rgrove, the example I'm using in my 56 tbird with a not so stock 312. The heads ported etc blue thunder intake pretty snappy cam, poked and stroked. Now with all this I thought the bird was doing real good, and it was. Then after watching my mustang buddies switching there original air filters over to K&N and out running chebbies alittle easier I didn't want my old tbird being left in the dust so switching over to a K&N the bird was running a little leaner which told me I was getting more air into this ole boy. Jetting up a few more rounds told the story with the seat of the pants feel of some extra ponies being unleashed and a smile put on my face  and it's still there if I can keep everything else together.

Asheville NC

-Gary Burnette-

 

Right, what did I say down? My mistake.

Were you using the stock air box, or duct, or whatever the sho used? Sometimes simply changing the filter will not yield any results. The system as a whole needs to be considered.


Lawrenceville, GA

My tests were on an original taurus SHO, that was built to make a lot more power than stock.....motor revved to 7k (IIRC), so i would have thought that a K&N would have made at least some difference, but nope.

Ron Grove

Wauconda, IL

I would think on a stock engine that does'nt need a lot of air and is restricted to how much air it could injest a K&N would not make any  difference. But on the other hand if the engine has been built up to the point that it can take in and use alot more air than a stock air filter can supply the K&N then comes into play. That's why there considered performance air filters.

Joey, if you get more air going thru the carb and you're running lean, you jet it up richer to balance out the air fuel ratio.

-Gary Burnette-

Here is a post.  In there you will see how I converted a pass oil bath to look stock but use a modern element...  Hope this helps.

http://www.y-blocksforever.com/forums/Topic30418-3-1.aspx

BTW, re: K&N, when I tested them on my DD at the dragstrip, I found NO performance difference in several back to back runs between K&N and regular paper element.  Ive always been skeptical of their performance claims since then, FWIW.

Ron Grove

Wauconda, IL

I guess that would depend if you're bordering on a lean A/F mix going in. The increased CFM of a high flow filter might result in having to go down a jet size.

Without seeing the air cleaner I can't say for sure.  I measured the inside diameter of the inner unit (the part with all of the fliter media inside.)  The K& N website has a cutom application section where you can choose by dimensions.  I simply found one that met the diameter and height requirements I needed.  As for doing the job, I found the procedures years ago on another forum.  It was pretty easy.  I cut around the bottom of the inner unit with a rotaty tool and pulled out the guts.  Dropped in the K&N and put it back together.  It fits together properly and the air simply enters through the gap between the inner and outer units and flows through the K&N before getting to the carb.  I guess if you wanted to use diagnostic equipment to check flow, you could experiment with how much of the inner unit to cut away exposing more of the filter to direct airflow.  However, I've done 3 of these and just cutting the bottom out has always worked well.  I only had to make very minor adjustments to the mixture screws on the carb. 

A.J.

South Jersey

SMSgt USAF Retired 
1955 Ford Ranch Wagon & a couple of old guitars...Life's Good!

John,



I was only referring to the F-Bird's large diameter intake hose & carb-top/box attachment, not the original type remote filter. If those parts are available as reasonably priced repos (?), I thought they might be especially well suited to rigging a cold-air intake system from the original T-Bird fresh air ducting. Would the F-Bird polished top fit another type carb I wonder, or only the teapot? It's also likely a modern generic-type K&N filter & box could be easily plumbed into the hose somewhere?

6 VOLTS/POS. GRD. NW INDIANA

I thought you couldn't modify these oil bath filters for modern air filters.  I think I remember a post here about it.  What steps did you do to make it work and did you add anything to it to make it work?

Mike