NJShelby120

Hey guys. Not totally sure this goes in this thread, but I firgured it could be somewhat usefull in a racing sitution... but mods, if it needs to be moved please do so Now we all know when you go forced induction we run into thermal compression or when the compresser builds boost it also heats the air from a result of the boost. Ive always wondered what kinda of temp diff I was getting from the air filter to boost side of my non-intercooled vortech. So today I decided to throw on a digital thermometer that can take 3 temps and give a temp diff between 2 of the sensers. First senser was put on the throttle body elbow or after the vortech. Second senser was put right under the air filter element to sense outside air that made it to the filter as the car was moving forward. I did a few runs from 1st to 3rd and made full boost. Heres what I found with everything up to temp........
Type of S/C- Vortech V3 Si trim at 8lbs of boost, non-intercooled
Outside ambient temp- 43 degrees
Intake air by filter element 40-50 mph min boost- 42 degrees
Boost side of vortech 40-50 mph min boost- 72 degrees
Boost side or vortech under 8lbs boost- 86 degrees
Intake air by filter element under 8lbs boost- 42 degrees or un changed
Overall I had a total increase of 44 degrees under 8lbs of boost and under min boost of a normal driving speed of 40-50 mph a increase 30 degrees..... Or a total of 14 degrees to get to from normal boost to 8lbs....... To be honest, I thought It would be higher temps when under boost...... Now, I would like to see what kinda variables there are when the ambient temp is say around 80-85 degrees or as fas as heat loss from ambient temp goes..... Guess Ill have to wait for that though haha.
Another cool thing for the N/A guys is you deff have a very small temp increase or your throttle body is basically getting ambient temp air..... I also posted this on s197forum.com....

aleXander2648

I always wondered about the temp difference. You defiantly need to do it in the summer time.

NJShelby120

yea this is true...... just to see how much heat loss doesnt occur from outside temp would be interesting....

luckythirteen13

your sensor or some part of your equipment is broken. when i had a vortech, after about 30min of driving, didnt matter what the outside temp was, my engine managment system would tell me temps were at 180*. sc produce over 200* when under boost. i know the snow meth injection kits are designed to drop boost temps to around 120-140* so there is no way your seeing 88* under boost, its impossible. the same ems now that i have an intercooler reads just above ambient while crusing. i have never checked the temp while under boost

NJShelby120

engine managment system? where was the senser located that your talkin about? sounds like the IAT senser? and no my equipment isnt broken bud.... sounds like that was reading from the iat and yea that senser is inchs away from a engine that is up to temp like maybe a oil temp of 180 degrees? thats why it didnt matter what the outside temp was..... or thats what it sounds like

luckythirteen13

it is using the iat which is reading just before the air enters the heads.

there was a slight variation in temp depending on ambient temp but it was minor. really cold days intake would be 172 and really hot days it would be around 190.

it is easy to assuming because it was right at 180 which is engine opperating temp that the two might be related and honestly i would have made the same assumption if it wasnt for the fact that the air temps with an intercooler dropped drastically, just above ambient

FoxGT

Luckythirteen is right. Those temps are too low even if your compressor was the most efficient one for the airflow the outlet temps would be significantly higher than that at 8psi unless there was something making it cooler.