fram filter replacement

I am really sick of that uni POS foam filter, what is the number for the fram replacement filter?

I sent an email to tiger to get him to join up. He did a whole writeup about using a fram filter so hopefully he will see it and post.

Welcome aboard!

David

thanks. Its just that that damn uni is passing so much freaking dirt, and i even had my work checked to make sure it is properly installed/oiled by the shop D:<

Uh oh... I better check mine. I'm running a uni.

David

found this and it made me reconsider k&n /uni if i had a racing engine that I didn't mind rebuilding every season i might not mind the rebores, but not on MY vision.
http://duramax-diesel.com/spicer/index.htm

Good info...kinda scary too. Looks like the Uni is good at stopping leaves, branches and small critters.

David

The fram filter is number - Fram CA3903. I couldn't find that particular fram part, but pep boys found a similar part from another manafacturer.

From what I remember, you cut the base off the stock filter and I glued the fram on the old base plate upside down - so the plastic ring around the top of the fram was glued to the base plate of the stock filter. Don't remember what I used for glue, silicon of some sort I think in generous amounts and it has worked well so far. I can take a picture of it at some point and post, if you're interested...

Fram CA3903 seems right... If you have the filter with the plastic base just tear the filter away from the base and discard the upper portion. Clean the base with solvent and add a bead of Red RTV silicone, sit the filter onto the base and add a weight of some sorts (e.g. a book) and leave over night to set up. Install and away you go...

TIGER

just to be sure, we are using the filter in the correct direction, so that it is no filtering backwards right?

It's just a paper element... so airflow direction really shouldn't matter /shrug

it matters in this application. the pleats work much better one way than the other.

Its the first problem I've heard about, with the Uni, I've been using one since 1999 and have had no problem. It is getting old though, too many cleanings.

want mine?

I have a couple of spares , but their pretty old too. Sure I can use it.

cool. just let me run down to tap plastics, and pick up a piece of lexan stock for the bottom of my new filter, aka, I will send it your way after I have built it.

Been doing the Fram setup up for many years. When using the Fram, be sure that it doesn't interfer with the rod that runs between the vacume pot and the air box flapper. Fix is to simply bend over the filter pleats that touch the rod. No big deal at all.

lol. Vac. pot? whats that? I am running the early 82 air box.

Probably are. The "updated" 82 carbs have a vacuum assist that goes to a kind of actuator inside the airbox - which is also part of the modification.

David

i chose not to get the "update" i prefer the old box, i like the way it responds better, i just ride around the flat spot.

What vehicle was the Fram filter originally designed for?

did some hunting on the fram filter, here is the cross reference data I found.
http://www.power-21.com/FramPower21i/PartDetail.aspx?b=F&pn=CA3903