Freestyle engine questions. Opinions welcome

East623

East623

Location
Social Circle, GA
So I bought a hurricane c2 carbon with JM 735 engine and stock carbs. Ski runs awesome but since winter is approaching I would like to get more power out of it in my spare time. If some experienced builders could chime in that would be swell as this is new for me.
Should I put oversized carbs on my ski as is with a 144 12 vain mag pump?
Should I go ahead and go big bore? (Bigger) and big carbs? How big of carbs in relation to engine side is best for bottom end?
Carb brands? Are Mikunis for a budget rider good? Or should I go Novi, buckshot, Dasa or what?
I ride motocross and have my entire life and I'm not kidding when I say I'm astonished at the amount of AM part combos I've seen when it comes to engine performance. I really can't put another 10,000 into an engine as this isn't my main hobby but if I could sell my jetmaniacs engine and then spend an additional 3-4K on a beast setup would that be the way to go? Damn this stuff is confusing.
 
East623

East623

Location
Social Circle, GA
Jetfiend said:
Do yourself a favor, find a good local builder and follow their recipe.. Otherwise, you're going to spend way more money, time and sanity than you can imagine!
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The sanity part was lost as soon as I got a standup I assure you Hahaha. I like to do the work myself though, that's part of the fun. I have a really good base platform right now for my skill level but I just want to improve on it this winter. I hope someone on here can give me a push in the right direction. I don't need a world championship ready ski, I want something fun, reliable, and really powerful without me having to take out a 20k loan lol. Also I live in Georgia, the standup scene as far as performance goes is slim to none here.
 
SpaceCowboy

SpaceCowboy

breaking something
Location
Ypsilanti Michigan
Jetfiend said:
Do yourself a favor, find a good local builder and follow their recipe.. Otherwise, you're going to spend way more money, time and sanity than you can imagine!
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Best advice. Lots of builders have been around doing it for long time. Why reinvent the wheel? If you want to turn some bolts and tighten nuts have them ship it not assembled lol. Any of the companies DASA, PHP, TPE, XScream, etc will talk with you on the phone and let you a know setup. Jetfriend said it best.
 
tntsuperjet

tntsuperjet

Tntperformance-engineering.com
Location
Georgetown ca
My two cents
I'm assuming your 61x or 62t Cyl that's 83 or 83.5 bore.
Stock Cyl has limited transfer port tunnels and big bore sleeves really cut down there volume.
Since your newbie and moto is your primary, use the stock 46mm carbs and you save yourself a lot of tuning headaches.
Even on my pro level riders freeride boats I run stock 46's. They just stay running good day to day without need for constant fine tuning.
Depending on what pipe you have you may have some gains there to be had.
So I go with stroker crank.
You can buy a 4mm PHP light weight crank and it's a bolt in on bottom end side.
You will need some head work to get the squish clearance set.
Then next year you can upgrade the Cyl and it will get even better.
The TPE 1021 is a rippin little dude.
That 1021 is a 964 Cyl with 4m stroker.
Best bang for buck with all American made products !
Depend
 
Tommygunz

Tommygunz

Team PHP
Location
Wisconsin
Jetfiend and Spacecowboy are right on the money! I would say to contact a few of the builders and see who truly takes their time to talk to you and explain how the components work to make a reliable and powerful ski and then make a decision based on that. There are a few builders out there who truly are passionate about making great skis, not just money.
 
DAG

DAG

Yes, my balls tickled from that landing
Location
Charlotte, NC
East623 said:
Also I live in Georgia, the standup scene as far as performance goes is slim to none here.
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You live right outside of Atlanta. I would send @Jr. a message here as he is very local to you and is a phenomenal tuner & engine builder. Also there are plenty of riders in your area hit up GA Jet Pirates on facebook. And if you are not aware there is a huge ride on Lake Altoona Oct 14-16th http://www.x-h2o.com/index.php?forums/southern-fried-freeride.169/ see ya there
 
cookn

cookn

Kamikaze
Location
where you live
I say get MSD total loss for the motor you have and upgrade to the 46mm carbs like mentioned above. Add the better pump, if spending the money might as well go bigger on that as well. A 148 mag or even the oem 155 and then buy a low pitched prop for it and you should get all that in the 3-4k extra you wanted to spend. you can make small motors rip hard, its all in how you set them up. I have ridden a 735 ported engine with total loss and 48mm carbs with a oem 144 pump setup with tbm cone that would pull harder then a dasa 950 with oem 144, but thats just the way the dasa was set up and had no total loss. Dont let all the fancy stuff fool you into spending alot of money when the motor you have is way easier and cheaper to run when just starting and has lots of power left on the table, Again not saying that all the aftermarket motors are not awesome, but a jetmaniac motor has some good porting and is a good base to learn to wrench and tune on with lots of parts available at reasonable cost. I get the wanting to wrench on your own stuff thing so just my two cents on the matter.
 
Blue

Blue

Judging your cheapness
Location
St Cloud Florida
What type of riding do you prefer as that will help determine where to spend your money.
Flat water??
Surf??
Boat chasing??
Remember everything is a give and take. If you surf ride huge power is not necessary. If you flat water ride and flip then things like big carbs and total loss are great but at the expense of ride time per tank of fuel and distance you can travel from your riding spot.

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East623

East623

Location
Social Circle, GA
Blue said:
What type of riding do you prefer as that will help determine where to spend your money.
Flat water??
Surf??
Boat chasing??
Remember everything is a give and take. If you surf ride huge power is not necessary. If you flat water ride and flip then things like big carbs and total loss are great but at the expense of ride time per tank of fuel and distance you can travel from your riding spot.

Sent from my SAMSUNG-SM-N920A using Tapatalk
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This C2 hurricane hull with this short as hell X metal pole aren't very good for boat chasing anyways but I do have friends on the water that set me up behind their boats and the occasional random dude who just thinks skis are sick. So mostly what I'm doing is flat water. Our riding spot is a few miles by water from my house so I'm going to build a floating water trailer to pull behind a sit down or my pontoon that will carry our skis, that will take care of the fuel problem.
 
East623

East623

Location
Social Circle, GA
From what I am reading (and I greatly appreciate everyone's opinions on my current situation) I guess I'll go with my original plan that I had before I bought the ski. During the winter save my coins and ride motocross like always and get some oversized carbs for the JM 735 engine that I have and a mag pump, 144 most likely due to money and an msd total loss ignition. What size carbs do you think I should look into and what brand? Seems like there is a lot of options.
 
Ducky

Ducky

Back in the game!
Location
Charlotte, NC
Itll take a little time to get used to that shorter pole and chasing boats, but itll feel normal after some more riding.

You should definitely come to the southern fried freeride and test ride some other boats with different setups and see what you may like.
 
East623

East623

Location
Social Circle, GA
Ducky said:
Itll take a little time to get used to that shorter pole and chasing boats, but itll feel normal after some more riding.

You should definitely come to the southern fried freeride and test ride some other boats with different setups and see what you may like.
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I would definitely be down for that but I have a company trip to Las Vegas that same weekend.
 
cookn

cookn

Kamikaze
Location
where you live
all the aftermarket carbs are good, find some carbs that someone is willing to give you jetting specs for what you are running or sort through the carb jetting data base on here and find a similar setup. The total loss really wakes up the engine with the ability to pull your aggressive advanced timing as rpms increase. I would contact blue or jetmaniac and see what they have to say since you already have their motor and im sure someone has already run the style of setup you are going for. The ski I rode had 48mm riva powerbombs on it, but riva doesnt make those carbs anymore to my knowledge. If you cant find the specs you need I can go back through some stuff and prolly dig you up jetting and timing curves from what guys around here have run.
 
Blue

Blue

Judging your cheapness
Location
St Cloud Florida
If you can then go with a 148 pump not a 144. If you want to make the ski move then move more water. If a 155 would fit even better.
Next for flat water would be total loss, bigger carbs, and more compression which means at least 50/50 mix of race gas. I would do at least dual 46mm mikuni carbs and if you can afford it Novi 48mm carbs. Make sure you get a good intake and Vforce 2 reeds. Your motor is capable of alot more power but most want to run 38mm carbs and pump gas so thats how most engines are set up. However it is ported to flow all the air you can give it.

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