Intake temp ?'s

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farmboy3510

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Sep 17, 2008
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What is the optimum temp to be below or at to make the most power when pulling? I going to put a temp sensor in the intake to see what mine is. I do not think that my stock intercooler is keeping up. Would water help or would that just band aid the problem. Thanks for any of the help.
 
I run an intake temp sensor in the intake right next to the intake horn. I run a air to air cooler with a set of 5500 cfm fans sucking through them. The 1 run that i forgot to turn the fans on the temps got 500+. Normally it runs between 150-190 at the end of the track depending on the outside temps and doesnt matter if i have my 3.0 or unlimited single on they are both with in those two #
 
Jeremy what did you use for a sensor? I have a 1/8" Thermocouple in the intake horn and only see about 200*
 
Same as you, 1/8" thermocouple that were made for exh temps but i had a few extra so i stuck it in the intake. Jarred are you still running a stock cooler? I run a big sperco.
 
Mine is one I had laying around also. On my data logger I see it is still going up at the end of the run and suspect that its not fast enough for what I am trying to do with it. Anyone have experience with something that is faster?
 
JerrodGlover said:
Mine is one I had laying around also. On my data logger I see it is still going up at the end of the run and suspect that its not fast enough for what I am trying to do with it. Anyone have experience with something that is faster?
Click to expand...

Who's data logger are you running?
 
Mine does the same thing it continues to climb until i let out of it at the end of the track, never does level off
 
JerrodGlover said:
The TS Logger.
Click to expand...

Ok where did you get it because there is a truck at my shop with one of those on it and the owner said they called Dennis and he said they didnt build it and i need software for the stinking thing
 
The problem y'all are dealing with is called sensor hysterisis - we use Type K's in applications that require near-instantanous response time.

I've never spec'd a sheathed probe in any part of the intake tract.
 
You know now that you say that i had a probe in my head when i sent it out that was thin and came to a sharp point (is that the type K) and when it came back it was gone. Thats why i used the exh probe. The exh probes would always be sheathed right?
 
Yes, exhaust probes are sheathed (though bare junctions are great for testing).

Most temp probes are Type K - should have posted "exposed-junction" (unsheathed) above - they have superior response.
 
I was told that I need to keep the temps below 120, is that realistic? After reading this there probly no way that my stock intercooler is keeping up.
 
Sure - below 120*F would be good... Cummins spec's the ideal cylinder charge air temp range as 60-90*F.

Single chargers can generate CAC inlet temps over 350*F, and air/air cooling reduces the differential to ~25*F at WOT (disregarding heat soak)... non-IC twins can push 500*F+ air into the CAC.

Some of the OEM CACs are actually pretty efficient, such as the 3rd Gen Ram's.

If you're too hot, use water - it provides benefits beyond cooling (increases mean cylinder pressure).
 
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