Smooth idle return
05-27-2005, 02:18 AM
#11
2nd Gear Member
Thread Starter
Join Date: May 2003
Location: Canada
Posts: 159
RE: Smooth idle return
ok done 2 plate for my car.one with a 5/16 hole.wich i tried first but was to big.not droping fast enough.made another one with a 7/32 hole.cold is not that bad,idle a little high in the begining but not that bad.but when hot,drop very fast.to fast as it will stall sometimes.so i am gonna open the hole a little bigger and it should be perfect.
i took me around 30minutes to do one plate and not even five to put it in.
and the car bubble a lot more in the exhaust.like my old carburated F-Bird hehe.
made them from 7075 aircraft aluminium .063" thick.
very good mod if you ask me.
and on my car,the IAC only have one hole.not 2 like the mach1 in the links.so i needed to drill only one small hole and no big one.
i took me around 30minutes to do one plate and not even five to put it in.
and the car bubble a lot more in the exhaust.like my old carburated F-Bird hehe.
made them from 7075 aircraft aluminium .063" thick.
very good mod if you ask me.
and on my car,the IAC only have one hole.not 2 like the mach1 in the links.so i needed to drill only one small hole and no big one.
05-27-2005, 06:37 AM
#12
Join Date: May 2005
Location:
Posts: 28
RE: Smooth idle return
ok........I am gona show my newb sataus here but what is the IAC and how does restricting it make it better? I was always under the impression that the lesser the restriction the better. can someone clarify for me?
05-27-2005, 12:08 PM
#13
2nd Gear Member
Join Date: Jan 2005
Location:
Posts: 486
RE: Smooth idle return
ORIGINAL: SilverGTV8
Cheaper solution is a 1/2" copper cap. Drill a 1/4" hole in the end and insert it into the IAC feed line. Revs will be much better. Cost you all of 40cents. You'll spend more time gettign the cap then making it and installing it.
Cheaper solution is a 1/2" copper cap. Drill a 1/4" hole in the end and insert it into the IAC feed line. Revs will be much better. Cost you all of 40cents. You'll spend more time gettign the cap then making it and installing it.
sq2drsq, read about it here:
http://www.mach1registry.org/forums/...threadid=18330
05-27-2005, 12:17 PM
#14
I ♥ Acer
Join Date: Feb 2005
Location:
Posts: 1,273
RE: Smooth idle return
ORIGINAL: sq2drsq
ok........I am gona show my newb sataus here but what is the IAC and how does restricting it make it better? I was always under the impression that the lesser the restriction the better. can someone clarify for me?
ok........I am gona show my newb sataus here but what is the IAC and how does restricting it make it better? I was always under the impression that the lesser the restriction the better. can someone clarify for me?
Restricting it allows a hanging idle to drop faster. It has no effect on performance, other than the sound when letting off the throttle is more like that of a carbuerated engine.
05-27-2005, 12:22 PM
#15
4th Gear Member
Join Date: Aug 2003
Location: United States
Posts: 1,974
RE: Smooth idle return
Just go to the plumbing section of the hardware store and pick up a few 1/2 copper caps. The people there should (better) know what you are talking about. If you get a few you can try a couple of different sized holes. The smaller the hole, the faster the RPMs will drop but idle ability will drop to the point of stalling if the motor is put under load.
05-27-2005, 07:58 PM
#16
2nd Gear Member
Thread Starter
Join Date: May 2003
Location: Canada
Posts: 159
RE: Smooth idle return
not to forget it sometime idle a little higher with a restrictor plate.just have tto find the good hole size for you.
and when you let go the gas while runing,damn it sound nice with this mod.
and when you let go the gas while runing,damn it sound nice with this mod.
05-31-2005, 10:17 AM
#17
2nd Gear Member
Join Date: Jan 2005
Location: Cinci
Posts: 238
RE: Smooth idle return
ORIGINAL: |MusTang
not to forget it sometime idle a little higher with a restrictor plate.just have tto find the good hole size for you.
and when you let go the gas while runing,damn it sound nice with this mod.
not to forget it sometime idle a little higher with a restrictor plate.just have tto find the good hole size for you.
and when you let go the gas while runing,damn it sound nice with this mod.
05-31-2005, 01:52 PM
#18
3rd Gear Member
Join Date: Apr 2005
Location:
Posts: 505
RE: Smooth idle return
5/16 is PERFECT for my car idle drops instantly when i start my car in the morning and when i rev, but when i have the ac on it idles at 550-600 rpm. But as far as that guy selling that on ebay for $15 that pi$$es me off i can make 50 of these in 10 mins and sell them easy for $7.00 shipped, i guess i will have to do that...
05-31-2005, 04:33 PM
#20
2nd Gear Member
Join Date: Jan 2005
Location:
Posts: 486
RE: Smooth idle return
I did this over the weekend. I used a plastic threaded bushing from a B&M shifter ****. Worked great. I used a 1/4" drill bit, and just reamed it out a hair...
Idle drops nicely now. I get a little more sound from the intake, but I'll live with it... The thing I like the most is that shifting seems so much smoother, since the RPM's fall to just about where they need to be for the next gear when upshifting in normal driving...
Idle drops nicely now. I get a little more sound from the intake, but I'll live with it... The thing I like the most is that shifting seems so much smoother, since the RPM's fall to just about where they need to be for the next gear when upshifting in normal driving...
