JTmachining Posted June 30, 2014 Report Share Posted June 30, 2014 So now we are getting somewhere. Me and my pops had this convo when I was putting the bigger K&N pods on. He said there's no way that my motor (or any really) can out flow the pod. And he brought up the point that it'll only become ineffective once the airflow causes the pod to collapse. Now I don't have a flow bench so I can't make any claims to actual stats or test. But I think the same thing. Wtf. So if a filter doesn't collapse it's providing enough air flow? Quote Link to comment Share on other sites More sharing options...
WINDYCITYJOHN400 Posted June 30, 2014 Report Share Posted June 30, 2014 Nobody owns all the answers on this topic. Here is some food for thought. I MY testing - small pods vs larger pod = 1 HP Large pods vs the big ones = Another 1-2 HP Next item to address.....Sprinklerman covered the flow potential on the filter media. BUT......Go start your machine and let it idle. Then rap the throttle and watch your Outerwear's cling to the filter like shrink wrap. The surface area of the Outerwear's need to flow too. The REAL ISSUE is not just flow.....but the energy/effort the MOTOR has to make to PULL that air thru the entire filter system. Quote Link to comment Share on other sites More sharing options...
JTmachining Posted June 30, 2014 Report Share Posted June 30, 2014 Fact and fiction are wat separate the winner from the loser. Quote Link to comment Share on other sites More sharing options...
locogato11283 Posted June 30, 2014 Report Share Posted June 30, 2014 I'm guessing that my builder knows more about these motor setups than anyone's pops. Just saying. Quote Link to comment Share on other sites More sharing options...
sheerider11 Posted June 30, 2014 Author Report Share Posted June 30, 2014 Wtf. So if a filter doesn't collapse it's providing enough air flow?No. I'm not gonna run the tiny pop up cones. I know those won't flow enough. But as far as 6-12" filters I can't see the 6" not being able to flow enough. Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
WINDYCITYJOHN400 Posted June 30, 2014 Report Share Posted June 30, 2014 No. I'm not gonna run the tiny pop up cones. I know those won't flow enough. But as far as 6-12" filters I can't see the 6" not being able to flow enough. Sent from my iPhone using Tapatalk ....on a S.S 4 mill. But a ported 10 mill Cub will lose 3 HP EASY. TESTED. Quote Link to comment Share on other sites More sharing options...
shanYE west Posted June 30, 2014 Report Share Posted June 30, 2014 do you run outterwears? its obvious that the outters restrict flow. which is why most dont use them. In that situation I would understand why the longer filters showed the gains. Edit: I couldn't find any info on the flow rate of the pre-filter material. It filters .005 microns. Quote Link to comment Share on other sites More sharing options...
locogato11283 Posted July 1, 2014 Report Share Posted July 1, 2014 Outerwears definitely restrict air flow. They should not be used in dusty conditions at all. They will plug up. Quote Link to comment Share on other sites More sharing options...
WINDYCITYJOHN400 Posted July 1, 2014 Report Share Posted July 1, 2014 Outerwears definitely restrict air flow. They should not be used in dusty conditions at all. They will plug up. The.....what....are....they....for? 1 Quote Link to comment Share on other sites More sharing options...
Bennett131 Posted July 1, 2014 Report Share Posted July 1, 2014 Outerwears definitely restrict air flow. They should not be used in dusty conditions at all. They will plug up.I'd rather they plug up than send the dirt into my engine. They serve a purpose, just not for everyone. I ride in coal dust and I use them. Quote Link to comment Share on other sites More sharing options...
special06shee Posted July 1, 2014 Report Share Posted July 1, 2014 He dont know. Its just what his builder told him. 2 Quote Link to comment Share on other sites More sharing options...
locogato11283 Posted July 1, 2014 Report Share Posted July 1, 2014 The.....what....are....they....for? We use them in the sand and that's it. I clearly remember waaay back when we had 4mm motors.. We were out riding in a dusty ass field one day. My brother's bike wouldn't run for shit. We fucked with that thing forever. After dicking with everything from top to bottom, we pulled the outerwears off. They were dusty as shit. Bike fired right up and ran perfect. They can and will plug up. You guys can run them. Just like you can run small filters. It doesn't matter to me. Quote Link to comment Share on other sites More sharing options...
shanYE west Posted July 1, 2014 Report Share Posted July 1, 2014 Outerwears definitely restrict air flow. They should not be used in dusty conditions at all. They will plug up. I've seen it.. they need to be cleaned constantly.. my truck is even bad.. Have to clean the damn thing like every other week. I live on a dirt road. Didn't realize it until one year I went to silver lake and got 8mpg on the way to the dunes.. Got to campground and cleaned the outerwear and got 11mpg on the way home. Pretty sure someone in LS last year or the year before had a outterwear plug up on them.. they pulled them off and the bike ran perfect. forgot who it was now. Quote Link to comment Share on other sites More sharing options...
sprinklerman Posted July 1, 2014 Report Share Posted July 1, 2014 According to several tech articles I've read a 130hp two stroke will "process" approximately 325cfm. That's less than half of what K&N says 2 of their 6" pods should flow. Just throwing data out there.....I give zero fukkaroo's what anyone runs for air filters. Btw..I can see benefits in running a larger filter especially in dirty conditions. .more filter area "should" extend service intervals. Quote Link to comment Share on other sites More sharing options...
shanYE west Posted July 1, 2014 Report Share Posted July 1, 2014 According to several tech articles I've read a 130hp two stroke will "process" approximately 325cfm. That's less than half of what K&N says 2 of their 6" pods should flow. Just throwing data out there.....I give zero fukkaroo's what anyone runs for air filters. Btw..I can see benefits in running a larger filter especially in dirty conditions. .more filter area "should" extend service intervals. Off of K&N's site 26. Should I install the largest K&N filter that will fit in my race vehicle? If an existing K&N filter is large enough to provide negligible restriction, a larger than required filter will not affect the amount of air an engine can take in, however, it will lengthen the filter's service interval. A longer service interval can be an important factor when racing in dusty, dirty environments. To each their own. obviously.. the larger filters dont hurt. Do what you want. Quote Link to comment Share on other sites More sharing options...
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