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May 31st, 2010, 11:37 PM
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#1
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Join Date: Dec 2009
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Snorkeling 2008 BF 650i
What are you guys using to snorkel a 2008 650i? I read a lot of conflicting suggestions:
- 2" pipe is okay or not okay
- 90's are okay or not okay
- have to rejet vs don't have to rejet
I'd like to hear from guys that have done it and can say for sure. The local dealer said he has done 2" snorkels on 650's without jetting, so I'm curious. When I bought my mud lid, I was told I didn't have to rejet, which was true, but I lost power so obviously I'm running lean.
If snorkels mean rejetting, then I won't waste my time, and I'll stick with my mud lid. But if you guys are doing it and not losing performance, then I'd like to do it.
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'08 Brute Force 650i, 27" Swamp Lites, Maroon Primary Spring, Almond Secondary Spring, Snorkels, 2500lb Warn Winch, Kimpex box, All Balls 12mm Tie Rods+Ends, PowerMadd Hand Guards, Heated Grips, Custom Skid Plate and A-Arm Guards, Relocated Rad, ITP 312's, 2" Rubber Down Custom lift
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June 1st, 2010, 12:22 AM
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#2
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Join Date: Aug 2008
Location: Albuquerque, NM
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Quote:
Originally Posted by hayneser75
What are you guys using to snorkel a 2008 650i? I read a lot of conflicting suggestions:
- 2" pipe is okay or not okay
- 90's are okay or not okay
- have to rejet vs don't have to rejet
I'd like to hear from guys that have done it and can say for sure. The local dealer said he has done 2" snorkels on 650's without jetting, so I'm curious. When I bought my mud lid, I was told I didn't have to rejet, which was true, but I lost power so obviously I'm running lean.
If snorkels mean rejetting, then I won't waste my time, and I'll stick with my mud lid. But if you guys are doing it and not losing performance, then I'd like to do it.
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I have not done it but the concept is simple. The stock Brute intake system is designed to meet epa noise requirements. To acheave that, they must be forced to hold a certain level of vacuum at RPMs higher then about 1600. They jet it accordingly. Any change in that vacuum level either less or more will cause the need to change main jet sizes. Ok, now, the intake opening of the box is designed to maintain a specific restriction throught the RPM Range. Something the mud lid wasn't designed to do. So, if you snorkle, and it provides no additional restriction, then you won't have to rejet either way. That's just fact. For the 750, 2" snorkles do restrict the airflow and in most cases will require rejetting. Now more and more people are going to the 3" snorkle setup as this doesn't cause restriction. I would recomend that for the 650 as well. Remember to top it with the 180 degree long sweap and face it back. MIMB had several how Tos and have this down pretty well.
Hope this helps.
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June 1st, 2010, 02:14 PM
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#3
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Join Date: Nov 2007
Location: Kamloops British Columbia, Canada
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2" intake snork didnt work on mine without the trouble of re jetting. I would say 3" is a better idea. I got mad with trying to get mine to run properly with snorks and finally cut them all off
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2007 Rack Smacker 750 SOLD SOLD SOLD
2012 RZR 800
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June 1st, 2010, 10:04 PM
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#4
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Join Date: Dec 2009
Posts: 44
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Did you snorkel your 750 or a 650?
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'08 Brute Force 650i, 27" Swamp Lites, Maroon Primary Spring, Almond Secondary Spring, Snorkels, 2500lb Warn Winch, Kimpex box, All Balls 12mm Tie Rods+Ends, PowerMadd Hand Guards, Heated Grips, Custom Skid Plate and A-Arm Guards, Relocated Rad, ITP 312's, 2" Rubber Down Custom lift
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June 4th, 2010, 10:05 AM
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#5
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Join Date: Feb 2008
Location: Webster MA
Posts: 628
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Not sure on 650 but my 750 I did 2" with no issues. Of course it is FI so I had none to mess with.
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June 5th, 2010, 12:44 AM
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#6
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Join Date: Nov 2007
Location: Kamloops British Columbia, Canada
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Quote:
Originally Posted by hayneser75
Did you snorkel your 750 or a 650?
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my 750. i would think the 650 breaths very very similar to the 750..2" requires alot of work in the carbs.
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2007 Rack Smacker 750 SOLD SOLD SOLD
2012 RZR 800
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June 5th, 2010, 09:30 PM
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#7
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Join Date: Mar 2010
Posts: 73
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i have a 2009 650i and i went with 2" for my intake fully then for my belt i went 1 1/2" all the way to the racks then went up to 2", i rejetted bc i put the hmf exhaust with the k&n, my bike was running awesome at first then it started to pop alittle once i got to high speeds. then i filled out my rear plug and last weekin burn the oil ring i think. not sure if its from jetting and doing some of the stuff i did but she was a beast wen she was in the mud!!
RIP 2009 brute 650i
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