Air filter for IMPCO LPG carby - Aussie V8 | Holden - Ford

WB5LTR · 12-03-2007, 07:34 PM

Hi fellas. Im just wondering if anyone knows if there are different syle air filter setups that can be used on IMPCO 425 carbs. Ive got one on 308 and the air filter is a small round but thick thing. See pic. Just want to know if there are any other options out there. VAN454 i thought you might know as you've played with IMPCO carbs before on your big block.
Cheers

[/IMG]

epitaph · 13-03-2007, 08:37 AM

ive just got a normal k&n filter on mine lol

WB5LTR · 13-03-2007, 04:25 PM

lol epitaph ive hered you can do that. Looks like S**t???

VAN454 · 13-03-2007, 05:01 PM

Any filter made for a holley, it will need to be 3inch thick at least

WB5LTR · 13-03-2007, 05:11 PM

what do you run on yours van??

VAN454 · 13-03-2007, 05:22 PM

I have a custom setup(it's not much to look at

) because I am running twin mixers. Mine is an oval filter element from a GQ Nissan Patrol with sheet metal base and lid. Just go and buy a 14inch chrome filter with the tallest element you can fit under your bonnet (or through if you like) That's what I ran when I had the 308 with a single 425 in the van.

400HPONLPG · 15-03-2007, 01:51 AM

Best air filter for LPG Ive found on the Dyno, was standard 14 :inch round with a 50 /75 or 100 mm Unifilter oiled foam but be careful of all air filters as your old impco mixer things are pretty sensitive to getting a restriction signal to operate the converter.Sometimes thats why those little air filters work well with negative idle systems.

WB5LTR · 01-04-2007, 10:44 PM

just a bit of an update. I got a 14" round chrome air cleaner off ebay for 30 bucks. Managed to squeeze a 4" element under the hood with no mods.

@400HP what are those oiled uni's worth??

400HPONLPG · 06-04-2007, 05:52 PM

Just go to unifilters site and look for a distributor in your area, I think I used coventry's

400HPONLPG · 06-04-2007, 05:58 PM

Around $60 including Oil from Coventry's
Being a newbie,How do you include a picture in these posts ?

WB5LTR · 07-04-2007, 07:13 PM

Hi 400, i went to the uni filter site and it said 80-odd bucks. A price hick maybe??
I hadtrouble with pics too. You have to have the pics online some where. I used photobucket.com. Then you use the insert URL icon and paste the address of where your pic is. It took me a while to nut it out. You'll get there

bluev8vl · 12-04-2007, 09:56 PM

yeah ive got a 14inch on my gas carb on of the chrome ones u buy from autobarn.

400HPONLPG · 13-04-2007, 11:17 PM

Twin GRA setup

400HPONLPG · 13-04-2007, 11:23 PM

The choice of air filters for straight LPG systems is dependant on the type of idle system and economy valve relationship. Positive idle systems,those that supply gas whether the engine is supplying a Vacuum signal or not,or Negative systems that rely on vacuum signal.So many variations dependent on your converter/mixer choice, have your AFR checked at idle,cruise and WOT

WB5LTR · 13-04-2007, 11:25 PM

ok 400, how do i know if mines a positive or negative setup. Anyway ive got the 14" x 4" paper filter on it know and it seems to be booting along ok. Have you played with LPG much. I mean do you know any hot up tips that i can do to my 308. Im looking at a cam swap at the moment. Any thoughts 400??
Cheers

12-03-2007, 07:34 PM	#1 (permalink)
WB5LTR Do you ever leave? Trade Rating: (0) Join Date: Mar 2007 Location: Vic Ride: Holden WB ute, '05 WR450F Posts: 2,073	Air filter for IMPCO LPG carby Hi fellas. Im just wondering if anyone knows if there are different syle air filter setups that can be used on IMPCO 425 carbs. Ive got one on 308 and the air filter is a small round but thick thing. See pic. Just want to know if there are any other options out there. VAN454 i thought you might know as you've played with IMPCO carbs before on your big block. Cheers [/IMG] __________________

13-03-2007, 04:25 PM	#3 (permalink)
WB5LTR Do you ever leave? Trade Rating: (0) Join Date: Mar 2007 Location: Vic Ride: Holden WB ute, '05 WR450F Posts: 2,073	lol epitaph ive hered you can do that. Looks like S**t??? __________________

13-03-2007, 05:01 PM	#4 (permalink)
VAN454 Hoff Jnr Trade Rating: (0) Join Date: Apr 2005 Location: sth east melb Ride: '88 Trans Am GTA Posts: 1,501	Any filter made for a holley, it will need to be 3inch thick at least __________________ THERE'S NO SUBSTITUTE FOR CUBIC INCHES........EXCEPT FOR RACE POWER!!

13-03-2007, 05:11 PM	#5 (permalink)
WB5LTR Do you ever leave? Trade Rating: (0) Join Date: Mar 2007 Location: Vic Ride: Holden WB ute, '05 WR450F Posts: 2,073	what do you run on yours van?? __________________

13-03-2007, 05:22 PM	#6 (permalink)
VAN454 Hoff Jnr Trade Rating: (0) Join Date: Apr 2005 Location: sth east melb Ride: '88 Trans Am GTA Posts: 1,501	I have a custom setup(it's not much to look at ) because I am running twin mixers. Mine is an oval filter element from a GQ Nissan Patrol with sheet metal base and lid. Just go and buy a 14inch chrome filter with the tallest element you can fit under your bonnet (or through if you like) That's what I ran when I had the 308 with a single 425 in the van. __________________ THERE'S NO SUBSTITUTE FOR CUBIC INCHES........EXCEPT FOR RACE POWER!!

13-03-2007, 08:37 AM	#2 (permalink)
epitaph HX·0304 Trade Rating: (0) Join Date: Apr 2005 Location: Tooradin Ride: HX One Tonner Posts: 1,408	ive just got a normal k&n filter on mine lol

15-03-2007, 01:51 AM	#7 (permalink)
400HPONLPG Do you ever leave? Trade Rating: (0) Join Date: Nov 2005 Location: Perth Ride: HZ one tonner Gas only, WB Stato Gas only ,XR650R Posts: 2,122	Best air filter for LPG Best air filter for LPG Ive found on the Dyno, was standard 14 :inch round with a 50 /75 or 100 mm Unifilter oiled foam but be careful of all air filters as your old impco mixer things are pretty sensitive to getting a restriction signal to operate the converter.Sometimes thats why those little air filters work well with negative idle systems.

01-04-2007, 10:44 PM	#8 (permalink)
WB5LTR Do you ever leave? Trade Rating: (0) Join Date: Mar 2007 Location: Vic Ride: Holden WB ute, '05 WR450F Posts: 2,073	just a bit of an update. I got a 14" round chrome air cleaner off ebay for 30 bucks. Managed to squeeze a 4" element under the hood with no mods. @400HP what are those oiled uni's worth?? __________________

06-04-2007, 05:52 PM	#9 (permalink)
400HPONLPG Do you ever leave? Trade Rating: (0) Join Date: Nov 2005 Location: Perth Ride: HZ one tonner Gas only, WB Stato Gas only ,XR650R Posts: 2,122	Just go to unifilters site and look for a distributor in your area, I think I used coventry's

06-04-2007, 05:58 PM	#10 (permalink)
400HPONLPG Do you ever leave? Trade Rating: (0) Join Date: Nov 2005 Location: Perth Ride: HZ one tonner Gas only, WB Stato Gas only ,XR650R Posts: 2,122	Around $60 including Oil from Coventry's Being a newbie,How do you include a picture in these posts ?

07-04-2007, 07:13 PM	#11 (permalink)
WB5LTR Do you ever leave? Trade Rating: (0) Join Date: Mar 2007 Location: Vic Ride: Holden WB ute, '05 WR450F Posts: 2,073	Hi 400, i went to the uni filter site and it said 80-odd bucks. A price hick maybe?? I hadtrouble with pics too. You have to have the pics online some where. I used photobucket.com. Then you use the insert URL icon and paste the address of where your pic is. It took me a while to nut it out. You'll get there __________________

12-04-2007, 09:56 PM	#12 (permalink)
bluev8vl Newbie Trade Rating: (0) Join Date: Apr 2007 Location: vic Ride: vlv8 BlownVX Posts: 15	yeah ive got a 14inch on my gas carb on of the chrome ones u buy from autobarn. Last edited by bluev8vl; 12-04-2007 at 10:00 PM.

13-04-2007, 11:17 PM	#13 (permalink)
400HPONLPG Do you ever leave? Trade Rating: (0) Join Date: Nov 2005 Location: Perth Ride: HZ one tonner Gas only, WB Stato Gas only ,XR650R Posts: 2,122	Suitable air filters for LPG Twin GRA setup

13-04-2007, 11:23 PM	#14 (permalink)
400HPONLPG Do you ever leave? Trade Rating: (0) Join Date: Nov 2005 Location: Perth Ride: HZ one tonner Gas only, WB Stato Gas only ,XR650R Posts: 2,122	new straight LPG system uses 14" 75mm unifilter The choice of air filters for straight LPG systems is dependant on the type of idle system and economy valve relationship. Positive idle systems,those that supply gas whether the engine is supplying a Vacuum signal or not,or Negative systems that rely on vacuum signal.So many variations dependent on your converter/mixer choice, have your AFR checked at idle,cruise and WOT

13-04-2007, 11:25 PM	#15 (permalink)
WB5LTR Do you ever leave? Trade Rating: (0) Join Date: Mar 2007 Location: Vic Ride: Holden WB ute, '05 WR450F Posts: 2,073	ok 400, how do i know if mines a positive or negative setup. Anyway ive got the 14" x 4" paper filter on it know and it seems to be booting along ok. Have you played with LPG much. I mean do you know any hot up tips that i can do to my 308. Im looking at a cam swap at the moment. Any thoughts 400?? Cheers __________________

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