OEM 155 Pump Talk

[Freakrider]

Stock trim ring with oem flow guard attached with a SS homemade bracket.

 

[txsuperjetfreak96]

Nice what I'm gonna use

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[Freakrider]

Oem gives enough trim, if you have too much trim you lose too much thrust/height imo.

 

[txsuperjetfreak96]

Right what I've always heard

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[Freakrider]

I've got up to 90.5mm max bore on a stock nozzle. Im also considering trying to reinforce the nozzle with glass and carbon and then boring it bigger to see if a larger nozzle combo works better...ex 12/18 prop with 89mm nozzle vs 13/19 prop with 93mm nozzle. I'm curious if anybody has done any testing like this and what their results were

Did you have any issues with stock nozzle being bored to 91.5 ? I have mine at 90.35.

 

[-BenZi-]

Hey Freestylers, I have bought a Obsession Freestyle hull for flatwater. The hull is ready for a 155 oem pump. I will use a ported 850cc big bore engine (no PV), 44 carbs, and Im not sure maybe PFP or B pipe. Is this engine big enough for that big pump or is it better to use a 144?

If the engine is big enough, which pitch do you would use and which nozzle and bore?

 

[stefan]

You suede start with a 7/13 impeller 90 mm exit nozzel, that Will bee pretty close i run a 155 mag 8-15 and its a bit over propede. My setup is 865 8 mm Dan lamey no pv MSD TL PFP 48 dual riva power bombs

 

[IS0LD0UT]

I checked with TBM they don't make a 155mm super pump cone. I think someone had said they modified a 144. What is involved with that?

 

[jonolove]

I checked with TBM they don't make a 155mm super pump cone. I think someone had said they modified a 144. What is involved with that?

A little grinding

 

[Jetrider]

Has anyone tried it with and without TBM cone, without changing anything else?

 

[IS0LD0UT]

Has anyone tried it with and without TBM cone, without changing anything else?

I plan to

 

[Jetrider]

News?

 

[MADMAT]

Ahg 13 pages I have some reading to do!

 

[MADMAT]

http://www.yamahapart.com/oemparts/a/yam/5003a403f870021f60a12d2c/jet-unit-1

Thanks!

 

[alex_hockey]

http://www.yamahapart.com/oemparts/a/yam/5003a403f870021f60a12d2c/jet-unit-1

Thanks!

An even better option

http://www.yamahapart.com/oemparts/a/yam/54206cf3f87002132cdd71ee/jet-unit-1

 

[MADMAT]

More vanes?

 

[MADMAT]

An even better option

http://www.yamahapart.com/oemparts/a/yam/54206cf3f87002132cdd71ee/jet-unit-1

That looks a lot different than the 96 B2 set up without trim or the 97 B2 set up with trim.....

 

[scotts2t]

B2 stator section only measures 153mm ID. 96 wave raider 1100 measures 157mm ID. We use WR setups.

 

[alex_hockey]

That looks a lot different than the 96 B2 set up without trim or the 97 B2 set up with trim.....

8 vein big hub, weld the 4 long bolt holes closed and re drill appropriately. Go to town with a aluminum flapper on the stator section and you now have a 155 8 vein mag. That fits a old style 155 reduction and wear ring. Different bearings It runs 3 front seals stock I lathed it down to run 1 and also get the clearance for the impellors. I blue printed mine.

 

[MADMAT]

^^ and all aluminum!!