155mm pump in SJ

CarterB

CarterB

X
Location
orlando
I recently got a Waveblaster 2, for the 760 motor, and happen to notice that the 155 mm pump has the same bolt pattern as the 144 in the superjet. the shaft is .5" longer but could be swapped or shortened w/ ease. Does anyone do this or know if there is any advantage to this.

(I know i would need to do something with the pump shoe too, but the little technicalities are not what I am interested in hearing about.)
 
N

njfl

X-H2
I have not personally run a 155mm pump, but from my understanding of pump theory and from seeing a few friends who have been running large pumps, unless you are running a big hp and torque producing motor, you will actually be mismatched. You will have a very inefficient combination.

This is why the 140mm Mag pump has proven to be so good for Superjets and Blasters. It is a relatively small diameter (easy to get turning) and it is very efficient flowing (moreso than the 144 OEM pump).
 
N

njfl

X-H2
MADMAT said:
I always wondered what a 155 with WDK 1200 would feel like:notworthy:
Click to expand...

Certainly the 155mm pumps can give the volume and produce high speeds with big motors, but considering that we are mostly all striving for torque and instantaneous response, I think a 148mm Skat Mag would be a better fit for the WDK1200. At least I would try that first.

I'd be curious to know if Jeff (or anyone else) is running 155mm pumps in the WDK 1200. Has he tried the 148mm?

Back in the 80's, car mfgs were making turbo impellers larger and larger, then they went to twin smaller turbos, which would spool up faster. Same concept here.
 
SUPERTUNE

SUPERTUNE

Race Gas Rules
Location
Clearwater Fl.
No way would I think that in any standup ski would be able to use a 155mm pump.
Even with the Big HP I'm getting out of our X-Scream 1000's the 155's are not a good match.
 
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