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Air intake temperatures ? 

 

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 Post subject: Air intake temperatures ?
Posted: Sat Dec 25, 2004 8:29 am 
Getting Side Ways
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Ride: BA XR6 Turbo

Power: 175 rwkw

Location: The Shire, Sydney
NSW, Australia

Hey guys

I've recently hooked up my indoor/outdoor thermometre in my EF and have put the outdoor sensor in the pipe leaving the top of the airbox.
I was quite suprised to see that driving around the temperatures are up around 70 degrees, and that's just at the airbox not even over the top of the engine!

Has anyone else measured their intake temp. or know what it usually runs at ?

My car has been running hot since having the new engine put in (12.5:1 compression ratio) and I've just fitted a cooler thermostat to see if that helps.
It starts off running well but as it warms up it looses a bit of power and I'm guessing this is why.

Any ideas ?

 

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Posted: Sat Dec 25, 2004 9:13 am 
Getting Side Ways
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My inlet air temp at the mainfold floats around the 60-70 mark, depends on the temp of the day. you will find it is radiant heat from the bay. a shild would help?

Also to you have a CAI?
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Posted: Sat Dec 25, 2004 10:23 am 
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Mark (IT's) wrote in another thread his inlet air temp was 22deg but he's got two pipes from the front bar to the bottom of the a/box and a vent cut into the front of the a/box. I'd say mine would be the same as yours maybe hotter with my stainless a/box to t/b pipe.
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Posted: Sat Dec 25, 2004 12:33 pm 
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i've done a bit of testing too

http://www.fordmods.com/phpBB2/viewtopi ... +air+temps

 

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Posted: Sat Dec 25, 2004 3:03 pm 
Getting Side Ways
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infact i have been looking at intake mani temps
Not accurate due to the type of senser
Its made up from copper and heat soakes from the mani itself
So the air temp reading is well off.
like you said, it sits about 60-70
But im in the process of sorcing a new, better sencer and go from there.

 

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Posted: Sat Dec 25, 2004 7:12 pm 
Getting Side Ways
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Age: 38

Posts: 1518

Joined: 6th Nov 2004

Gallery: 14 images

Ride: BA XR6 Turbo

Power: 175 rwkw

Location: The Shire, Sydney
NSW, Australia

I did a bit of driving today with the ambient temp in the low to mid 20s, alot of free way driving and generally fast, constant movement and the temp was down to 50 degrees.

I've got the ELGT style snorkel coming to the airbox and the BA intake tube from the airbox back. The pipe from the TB to the airbox is irrelevant in this particular case though as I'm measuring at the airbox.

I might look and fitting a duct under the airbox as well.
Even the airbox was lid itself was almost too hot to leave your hand on when I was testing the other day an it wasn't exactly a super hot day (around 30 degrees)

 

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Posted: Sun Dec 26, 2004 9:54 am 
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Location: Brisbane
QLD, Australia

Problem is the large metal BBM bolted directly to the engine. It picks up both direct and radiated heat very well. The solution seems to be both heat shielding and some air ducting. I bought an inline air blower from a boat shop that I plan to blow air past the BBM. I took the hood lining and most importantly the rear engine bay rubber strip ( in front of the wipers ) off to allow more air to pass from underneath the bonnet. This dropped inlet air temps on testing, but only a few degrees.

Key thing to do as I see it is a phenolic gasket. Phenolic is a high pressure laminate that can withstand high temps (400 degrees ) and has been used to insulate V8 carbs for some time. I am in the process of sourcing some phenolic and then making a custom inlet manifold gasket out of it. I'll keep you all informed, but I feel this will help the BBM crew dramatically, especially on those hot city days when your response becomes very poor due to the heat.

http://www.uniquemotorsports.com/subach ... pacers.htm

I hope to have one in by end of Jan, and I'll keep you all posted. I will write an article on what I did for the good of all the blue boys.

 

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