Idle RPM adder function, 1993 PCM Corvette?
Thread Starter
Le Mans Master
Joined: Feb 1999
Posts: 9,935
Likes: 38
From: South Carolina
St. Jude Donor '03 & '05
Idle RPM adder function, 1993 PCM Corvette?
I noticed on my Tunercat program that there is a function , Idle RPM adder with AC on. I have a 396LT1 with a 230/236 cam, and am wondering will this increase the engine rpm when I turn the AC on? Or what. My Vette will not idle in gear with the AC on, and I am wondering if I increase this Adder up a couple hundred rpm if it will raise the rpm so my Vette will idle in gear with the AC on? Thanks.
1993 Corvette LT1 396 cu in, 700r with 2800 stall.
1993 Corvette LT1 396 cu in, 700r with 2800 stall.
Race Director
Joined: Jan 2002
Posts: 12,263
Likes: 86
From: O'Fallon Missouri
Sure sounds like it would work. Give it a try and see what happens.
I use the "IAC offset for A/C anticipate vs A/C pressure" table on my 94. But, don't think it is available for the 93's.
I use the "IAC offset for A/C anticipate vs A/C pressure" table on my 94. But, don't think it is available for the 93's.
Thread Starter
Le Mans Master
Joined: Feb 1999
Posts: 9,935
Likes: 38
From: South Carolina
St. Jude Donor '03 & '05
Originally Posted by STL94LT1
Sure sounds like it would work. Give it a try and see what happens.
I use the "IAC offset for A/C anticipate vs A/C pressure" table on my 94. But, don't think it is available for the 93's.
I use the "IAC offset for A/C anticipate vs A/C pressure" table on my 94. But, don't think it is available for the 93's.
I dont think it will do much, but, lie you said, try it, see what happens.
Drifting
Joined: May 2003
Posts: 1,730
Likes: 1
From: Charlotte NC
St. Jude Donor '05
Originally Posted by steve40th
I think I read that 93's dont have that luxury. My tuner is very competent, but I had to ask as it was there, the Idler RPM adder.
I dont think it will do much, but, lie you said, try it, see what happens.
I dont think it will do much, but, lie you said, try it, see what happens.
Try adding 75 rpm to the idle RPM adder for AC. Stock 92-93's come with this zeroed out when it should really have some adder.
That constant wasn't in tunercat until around a year ago. It really helps smooth out cammed cars that still like AC
Thread Starter
Le Mans Master
Joined: Feb 1999
Posts: 9,935
Likes: 38
From: South Carolina
St. Jude Donor '03 & '05
Originally Posted by Alvin
Try adding 75 rpm to the idle RPM adder for AC. Stock 92-93's come with this zeroed out when it should really have some adder.
That constant wasn't in tunercat until around a year ago. It really helps smooth out cammed cars that still like AC
That constant wasn't in tunercat until around a year ago. It really helps smooth out cammed cars that still like AC
Melting Slicks
Joined: Oct 2000
Posts: 2,158
Likes: 9
From: N.E. WA
Originally Posted by Alvin
. That constant wasn't in tunercat until around a year ago. It really helps smooth out cammed cars that still like AC
That's good to know! I have been dealing with it for awhile now. My car will idle with the AC on, but not if you start the car with it on. It has to run for about 30 sec before you turn the AC on. Even then, it pulls the engine down. I'll go look for an updated version. Thanx.
