What is good vacuum for a auto 1g and idle?

[talontsiboy24]

My vacuum is 16-18 when i put it in drive in the daytime and when its in park its 20...now at night with the lights on it will be 16 in drive and still 20 in park is this normal for automatic?

as for my idle its wierd like today it was in the single digits and negative temps and when i cold started it up it idled at like 1250 for less then a minute and drop to like 1000 as it warmed up. But then after it was warmed up and i went driving around for a bit and i put it in park it idled at almost 1300 and then in drive like 900-975. If it was warmer out like summer or 50s and up it will idle less? My chip is for a manual car and mine is auto but its made for my mods its set to 850rpms maybe i need to get a chip for auto? chip has 8000rpm rev limit,680cc injector compensation and deadtime, 2g mas compensation, custom fuel and timing maps. Octane reset, fuel cut removed.

I have ngk bpr7es plugs .028 gap is that good enough for 22-24psi or i should gap them down more?

 

[standard235]

Yes. The car is under more load in drive than in park. You have great vacuum.

 

[talontsiboy24]

Anybody else?

 

[definitiveno]

I get about 10. I have a CNC ported race head and fp3 cams though.....

 

[ramsack]

-22 - -18 inHg is good. It will be -15 - -10 or lower with some crazy cams. You only need to gap plugs down if you are blowing out spark.

 

[talontsiboy24]

Ok today it was 12f and the car was super cold havent been started since yesterday so i started it up and it idled at 1250 for less then 30seconds and went down to 1000-1100rpms this doesnt seem right to me? when the temp stick got to the middle the idle was 1200. Then i put it in drive and it was idling 850. Drove around for like 25min or so and the idle in drive with the lights on were 950-1000rpms then in park lights on fan on about 1200rpms....Lights off and fan off 1250-1300rpms.

 

[talontsiboy24]

^^^^Anybody?