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What Is Your Intake Temperature ?

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Old Oct 3, 2005 | 06:54 PM
  #26  
WaLieN's Avatar
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Originally Posted by XSrcing
my intake temps are generally about 20-25*f above ambient. and that is with a crappy little blitz stock mount and apex'i intakes above the radiator. i know, i know. i need a better intercooler and a heatshield around the intakes. i've only had the thing a week.
How are you measuring this?
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Old Oct 3, 2005 | 07:41 PM
  #27  
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I have an intake temp gauge that reads in F and when I drove my car around this summer in the 95F heat, my cruising temps would be in the 120-130F. With my car totally heatsoaked the temps would be at 160F for about 10 min. But on a 80F night with my meth injection spraying, I could get temps down to 70F. I also have a custom FMIC.
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Old Oct 3, 2005 | 08:09 PM
  #28  
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From: Clearwater, FL
Originally Posted by rallimike
Measures take to lower AIT: heat shield between turbo amd LIM & UIM; ceramic coated turbo, DP, LIM, UIM; insulating spacer between UIM & LIM; 4" mandrel bent cold air intake. Note my description above was about low/no boost running. Under those conditions, I stay near ambient.
If I wind out 2nd & 3rd, I'll get no more than a 1C increase; that I attribute to my Bell SMIC (24X9X3). A couple of weeks ago, I did a road tune with Steve Kan. That consisted of repeated 3rd gear pulls on I95. Steve said the AIT never got above 37C. My guess would be ambient was in the mid 80F's.
Is that using the Aquamist? Otherwise I don't buy it, it's a matter of physics. The air is picked up near the road in most cases 5-15 hotter than what we call ambient super heated in the turbo run through a heat soaked IC which is picking air from the road. That mean the coldest temp you could hope to achieve is the temp of the IC which I will assure you is higher than ambient. In the real world 90% efficiency is about the best that can be achieved with an air to air intercooler. Your numbers are a little better than 90% however with a SMIC set up it's far from ideal because of heat soaking. Everything you've done before and after the intercooler which is a huge improvement in limiting reheat isn't going to reduce temp anymore.
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Old Oct 3, 2005 | 08:47 PM
  #29  
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When I pull the wiper washer lever, water shoots out of two nozzles mounted in front of the intercooler. I've heard it sizzle fo shizzle on hot nights, and I watch my AITs plummet in seconds. Easy mod- drill two holes, mount two nozzles, divert windshield washer lines.
Attached Thumbnails What Is Your Intake Temperature ?-misters.jpg  

Last edited by Old Slow Coach; Oct 3, 2005 at 08:58 PM.
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Old Oct 3, 2005 | 09:52 PM
  #30  
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this is my airtemp from the pfc affter 20 minu of driving

got home
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Old Oct 3, 2005 | 10:00 PM
  #31  
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I see 50-56C intake temps on days in the mid to high 90's F. Thats with a stock mount medium IC. Are you guys using any ducting at all?
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Old Oct 3, 2005 | 10:11 PM
  #32  
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"Otherwise I don't buy it, it's a matter of physics."

Come on up to PA...I'll take you for a ride.
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Old Oct 3, 2005 | 10:55 PM
  #33  
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From: Clearwater, FL
Originally Posted by speedsilver7
this is my airtemp from the pfc affter 20 minu of driving

got home
Before I start my car the temp is higher than that. Whats the ambient without that your numbers are meaningless. The fact of the matter is air to air is 90% efficient max. People with engineering decrees have determined this not me. If it was better than that intercooler manufactures would be making those claims, but its just not the case.

Originally Posted by rallimike
"Otherwise I don't buy it, it's a matter of physics."

Come on up to PA...I'll take you for a ride.
I'm not saying your car isn't fast I'm just saying that you IC isn't that efficient. All things being equal by your own word you making only 10 more HP than me based on temp. Now the fact that you run a single I would hope that your making more power than me, no argument there. That not the point though is it? The point is that just about any good FMIC is more efficient than any SMIC FD. It "might" be possible with a ducted V-mount and vented hood. Otherwise an FD is just not designed for optimal IC performance because of heat soaking.
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Old Oct 3, 2005 | 11:30 PM
  #34  
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From: north ca
the airtemp outside was 68 to 75 f
Originally Posted by FLA94FD
Before I start my car the temp is higher than that. Whats the ambient without that your numbers are meaningless. The fact of the matter is air to air is 90% efficient max. People with engineering decrees have determined this not me. If it was better than that intercooler manufactures would be making those claims, but its just not the case.



I'm not saying your car isn't fast I'm just saying that you IC isn't that efficient. All things being equal by your own word you making only 10 more HP than me based on temp. Now the fact that you run a single I would hope that your making more power than me, no argument there. That not the point though is it? The point is that just about any good FMIC is more efficient than any SMIC FD. It "might" be possible with a ducted V-mount and vented hood. Otherwise an FD is just not designed for optimal IC performance because of heat soaking.
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Old Oct 3, 2005 | 11:42 PM
  #35  
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From: Clearwater, FL
Rallimike I would be love to take ride in your FD, I go up to Erie a couple a times a year maybe we can hook some time. Despite our disagreement I would love to check out your car.

speedsilver7, are you boosting the car I would guess not. Thats what the issue at hand is, I like the rest of you are in quest for knowledge. Engines aren't tuned by tuner for cruising speeds. Your low engines temps 82,83 tell me you aren't running it hard at least not for long unless you have the holy grail of fd radiators.
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Old Oct 3, 2005 | 11:53 PM
  #36  
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From: north ca
i was stuck in traffic on the way home,i did boost it hard affter the traffic ihihihi
[QUOTE=FLA94FD]Rallimike I would be love to take ride in your FD, I go up to Erie a couple a times a year maybe can hook some time. Despite our disagreement I would love to check out your car.

speedsilver7, are you boosting the car I would guess not. Thats what the issue at hand is, I like the rest of you are in quest for knowledge. Engines aren't tuned by tuner for cruising speeds. Your low engines temps 82,83 tell me you aren't running it hard at least not for long unless you have the holy grail of fd radiators.[/QUO

Last edited by speedsilver7; Oct 3, 2005 at 11:55 PM.
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Old Oct 3, 2005 | 11:54 PM
  #37  
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Originally Posted by speedsilver7
the airtemp outside was 68 to 75 f
is right...you must have the most efficient IC on earth! 18C=64.4F
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Old Oct 3, 2005 | 11:54 PM
  #38  
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Jinx
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From: Raleigh, NC
Even running hard on the track when my water temps are 95-100 dec C. I don't see intake temps more than 56 deg c. If I'm getting than with a stock mount medium IC then it would seem some of you FMIC need to look at ducting to utilze the greater potential there.
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Old Oct 3, 2005 | 11:58 PM
  #39  
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From: north ca
this is my set up

Originally Posted by Trevor
is right...you must have the most efficient IC on earth! 18C=64.4F
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