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busey Samba Member
Joined: October 19, 2016 Posts: 420 Location: Sun City Arizona
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Posted: Sat Dec 28, 2019 7:15 pm Post subject: Foam filter sputter |
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Finally had my 48 IDA powered 2275 running smooth until i decided to add Jaycee foam stack filters today. Idle is smooth, BUT sputters upon acceleration on thru the mid-range, and will smooth out again when i pedal to the metal it. I take the filters off and it runs smooth again
H - E_ L - P !
I could just run without air filters but Phoenix Arizona is so damn dusty and rocky that i worry some crap will make its way in the motor thru the stacks. _________________ No turning back now, "Its Blow thru or No thru" baby! |
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sled Samba Member
Joined: February 16, 2005 Posts: 6179
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Posted: Sat Dec 28, 2019 7:39 pm Post subject: Re: Foam filter sputter |
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stack filters are known to be quite restrictive, which is probably changing your jetting. The best situation is to run full size filter elements around the velocity stacks. _________________ drive your split. |
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Glenn Mr. 010
Joined: December 25, 2001 Posts: 76938 Location: Sneaking up behind you
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Posted: Sat Dec 28, 2019 7:42 pm Post subject: Re: Foam filter sputter |
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_________________ Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
"You may not get what you pay for, but you always pay for what you get"
Member #1009
#BlueSquare |
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busey Samba Member
Joined: October 19, 2016 Posts: 420 Location: Sun City Arizona
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Posted: Sat Dec 28, 2019 7:51 pm Post subject: Re: Foam filter sputter |
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sled wrote: |
stack filters are known to be quite restrictive, which is probably changing your jetting. The best situation is to run full size filter elements around the velocity stacks. |
That does remind me that a few years ago there were some air filters on the market that were not of the foam variety but more like regular air filters that ran individually off the stacks at abit of an angle. _________________ No turning back now, "Its Blow thru or No thru" baby! |
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busey Samba Member
Joined: October 19, 2016 Posts: 420 Location: Sun City Arizona
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Posted: Sat Dec 28, 2019 7:54 pm Post subject: Re: Foam filter sputter |
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Those look like foam as well. Are those restrictive to the point that they throw off your jetting? _________________ No turning back now, "Its Blow thru or No thru" baby! |
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Glenn Mr. 010
Joined: December 25, 2001 Posts: 76938 Location: Sneaking up behind you
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busey Samba Member
Joined: October 19, 2016 Posts: 420 Location: Sun City Arizona
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Posted: Sat Dec 28, 2019 8:24 pm Post subject: Re: Foam filter sputter |
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That might just be the fix! Thanks _________________ No turning back now, "Its Blow thru or No thru" baby! |
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oprn Samba Member
Joined: November 13, 2016 Posts: 12731 Location: Western Canada
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Posted: Sat Dec 28, 2019 9:16 pm Post subject: Re: Foam filter sputter |
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Perhaps not all Webers are like this but my Webers take air in for the idle circuit from between the stacks. The idle jets would quickly plug with road dust using those filters. |
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HBRag Samba Member
Joined: April 29, 2005 Posts: 735 Location: Huntington Beach, CA
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Posted: Sat Dec 28, 2019 10:00 pm Post subject: Re: Foam filter sputter |
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Restrictive or not, the AFR will change with and without filters. I have the traditional CB style filters, and the AFR goes lean without them. I’d expect to have to re-jet with them on. Do you have an AFR meter? |
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busey Samba Member
Joined: October 19, 2016 Posts: 420 Location: Sun City Arizona
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Posted: Sun Dec 29, 2019 8:43 am Post subject: Re: Foam filter sputter |
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HBRag wrote: |
Restrictive or not, the AFR will change with and without filters. I have the traditional CB style filters, and the AFR goes lean without them. I’d expect to have to re-jet with them on. Do you have an AFR meter? |
I Don't, but i have read that Aircooled.net rents them out. So that will be the next tweak to make with filters On, since the motor is just about broken-in and got her to run consistently smooth thruout the power band w/filters Off AND even without a 3rd progression hole _________________ No turning back now, "Its Blow thru or No thru" baby! |
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67rustavenger Samba Member
Joined: February 24, 2015 Posts: 9770 Location: Oregon
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Posted: Sun Dec 29, 2019 9:03 am Post subject: Re: Foam filter sputter |
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busey wrote: |
HBRag wrote: |
Restrictive or not, the AFR will change with and without filters. I have the traditional CB style filters, and the AFR goes lean without them. I’d expect to have to re-jet with them on. Do you have an AFR meter? |
I Don't, but i have read that Aircooled.net rents them out. So that will be the next tweak to make with filters On, since the motor is just about broken-in and got her to run consistently smooth thruout the power band w/filters Off AND even without a 3rd progression hole |
ACN does not rent that tool any longer. _________________ I have learned over the years.
Cheap parts are gonna disappoint you.
Buy Once, Cry Once!
There's never enough time to do it right the first time. But there's always enough time to do it thrice.
GFY's Xevin and VW_Jimbo! |
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busey Samba Member
Joined: October 19, 2016 Posts: 420 Location: Sun City Arizona
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Posted: Sun Dec 29, 2019 9:57 am Post subject: Re: Foam filter sputter |
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67rustavenger wrote: |
busey wrote: |
HBRag wrote: |
Restrictive or not, the AFR will change with and without filters. I have the traditional CB style filters, and the AFR goes lean without them. I’d expect to have to re-jet with them on. Do you have an AFR meter? |
I Don't, but i have read that Aircooled.net rents them out. So that will be the next tweak to make with filters On, since the motor is just about broken-in and got her to run consistently smooth thruout the power band w/filters Off AND even without a 3rd progression hole |
ACN does not rent that tool any longer. |
Ah Damn! Thanks for the heads up. _________________ No turning back now, "Its Blow thru or No thru" baby! |
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jeffrey8164 Samba Member
Joined: January 06, 2018 Posts: 3818 Location: Georgia
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Posted: Sun Dec 29, 2019 10:41 am Post subject: Re: Foam filter sputter |
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They don’t rent them anymore because they are relatively inexpensive now.
Sub $200.00 _________________ Volkswagen!
Turning owners into mechanics since 1938.
“Let he that is without oil throw the first rod”
(Compression 8.7:1) |
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RailBoy Samba Member
Joined: March 10, 2008 Posts: 2904 Location: Virginia
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Posted: Sun Dec 29, 2019 2:47 pm Post subject: Re: Foam filter sputter |
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None Oiling and Synthetic I do Believe, R2C's..... Been running mine now for 4,250 Miles......
http://www.r2cperformance.com
RB _________________ [quote="smitty24"]"HELP, I ported my own heads and now have fire coming out my ass" .[/quote]
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UK Luke 72 Samba Member
Joined: September 07, 2011 Posts: 2867 Location: Little Britain
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RailBoy Samba Member
Joined: March 10, 2008 Posts: 2904 Location: Virginia
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Posted: Sun Dec 29, 2019 3:43 pm Post subject: Re: Foam filter sputter |
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Yea, I think so as well.... It is a street car so can't be so bad with dust and all...
If I do blow them out, it would be from the inside out of course with just lightly canned air...
But they have not come off and cleaned yet, knock on wood, lol..
Kinda a test... RB _________________ [quote="smitty24"]"HELP, I ported my own heads and now have fire coming out my ass" .[/quote]
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busey Samba Member
Joined: October 19, 2016 Posts: 420 Location: Sun City Arizona
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Posted: Sun Dec 29, 2019 5:51 pm Post subject: Re: Foam filter sputter |
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Question, rarely are 48 IDAs equipped with any kind of filtering even on the street. Can't be that bad to run them as they have been for many many decades, ie w/OUT filters??? _________________ No turning back now, "Its Blow thru or No thru" baby! |
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66brm Samba Member
Joined: January 25, 2010 Posts: 3676 Location: Perth Western Australia
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Posted: Sun Dec 29, 2019 5:54 pm Post subject: Re: Foam filter sputter |
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I would never run an engine on the street without filters, track and dyno are different _________________ Aust. RHD 66 Type 1
Aust. RHD 57 Type 1 Oval
modok wrote: |
I am an expert at fitting things in holes, been doing it a long time |
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67 Sunroof Samba Member
Joined: February 22, 2014 Posts: 1836 Location: Salisbury, MD
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Posted: Sun Dec 29, 2019 7:43 pm Post subject: Re: Foam filter sputter |
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Man, GREAT idea with the springs holding the wingnuts on the air filters! I’m gonna do that to mine as well. Motor looks great man! Glad it is still running great for ya!
RailBoy wrote: |
Yea, I think so as well.... It is a street car so can't be so bad with dust and all...
If I do blow them out, it would be from the inside out of course with just lightly canned air...
But they have not come off and cleaned yet, knock on wood, lol..
Kinda a test... RB |
_________________ 1776cc, CB crank, CB 2241 cam, CB light lifters, CB H-beam rods, CB light flywheel, Mahle forged pistons, A1 Sidewinder exhaust, Dellorto drla 40’s, Hoover modded case, fully balanced, fully flowed, heads by www.type-emotorsports.com, Air ride suspension by https://www.airkewld.com/?Click=3989 |
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RailBoy Samba Member
Joined: March 10, 2008 Posts: 2904 Location: Virginia
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Posted: Mon Dec 30, 2019 5:02 am Post subject: Re: Foam filter sputter |
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Thanks Roof, yea be careful drilling, I used both a hand held drill for two of the holes before I remembered I had a drill press at the location I was at doing it, both ways you could see the bit flexing, but did not break it during the drilling, vey small bit.. lol... RB _________________ [quote="smitty24"]"HELP, I ported my own heads and now have fire coming out my ass" .[/quote]
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