148mm pump in an SJ

[sjetrider]

Does anyone run a 148mm pump in a superjet? I am going to attempt to run a Solas gold 148mm pump w/ a Skat-Track mag prop. Does anyone have a simular set up ? Trying to figure out what pitch prop to use? Any info would be helpfull.

 

[Matt_E]

I think that's a pretty big pump for a 701 platform motor.

 

[sjetrider]

144 TO 148? Not just any 701 platform though, 5mm stroke,82mm flattop, T/L.
I went from 140 to 144 mag with no drawbacks, I think this can be done with propper propping. If anyone has tried and knows differently or has succeeded, I really want to know before I go any further (buying custom prop) with this project.

Thanks
Brian

 

[RiverRat]

Superramjet is running a 148mm mag in his 66E REV hull.

 

[superramjet]

Superramjet is running a 148mm mag in his 66E REV hull.

I'm selling my 148mm mag out of my rev.


148 skat-trak mag pump:

This setup will fit in superjets, xjets and rev hulls

12 vein non set-back
14/19 swirl
skat reduction nozzle with 6 interchangable rings
tilt nozzle and protec lever
custom titanium shaft (sj shaft won't work with the big pumps)
waterdawg pump shoe for 144 or 155 pumps
modified worx intake grate
dual cooling fittings
modified bolts (gp1200 pumps hold the pump together by attaching to the pump shoe, this is setup is like the superjet pumps).
waveblaster 2 rubber seal. (gp1200 pumps dont use this seal)
bolts in to the oem superjet pump inserts
Very nice condition ready to bolt in $1600 plus shipping

 

[sjetrider]

I'm selling my 148mm mag out of my rev.


148 skat-trak mag pump:

This setup will fit in superjets, xjets and rev hulls

12 vein non set-back
14/19 swirl
skat reduction nozzle with 6 interchangable rings
tilt nozzle and protec lever
custom titanium shaft (sj shaft won't work with the big pumps)
waterdawg pump shoe for 144 or 155 pumps
modified worx intake grate
dual cooling fittings
modified bolts (gp1200 pumps hold the pump together by attaching to the pump shoe, this is setup is like the superjet pumps).
waveblaster 2 rubber seal. (gp1200 pumps dont use this seal)
bolts in to the oem superjet pump inserts
Very nice condition ready to bolt in $1600 plus shipping

Why you selling it? Did it hook up ok w/ the 66E? Too much pump? How was that prop on bottom end?

 

[superramjet]

it hooked up very well with my setup, i tried many different combos. This was the best one i came up with for my big motor. I'm selling because I don't like the weight of it and how it makes my light hull handle. It wasn't that noticable in my other heavier hull but it makes my very light hull feel different.

 

[gorilla]

cross222 had a 148mm pump in the green sn i got from him.

give him a p/m and he could give you some wisdom.

good luck

gorilla

 

[skinnyman]

I bought that pump set up from him been running now for 2 yrs great pump set up for big motor

I have a couple of props if anyone needs them.

 

[Cross]

I had good luck with that pump in my mild ss. It is a 6 vein skat set up. Skinnyman could give you an idea of what props to run. I had the best luck with the lowest pitch I had of the bunch. I think it was 9-17. It had great bottom end, but did lose about 1.5 mph on top compared to a 144. I gained some of that speed back by using a pump stuffer.
I wish I never sold that pump, I would love to put that in my sj project.

Brian

 

[yamaslut]

it hooked up very well with my setup, i tried many different combos. This was the best one i came up with for my big motor. I'm selling because I don't like the weight of it and how it makes my light hull handle. It wasn't that noticable in my other heavier hull but it makes my very light hull feel different.

You must be on to the Mag prop mod????

I heard it hooks just as hard as a Mag pump w/o the weight:sneaky: :sneaky: :sneaky: :sneaky:

 

[njfl]

I have a few comments/questions as I really don't think many people are at a power level to efficiently use a 148mm pump in a SJ (but I may be mistaking).

The point of running a bigger pump is to flow more volume. Is the intake tunnel of a SJ suitable for larger than 144mm pumps or would it have to be modified?

Most of the people on here today with decent sized motors are running 140mm pumps very successfully. Why would one jump from a 140 Magnum to a 148 Magnum, skipping the 144 Magnum?

Cross, by putting in a pump stuffer, you would just be negating the effects of the larger pump, wouldn't you? I would think that a 148mm with a pump stuffer would perform similar to a 140 or 144.

Observation: It would seem to me that it would be best to run the smallest diameter prop you can without cavitating/slipping. That way you have less rotating mass and can spool up faster (better bottom end).

 

[Mile9c1]

Is the Solas 148mm different than the Skat 148mm?

I don't think you'll gain anything over a 144 Mag, except lower top speed.

 

[RiverRat]

I have a few comments/questions as I really don't think many people are at a power level to efficiently use a 148mm pump in a SJ (but I may be mistaking).

The point of running a bigger pump is to flow more volume. Is the intake tunnel of a SJ suitable for larger than 144mm pumps or would it have to be modified?

Most of the people on here today with decent sized motors are running 140mm pumps very successfully. Why would one jump from a 140 Magnum to a 148 Magnum, skipping the 144 Magnum?

Cross, by putting in a pump stuffer, you would just be negating the effects of the larger pump, wouldn't you? I would think that a 148mm with a pump stuffer would perform similar to a 140 or 144.

Observation: It would seem to me that it would be best to run the smallest diameter prop you can without cavitating/slipping. That way you have less rotating mass and can spool up faster (better bottom end).

Malone 1000cc boat only uses a 145mm set back kawi pump w/ a longer SXR style intake grate. I think anyone who has been on that boat will agree that it is the SH**!!!! I know the REV1200 has to run a 155mm mag b/c it has hook up issues w/ other pumps.........or so I have heard.

 

[sjetrider]

I have a few comments/questions as I really don't think many people are at a power level to efficiently use a 148mm pump in a SJ (but I may be mistaking).
The point of running a bigger pump is to flow more volume. Is the intake tunnel of a SJ suitable for larger than 144mm pumps or would it have to be modified?

Most of the people on here today with decent sized motors are running 140mm pumps very successfully. Why would one jump from a 140 Magnum to a 148 Magnum, skipping the 144 Magnum?

Cross, by putting in a pump stuffer, you would just be negating the effects of the larger pump, wouldn't you? I would think that a 148mm with a pump stuffer would perform similar to a 140 or 144.

Observation: It would seem to me that it would be best to run the smallest diameter prop you can without cavitating/slipping. That way you have less rotating mass and can spool up faster (better bottom end).

This is incorrect. I have a 144 mag pump that has a 75mm center vien hub, stock is 144mm w/ like a 53mm vien hum. The Mag 144 SPANKS the stock 144pump regardles of what prop you use in the stock pump. If a larger diamitor hub is bad then why is TBM selling hunfreds of pump cones (stuffers), I have 3 friends that have the TBM's in there pump and they hit nice compared to stock.

IMO, you are mistaken here as a stock 701 will turn a 144mm pump so why wouldnt a 5mm stroker, flattop w/ 220 comp. and total loss turn a 148mm pump?

Thanks for the input , this is what I am after. Something to force me to see all sides.

 

[sjetrider]

Is the Solas 148mm different than the Skat 148mm?

I don't think you'll gain anything over a 144 Mag, except lower top speed.

The skat 148 mag has larger hub and more viens then the Solas gold.

I am not trading the 144 mag out for the 148 Solas. I am using the 148mm on another build.

I agree that the 144 mag is the best, but I want to try something new on this build. :woot:

 

[sjetrider]

I had good luck with that pump in my mild ss. It is a 6 vein skat set up. Skinnyman could give you an idea of what props to run. I had the best luck with the lowest pitch I had of the bunch. I think it was 9-17. It had great bottom end, but did lose about 1.5 mph on top compared to a 144. I gained some of that speed back by using a pump stuffer.
I wish I never sold that pump, I would love to put that in my sj project.

Brian

Cross and skinnyman, thanks for the input. This really helps. I will PM both of you for more info. I would like to call one or both of you if poss.
Thanks again:biggthumpup: :Banane09:

 

[superramjet]

if prop'd correctly your ski would turn a 148 you would have very strong, "torquey" pull. My motor had so much torque a tall 144 mag pump wouldn't hook up with the tallest prop i tried. I didn't want to spend money in having them make custom props, so I upgraded the pump to run readily available props. The 148 pulled much harder, the downfall is the extra weight.

 

[sjetrider]

if prop'd correctly your ski would turn a 148 you would have very strong, "torquey" pull. My motor had so much torque a tall 144 mag pump wouldn't hook up with the tallest prop i tried. I didn't want to spend money in having them make custom props, so I upgraded the pump to run readily available props. The 148 pulled much harder, the downfall is the extra weight.

I am not sure yet what this pump wieghs yet. I added pics. it does not look like it will be much heavier then the stocker and should not be as heavy as my 144 mag. I can see where a 148 skat mag would be very heavy though.

Again, please keep sending comments and feedback as this is new to me and I need all the input I can get.

Thanks ramjet

 

[njfl]

Again, please keep sending comments and feedback as this is new to me and I need all the input I can get.

Thanks ramjet

I think you are exploring relatively new territory here and if you choose to proceed and get good results with a moderately worked 701-based motor, you will be the innovator of this territory. Any feedback here is mere speculation, except from skinnyman and the two guys who HAD (note "had", i.e. past tense) 148mm pumps and for some reason, ditched them (no derogatory tone implied here, just stating facts).

There are so many variables to play with (intake duct volume, prop/pitch, reduction nozzle, weight of boat/rider, standard/setback). Heck, I don't think anyone has it all figured out for the 140/144 pumps that we have been running for the past 10 years.

Mark at Full Throttle has also been experimenting with a 148mm for his setups too. You might want to contact him and get his input.

Keep us posted though. Looking forward to the results.