So I have a freshly built 61x/62t 760cc engine. Ada head with 701 35cc domes (just got 760 38cc domes but not installed yet), light porting, Factory b pipe limited chamber, stock 38's 135/75 jets, Jetmaniac/#zero flywheel, Cold Fusion billet couplers, Skat Trak 9/15 impeller, stock 61x electronics, and a FCV(not installed yet). The ski has great power and after riding a stock 701 I can definately feel a big difference in response and power, it just doesnt really feel like I have enough bottom end power to help with flat water freestyle stuff. I have heard that running a single carb will produce more bottom end power but not sure if that is true. Anyone have any thoughts on what mod/mods to do next to help get more low end power?
Freestyle Wanting more bottom end power
- Thread starter 'kotajoe
- Start date
- Location
- Bakersfield
I'm pretty sure that a single carb would reduce your power. more gas plus more air usually means more power
my guess would be a mag pump or higher comp. domes with race gas
my guess would be a mag pump or higher comp. domes with race gas
OCD Solutions
Original, Clean and Dependable Solutions
- Location
- Rentz, GA
You have a pretty good base to start with so I would be looking at your carbs and electronics next. I would stick with duals and either bump up to a set of 46's or if you have budget constraints, look at modding those 38's. Taperbored 38's are very impressive for their size and cost.
As for electronics, if you are truly serious about flatwater tricks, i would get an MSD enhancer at the very least and if budget permits, look at MSD Total loss and ATP EPIC or FLAME setups.
Depending on porting, you are likely to be looking for 34-35cc domes on that 760 to get your compression in the 185-190psi range. I like pump gas so I went with 35cc's on mine to net 185psi.
As for electronics, if you are truly serious about flatwater tricks, i would get an MSD enhancer at the very least and if budget permits, look at MSD Total loss and ATP EPIC or FLAME setups.
Depending on porting, you are likely to be looking for 34-35cc domes on that 760 to get your compression in the 185-190psi range. I like pump gas so I went with 35cc's on mine to net 185psi.
SXIPro
JM781 Big Bore
- Location
- Here on the 'X' mostly
More skill. I am in the same boat. My ski is far more freestyle worthy than I am.
Big Kahuna
Administrator
- Location
- Tuscaloosa, AL
I would learn to ride your ski. To the point of you mastering every trick and needed more power..
you have a good setup. I would look into the MSD Enhancer. sell the prop and get a 9-15 Hooker. The carbs are ok for your setup. One of the strongest hitting setups I have ridden was a Wamiltons built big bore with 38's. It worked.
you have a good setup. I would look into the MSD Enhancer. sell the prop and get a 9-15 Hooker. The carbs are ok for your setup. One of the strongest hitting setups I have ridden was a Wamiltons built big bore with 38's. It worked.
swapmeet
Brotastic
- Location
- Arlington TX
Maybe overlooking the obvious, but are you sure that your carbs arn't the problem? Since its a new motor/engine its possible it might not be right.
K.I.S.S. amiright?
K.I.S.S. amiright?
- Location
- Cruising Around
I keep hearing about wanting "bottom end power". Are'nt we really looking for how quickly we can get to the mid-high power. Like how can I get to the real power made by a 2 stroke the quickest? That being said I like your set-up and what others are saying as far as ignition upgrade and more carb.
Big Kahuna
Administrator
- Location
- Tuscaloosa, AL
Totally different prop designs. You cannot go by the numbers, not even by the same manufacturer. The Hooker was designed by IMPROS, Dave use to work for Skat. Dave has taken everything good about the Skat and Solas props and basically combined them.
- Location
- Cruising Around
Does'nt Skat make the Hooker?
- Location
- Cruising Around
Also on my 2 smoke dirt bikes I set up for trail riding I would add flywheel mass to try for more torque and it would make more tractable power. On our skis we try to lighten the drivetrian for quicker revving to get into the mid-high power that 2 smokes are known for. Go back to stock flywheel and see how it feels.
Increased flywheel mass will not result in more torque per say. (Torque is just force around a fulcrum)
A flywheel is a mechanical energy storage device. When you get the RPM's up, that flywheel stores energy. That means that it will take longer to spool up the motor because some power is going into the flywheel - less torque on the spool-up.
On the flipside, the motor will be better able to maintain power as you let off the throttle or other factors try to slow the engine down - because as the engine slows down, the flywheel will give its stored energy back to the engine. More torque on the spool-down.
Great for motorcycles and race skis. Freestyle skis, not so much.
A flywheel is a mechanical energy storage device. When you get the RPM's up, that flywheel stores energy. That means that it will take longer to spool up the motor because some power is going into the flywheel - less torque on the spool-up.
On the flipside, the motor will be better able to maintain power as you let off the throttle or other factors try to slow the engine down - because as the engine slows down, the flywheel will give its stored energy back to the engine. More torque on the spool-down.
Great for motorcycles and race skis. Freestyle skis, not so much.
Last edited:
- Location
- Cruising Around
Thats what I'm getting at Matt. Everyone talks about getting the low end power here but really what they mean is how do I get to the mid-high power band of the 2 smoke motor where they make the most nutz. How do I get from the 20hp to the 100hp my motor can make the quickest. I aint no motor guru but we don't ride Powerstrokes out here on the water.
Big Kahuna
Administrator
- Location
- Tuscaloosa, AL
Not sure who is actually forging them for IMPROS, could be, just like FPP builds the PFP pipes. But the Hooker is Daves design.
Big Kahuna
Administrator
- Location
- Tuscaloosa, AL
The Flywheel weights are added to a 2 stroke to gain better control of the power band. If you take a YZ 250 and try and put it in tight woods, you are not going to be able to use the power real well and most likely foul plugs, Now you add weights to the flywheel it slows up how fast the motor revs and gives you more usable power. It is not giving you more torque, it is letting you use the torque that is there instead of constantly spinning your tires.