951 with Pro-K pods

[Mekanix]

Just curious what everyone's preferences are for jetting going from airbox to prok filters. And with or without the accell pump.

 

[mikidymac]

Why, the stock airbox flows more air than the stock engine can use and is almost waterproof.

 

[Mekanix]

Oh, mainly to make it easier to remove and the reinstall the carbs, change jets, test and tune and then fight with it later. There shouldn't be a difference with airflow but its just always a pain to remove and replace.

 

[mikidymac]

Yes, you will have to rejet and lower your pop-off, I don't have the specs but Matt B. might.

Just make sure only you ride the ski and don't ever let water get into the carbs.

 

[Matt Braley]

With your accel pump still active 85 lows and 165 highs. If you delete the accel pump then 95 lows. Pop off 19ish. I did not invent this jetting but I've proven it true many times. It comes from a wave jumping/racing Aussie that goes by "Surf n Turf".

 

[Mekanix]

Yes, you will have to rejet and lower your pop-off, I don't have the specs but Matt B. might.

Just make sure only you ride the ski and don't ever let water get into the carbs.

So probably not such a good idea on an early model xp, but maybe on an rx or gtx? Since the vent tubes are so close to the intakes.

 

[Mekanix]

With your accel pump still active 85 lows and 165 highs. If you delete the accel pump then 95 lows. Pop off 19ish. I did not invent this jetting but I've proven it true many times. It comes from a wave jumping/racing Aussie that goes by "Surf n Turf".

With the accell I'll try the 85 and 165 just to see what happens.

That's only a small change from 80/167.5
How sensitive is the popoff?

 

[Matt Braley]

Not too sensitive. If you get into the mid 20's or higher you end up turning the low speed adjusters out trying to get a good jump instead of a bog.

You can get pre-filters to help let air in without the water. Here is an example Universal Black Pre-Filter for Prok, Blackjack & Tau Ceti Filters - 20-1055-01 | eBay

 

[Mekanix]

Oh yes I have those too