k&n question

well,i got my k&n in today,and put it on,it runs great,but when you turn it off,it makes a liitle pop,like air is coming back through the intake,any ideas on what this is,and how to fix it

Did you get the whole kit or just the filter?

it is the whole fipk kit

I would tend to think that the noise was aways there.  Now that you took the stock filter and tube off, you can hear it.
 
Just a guess, as I don't have an H3. But you wouldn't have done anything to cause that.

i know,maybe the box was covering it up

quote:

ORIGINAL: hilljob26

well,i got my k&n in today,and put it on,it runs great,but when you turn it off,it makes a liitle pop,like air is coming back through the intake,any ideas on what this is,and how to fix it

There's nothing wrong, it's normal, they all do it.

The POPPING sound is perfectly normal..vacuum releasing a diaphram.
 
Search "intake system POPs  H3" and you get http://www.hummerforums.com/m_67232/tm.htm
 
Amazing.  You can search the forum for answers.

i know,i know,i need to search more,but if i did that i wouldnt sound like a dumb azz at times

                 For everybody, search is a wonderful thing   Keep truckin hilljob, glad to have ya here!

well gosh darn it,im glad to be here.i think im gonna cry,my wife has never even told me she likes me here

so what's the HP gain on an H3 with Alpha engine (5.3L) with K&N filter (with or without the kit) over stock?

Also, which syntetic oil is best to be used? I think Hummer uses Mobil 1, like many auto manufacturers, but are there better one's for people living mild winter weather zones, such as MD, VA, DC, DE, NC? For example, Royal Purple? Royal Purple’s Max ATF, Max-Gear, and 10W30 synthetic motor oil supposedly adds 10 hp and 12 lb-ft of torque to trucks (such as 96 Chevy used as an example on their website - http://www.royalpurple.com/sport_truck/sport_truck.html ).

According to rought estimates based on reviewing all this marketing info, an H3 Alpha might gain smth like 20hp while at the same time extending its reliability and prolonging the time between scheduled maintenance (from about 3,000 miles to 6,000).

well,im guessing the alpha will be like the checy trucks seems how it is the same engine,and the one on my 04 has huge gains,im guessing 20%,as far as oil,i like castrol synthetic blend,its better the conventioonal,but not as pricey as full synthetic,although,if you can afford the royal purple,that is by far the best IMO

Amsoil is the best synthetic oil made.