- Location
- South Africa
A stock snorkel 760 intake is too small for a stock 760 with just a pipe, going to hold your setup back. It can be improved by trimming up the centre lump on the engine side. Filters will be better
Help me select parts for HPE 809 swap.
- Thread starter bernard
- Start date
I'm going to port match it to 46mm as well. I disagree with the sentiment that the snorkel is too small. The 2D area of the snorkel opening (not including the opening on the inner side) is pi 40^2= 5026.55 (it has an 80mm diameter) The surface area of the two carbs combined are pi 23^2= 1661.9 times 2= 3323.8 much smaller. The screens have plenty of surface area as well. It looks like a really well designed piece to me, not sure what I'm missing.
- Location
- South Africa
I know from experience, I guess you don't like hp
- Location
- South Africa
The formula L/D5 comes into play
I'm worried about sound. There's nothing more ear piercing than a wide open two stroke. I've sold some piped bikes because it was damaging my ears. My view on the waterbox is that I just need a bit more free flow and I should be good.
I'd be interested in the details of that experience. How did you determine that the oem spark arrestor was costing you power vs pods?
I know that removing the top half of the oem air intake, or even just removing the rubber elbow, can make a pretty noticeable difference in jetting, but I didn't notice any difference in actual power once the jetting was sorted out. It is possible that there is some power there to be had and I just didn't notice it.
For what it's worth, if you dig around some of the old posts when Tim Tynan was still active on here, he said that even the modified factory pipe waterbox that he himself had helped develop was not any advantage for motors under something like 800cc's. I'm sure that is a much simplified statement each individual combination of motor and pipe and tuning and so on is probably different, but it seems like about the only/best bit of info on the subject that I've been able to find and implies waterbox is not a great place to be looking for power.
He has the 08+ waterbox and the only reason he's modifying it is so he won't get detonation at WOT like those boxes are notorious for.
http://www.x-h2o.com/index.php?threads/superjet-waterbox.183834/#post-1941642
That's the post I was thinking about. By no means is that the final last word on the subject, just something that stuck when I saw it.
What modification do you do to prevent detonation at WOT? I had no idea that was a thing that those stock boxes were notorious for.
That's the post I was thinking about. By no means is that the final last word on the subject, just something that stuck when I saw it.
What modification do you do to prevent detonation at WOT? I had no idea that was a thing that those stock boxes were notorious for.
- Location
- South Africa
Added a Riva drypipe to a WB2, ran rich even with HS screws all the way in. Removed plastic airbox and it revved out. Also most people don't know how restrictive their hull air intakes are. You need to strap ski to trailer in the water and rev the ski up and try lift the hood. If it lifts easily you are good, if not, you are suffocating the engine.
Yes and yes if you are running a zeeltronic/760 setup. About balancing, never seen anyone do it on the zeel setup, I think they are fairly balanced still after magnets are removed. The third lump should not need to be removed much longer as a software update for the zeel will ignore the lump if I am not mistaken. If you get another flywheel you can have one of each and its as simple swapping the flywheel for charging or TL.
Lots of info here and great place to ask
http://www.x-h2o.com/index.php?thre...pgrade-box-270usd.188177/page-34#post-2026273
http://www.x-h2o.com/index.php?thre...pgrade-box-270usd.188177/page-34#post-2026273
