt I got the most air off waves with the 140mm unit (which is how I judge "fun"). I've never tried a TBM unit. They probably work similarly on glass, acceleration wise, but having 12 vanes is what really allows the Mag's hook up in all conditions. 12 vanes is probably not as beneficial for flatwater, but they hookup instantly when you land from out of the water.

 

[sjetrider]

Toby has the TBM in his 5mil 82.5mm domed, 225 comp. ADA set up w/ 13/16 c/b solas and it hooks niceley. He still could use more hook up w/ his HP IMO so he will be trying my new 144 c75 13/18 to see if it helps and how close it is to the mag at that point. I personaly feel there is no equal avail to a mag (even a 140 mag) so the lighter 144 should be the shiot.
I have also ridden a ported 701cc w/ r&D dry pipe and stock 38mm carbs that had a TBM w/ a solas "J" prop that hooked up awesome, so the myth of huge HP needed for the TBM cone is just a mythe IMO.

 

[waterfreak]

the 140mm mag pump is the ********z!! (Thank's Miles!) I'm running a 16/21 prop with a 87mm bored nozzle and it rips hard (of course with the help of a 6mm lamey)
love it!