08-25-2009, 09:43 AM #1
GPR owner's, suprise, cowling blocked-off!
Jeese, I guess I gotta get the dremel out! I swiss cheesed the bucket/cowling last year and I ASSUMED that the right side of the cowling was open. My beef is that I wonder how the right-side ducting/trunk-line ever got air in stock form? No wonder why the seat used to suck air....
08-25-2009, 09:45 AM #2
before you get your dremel out spend 5 minutes on the ski with the seat off and see if the extra air makes a RPM difference.
I have done it several times when i was still a 2 stroke and it didnt make a lick of difference.
08-25-2009, 11:14 AM #3
...good point mr... It would certainly be nice to get a bit more top-end especially since the design of the hood is such that it lends itself to the 70's muscle car type ram-air effect. My issue is that when I went to the race filter and bucket cheese, the seat didn't suck air quite as much, and so I also figured the black blanking plates under the side cowling venturies were there to be removed by racer's. Afterall ,the right-side open duct lines don't serve much of a purpose otherwise, no?
RPM's will indeed be the tale tale, but also if I get more responsiveness from low to midrange, it's worth doing, yes?
08-25-2009, 09:39 PM #4
- Join Date
- Aug 2008
u can cut it out with a utility knife (new blade of course) heating the blade makes it that much easier, dremel may be a bit much, as for gains, can't say it did a thing but feel better knowing more air is in there
08-26-2009, 07:55 AM #5
you missed the point. 70's muscle car is still not a 2 stroke.
take out the stock intake pipes inside. if you get porting/bb/sonic booms then you should start worrying about getting more air. the bucket/hood mod is all i have done and i'm doing just fine. next i will do the seat air mod if i think i need it. but the cowls-to me- are a waste of time.
08-26-2009, 08:25 AM #6
1. Doesn't more air flow increase the likelihood of more fuel/air mixture viz. the venturi effect?
2. Why do the seats on the stock gpr's suck air?
3. Why is there a difference in air flow theory between a 2 and 4 stroke; isn't adding more flow to the motor beneficial in either case?
Sorry for all the questions.
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