What happens if I don't use an IAC system

General Tuning Questions And Discussions
User avatar
vlad01
Posts: 8124
Joined: Mon Oct 08, 2012 6:41 pm
cars: VP I S
VP I executive
VP II executive
VP II executive #2
VR II executive
Location: Kyneton, Vic

Re: What happens if I don't use an IAC system

Post by vlad01 »

yeah sort of, except the ones I seen are plastic and don't have an adjustment screw.
I'm the director of VSH (Vlad's Spec Holden), because HSV were doing it ass about.
Dazza92VP
Posts: 607
Joined: Sun Jun 06, 2010 9:59 am
cars: 92 VP V8 Wagon
Location: Perth

Re: What happens if I don't use an IAC system

Post by Dazza92VP »

VX L67 Getrag
Posts: 2959
Joined: Sun Aug 02, 2009 9:16 pm
Location: Bayside, Melbourne, Victoria
Contact:

Re: What happens if I don't use an IAC system

Post by VX L67 Getrag »

I know I just made 1 up 10+ years ago to work as factory on my twin throttle gas research setup & I just butchered a standard IAC housing & tapped barbs into it & had 1 on fresh air side & 1 on manifold side & just ran factory VR-VS V8 Auto computer!
User avatar
vlad01
Posts: 8124
Joined: Mon Oct 08, 2012 6:41 pm
cars: VP I S
VP I executive
VP II executive
VP II executive #2
VR II executive
Location: Kyneton, Vic

Re: What happens if I don't use an IAC system

Post by vlad01 »

Dazza92VP wrote:How about this one
http://www.lpgshop.co.uk/brc-step-motor/

thats the one!
I'm the director of VSH (Vlad's Spec Holden), because HSV were doing it ass about.
User avatar
Holden202T
Posts: 10394
Joined: Sat Feb 28, 2009 9:05 pm
Location: Tenambit, NSW
Contact:

Re: What happens if I don't use an IAC system

Post by Holden202T »

yeah they look about right, im sure the first one will appeal to vlad01, thats his favourite ebay seller ;)
VK_3800
Posts: 563
Joined: Sun Jul 04, 2010 3:15 pm
cars: SS Torana
Location: NZ

Re: What happens if I don't use an IAC system

Post by VK_3800 »

I just recall seeing a few in my Trademe/eBay travels when I was looking for the same thing due to having a four barrel throttle body with no provision for one. I ended up machining the throttle body but I did come across one or two that would have worked in a hose - maybe factory BMW or something like that rings a bell?

The one above would do the trick anyway, I'm late to the party
User avatar
jenko
Posts: 450
Joined: Wed Jan 29, 2014 3:43 pm
cars: hilux v6
jaguar v12
mitsubishi lancer
fj cruiser
sv 21 camry wagon
Location: Pine mountain .vic
Contact:

Re: What happens if I don't use an IAC system

Post by jenko »

You can use a Bosch 0280140164 Auxiliary Air Valve .I used it on one of the delco jag v12 conversions worked fine you can get a bit more idle control by using the idle ignition advance it seems the factory setting for idle advance tappers off the advance as manifold vac drops, where if you have it increasing as manifold vac drops it can catter for ps pump loads and alternator loads much better .
Using the wax pellet on the throttle body probally not as good as aux air valve as it moves the throttle position thus taking it out of idle mode .
On the jag engine there is 700 rpm difference between idle at 10deg btdc and 25 btdc just make sure the full load advance at idle is not too much.
User avatar
vlad01
Posts: 8124
Joined: Mon Oct 08, 2012 6:41 pm
cars: VP I S
VP I executive
VP II executive
VP II executive #2
VR II executive
Location: Kyneton, Vic

Re: What happens if I don't use an IAC system

Post by vlad01 »

Holden202T wrote:yeah they look about right, im sure the first one will appeal to vlad01, thats his favourite ebay seller ;)
haha dont get me started!
I'm the director of VSH (Vlad's Spec Holden), because HSV were doing it ass about.
Charlescrown
Posts: 1959
Joined: Sat Aug 06, 2011 7:58 am
cars: V8 VR Commodore BT1
LB Lancer 2L turbo & Delco
Starion TBI with Delco
Mitsubishi Lancer EVO4 track car
NA MX5
3 vintage motor bikes
Location: Padstow NSW

Re: What happens if I don't use an IAC system

Post by Charlescrown »

Thanks heaps. I have a couple of friends in the LPG business and am sure to be able to source one now I know what I am looking at. The car already has a cold start/rum fast idle system but it would be nice to use a more modern system.
Post Reply