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Air cleaners for triple su set up

Started by fenz , Sep 25 2012 09:14 PM

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#1 fenz

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Posted 25 September 2012 - 09:14 PM

What are peoples thoughts regarding air cleaner elements for SU carbs??

The set that i am about to recondition have the ram flow style dome elements however the foam is about knackered and one of the plastic cages that sits under the element is missing.

I am about to order the rebuild kits from Midel and noticed that they sell the foam replacement elements ($14 each i think)

Are these style of air filters worth while doing anything with?? (power loss, filtering capabilities etc)

#2 _Bomber Watson_

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Posted 25 September 2012 - 09:23 PM

Foam isnt that great from what i gather, i have foam socks on mine purely because, well, i have them.

I would think socks on trumpets woudl work a little better than those dome ones, but im toying with the idea of cutting and glueing a truck air filter together, about 4" deep and one continuous thing in going around all the SU's, with backing plate over the trumpets and a front cover plate, if that makes sense, picture a big ass oval around all the carbs.

Cheers.

#3 fenz

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Posted 25 September 2012 - 09:55 PM

Yep i saw a post on hear the other day with that sort of set up.
Thinking that individual socks or dome elements are gonna be fairly restrictive once you oil them.

K&N do some nice stuff and most probably make something that you could adapt to one large filter set up.

Some one would have dyno results with different types of filters i would think.
Will be going onto a road going car so some sort of filtration will have to be used.

#4 hanra

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Posted 26 September 2012 - 06:42 AM

I run the Ramflo style cage but the foam in them is just crap. I changed to a Finer Filter insert with some air filter oil as well. I simply don't have room for much else.

I also run a stub stack on each carb inlet underneath the air filter. Just fits in there!

Edited by hanra, 26 September 2012 - 06:44 AM.

#5 warrenm

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Posted 26 September 2012 - 07:28 AM

I run UNI-FILTER foam socks on the "trumpets" of my SU's & have run the car with & without them on the strip with no change in times or speed.

#6 orangeLJ

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Posted 26 September 2012 - 07:43 AM

Not su's, but putting foam uni filters on the weber trumpets makes the thing run like balls.

That said, it was tuned wthout them.

I ran little round individual k&n aircleaners on my su's, now on the strommys ik n the xu1.

might be worth looking at the unifilter "sheets" to make what your after bomber.

We used to use sheets and blocks to make the foam acleaner for the v8 dirt modified and the srintcars

#7 hanra

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Posted 26 September 2012 - 07:59 AM

Actually now that I look into it more, it was a Uni Filter that I used.

http://www.uniflow.c...en-us/d141.html


#8 _sunburst73-xu1_

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Posted 26 September 2012 - 10:48 AM

is there any type of Trumpets available for 2 inch SU's anywhere?

#9 hanra

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Posted 26 September 2012 - 12:56 PM

Uni Filter only list them up 1 3/4in.

#10 _stretchlc_

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Posted 26 September 2012 - 01:42 PM

Clarks Rubber sell the foam replacement in the form of a sheet , that you can then inturn cut to replace the old foam!...its not cheap stuff, but you dont need a great deal to make up 3 new filters for the Ram Flo's

#11 _sunburst73-xu1_

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Posted 26 September 2012 - 01:53 PM

Thinking about custom making some Trumpets and a inlet manifold for the set of 3 I have.

#12 _Bomber Watson_

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Posted 26 September 2012 - 06:10 PM

Not su's, but putting foam uni filters on the weber trumpets makes the thing run like balls.

That said, it was tuned wthout them.

I ran little round individual k&n aircleaners on my su's, now on the strommys ik n the xu1.

might be worth looking at the unifilter "sheets" to make what your after bomber.

We used to use sheets and blocks to make the foam acleaner for the v8 dirt modified and the srintcars


I've used that stuff to make air cleaners for sports bikes before, still have a little laying around, as well as the propper oil....

BUT, at the end of the day, i prefer paper.

Cheers.

#13 _STRAIGHTLINEMICK_

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Posted 26 September 2012 - 07:37 PM

is there any type of Trumpets available for 2 inch SU's anywhere?

I think Midel have some long trumpets left,I need short trumpets to clear the inner fender so i had to order some from England,Still waiting on them.At the moment i'm using the lynx ram flow filters without oil in the foam to keep the birds out ,they ritchen the a/f ratio by about .5.

#14 _CraigA_

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Posted 26 September 2012 - 08:45 PM

Pierce Manifolds have a range of trumpets and filters. Aussie dollar is good against USD and their service is helpful and fast.

www.piercemanifolds.com

If I use foam filters on my Webers they run too fat as with Micks SU'S.

#15 _oldjohnno_

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Posted 26 September 2012 - 08:59 PM

Oiled cotton mightn't be the best for filtration but at least it flows reasonably well. Paper needs a lot of area for really good flow but it is the best for filtration. But foam is truly remarkable in that not only is it really really awful at filtration, but as Mick and Craig have pointed out it flows quite poorly as well. I think foam is something that you'd only use if nothing else would fit, and with SU's there's usually not a lot of room, especially around the rear carb.

#16 warrenm

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Posted 27 September 2012 - 08:30 AM

I got my trumpets from http://www.jntperformance.com.au/ then made my own base to attach to the carb.
As has been already mentioned the foam are not the best at filtering, but they fit & my car is no longer a daily driver & I didn't want to try & fit a box on the carbs with 3" trumpets inside.

#17 _STRAIGHTLINEMICK_

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Posted 27 September 2012 - 07:08 PM

I attended an engine building course about 15 years ago run by a bloke named David Vizard ,some of you might know of him,he is a guru with english and american engines, tuning and developing performance parts, anyway he showed the test results from k&n cotton elements compared with paper and foam,the cotton element far outflowed the others even when filthy.So if you can fit cotton element filters then i think that is the way to go. You can use K&N or I should be able to supply a lower cost redline brand element which is of similsr quality.

#18 fenz

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Posted 27 September 2012 - 07:18 PM

Think i might look into the K&N thing as i have used their stuff on my bikes in the past and seems to work quite well.

#19 hanra

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Posted 27 September 2012 - 07:35 PM

I attended an engine building course about 15 years ago run by a bloke named David Vizard ,some of you might know of him,he is a guru with english and american engines,


Yep, got a few of his books.

#20 _STRAIGHTLINEMICK_

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Posted 28 September 2012 - 01:24 PM

Yep, got a few of his books.

Yep me too, he enjoy's his work.Any bloke that likes the floor to shake underneath his dyno has my respect.

#21 Dave6179

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Posted 01 October 2012 - 08:26 AM

I had ramtubes made from zorst tube, with a flare one end, and I welded the plate on the other same as the carb, used Uni Filter socks that only lasted 3 years. They had a 3" id with springs, but they didn't work if they were hard down (inside) on the tubes, had to have clearance. I've just put my old airbox back on, with a K&N filter. I made it way back in 1990. Still needs a paintjob too.Attached File  DSC02932.JPG   142.87K   9 downloads

#22 _Bomber Watson_

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Posted 01 October 2012 - 10:57 AM

Something like that is the other thing i considered, but without the filter at the front, that lift off pannel you hve there, the red bit, replace that with paper elements, find something that fits, stock vs commy x3 or something like that?

#23 Dave6179

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Posted 18 October 2012 - 07:18 AM

What about something like a 260Z unit? Some performance ones on the interweb.

#24 _Bomber Watson_

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Posted 18 October 2012 - 08:39 PM

Good idea, a bit to short though. Might work on a Redline manifold where the carbs come together?

Two cut and shut would be pretty ideal i think.

I will keep them in mind, thanks.

Cheers.

#25 Dave6179

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Posted 19 October 2012 - 07:08 AM

http://www.summitrac...rts/KNN-E-1960/, try this one. There's a few that could be ideal... with custom mountings.

Edited by Dave6179, 19 October 2012 - 07:14 AM.

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