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Originally Posted by SB
(Post 4416364)
Maybe we should just use surgical cotton...for....wait...surgery. LOL.
Remember my test on the 9x4 K&N FA on the small block carb mid 300hp years back ? Almost 2mph. Same hr, many runs with vs without, back to back...same section of lake. |
Originally Posted by articfriends
(Post 4416349)
Absolutely DO NOT WASTE YOUR MONEY. I have EXTENSIVELY dynoed a slightly modified 502 mpi the past 2 months, the ugly gen V style/mefi 1/ and 2 454/502 by far outflowed ANY upgraded air cleaner on the market. The hardin kn with square to round adapter killed 30-40 hp on a 540 hp 502, even the vortech engineering/AZSM etc giant billet rectangle version did not come close to the stock early one (with 2 dimples in the cover). You have by far the best factory flame arrestor, even a HP500 efi kn element killed 20 hp over the stock one in my testing, fwiw, Smitty
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1 Attachment(s)
Keep in mind this was a slightly built 502 w manifold work, bored out throttle body, 500 efi cam, I never tested a bone stock 502, its possible at that low of a hp level it will make zero difference as there might be other things more restrictive.
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75.5mph GPS with stock, 15 minutes later, 75.5mph GPS with K&N. No harm or help..
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Originally Posted by Pismo10
(Post 4492635)
75.5mph GPS with stock, 15 minutes later, 75.5mph GPS with K&N. No harm or help..
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Originally Posted by articfriends
(Post 4492801)
IF. your touching rev limiter stock w current propping OR motor has other things that are the restriction then air cleaner will make no difference, the aluminum adapter for the clamp on kn was so restrictive and hurt air flow so bad on my modded 502 that it drove it 90% into the 90 map table, fwiw, Smitty
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I recall an article years ago where they tested a lot of air cleaners from stock paper to the "best" K&N and others. all were the same size so the only difference was the brand and material. the best one for horsepower was the cheap paper filters, everything else started reducing power.
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Originally Posted by compedgemarine
(Post 4492961)
I recall an article years ago where they tested a lot of air cleaners from stock paper to the "best" K&N and others. all were the same size so the only difference was the brand and material. the best one for horsepower was the cheap paper filters, everything else started reducing power.
Metal flame arrestors don't swell when wet. Speaking of which, have you guys seen my picture of shrinking K&N elements ? Yup, the cotton shrinks. Not hearsey - the photo I put up on OSO is one I have here, and I hve seen this a handful of times. |
Here, I found the thread I started on this.
http://www.offshoreonly.com/forums/g...-w-photos.html Not shown on pics is comparison of height vs a new one. About 3/8" in height too. Doh ! This is the K&N 9x4.5" flame arrestor (#59-3364) , which has a 2 3/4" element height. http://i230.photobucket.com/albums/e.../DSCN21861.jpg http://i230.photobucket.com/albums/e.../DSCN21871.jpg |
Originally Posted by SB
(Post 4492985)
There is always more to it. A very clean, good paper filter does flow tons of air.....until it get's wet. Humidity and paper don't mix. Another place where a dyno doesn't show real life.
Metal flame arrestors don't swell when wet. Speaking of which, have you guys seen my picture of shrinking K&N elements ? Yup, the cotton shrinks. Not hearsey - the photo I put up on OSO is one I have here, and I hve seen this a handful of times. |
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