Help get my PHP 1015 dialed in

[Jcary85]

Hey there,
So i just finished bolting my ski back together with a PHP 1015 and 155 pump. I took it out for its first ride yesterday. Did the normal carb screw tuning and the fueling seems "ok" and the plugs look good, but its got no bottom end. the 781 that was in it before pulled way harder. The motor definitely makes power. If i whip the back end around then get on it its got good power if it can get the revs up before the pump really hooks up, but it has no power just trying to blip the throttle, then full throttle off a wake like you'd do when jumping/flipping etc. It's really hard to tell if, when it does feel good, it is because there is no load on the pump and it can rev, or because the waterbox clears out or something.

I'm not sure what to try next and before I go harass Zack from PHP again (he's been EXTREMMMMMELY helpful BTW - bought this motor used and he's still very willing to help), I'd like to see what I can get worked out on my own (or with the help of the X).

Here are the details:
1 year old PHP 1015. Setup for pump gas. Measured 175-180psi (can't recall exact number)
PHP intake, vforce3 reeds, novi 48s
PFP pipe run dry. Port matched manifold to engine
Zelltronic ignition, wax curve, lightened charging flywheel (have a TL flywheel also, but have not tried it yet)

Carb setup:
21PSI pop off, 2.5 NS, 115g spring
135 pilot, 125 main (per recommendation)
Screws: Low: 3/4, High: 1-3/4

Pump:
Stock 155 pump
Thrust trim
Bored exit nozzle 89mm
Delran wear ring (brand new)
Stock cone (slight delay in my stubby cone order. stubby will be in this week)
Skat Impeller. Impeller says 11/16 on it but friend measure it at 13/16. I need to take it out and check it myself

What I've Tried:

• Temp strips never registered anything on waterbox, so I tried drying it out. That seemed to help a bit. I still can't get it to register anything on the temp strip. Recommendation is to run the box at 150 degrees.
• General carb screw tuning. I tried leaning both low and high end way out, that only caused hesitation issues. Richening beyond where it's at didn't do a whole lot.
• Verified Zeeltronic is using the Wax curve and not the lower power curve

Next Things I might try:

• Remove impeller, check pitch, re-pitch to 11/16 if its actually 13/16
• Switch to 2.3NS and bring pop-off up a bit

Honestly, I'm kinda at a loss on what to do next. open to ideas. thanks!!

-Jordan

 

[Big Kahuna]

Contact Zack at PHP.............

 

[Jcary85]

Contact Zack at PHP.............

I will. I’m just trying to make sure I try everything I can before bugging him. He’s been very helpful but I don’t like wasting people’s time. Plus I think there’s value in discussing publicly to help others with similar issues in the future.

 

[Harbor]

I guess every set up is different, and you have a stock pump. But Your prop pitch seems really really tall...

Have you gotten a recommendation from Zack for your set up regarding your timing curve, pump and prop pitch ?

 

[Jcary85]

I guess every set up is different, and you have a stock pump. But Your prop pitch seems really really tall...

Have you gotten a recommendation from Zack for your set up regarding your timing curve, pump and prop pitch ?

Yes, wax curve, pump setup is good and 11/16 were the recommendation. If the prop actually measures to 13/16, is it safe to repitch it or is a new prop in order?

I’ve been pondering this all day and I’ve convinced myself this has to be a prop/pump issue and the motor just isn’t able to hit the power band. At least that’s my current theory lol

 

[Harbor]

Like I said every set up is different and you have a stock pump. I have a mag on 9/15 set back 5 being pushed by a 1200 ?

I think impros re pitches fir $70

 

[Storbeck]

For what it's worth for my 898 on pump gas he told me skat 7/14 or 15 and that those usually measure actually about 9-9.5/14-15 on a pitch gauge. I would expect the 1015 would want something a little steeper but all signs point to you needing a little lower pitch. It was a long time ago when I talked to him but I recall something about OEM pumps need a little lower pitch than mag pumps (I told him I was using OEM so that was what the recommendation is for). Also I've heard that different hulls with different pump tunnels will need different impellers so it's all just a starting point. Also this was based on running pfp wet so you probably need to rev with the dry pipe.

 

[Jcary85]

Well I measured the prop at 13/16!!! Way too tall. Repitched it to 11/16 and threw a stubby cone In. Hopefully i repitched it correctly. I only half know what I’m doing with that ‍♂️ Testing tomorrow and will report back!!! Thanks for the advice so far!

 

[powerhouseperformance]

Sounds like you're on the right path. Too big of a prop and no rpm can kill the performance faster than anything...as well as make jetting and pipe temp setup next to impossible. Remember it is infinitely easier to tune and up pitch a boat with a low prop vs being to tall and working backwards. We've also encountered many a prop here that who knows what they started at, someone tweaked up, and remarked.

Remember as you take a low prop higher the tolerance to the wear ring decreases . If it no longer fits in the wear ring no prob - clearance and refit. When you try and depitch a prop you increase the clearance and chances are you have a pretty crappy performing prop. You can only take them a small amount lower

 

[Jcary85]

Sounds like you're on the right path. Too big of a prop and no rpm can kill the performance faster than anything...as well as make jetting and pipe temp setup next to impossible. Remember it is infinitely easier to tune and up pitch a boat with a low prop vs being to tall and working backwards. We've also encountered many a prop here that who knows what they started at, someone tweaked up, and remarked.

Remember as you take a low prop higher the tolerance to the wear ring decreases . If it no longer fits in the wear ring no prob - clearance and refit. When you try and depitch a prop you increase the clearance and chances are you have a pretty crappy performing prop. You can only take them a small amount lower

Thanks so much!!! If this makes a good improvement I’ll prob order up a new impeller that’s a bit lower to start with. At least I then always have a spare!

 

[clouse22]

I would pressure test your exhaust chamber...you could have a crack in the inner chamber of the pfp which could lead to your low waterbox temps bc of the excess water in the system. A broken exhaust can make the ski feel rich one min and lean the next.

Just a guess here, but if the prop was too tall, your exhaust would be hotter based on the motor working harder to spin the prop.

 

[Jcary85]

For anyone following along, I took the ski out last night and it was definitely a bit better with the prop change. I changed to 2.3NS and fattened up the bottom screw a good bit. Ran a bit better with that change as well. Still not performing like it should.

I just pressure checked the exhaust and it is not leaking. Held 10psi for a while without any issues.

Per PHP recommendation, I'm ordering an 8/16 prop. I think that will really help!! Hopefully I can get one quick

 

[mickolobe]

I have a PHP898 and a 148 Torrent setback pump with a 10/16 cut -2 if I remember correctly with a PFP pipe in my SF.

How do you like the Zelltronic ignition with the wax curve and lightened charging flywheel? I'm about to order one from Zach.

 

[Jcary85]

I have a PHP898 and a 148 Torrent setback pump with a 10/16 cut -2 if I remember correctly with a PFP pipe in my SF.

How do you like the Zelltronic ignition with the wax curve and lightened charging flywheel? I'm about to order one from Zach.

Love it so far! Fits in the stock ebox, seems to run well. I’m trying out the total loss flywheel this weekend. Great to be able to switch so easily. Just wish I had an oringed front cover. I can’t seem to find any billet/etc front covers that are for the gp760.

 

[DylanS]

W

Hey there,
So i just finished bolting my ski back together with a PHP 1015 and 155 pump. I took it out for its first ride yesterday. Did the normal carb screw tuning and the fueling seems "ok" and the plugs look good, but its got no bottom end. the 781 that was in it before pulled way harder. The motor definitely makes power. If i whip the back end around then get on it its got good power if it can get the revs up before the pump really hooks up, but it has no power just trying to blip the throttle, then full throttle off a wake like you'd do when jumping/flipping etc. It's really hard to tell if, when it does feel good, it is because there is no load on the pump and it can rev, or because the waterbox clears out or something.

I'm not sure what to try next and before I go harass Zack from PHP again (he's been EXTREMMMMMELY helpful BTW - bought this motor used and he's still very willing to help), I'd like to see what I can get worked out on my own (or with the help of the X).

Here are the details:
1 year old PHP 1015. Setup for pump gas. Measured 175-180psi (can't recall exact number)
PHP intake, vforce3 reeds, novi 48s
PFP pipe run dry. Port matched manifold to engine
Zelltronic ignition, wax curve, lightened charging flywheel (have a TL flywheel also, but have not tried it yet)

Carb setup:
21PSI pop off, 2.5 NS, 115g spring
135 pilot, 125 main (per recommendation)
Screws: Low: 3/4, High: 1-3/4

Pump:
Stock 155 pump
Thrust trim
Bored exit nozzle 89mm
Delran wear ring (brand new)
Stock cone (slight delay in my stubby cone order. stubby will be in this week)
Skat Impeller. Impeller says 11/16 on it but friend measure it at 13/16. I need to take it out and check it myself

What I've Tried:

• Temp strips never registered anything on waterbox, so I tried drying it out. That seemed to help a bit. I still can't get it to register anything on the temp strip. Recommendation is to run the box at 150 degrees.
• General carb screw tuning. I tried leaning both low and high end way out, that only caused hesitation issues. Richening beyond where it's at didn't do a whole lot.
• Verified Zeeltronic is using the Wax curve and not the lower power curve

Next Things I might try:

• Remove impeller, check pitch, re-pitch to 11/16 if its actually 13/16
• Switch to 2.3NS and bring pop-off up a bit

Honestly, I'm kinda at a loss on what to do next. open to ideas. thanks!!

-Jordan

as recommended to look at this by someone on my prop thread

I have a 1100 WDK stroker with a TL that makes incredible power

I have a 8/15 thinblade 5mm cut back prop in currently with a 155 pump
I’m making decent low end too but not nearly as much as I was with a 148 mag pump
I think I need to bump up in pitch size and I think you may need to lower your pitch size with that 155 pump
I was running around the same size prop as you currently are with a 148 pump and the same motor
I’m interested to see what you figure out!