K&n filter 502mpi 1996
03-16-2016, 12:15 AM
#11
Platinum Member
Platinum Member
iTrader: (1)
When i built my pontiac 462 efi for the 74 trans am a few years ago we were making 575 to 585 or so hp day to day, bolted on kn 3x9 on dyno and made like 537 or so, was 38 or 40 hp drop, put info up on po tiac forums and every guy that had one was mad at me. I was doing them a FAVOR!!
10-17-2016, 05:25 PM
#12
Registered
Join Date: May 2016
Posts: 209
Likes: 0
Received 0 Likes
on
0 Posts
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
10-18-2016, 09:03 AM
#13
Platinum Member
Platinum Member
iTrader: (1)
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.
10-19-2016, 11:03 AM
#15
Platinum Member
Platinum Member
iTrader: (1)
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
10-19-2016, 11:12 AM
#16
Registered
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
10-19-2016, 08:16 PM
#17
Registered
Join Date: Jan 2007
Location: Murrayville Georgia
Posts: 1,817
Likes: 0
Received 891 Likes
on
319 Posts
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.
10-19-2016, 09:49 PM
#18
Registered
iTrader: (1)
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.
10-19-2016, 09:54 PM
#19
Registered
iTrader: (1)
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://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.
Last edited by SB; 10-19-2016 at 09:58 PM.
10-19-2016, 10:04 PM
#20
Registered
Join Date: Jan 2007
Location: Murrayville Georgia
Posts: 1,817
Likes: 0
Received 891 Likes
on
319 Posts
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.
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.
