i did this after i put the 38r on my truck i wanted to let it breath as easily as possible. with the 6637 it would suck the minder to 100% at 30psi, so i then tried a k&n it still did the same ... so i added the y and with the wix and k&n it droped to 75% at wot wich is 36-38psi. so i then changed to the matching amsiol filters with equal restrictions and at wot it will barely move the minder maybe 10%.
hmmm so chances are just a single 6637 with a 38R and some smaller sticks like you have will not be enough air? Sounds like the filter is to restricted.
If hp is your only measuring stick than I guess that is enough for you to go on.
I'm certain that you could make 500hp on a stock airbox/ filter given enough compounding.
I'm 100% certain that my truck ran a lot better even at light throttle positions once I went to two air filters. It spooled up quicker, smoked less, had more boost for the same throttle position, and up top I gained significant boost.
The trouble with your set up is that it draws hot air from under the hood. I think the rule of thumb for temp into the intake is 1% drop in HP for every 10 degrees of air temp above ambient air.
There is no doubt that the extra filter should be helping the airflow to the turbo, but you got another 20 to 30 hp with colder or cooler air.
If hp is your only measuring stick than I guess that is enough for you to go on.
I'm certain that you could make 500hp on a stock airbox/ filter given enough compounding.
I'm 100% certain that my truck ran a lot better even at light throttle positions once I went to two air filters. It spooled up quicker, smoked less, had more boost for the same throttle position, and up top I gained significant boost.
The trouble with your set up is that it draws hot air from under the hood. I think the rule of thumb for temp into the intake is 1% drop in HP for every 10 degrees of air temp above ambient air.
There is no doubt that the extra filter should be helping the airflow to the turbo, but you got another 20 to 30 hp with colder or cooler air.
"that is only at an idle, within a few seconds at cruising speeds the under hood temps are only a couple dagrees above ambient air temps"...
I think that is wishful thinking. Unless you have some alternate way to put cooler air in there, the radiator is feeding temps of 140 to 190 degrees up into your intake system.
with a snap-on scanner it shows most of the engines perameters and one of those are air intake temps...... i watched the temp drop as i went down the road and if you do a search on here you'll find all sorts of posts on this TARM is one of the guys that has proven this i balieve, or can elaborate on it further
I tried the 6637 route, the biggie that shot that down was my local crackhead napa store wanted 80 bucks for the filter...that and it looks like it fell off a shop vac.
So I tried a single filter with a 3" pvc pipe (4" outside diameter) one trip around the block and even my bone stock truck sucked the minder down. Now the tabs were shot on my stock box and the pvc pipe no worky so I scavenged my shop for ideas.
Dust collector ransacked new filter added no problems, even with a shopping bag around one filter it won't set the minder, so I am thinking it was the pvc pipe.
But now I know I have plenty of filtering area.
I'm running 5" piping from the filter to the turbo, and the S&B R1264 is what I have been using for the past year. It's a little bigger than that AFE, and it's the biggest S&B makes for a 5" outlet. The pleats in it are pretty deep too, close to 2".
most of the filters will prolly do the job but why not make it close as possible to 0% restricted.... that is the only reason i did it... cause i could
Yep, I remember that! On a side note looking at the intake, if you are running a dual alt radiator top hose this won't work....not throwin stones, just sayin.
i am just using specters for right now, no signs of excessive dust....well on the inside, outside gets some cleaning every now and then. but they are cleanable and seem to do the job.
afe and s&b look like good filters if you have time to order them.
i was in a pinch so they turned out to be what i call temporary permanent.
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