Supercharger bolt-on

[bsreid]

Because it’s a larger in diameter by an inch you also increase your pitch too. Oh and also the larger diameter will give you more bite. I’ll report back next week.

[UNSTUCK]

That is extremely useful info, and thank you!! I knew the block was the same, and wasn’t sure if the SC was the only difference. Wasn’t sure about pistons, heads, and injectors. Didn’t consider the tune, which would be a major sticking point.

Sounds like a night and day difference to me. Sounds like we run pretty close to the same altitude and crew. With a crew of 14, I would be lucky to be able to run 30% of the stock ballast, 0 PnP, and 0 lead. So maybe a total of 800-1000 total ballast. And I would struggle to hit 11mph, with that.

Maybe the trans, which has been mentioned in other posts I’ve made, is a viable option. I would probably always fear reliability with an add-on supercharger, which I wouldn’t have to do with the trans, as well.

Thanks for the reply and ideas! I appreciate it. It sucks to even have to figure this stuff out with a $100k boat. It really sucks when I’m out with the rest of the guys I’m with running G23s, and they aren’t having an ounce of struggle.

I saw someone say “you should have bought your 2nd boat first”, and I couldn’t agree more. I would have a 575 and triple axle trailer, and it would have transom straps. I love 90% of this boat, but have some pretty significant disappointments in a few pretty major areas.


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Well I should have bought my 3rd boat first. Took me a bit longer than most I guess. I went the rounds trying to put together a supercharger plan for my GM based Indmar in my MB F24. I dove way too far into Indmar and how they "build" engines and squeezed them for a lot of info. They actually proved to be a lot of help. The raptors are good motors, but I hate that they take a NA engine and basically slap on a blower. At least when they were using GM engines, GM designed the LSA engine to be supercharged, so it had added strength. I still couldn't overcome the tuning issue in a clean enough way to make me happy.
I looked at quite a few blown RZX3's and came very close to purchasing two of them. In the end I wasn't comfortable with the payment I would have had. I gambled BIG time on the 440, against advice from a lot of very knowledgeable people. The 2:1 is the key. Anything else I feel is a waste above sea level or at least far above, like we are. I'm not sure what it is about the 440 that they were against. I have never felt the need to go 40mph, and don't think this boat will do it. It wont do wakeboard speeds fully loaded with all the ballast. It will do it with just less like 18-20 mph though. The speed my kids ride at. In short it does everything we need. I can't imagine I would be doing anything more with this boat if it was blown. Then again, if I had friends with G23's I wouldn't have gotten a boat. Now I am the friend that owns a boat.

[Zackdogg]

Supercharger bolt-on

Well I should have bought my 3rd boat first. Took me a bit longer than most I guess. I went the rounds trying to put together a supercharger plan for my GM based Indmar in my MB F24. I dove way too far into Indmar and how they "build" engines and squeezed them for a lot of info. They actually proved to be a lot of help. The raptors are good motors, but I hate that they take a NA engine and basically slap on a blower. At least when they were using GM engines, GM designed the LSA engine to be supercharged, so it had added strength. I still couldn't overcome the tuning issue in a clean enough way to make me happy.
I looked at quite a few blown RZX3's and came very close to purchasing two of them. In the end I wasn't comfortable with the payment I would have had. I gambled BIG time on the 440, against advice from a lot of very knowledgeable people. The 2:1 is the key. Anything else I feel is a waste above sea level or at least far above, like we are. I'm not sure what it is about the 440 that they were against. I have never felt the need to go 40mph, and don't think this boat will do it. It wont do wakeboard speeds fully loaded with all the ballast. It will do it with just less like 18-20 mph though. The speed my kids ride at. In short it does everything we need. I can't imagine I would be doing anything more with this boat if it was blown. Then again, if I had friends with G23's I wouldn't have gotten a boat. Now I am the friend that owns a boat.

Pretty funny how close our stories actually are!! I read a lot of that, about the Raptor and LSA on a different forum that was a couple of years old. And I don’t need 40mph, especially on the lakes we spend most of our time on. One of my buddy’s that has a G23 said “I don’t know how fast mine goes ,top speed, because I don’t need to go that fast”.

I do miss the days, not owning a boat, and being able to ride all day without having to clean, maintain, tow the thing around, make a payment, and all that. It sure is nice to go when and where I wanna go, though.

It’s just a matter of figuring a few things out, I guess.

It sounds like the trans may be my answer. It’s going to the dealer, next week, he’s going to make sure it’s running right, which it seems to be, and research prop options. Maybe the 985 would give it enough extra if it’s close.




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[BrewKaiser]

If you are at Lake Tahoe, West Coast Boat Center is a Tige dealer. Their Tahoe shop is on North side. They sell and service mostly Cobalts out of their Tahoe shop. I suspect their Rocklin center is where most, if not all, of their Tige sales and service happens. Disclaimer: I’ve not been impressed with their service department so far.

I was informed that it’s not possible to convert to 2:1. Shaft angle, mounts, everything set up different for 2:1 vs 1.5:1

[Zackdogg]

If you are at Lake Tahoe, West Coast Boat Center is a Tige dealer. Their Tahoe shop is on North side. They sell and service mostly Cobalts out of their Tahoe shop. I suspect their Rocklin center is where most, if not all, of their Tige sales and service happens. Disclaimer: I’ve not been impressed with their service department so far.

I was informed that it’s not possible to convert to 2:1. Shaft angle, mounts, everything set up different for 2:1 vs 1.5:1

Yeah, west coast is the Rocklin dealer. Sounds like they only have the guy at tahoe a couple of days a week, and during the summer. He said he’d schedule me with him, but I was better off taking it to Rocklin. I’m in Reno, so it’s only like 45 mins further to Rocklin, I can get it in sooner, and sounds like they might be a little more competent. Just from my phone convo.

They haven’t been much help, with anything over the phone. Guess I’ll find out in person. I can deal with crap customer service if they can do their job, and fix my stuff. Not sure what I’ll do if they can’t. Boise is like 6 hours away..

And the trans info isn’t what I wanted to hear!! I may call Tige and indimar to see what I can find out. Kind of waiting to hear what the dealer says next week. Maybe they’ll have some answers.


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[Zackdogg]

If you are at Lake Tahoe, West Coast Boat Center is a Tige dealer. Their Tahoe shop is on North side. They sell and service mostly Cobalts out of their Tahoe shop. I suspect their Rocklin center is where most, if not all, of their Tige sales and service happens. Disclaimer: I’ve not been impressed with their service department so far.

I was informed that it’s not possible to convert to 2:1. Shaft angle, mounts, everything set up different for 2:1 vs 1.5:1

Yeah, west coast is the Rocklin dealer. Sounds like they only have the guy at tahoe a couple of days a week, and during the summer. He said he’d schedule me with him, but I was better off taking it to Rocklin. I’m in Reno, so it’s only like 45 mins further to Rocklin, I can get it in sooner, and sounds like they might be a little more competent. Just from my phone convo.

They haven’t been much help, with anything over the phone. Guess I’ll find out in person. I can deal with crap customer service if they can do their job, and fix my stuff. Not sure what I’ll do if they can’t. Boise is like 6 hours away..

And the trans info isn’t what I wanted to hear!! I may call Tige and indimar to see what I can find out. Kind of waiting to hear what the dealer says next week. Maybe they’ll have some answers.


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[UNSTUCK]

I was informed that it’s not possible to convert to 2:1. Shaft angle, mounts, everything set up different for 2:1 vs 1.5:1

My RZX3 started its life as a 1.xx:1 (same as Zack's is now). It has a May 2016 build date, so it was one of the first 2017's on paper. It is now very happy as a 2:1.

In my course of picking a boat, I also almost purchased an RZX2 that I was planning on doing the swap on. I'll go through my emails and find the one from Tige giving me the part numbers to what is needed for the swap. My biggest fear was that I would have to modify the hull to make it all work. I was informed that you may have to enlarge the prop shaft through hole just a bit, if at all. That was it. Otherwise a pretty straight forward swap.

[freeheel4life]

My RZX3 started its life as a 1.xx:1 (same as Zack's is now). It has a May 2016 build date, so it was one of the first 2017's on paper. It is now very happy as a 2:1.

In my course of picking a boat, I also almost purchased an RZX2 that I was planning on doing the swap on. I'll go through my emails and find the one from Tige giving me the part numbers to what is needed for the swap. My biggest fear was that I would have to modify the hull to make it all work. I was informed that you may have to enlarge the prop shaft through hole just a bit, if at all. That was it. Otherwise a pretty straight forward swap.

Shaft log(where shaft passes thru the hull) and getting alignment correct would be the big deal. Putting on a new strut isn't hard. Tige did your 2:1 swap at the factory Josh.
Engine alignment when done is going to change as the new strut is definitely changing shaft angle to allow for the larger diameter wheels. Not an impossible task as all though.

[Zackdogg]

Funny. I was set on figuring out how to supercharge this thing on Saturday, when I was last on the water. Now you guys have changed my thinking, at minimum. Only advantage I would see to putting a SC on there would be for resale.

Thank you guys for the info thus far, and unstuck, any more info would be killer.

You guys have any ballpark idea on what a price tag for this would be??

Trying to figure as much out, before I hit the dealer, as to how doable it is, which it sounds like it is, and what my options are.

I can’t be the only guy having these issues, I guess short of something being wrong with my boat, I can see at 6200’, but 4000’ doesn’t seem like a crazy elevation to me. And with all the guys running extra ballast, but I can’t even push the factory ballast, that doesn’t seem right. Or, maybe that’s why I’ve never seen another RZX on a lake here, I’ve only seen them at sea level. I’m as confused as much as anything else.


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[chpthril]

My gut says the 440 will have a little higher compression ratio then SC 575. This makes bolting an SC to the 440 even more of a challenge.

Anyone with tech specs or inside Indmar info confirm?

[talltigeguy]

Funny. I was set on figuring out how to supercharge this thing on Saturday, when I was last on the water. Now you guys have changed my thinking, at minimum. Only advantage I would see to putting a SC on there would be for resale.

Thank you guys for the info thus far, and unstuck, any more info would be killer.

You guys have any ballpark idea on what a price tag for this would be??

Trying to figure as much out, before I hit the dealer, as to how doable it is, which it sounds like it is, and what my options are.

I can’t be the only guy having these issues, I guess short of something being wrong with my boat, I can see at 6200’, but 4000’ doesn’t seem like a crazy elevation to me. And with all the guys running extra ballast, but I can’t even push the factory ballast, that doesn’t seem right. Or, maybe that’s why I’ve never seen another RZX on a lake here, I’ve only seen them at sea level. I’m as confused as much as anything else.


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I would run from it when I found out a guy put a supercharger on there aftermarket, and I suspect a lot of other guys would too.

It really does sound like you are not getting the full power of the stock motor. Getting to surf speeds fully ballasted should never be an issue. Wakeboard speeds, yes, but surf speeds no. Best of luck figuring it out.

[BrewKaiser]

I would run from it when I found out a guy put a supercharger on there aftermarket, and I suspect a lot of other guys would too.

Totally agree! Not to mention voiding the engine warranty in the process.

Zack, I would take the easy approach first and see if there's anything wrong with your engine or tune. I would definitely take West Coast up on scheduling at their Tahoe facility so that they can test it in the environment that you're having the most difficulty with. Also saves you the hassle and gas of trailering down and back up 80. I would then try different props. Have you spoken with ACME about it? They are a great resource. I spoke with them about my 2775 prop and adding some more cup. They did it for like $100 and it worked like a charm.

As far as adding a SC or changing the transmission, based on my experience with West Coast I would not recommend them for such a large undertaking. Don't get me wrong, good guys, new service manager has years experience, but I've had a lot of little issues that take multiple trips. So this leaves you Boise or down to Germain in AZ.???

I have a '17 RZX2 with a 440 and feel like there's plenty more to give (granted at 250' elevation). Maybe the O2 sensors are not working correctly and you're air/fuel ratios are not ideal at altitude. I'm just spit-balling here but you're not the only one running a RZX at altitude.

Good luck.

[Zackdogg]

My gut says the 440 will have a little higher compression ratio then SC 575. This makes bolting an SC to the 440 even more of a challenge.

Anyone with tech specs or inside Indmar info confirm?

Everything I’ve read, not saying that’s right, and I definitely need to do more research, is that it’s the same, with the exception of the charger itself. I would have guessed that the pistons or something would need to be changed.

When I posted this, I was hoping someone had done this, and had some info, and that’s not to say that I won’t find someone, at some point.


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[freeheel4life]

I'm curious, when you pull your bilge plug do you have a decent amount of bilge water?? Does you auto bilge ever run??

[Zackdogg]

Totally agree! Not to mention voiding the engine warranty in the process.

Zack, I would take the easy approach first and see if there's anything wrong with your engine or tune. I would definitely take West Coast up on scheduling at their Tahoe facility so that they can test it in the environment that you're having the most difficulty with. Also saves you the hassle and gas of trailering down and back up 80. I would then try different props. Have you spoken with ACME about it? They are a great resource. I spoke with them about my 2775 prop and adding some more cup. They did it for like $100 and it worked like a charm.

As far as adding a SC or changing the transmission, based on my experience with West Coast I would not recommend them for such a large undertaking. Don't get me wrong, good guys, new service manager has years experience, but I've had a lot of little issues that take multiple trips. So this leaves you Boise or down to Germain in AZ.???

I have a '17 RZX2 with a 440 and feel like there's plenty more to give (granted at 250' elevation). Maybe the O2 sensors are not working correctly and you're air/fuel ratios are not ideal at altitude. I'm just spit-balling here but you're not the only one running a RZX at altitude.

Good luck.

I hope you’re right, and something is wrong with my boat. I’m really not looking to go to the full extreme here, but I’m also not really wanting to just deal with a boat that costs that much, and not be able to do what I want with it. Which I also don’t think wanting to surf, with full ballast, is asking too much from a boat that’s designed to do that. It is semi-frustrating..

I’m assuming that means that you’re running the 2:1 trans?? All fingers point to that being a decent solution. I’m also going to take a guess, and say that’s, at minimum, partially why Tige went to the 2:1, because the performance from the 440 was a little lackluster.

I’m not planning on starting anything until winter, regardless.. maybe I’ll find something out, about my boat, before then and I won’t have to do anything, or maybe I’ll find a prop that fixes the problem. I talked to OJ, but haven’t talked to acme, I will call them, and appreciate you mentioning that. I would love to find out this is an easier fix than I’m anticipating.

To me, and maybe I’m being paranoid, the dude that sold me the boat, do with 27 hours. He was in Boise, similar altitude to me, and was moving to Denver, even higher. Was that because this thing is a pig, and can’t push the weight at this altitude?? Maybe..

I’m assuming that the service manager is who I talked to this morning. He seemed pretty sharp, and willing to help. He’s the one that talked me into taking it to them, down there, opposed to tahoe. It’s also for a leaky ballast situation, which I also want fixed properly. He convinced me that it was better if I could take it down there, so I’ll stick with that, for now. If it needs to go to tahoe, to be checked at altitude, I’ll take it there too. Really the trailering and gas don’t mean nearly as much as saving the rest of my summer. I’ll be gone for a little over a week, so I told him he could keep it that entire time, and do what he needs to.

Hopefully I don’t get to the point where I need to trade this thing on a G. I love a lot about this boat, but I’m also not willing to settle for “it almost works right”. Screw that!!


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