ilde issuse's with big cam i6

19-09-2005, 04:06 PM

i was thinking about getting a custom grind done for our au2 falc .is there anyway other than getting a chiptorque chip to get it to idle? i don't realy want to go through the dramas of pulling the unichip out and getting a chiptorque .
i remember reading on a forum somewhere that some had suggested to drill a small hole in the butterfly of the throttle body to help keep the idle up .do you reckon this would work or not?
thanks jake

Walkinshaw · 19-09-2005, 04:27 PM

The unichip should beable to tame down a cam to a level where an acceptable idle is achieved. Just get the unichip retuned when the cam goes in.

xr8ute · 19-09-2005, 04:31 PM

Bigger cams generally want more air at idle. The way EEC handles this is by changing the duty cycle of the ISC.

There is probably a Jaycar kit you could use as an "interceptor" between the EEC and ISC to add more duty cycle at idle.

Or you could drill a little hole in the throttle butterfly.

BTW, you can run both a Unichip and Chiptorque if you wanted. The Unichip is not actually a "chip", it's a piggyback computer.

19-09-2005, 04:47 PM

i will be over at g and d performance on thursday so i will ask them what they can do with the unichip regarding the idle .
xr8ute were would i go to enquire about one of these jaycar kits ?also if i was to drill a hole in the butterfly what size would you reckon i should start with first 3/4 mm.how would this affect setting the base idle ?
thanks jake

**Stav** · 19-09-2005, 05:15 PM

Jake my dev 4 cammed car idles excellent.It idled a bit rougher before and the problems areas were the orings and or injectors.The next probllem area are the lifters.The shimm Jmm are not the ultimate.Pm me for some advice.

xr8ute · 19-09-2005, 06:02 PM

See what G&D recommend before anything else. How big is your cam?

As Stav was saying, make sure the condition of the rest of your engine is in good nick. With a larger cam, your engine will be less tolerant of things like worn plugs, leads, injector O-rings, inlet gasket leaks etc....

xr8ute · 19-09-2005, 06:09 PM

I wouldn't be 100% sure, but if anything works, it would be the Jaycar Digital Pulse Adjuster (needs hand controller kit also).

http://www.jaycar.com.au/productView...=&SUBCATID=347

19-09-2005, 06:19 PM

there's nothing wrong with the idle at the moment and the engines still in good cond.i have just had a head ported out and was looking at getting a custom grind done up . i just wanted to make sure i can get the thing to idle.
i will be fitting the head wednsday and hopefuly it should idle alright .
i will have a yarn to g&d first and then go from there .
thanks
jake

**Stav** · 19-09-2005, 06:53 PM

Good luck with it Jake.
Stav

SpoolMan · 19-09-2005, 07:45 PM

we have had a 222@50 cam idling fine with a Unichip and 2500 rpm stall in a AU6..
good tuners can make a big difference in your idle quality, get a dyno tune which ever way you go..
your in QLD a quick trip to Lochlan's shop would get you a custom dyno tune.