the best magnum pump

[top-freestyle]

Hi guys what is the best magnum pump for the freestyle superjet 10mm stroker?
And what is pitch of impeller?


:brap:

 

[SUPERTUNE]

Here's my response to another 10mm stroker engine question. Your engine builder should know what works for his engine package.

http://www.x-h2o.com/threads/58931

The porting, compression ratio, pipe setup, carbs brand, size and jetting, what ignition are you running MSD Enhancer or MSD Total Loss, and how much initial timing, and how your setting up the ski for flatwater or surf riding all play a BIG role as to what pump size and impeller pitch that's matched to the engine power and torque curve.
We run many different combination's to achieve the results we want for the application.

 

[top-freestyle]

DASA built cylinder power valve , 48 novi carbs , total loss , dry pipe

 

[ATS_Aaron]

The porting, compression ratio, pipe setup, carbs brand, size and jetting, what ignition are you running MSD Enhancer or MSD Total Loss, and how much initial timing, and how your setting up the ski for flatwater or surf riding all play a BIG role

Do you know the rest of the stuff Chucky asked for?

I am running a stock pump with (I think) a Hooker 14/18 impeller.

Aaron

 

[SUPERTUNE]

144mm up to 146mm pump size depending on how much HP your making off the bottom, more aggressive the porting=less bottom end=smaller pump to get spinning faster into the upper rpm where the porting works.

 

[top-freestyle]

one of my friend using 148mm 13/19 impeller on same engine which i have it but the exhusat B pipe he use.

 

[HBCwatercraft]

U can have this custom made. 12v 145mm setback oil filled
milled paper thin.

 

[CARBONX2]

Is it also 145mm across the vanes or only where the impeller sits?
I have taken a 144mm magnum out to 146mm where the impeller sits but not at the vanes yet

U can have this custom made. 12v 145mm setback oil filled
milled paper thin.

 

[HBCwatercraft]

Its 145mm if u measure the back side so were the prop sits.

 

[HBCwatercraft]

I havnt measured the front, but ill do that tonight.

 

[yamaboy2000]

if were talking about yamaha based pumps, i'm gonna have to say with a 10mil stroke a 148 mag with a 9/14 or 10/15 swirl prop.

 

[jmeadlock]

I'm planning a high hp Superjet for bouys; haven't decided on pump.

Basically stock 951, want speed more than grunt.

I'm leaning towards a 144 mag.

I assume a 148 isn't any better after 20mph.

But I'd bet a 148 would be the for low end grunt