Look at the Manifold PSI rating. Depending on your elevation, it should read above 14 (assuming sea level) when the SC kicks in.

 

Thanks, that must be the Intake Pressure Absolute.

 

My car is an NA, I have the " Ultra Gauge", intake air temp. used to be about 125 F, I increased the intake air tube size to 2.75inches on both sides and bring the air in before the radiator. This dropped it to about 115F. I have since insulated the bottom side of my air box( engine cover). I have not had a chance to even start it yet ( bad weather), I will follow up with update.

 

Post 80, member Mirenic, Take a good pair of a high temp wire and connect it to a lamp in the car, the other end find where the wires terminate for the S/C clutch and put one wire on each of the two. Now when the clutch engages/disengages, you'll have the lamp light and go out as it cycles on and off. If it's cutting on and off, it might be pretty annoying but it'll show you exactly what you want to know at a very low price. Only thing, make sure the light is not too bright!

 

Thanks, I seen that in a post elsewhere. I just thought with the UltraGauge installed, it might be matter of viewing a performance function of the gauge. As itsky indicated, manifold pressure above atmospheric pressure should be a good indicator.

 

Personally speaking, it would be better to keep my eyes on the road and just watch a light out of the corner of my vision.

 

Have anybody tried to use the Ultragauge parallell with dashdaq through a OBDII Y splitter??

 

First time out with the ultraguage on a 9 degree night for a little warm up run with the Crossfire.

Ultraguage readings tonight:

Running down the road at 60mph
Outside temperature 9 degrees
Engine temp 183 degrees
Intake temp reading a cool 22 degrees.
Hit the throttle wide open for about 10 seconds and watch the intake temp drop to 18 degrees as it pulls in that frigid outside air.
These cars are definitely more powerful with cold air.
Shows the true meaning of a Needswings "Cold Air Intake"

 

That's beautiful. I wish we had winter here. Everyday it's in the 80's so I'm lucky if I can get the temps below 100 on a good day.

How much HP gain per 10 degree temp drop? - Corvette Forum

"With no change in altitude, relative humidity, or air pressure, the SAE correction factor is slightly over 1% for every 10 degrees F.

So 400 HP at 77 degrees converts to:
387.6 HP at 107 degrees
414 HP at 47 degrees

Additionally, humidity changes the results by about 1.85% for every 50% of relative humidity.

Every 1000 feet of altitude changes the result by approximately 4.2%

Every 0.5 inches of mercury (air pressure) changes the result by around 2.1%

SAE HP is achieved at 0 feet above sea level, 0% relative humidity, 77 degrees F, and 29.235 inches of mercury."

So between where you are and Guam I've seen my intake temps get upto 150F with the Needswings CAI in traffic and down to 95F when cruising at ~50mph. So I'm losing about 7.3% at 150F and you're gaining right at about 6%! So Jealous!

 

You must be a scientist to know all that info
I'm definitely feeling more power in the cold than I ever noticed before !!

 

Cool air means more fuel, means more HP... If you are supercharged, means you better have enough fuel...

 

Roads were dry and with a outside temp at 11 degrees the CAI is really pulling in COLD air.
Watch the air intake temp drop on my Ultraguage as I accelerate
Also ya can hear the sweet sound of the Magnaflow Cat-Back exhaust

 

I dont think I've seen a CAI below 50F. EVER.
The car sits in the garage - and the stock intake is a heat sink.

 

Just installed my UltraGauge. I have boost psi set up. But at idle it shows only -9.6 inches of vacuum. Seems way too low unless I have a massive vacuum leak? If I did why am I idling perfect around 750rpms.

 

Vacuum leaks would increase the pressure in the manifold, moving the pressure toward the ambient pressure, because it would be sucking air into the manifold
system.

 

Usually with a vacuum leak your idle will go up. My SRT-4 was around 18-20 inches of vacuum at idle. That is why I was worried with the UltraGauge showing 9.X inches of vacuum at idle.

Did notice that fat rubber line that goes from the passenger needswings intake to the valve cover was kinked. Going to fix that soon. First blower car in a sense. Do these cars have boost leaks?