abarlas

How good are these air filters and adapters for the RX-7 from ebay.

http://cgi.ebay.com/ebaymotors/ws/eB...tem=2432103538

I was thinking about buying one.

wpgrexx

works just fine. just try and feed it as much cool air as possible

Flobb

the filters aren't normally that great, ususally paper instead of cloth. But the adapter is the important piece. You can buy the same filters at some place like autozone for $10. I would just replace the filter maybe as frequent as you would a normal one. Or when you go to replace it the first time, spend the extra money on a K&N which you can clean and reuse.

V8kilr

for $13 what could you possible expect?

and if it works better then stock its well worth the $13 imo

bingoboy

careful with the cheapo cone filters. one forum member had one come apart and a metal piece of it jammed his throttle body open causing quite a problem for him while driving.

you may also want to find an adapter that closely fits the hole in the afm. and has nice smoothe transitions in it. there are better quality ones around than in that link.

Kai

First off, I use an ebay filter and adapter, it works fine.

The port match between the cheap adapter plates and the AFM is usually very poor, but nothing that five minutes with a dremel tool won't fix. The adapter plate alone is usually worth the cost.

RETed

Anyone want nice cast units for a little more money?

http://rx7cz.net/shop/



-Ted

1987RX7guy

iTrader: (3)

The cheap ebay adapters are not great at all.

ALthough you can port match them to the AFM opening you can't smooth it out like the HKS one or those that REted has posted which HIGGi makes I beleive. They are 30 dollars for cast aluminum to anywhere shipped. Its worth it IMO the cheap ebay stuff it universal crap not made for our car's specific AFM opening. The filters are worthless also.

Evil Aviator

I don't know about the filter, but that seems pretty cheap to be of good quality. As for the adapter, the sharp transition from round to square is bad juju. See that lip that the air has to hit as it gets squeezed through the square hole? Not good.

This is better. It has a slight triangular crease, but that won't matter a whole lot.
http://rx7cz.net/shop/

This is also better.
http://66.216.67.51/product.asp?0=214&1=319&3=553

kitchen

I ordered an ebay filter + adapter. It showed the metal adapter in the ad. I got a plastic adapter, but it had a smooth transition.

Works for me.

Aaron Cake

iTrader: (1)

Explain how you can't smooth it out...

Also, several Audi's and BMWs use a simlar AFM, and you can often find the correct adapter at the wreckers...

Ezekiel702

I found a K&N filter and adapter off Ebay for liek 20 bucks... worked for me.

minclo

I want one!

and i have one of the cheapo filters from autozone, it works just fine...just needed a 3" to 2" adapter from home depot

Chimeron

But what about the air pump (I guess) intake, it's hooked into the filter box as well. Do these adapters have a port for that.

minclo

you can also get what's called a breather filter from autozone...bout 3 bucks, fits onto the airpump perfectly

5 point whoa

geez, that seems like a good deal to me, I'd get it if I were u

1987RX7guy

iTrader: (3)

NOTE-Please excuse My horrible grammer and sentence structure. Also the "*" is used in the following explenation as the DEGREE symbold for I do not know how to get it to show up. Also forgive the scale and crudness of the illustrations. They are for explination purposes only. I hope the original poster and all the other supporters of ebay adaptors understand why they are not worth the trouble.


Ok the top part of the picture shows the intake from inside the AFM. The grey would be part of the AFM itself(it shown with the blue arrows pointing to it in the pic) while the black areas would be the adapter metal which is restricting the flow a bit(shown here with the red arrows pointing to it).(Remember this is from the inside of the intake so the black parts are essentially making the intake opening smaller than the AFM"s opening this is our first hurdle with this cheap POS) THIS YOU CAN dremmel out to be the same size of the AFM opening. FINE everone knows that.

Second part of the pic- The lower illustration is a cut-out of the AFM adapter itself on the AFM stood up vertical. AFM adapter is in black. The grey along the inside of the black adapter is the AFM part of the metal. I have made this part with two sides. One illustrating the cheap EBAY ghetto adapters and the other the HKS or cast ones from HIGGI which are far supperior to ebay POS's. Anyhow on the right side you see the wall of the adapter going straigh down(please note again that this is just a mock up and not to scale or 100% accurate so please no jokes about crudness) Now the wall of the adaptor comes to a 90* angle with the bottom of it where it mates to the AFM. This makes the air take a 90* turn then another 90* turn to finally go into the AFM intself. The air's path is illustrated here with blue arrows and wavy lines for "turbulence". On the left side of our cut-out we see I have implemented a molding or ramp if you will. This is very similar to the ramps or inserts used in our N/a's auxilary port sleeves to curve the airs path to make it a "smooth" transition to the square opening of the AFM from the circular one of the adapter/filter. Both the HKS and the ones cast by HIGGI have these moldings on the side walls of the adaptor. Please note that the Pinaple Racing sleeve inserts have a bit of a flaw in design as we have seen the disastrous results with various pictures. They will come loose if they are not properly placed in their spots. Now I don't think you want a 13 dollar POS AFM adapter to ruin your 1k dollar engine do you? I don't think anyone would be stupid enough to try and smooth the sides out with epoxy or JB weld. It is too much of a risk on our engines to make it work the 17 dollars you save by by not having one shipped by our comrade HIGGI which will not kill your doritos These moldings/ramps allow the air to traverse the intake at a faster rate and with less un-needed turbulence. (BTW the ramp/molding is illustrated in Red and its air plow is also illustraded by red arrows.)


In conclusion I hope you all didn't get bored by my long post and I hope you Aaron Cake see why I posted why I posted. I don't appreciate being told I am wrong when I am indeed right. Although it is your right to have your oppinion and view please think things through.(The irony of it all I know. hahaha) My answer still stands it is not worth the trouble of cutting smothing and epoxying or JIing which would cost about the same as an HKS or HIGGI's adapter. You don't want to make them smooth with epoxy because you don't want to rely on epoxy or JB to hold for 30k or 50k or even 300k miles. Its just pointless and you probably will end up with a greater loss than saving.



Santiago