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Discussion Starter · #1 · (Edited)
i have been waiting/lurking before i do any other airbox mods and i ran across this video.


what do ya'll think of their findings. how can we use this info when coming up with futures intake mods?

mfc claims up to 20%. the testers guess 5 or 7%.

actual results when intake is inside hood with headlight still installed... NONE!
 

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Im sure this will turn in to a lengthy discussion thread but I open up the intake for more air CFM, not really for cooler air. More air volume, together with more exhaust volume does increase power that you can feel (though I have no dyno numbers) on a carburated mini. However I have not felt any performance increase on an air/exhaust mod on my EFI Grom.
 

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I was thinking about this the other day, riding the Grom. I don't think the mods I have done to the airbox have done anything at all, except to maybe help the bike breathe a little better. The only real way to get more power for our Groms is an increase in thrust. When the get the bugs worked out of these big bore kits, a 150 or 170 is what I would like to go to. :smile:
 

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Intake is just going to be one part of the puzzle. Pretty much every bike I have owned the the last couple of decades got a freer flowing exhaust and intake as fatter jets. They all ran better after those mods. I feel the Grom needs the same.
 

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Intake is just going to be one part of the puzzle. Pretty much every bike I have owned the the last couple of decades got a freer flowing exhaust and intake as fatter jets. They all ran better after those mods. I feel the Grom needs the same.
Right, but fatter "jets" will have to be adjusted by an ECU programmer. I an counting on my EJK to do that
 

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I think using other mods in conjunction with the cold air does make difference like other people here say. For volume purposes. Add a free-flowing exhaust and fuel, and you will definitely need more air coming in for the proper A/F ratio. A guy who runs a motorcycle tuning shop near me told me that an intake mod of any kind is useless on its own because the ecu can only compensate to some extent. It's best to accompany that with a free flowing exhaust and a programmer. So, I did so. But on my '09 Yamaha WR250X. Spent time and money on: Full exhaust, modified cold free flowing intake, remove emission components and installed an ecu programmer. What did I get after all that? Stock hp is 23 to 25 according to motorcycle magazines. I got 29.8whp. So, 20%ish, but with the mods combined....that's why I'm leaving my Grom alone. I do plan on going for some dyno pulls in the Grom to know my exact whp though.
 

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I agree,,I dont think an intake alone does much if anything.But add an intake exhaust and fuel,,,Huge improvement you can feel. Again as stated this has always been done with bigger jets with the grom it will have to be a injector and programmer..
 

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That video isnt that great I do intakes for a living and I can tell you they do make a difference. The filter is the biggest key factor as well
 

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Discussion Starter · #11 ·
That video isnt that great I do intakes for a living and I can tell you they do make a difference. The filter is the biggest key factor as well
I saw your video. Do you think you will be selling it? With the airbox removed, how do i protect it from rain?
 
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