What kind of intake air temps are you seeing with your supercharger setups. I noticed after driving around for a while mine are up around 175*. I just wanted to know if this is about normal. BTW it is non intercooled too.

 

OUCH! I have an intercooler and only see 130* after beating the crap out of it for a while. 175* seems pretty damn hot to me.

 

Thats what I am thinking. Anyone else have some temps to post?

 

I generally see around 100* with my intercooled setup on a warm day.

 

First and foremost, it is difficult to compare intake air temps because of all the variables. Two of those variables are ambient air temp and impeller rpm. Let's say for argument's sake that all things are equal (except one) and that I would like to compare intake air temps using two different blower pullies. I have used a number of different pullies, resulting in different impeller rpms and discovered that the faster you turn the blower, the more heat it generates -- again, under the same conditions.

I find it totally within reason to see 175 F without an intercooler. On a 100 degree day cruising on the interstate at 75mph (2800 rpm), I have seen pre-intercooler temps well in excess of 200 degrees. In stop-and-go traffic, I see temps in the 150-180 range (again on a 100 degree day). After the intercoolers is another story.

I have three digital air temperature gauges in addition to the factory sensor in the plenum. The first gauges shows air temperature in my airbox (before the blower). The second shows the blower output temperature (before the intercoolers) and the third is after the intercoolers. Comparing the third to the factory sensor, I have information on how much the air is heated strictly from heat soak for the ducting from the intercoolers to the plenum.

You might want to take a look at a couple of my very old posts for somewhat related information:

https://www.thirdgen.org/techbb2/sho...threadid=36630

https://www.thirdgen.org/techbb2/sho...threadid=36275

 

Very informative posts. I was actually thinking of putting the alcohol system for my turbo regal on the vette to see how it would work. Where did you get the sensors and guages for the air temp. I actually though about that a while back and using two and going back and forth between the two but I thought it might confuse the ecm since I didn't have a guage. I would like to try a dual setup of guages if you could inform me of the way you did it. The bad thing about my blower is the inlet and air cleaner are right above the drivers side header. Great place!

 

When I first installed a supercharger, it was without an intercooler or water/alcohol. I never saw as much detonation as I did then. The first thing I did was install a water system. Detonation became history.

The digital air temp gauges are Nordskog and include the sensors. I bought them from Summit. In all reality, you can accomplish the same thing with only one gauge with multiple sensors. Use a switch to flip back and forth between sensors. These gauges are not connected to the factory electronics -- only the stock sending unit in the plenum is.

Yes, my D1SC also came with a K&N that sat right over the header. I fixed that problem with a custom-built air cleaner assembly (it houses a Corvette TPI filter) and a cowl induction hood. Some things have changed since the attached pic, but you get the idea....

Willie

 

willie what do you think you would be running in the 1/4 if you switch to a 350 and had if you dont already a T-56 6 speed and a 100 shot of nos just wondering because im half way there to running that set up.

THANKS FOR YOUR TIME :hail: :hail: :hail: :hail: :hail: :hail: :hail: :hail: :hail: :hail:

 

Hey Willie, you don't happen to remember what kind of air temp. differences you saw by just changing where the air filter is located do you? Also, did you notice if the was any loss in boost with that setup? I heard that centrifugal superchargers are very sensitive to any inlet restriction.

 

willie what do you think you would be running in the 1/4 if you switch to a 350 and had if you dont already a T-56 6 speed and a 100 shot of nos....

I don't like guessing E/T's because it only sets you up for disappointment. I make a change, run the car and evaluate. So I can't answer your question.

Willie

 

Hey Willie, you don't happen to remember what kind of air temp. differences you saw by just changing where the air filter is located do you?

I did not have my gauges installed prior to my current airbox, so I do not know the difference in temperature. I can only imagine though, considering the air filter used to sit right over the header....


Also, did you notice if the was any loss in boost with that setup? I heard that centrifugal superchargers are very sensitive to any inlet restriction.

I experienced no loss in boost. Consider that all I did was extend the 4-inch ATI rubber hose and replaced the cone-style K&N (763 cfm) with a rectangular piece (768 cfm).

Willie