Thread: somethings possibly forgotten?
02-26-2014, 09:49 PM #1
somethings possibly forgotten?
concerning the brp spark mods,
has anyone considered oil blowby issues and how they are addressed?
how much power and torque is needed before the engine explodes?
I can see the there should be a happy medium between having as much power but also torque and very importantly a good prop pitch.
reliability is good if your not racing it.
the reason im asking is because a pwc of this size and weight will be ideal for running the class 4 and 5 rapids I have here at home and I need acceleration above all so I can get away from what I need.
I understand everybody wants top speed but this machine seems more like a freestyle motocross bike than a bmw hp4 or a hayabusa....if I can use the motorcycle analogy.
and also will the mods be overpriced?
the reason im asking(again) is because I don't think spending as much on your mods as you spent on the ski makes sense and kills the spirit for anyones' desire to have a little more out of there pwc.
thanks for reading
02-26-2014, 10:14 PM #2
- Join Date
- Aug 2012
That wasn't overly clear.
But I wouldn't be running any pwc near rapids. But if you are, I wouldn't do it with a spark. I'd think you would get tossed around from lack of power actually being put down. I'd rather have a little weight in the rear end to keep water flowing through the intake great.
I also think it's an unstable platform for what you are trying to accomplish.
02-26-2014, 10:25 PM #3
actually all of the above is not true but nonetheless it sounds logical.
ive been running 4 years in these same rapids on a 1992 Yamaha superjet totally stock,and I know of many other guys on jet skis and much older and smaller pwc's.
right not I have a heavily modded aquatrax f15x and while its still fun and doesn't fatigue me as much it does lack nimbleness.
02-27-2014, 06:26 AM #4
We've done destruction testing on our engine management systems for the spark.
We would not release maps if they are not safe for longevity.
We have a rule at vtech, where we prefer owners to have their tuned engine last 300+ hrs rather than 15-20 hrs.
If it makes any interest to about blow by, we noticed no loss in compression with over 10 psi boost for 1 hr on stock compression.
Obviously we won't post all our testing publicly but you can rest assured when you go with vtech, we have done all the testing for you.
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