FX-1 Hooker on the way!!!!

[Melmack]

So did you grind a recesed area to raise the pump up some?

 

[Wave Chaser]

The front mount area had to be ground down for the stock 144 pump to sit in. I ground way down and reglassed and then brought the glass back up to where the pump would mount centered and then shim the back as needed as it had plenty of clearance due to the way the 122 pump was configured.

 

[Melmack]

Yea, I see how it steps up there. Thanks again. I think that is the best way to do it. That way, I can drop the 700 buks twards a skat pump instead of paying Bonsai Bob for his handy work on a part that will swell up and die eventualy. BTW, Is that picture looking into the cavity at the stator viens the new pump shoe? It looks very clean. Nice work! It looks like there realy is no reason to open up the cavity. Unless of you want more speed. What the heck would you want speed for on an FX-1?

 

[Wave Chaser]

That is the view before any fitting or grinding. I was surprised at how good it looks and I agree nothing to do but fit and seal the shoe in there.

If your coming to the LSFR in surfside in a few weeks I will be there and you can take a look at it.

 

[Melmack]

Thanks, I plan on beeing there for shure! just a little more tuning needed on the old SN and I'm ready for some surf fun!

 

[motobehrens]

The front mount area had to be ground down for the stock 144 pump to sit in. I ground way down and reglassed and then brought the glass back up to where the pump would mount centered and then shim the back as needed as it had plenty of clearance due to the way the 122 pump was configured.

What was the total thickness of shimming you ended up with at the rear of the pump? Just curious, so I can compare what I ended up with.

 

[Algonquin]

With the 144 shoe what is everyone doing for an intake grate? Drilling new holes in an fx1 grate?

 

[Wave Chaser]

Shimming on mine for the rear was 4 mm.

I plan on fitting the FX intake as I already have an R&D toploader it is narrower than the hole so I may just epoxy some filler between the shoe and intake.

You also have to use a Mid mount Steering Noozle not sure if any stock ones mount center but I used a Pro Tech Nozzle (The one thing I purchased) and The steering cable will be to short and someone on this site figured a good fix by purchasing a PVC connecter works to extend the insert on the hull to bring the cable closer to the steering mount. Some grinding to the bottom of pump and the ride plate wraps it up I think.

 

[Melmack]

:trink26: OK, anyone think about this: I was mocking up a 144 pump I had today. Why not move the whole shoe back the diference between the SJ shaft and the FX shaft. This just so happens to be the same distance as needed to make the SJ intake grate bolt up. This also enlargens the tiny pump cavity to about the sise of a SN superjet. The only drawback is that your pump inlet is now further back about 3 inches. I don't know what that will do to the handling. This is great because it eliminates the need for a shaft swap if you have a sj shaft. You also get to bolt up a nice SJ intake and your steer nosel gets that extra throw we all love. Plus the extra set back might help you leap out of the water just a little bit more. You have to do a little extending on all the tubes, and cut the ride plate back, but the ride plate would still bolt up just fine. I even thought about cutting out my fxr pro intake arround the shoe and just glassing that in. Of coarse, you could just foam and glass it just as easy. Why hasn't anyone elste tried this? It seems like the simplist and most efective way to do it. There has to be a good reason.

BTW, the mid mount is't nessisary. Simply invert the little male ball thingie to the other side of the arm and it works just like a mid mount nozzel.

 

[Flash-FX]

Have you ever looked at my build? Been there...wrestled with that...4+ years ago.

The F1-PRO appears to have a similar pump setback as you are trying to re-invent. The only problem I see is that there are NO detailed ride/handling reports from the F1-PRO. Is that the way to go? Good question. OK F1-PRO owners...here's your chance, post up those ride reports!! Is that the "ticket" for all out performance in the FX-1?

At first glance, hacking up a SJ/144mm pump inlet tract and grafting it into the FX seems the way to go... But first...Let's back up. Do you FX pump guys remember the "SJ pump stuffer"? (my ski has a reduced area similar to that) It was designed to add a little more top speed to the SJ. Why? It reduced the pump inlet tract volume and was supposed to add something like 1-2 mph. What they don't advertise about the "stuffer" is that it also helped from tossing you off at top speed. When you start to go that fast, the "ram" effect starts to load the inlet area with extra air/water. The second you start to relax the throttle, and the pump stops pumping, where does that "extra" pressurized inlet air/water go? It spills out from under the inlet grate area, lifting up the back of your ski....Get ready...Hang on...You're tossed. There was a similar handling issue with some racing sit-downs when they started to get into the 60+mph range. In following years the mfrs made the inlet areas smaller on those pumps to eliminate that. Why does the SXR only use only a 140mm pump and handle rock steady at 60+ mph?

If you ride in the surf only, you shouldn't notice it at all. But those high speed blasts will become interesting. BIGGER is always not better in this case.

 

[Melmack]

Yea, I remember that pump shoe. My fxr-pro has a similar stuffer built from the factory. I assume your build is on here. I'll check it out, thanks. If I go this route, I'll post yet another FX conversion for all to see.

Update: Flash, I checked out your build, nice pump btw(drooling). I did read that Incredible build. I diddn't realise you had moved the pump back a little. In my idea, I plan on moving it back quite a bit more (Ill take pics today.) Do you happen to remember the diference in length on the drive shafts. That's the key here. I don't have an FX shaft. Part of this idea is to eliminate the need for a fx shaft and all other modded parts since I bought an empty hull and doner SJ's are everywhere. Stock SJ parts are easier to find and will be made for years to come.

 

[Flash-FX]

Yea, I remember that pump shoe. My fxr-pro has a similar stuffer built from the factory. I assume your build is on here. I'll check it out, thanks. If I go this route, I'll post yet another FX conversion for all to see.

Update: Flash, I checked out your build, nice pump btw(drooling). I did read that Incredible build. I diddn't realise you had moved the pump back a little. In my idea, I plan on moving it back quite a bit more (Ill take pics today.) Do you happen to remember the diference in length on the drive shafts. That's the key here. I don't have an FX shaft. Part of this idea is to eliminate the need for a fx shaft and all other modded parts since I bought an empty hull and doner SJ's are everywhere. Stock SJ parts are easier to find and will be made for years to come.

2.100"

My motor/bulkhead is moved back a little too. The space between the factory pipe and stock gas tank is about 5/8".
Sorry for the thread jack guys.

 

[Idok]

Have you ever looked at my build? Been there...wrestled with that...4+ years ago.

The F1-PRO appears to have a similar pump setback as you are trying to re-invent. The only problem I see is that there are NO detailed ride/handling reports from the F1-PRO. Is that the way to go? Good question. OK F1-PRO owners...here's your chance, post up those ride reports!! Is that the "ticket" for all out performance in the FX-1?

At first glance, hacking up a SJ/144mm pump inlet tract and grafting it




didnt spend enough time on it at daytona.........


hopefully will get some tray time this weekend if I can find out where I left my spark! :rocketwhore::thumbsdown:



FWIW.....Jeff told me the reason for the setback pump in that boat is that it cures porpoising.....I never had problems with a stock fx porping, but I also never had one with a 144 pump either.
:fingersx:

 

[Melmack]

Good info guys. I also think the set back allows for a SJ drive shaft on the f1-pro. I guess they had the same Idea to use all the doner parts from a sj to drop into a f1-pro. Makes since. The more I look at it, the more I'm convinced it will work great. Anyone have a stock or aftermarket fx ride plate? I need that, the pump shoe and the motor mounts and I can get this thing finnished.

 

[motobehrens]

When you start to go that fast, the "ram" effect starts to load the inlet area with extra air/water. The second you start to relax the throttle, and the pump stops pumping, where does that "extra" pressurized inlet air/water go? It spills out from under the inlet grate area, lifting up the back of your ski....Get ready...Hang on...You're tossed.

Just curious what speeds you are currently dealing with that are making your FX1 handle weird? 50? 55? 60? Have you tried the pump stuffer in your setup? It would be interesting to do a side by side handling comparison between the various FX1 pump conversions. Do the 140 conversions have the same issues?

 

[Flash-FX]

Just curious what speeds you are currently dealing with that are making your FX1 handle weird? 50? 55? 60? Have you tried the pump stuffer in your setup? It would be interesting to do a side by side handling comparison between the various FX1 pump conversions. Do the 140 conversions have the same issues?

In our group of FX-1 guys, there are 3 different conversions running. Here is the high speed handling report (in reference to grates). With the Kawi mod, "frankie style" you can run any scoop grate without any handling differences at high speed.The top loader seems to a good choice here. With the Blowsion 144mm/FX-1 pump (Bonsai Bob mod) and My 144mm pump/hull conversions, things tend to get goofy with certain "loading style" grates. The Blowsion pump with a (FX-1) deep scoop starts to handle unstable approaching the top end area. A open style will add some stability when traveling at WOT. With my conversion,I can not run a top loader(SJ) grate in my ski (it will start "bumping" and try toss you off starting at about 30-35mph,"pump inlet overload"). I run a cheap $15.00 SJ Pro-Tec open grate. It seems to do fine, one added benefit of a open style grate is on beach landings,it doesn't scoop as much sand. How fast is riding fast? I don't have any specific #'s but my boat can inch away from a GP800 with a 150lb skinny kid on it (plenty fast enough).
Summing it up...If you ride surf only, and never want to ride fast, you can get away with any style grate...on any of the 140-144mm conversions.

Have you ever looked at my build? Been there...wrestled with that...4+ years ago.
The F1-PRO appears to have a similar pump setback as you are trying to re-invent. The only problem I see is that there are NO detailed ride/handling reports from the F1-PRO. Is that the way to go? Good question. OK F1-PRO owners...here's your chance, post up those ride reports!! Is that the "ticket" for all out performance in the FX-1? At first glance, hacking up a SJ/144mm pump inlet tract and grafting it

didnt spend enough time on it at daytona.........

To bad, that week just wasn't long enough. I wanted to check your ski out & ask you some questions...(show & tell stuff). BTW, it looks like it would be killer ride! Have to check it out next year.
hopefully will get some tray time this weekend if I can find out where I left my spark! :rocketwhore::thumbsdown:
:smoker:?

FWIW.....Jeff told me the reason for the setback pump in that boat is that it cures porpoising.....I never had problems with a stock fx porping, but I also never had one with a 144 pump either.
:fingersx:

Can't that be cured with a ride plate, and or with some minor nozzle trim adjustment?
Porpoise?...which end?

Once again, sorry for the thread jack filler.

 

[Melmack]

Good stuff. Thanks. So, my question is: Did any of your skis have the pump cavity carved out, or are they all the stock pump cavity? And does anyone have a stock or cheap FX-1 ride plate???????? :1zhelp:

 

[Flash-FX]

Good stuff. Thanks. So, my question is: Did any of your skis have the pump cavity carved out, or are they all the stock pump cavity? And does anyone have a stock or cheap FX-1 ride plate???????? :1zhelp:

No, all the FX guys in our group have basically stock inlets. The Blowsion (Johnny's) conversion has a metal pump shoe custom fitted.

We are on the lookout for spare ride plate(s).

 

[Melmack]

Gracias. that's all that's keeping this thing in pieces.

 

[Idok]

No, all the FX guys in our group have basically stock inlets. The Blowsion (Johnny's) conversion has a metal pump shoe custom fitted.

We are on the lookout for spare ride plate(s).

butti just made one up last week that came out KILLER

ive been trying to get him to make a mold off of it as fx ride plates are tough to come by..


maybe if you flood his inbox with rideplate requests he'll do it! :headbang: