Surfriding 771 with a 155 OEM and ?? prop? surf ski?
- Thread starter MADMAT
- Start date
schicks
Karma Enforcer
- Location
- West Michigan
im running a skat big hub 7/15 that has been cut back. Running that with a JM big bore with all the goodies, stock 155 pump. Its in my Blair hull, and all i do is ride surf on the ski, but it seems like a good prop. I would like to get it to rev out a little more/faster but i am happy with it enough until i need to pull the pump. That would be reducing pitch correct?...bending the trailing blades up a bit? or boring the nozzle a bit i think would help. But its real close.
- Location
- Valley Springs, CA
I have a skat 7/12 I came across on eBay brand new. I checked skats chart as I was in the fence about the combination also. I will be trying it behind a 701 with bolt-ons
Sent from my iPhone using Tapatalk
Sent from my iPhone using Tapatalk
- Location
- michigan
oem 155 701 at 84mm b pipe. think i got a 6/12. it works. thrust reduction and nozzle is bored also
- Location
- michigan
i went from 876 4 mil, w 144, to 701 84mm bore w oem 155. comparable results imo. i would never run a smaller pump again. period.
Christian_83
Xscream
- Location
- Denmark
Thats whats I've been saying for a long time now, much more punch and grip in the water
cookn
Kamikaze
- Location
- where you live
cats outta the bag, all the cheap oem 155 pumps will be gone now
- Location
- Medford Oregon
I'm running a hand ported 718 (82mm) 62t with a single mikuni 46. Oem 155 with skat 6/12, reduction nozzle bored to 90mm. I ride all surf and it plenty for me but I'd like a little more bottom end so I'm going to go twin carb and bigger pipe soon and should be perfect. It is very critical that your motor is dialed: high compression, lightened flywheel, MSD, etc.
Sent from my iPhone using Tapatalk
- Location
- Medford Oregon
I am also only running a protec pipe which is for high end but I made it work. I have my motor so dialed in and I can't get any more bottom end but I will be going lay down pipe, twin 46's and probably going to get a new cylinder and go 760 or bigger. I'd like to get up an 850 and then it'll really turn the 6/12 on the bottom end
Sent from my iPhone using Tapatalk
- Location
- Medford Oregon
There's magnetic templates you can get and you can do the porting yourself. It woke up my engine quite a bit on the bottom end. So definitely port it and run 180+ psi
Sent from my iPhone using Tapatalk
What hull are you riding @Forrest McLauchlin ?
cookn
Kamikaze
- Location
- where you live
you really just need to open up the pump shoe and intake on any hull so you can feed the big pump
I have been looking at it and it is already pretty big on my WDK Envy....but I will do whatever it takes!
I love this hull so much and can't really seeing buying another hull until it is dead which may be never...and I like glass work...