Well today was my first experience at running my car on a dyno. This is a lot more interesting and exciting than i thought.I went to a local shop that has an all wheel chassis dyno and for $50 i got three runs. First run was completely stock running thr car as i would when driving down the road (except for an open hood) I secretly was waiting to get about 100 or so hp ! Results:

139 peak hp at 3800 rpm
217 lb/ft at 3150 rpm

Higher than i had expected as i know these LG4's are 145 / 240 stock (measured at the flywheel no accessories etc.) Now for the second pull i removed the air filter lid only and ran it again.Results:

177 peak hp at 4150 rpm
249 lb/ft at 3100 rpm

Wow almost 40 hp from removing the lid alone was incredible I never could have thought that the stock air filter was that restrictive. So for the nest pull I put the lid back on but repositioned the air snorkle hose so that its drawing air from a more "airy" location just sitting on top of carbon canister Results:

150 peak hp at 3700 rpm
240 lb/ft at 3000 rpm

Down 27 from no lid but up 13 from the first run. Well i'm going to clean my K&N air filter and put together a dual snorkle system as detailed in the tech articles here.Also i noticed how rich i was running with the air cleaner on as oppsed to a very nice mixture with the lid off. I will post the dyno results as soon as i can scan and post them here. This is going to get expensive/fun as i change things and run the dyno pulls to verify the changes were positive or negative.

BTW I'm running the following: Rebuilt LG4 (20k miles or so) Performer intake stock q-jet ( with alittle bog still) Summit 11102 headers and flowtech 2 1/2 y-pipe to a flowmaster dual outlet out back (single pipe from y to muffler) as mentioned the k&n air filter fresh set of plugs old wires(replacing soon) stock ccc hei lots of other stuff but not really relavent to this topic. Stay on the look out for the dyno sheets!!!

 

AS promised here are the scans:
http://www.putfile.com/83-84z28

 

I'm a little shy on time here, but those dyno sheets show your A/F ratio across the band, which is awesome. I think your secondaries could use some tweaking judging by the funny curve the mixture takes. Take a close look at that and think about secondary rods, pump shot, and air valve tension. I'm sure you can optimize that a bit.

 

nice power curve

 

i hope you mean the first and second runs right? like i mentioned it was pretty incredible to see that much more power from removing the lid . I am going to check my air filter today when i get off work and see how clogged it is cause i thought it was ok when i checked it last month i'll post an answer as soon as i do.

 

Ok as i said earlier i went out and got a cleaming kit for my K&N filter cleaned it last night,let it dry and oiled it this morning. I took my air cleaner assembly and removed the littlte tab on the inside that directs/blocks the flow out of the snorkle and into the filter also removed the thermac valve completely and sanded and rattle canned the whole thing black. This afternoon i put the K&N flter on with the lid upside down so as to let a little more air into that housing till i get the dual intake done went out and drove it. IT FELL ON IT'S FACE.put the lid on as normal same thing removed the cleaner and did another drive wow full power no bog just go! and the rpm's climb much faster than before. After this i went to autozone and got two things a regular paper STP replacement filter and an Edelbrock 1002 air cleaner> first the STP replacement noticeable improvement over my K&N cleaned and oiled as per instructions and was worse flowing than the regular paper filter. Next i put on the Edelbrock 1002 had to get a slightly longer screw stud but easy 1 minute install otherwise, Test drive same power and responce as having no cleaner at all I know some will say that i'll pick up hot air from the engine with it but i only drive relatively short distances and it was only 21.99 so it will suffice till i do my dual setup.

 

http://store.summitracing.com/partde...5&autoview=sku

ahh! Triangle of death!

That's messed up that your K&N performed so badly. I have no idea what to say. I'd be very careful with that Edelbrock piece, they have a bad reputation (death eh?). I might call up K&N and ask them WTF? Maybe if you raise a stink you can send them your air cleaner and they can find out if it's fubar'd or something, and give you a new one. Don't they have a warantee of some kind? Most of what i've heard shows they are the best thing since sliced bread so i'd think they want to keep their reputation good.

 

whats wrong with that air cleaner does it collapse or something? I know that K&N makes excellent products as i have used them on other vehicles i've had it just seems the one that i got with my car when i bought it doesn't flow right.I'm not upset with the company or anything besides it doesn't seem to fit right i have to force it on to the housing for it to fit over the inside centering lip as oppsed to the paper filter that just slides right on no problem. Anyways let me know what the problem is on that Edelbrock as i can still return it if necessary

 

you can search on this board for Edelbrock air cleaner, or 1002, or just triangle of death, or foam air cleaner and see for yourself.

Yes, they have a tendancy to collapse, catch fire, and find their way into the engine to cause all kinds of havoc. Usually they flow really poorly as well - but I can't really argue with your results, since you have back to back results...

I'm a strong believer of the K&N, but there are some black sheep on this board that despise them. Maybe they can recommend an alternative. But IMHO i'd get K&N to make things right, you must have gotten a lemon or something.

 

so you are saying that the edelbrock air breathers are no good?i just bought one,so if there no good i an't running it

nvm i seen the pic sonix put up.yeah those triangle ones are junk i hear too

 

well last night i returned the air cleaner and got my money back no problems.I'm running the stock air cleaner and replacement filter no problems am currently putting together a dual snorkle as in the tech articles here. hope to have it done in a week or so will keep in touch

 

Rock on. Make sure you dyno it again after

 

When you re-oiled the K&N Filter, are you sure you didnt over oil the filter?

Kind of a dumb question, but you never know..

 

no i've oiled other k&n filters before just seems to be the wrong wrong for my veh.(wont fit tight and all) I will re-dyno it when i can i'm in the hunt for a 350 now(knew this would get fun/expensive after the first dyno pull)

 

When you put the stock lid upside down, there is not enough room between the top of the choke tower and lid for air to get through. I ran into the same problem when I tried it years ago. If you were to put a little bit taller filter element in, you'll be fine. Or just continue with the dual snorkle mod

 

ive already started cutting anf have the dual snorkle setup about 1/2 way to painting it i cut the snorkles short like the stock one to eliminate the small to large mouth on the hose end and also the heat riser hole on the bottom hopefully i can paint it by the weekend but i've come down with a nasty cold and its kicking my tail. O well i'll keep it up to date

 

Pretty much confirms my experience & positions regarding single snorkels and K&N's.

 

i have to agree with you because of this experiences

 

Well finished the dual air cleaner and i must say what a difference! Yes it looks pretty neat especially for home amde(pics coming sson). But the better difference is in the seat of the pants i feel a big change for the better .