MattyB
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Registered: 13th Nov 01
Location: 118.5bhp :D
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Right...........on my 306, i have an aluminium induction pipe that runs from the back of the engine to the front, then down just behind the front bumper where my induction kit is.
I have a temp sensor in my induction cone, which takes the temp of the air coming through the induction.
As you can tell, it should stay at roughly the same temp as the outside temp right??? Wrong! When i boot it, my temp soars from 20ish degrees up past 40degrees!!!??!
Can anyone explain this?
All i can think of, is that as the turbo comes in, the induction sucks in so much air, that it starts to use some from further afield....ie: the engine etc....? Or is it friction on the temp probe??
cheers
Matt
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PaulW
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Registered: 26th Jan 03
Location: Atherton, Greater Manchester
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sounds more like its sucking in hot air. You not got anything you can use as a heat-shield?
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MattyB
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Registered: 13th Nov 01
Location: 118.5bhp :D
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this is what i'm thinkin, but with it being a turbo car, i dont wanna restrict air flow :s
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Paul_J
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Registered: 6th Jun 02
Location: London
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sure its not just your turbo getting hot as you boot it and in effect warming the air?
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MattyB
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Registered: 13th Nov 01
Location: 118.5bhp :D
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yeah i thought bout this too.....but i dont think the turbo will warm air that hasnt reached it yet, and is 2m away?
its a possilibility tho..cheers Paul....anyone else got any ideas!?
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Ditch
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Registered: 29th Nov 02
Location: St Albans Drives: JDM Celica GT4 WRC
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quote:
Originally posted by Paul_J
sure its not just your turbo getting hot as you boot it and in effect warming the air?
Induction should not be taking warm air from around the turbo
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Ditch
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Registered: 29th Nov 02
Location: St Albans Drives: JDM Celica GT4 WRC
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you got any feeds to the cone?
MORE MORE MORE!
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MattyB
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Registered: 13th Nov 01
Location: 118.5bhp :D
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lol i'm guessing i should get a few feeds hooked up leading to the cone. As it stands, i dont have any 
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Ditch
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Registered: 29th Nov 02
Location: St Albans Drives: JDM Celica GT4 WRC
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theres your answer then is it not?
im no expert on TD's but most induction cones are known to suck in hot air.
are these temps taken when the car is moving yeah?
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vibrio
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Registered: 28th Feb 01
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my temps from the cone stayed level when boosting. only went up when I was stuck intraffic. drive about with the engine warm and then stop and feel the area around the filter. my temps were 13C when it was about 9 out side
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vibrio
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quote:
Originally posted by MattyB
lol i'm guessing i should get a few feeds hooked up leading to the cone. As it stands, i dont have any
no cold air feeds and you wonder why your inlet temps are high lol
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Daimo B
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Registered: 20th Mar 00
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Get a nice big IC and you shouldn't need to worry about induction temp as it will cool going through the IC. Its at the inlet manifold you want the temps down.
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kerzo
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Registered: 10th Nov 02
Location: Norn Iron
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you cant really get a bigger ic for the 306 though without spending big dollar
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vibrio
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quote:
Originally posted by Daimo B
Get a nice big IC and you shouldn't need to worry about induction temp as it will cool going through the IC. Its at the inlet manifold you want the temps down.
no Gaimo.
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Daimo B
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Registered: 20th Mar 00
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So you dont want a cold charge of air going in the inlet manifold eh Penfold??
Thought you were supposed to know about turbo 
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vibrio
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Registered: 28th Feb 01
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quote:
Originally posted by Daimo B
So you dont want a cold charge of air going in the inlet manifold eh Penfold??
Thought you were supposed to know about turbo
I was refering to
"Get a nice big IC and you shouldn't need to worry about induction temp as it will cool going through the IC"
this bit
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Daimo B
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Registered: 20th Mar 00
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So explain why?
Thru air filter
through turbo and into IC
From IC to inlet manifold.
You want the temp low at teh IM, why is the temp at the air filter an issue?
See if you can reply without being a complete cock this time. (i know its hard).
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MattyB
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Registered: 13th Nov 01
Location: 118.5bhp :D
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quote:
Originally posted by vibrio
quote:
Originally posted by MattyB
lol i'm guessing i should get a few feeds hooked up leading to the cone. As it stands, i dont have any
no cold air feeds and you wonder why your inlet temps are high lol
not quite as simple as that matey! has a very/deep wide rad, so there is minimal room to get cold air feed pipes through. Also, with the car being low, i dont wanna mount under scoop pipe things, as these will get ripped off on speed bumps. I'm workin on it, but where the filter is positioned, is quite a cool little area
Matt
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vibrio
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Hot air in means even hotter after the turbo. the IC will only be able to cool to a certain degree. cold air in means cooler air after the turbo which means cooler air going into the inlet.
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vibrio
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Registered: 28th Feb 01
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quote:
Originally posted by MattyB
quote:
Originally posted by vibrio
quote:
Originally posted by MattyB
lol i'm guessing i should get a few feeds hooked up leading to the cone. As it stands, i dont have any
no cold air feeds and you wonder why your inlet temps are high lol
not quite as simple as that matey! has a very/deep wide rad, so there is minimal room to get cold air feed pipes through. Also, with the car being low, i dont wanna mount under scoop pipe things, as these will get ripped off on speed bumps. I'm workin on it, but where the filter is positioned, is quite a cool little area
Matt
is there any plast bits you can remove. maybe you should get the bonnet holed at the filter so cold air is gettign force into it.
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MattyB
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Registered: 13th Nov 01
Location: 118.5bhp :D
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I'm thinking chop bumper, and get a huge feed in there :s
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MattyB
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Registered: 13th Nov 01
Location: 118.5bhp :D
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yeah might have to have a little look at modifying the bumper a bit to get some cold air pipes running thru etc
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Daimo B
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Registered: 20th Mar 00
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WOW, you done it, a normal reply
Ok, so hot air into the turbo, when a turbo is creating Up to 1000 degrees in heat, what difference is a couple of degrees going to make? Temps going to sore up after the turbo anyway, and with a good IC fitted it should reduce the temps by a considerable amount anyway.
Air feeds will help, but only really are effective at higher speeds when the airflow can be directed to the air filter. But you need to be doing a fair speed to get that air forced up the airflow pipe.
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MattyB
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Registered: 13th Nov 01
Location: 118.5bhp :D
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quote:
Originally posted by Daimo B
WOW, you done it, a normal reply
Ok, so hot air into the turbo, when a turbo is creating Up to 1000 degrees in heat, what difference is a couple of degrees going to make?
Sorry Daimo.....but u'll never get charge temperatures that high.....never going to be over 150degrees entering the intercooler.
Possibly the turbo casing on some racing cars get that high, but never the charge temps.
Matt
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vibrio
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quote:
Originally posted by Daimo B
WOW, you done it, a normal reply
Ok, so hot air into the turbo, when a turbo is creating Up to 1000 degrees in heat, what difference is a couple of degrees going to make? Temps going to sore up after the turbo anyway, and with a good IC fitted it should reduce the temps by a considerable amount anyway.
Air feeds will help, but only really are effective at higher speeds when the airflow can be directed to the air filter. But you need to be doing a fair speed to get that air forced up the airflow pipe.
I had mine set up with temp gauges for a while. the underbonnet temp rose to around 40C in normal driving and the filter temp showed this when stuck in trafic. once started the cone temp dropped down to 20c almost as soon as I had started moving. took a while longer to get down to 15C but thats normal city driving.
pre intercooler temps would be around 160C I think (not 1000C thats more like EGT) so a 10-20C change before the turbo would make a significant change to the temp after the turbo. you need cold air feeds and a cool filter temp to help reduce the charge of the inlet temp.
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