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UK & Ireland S2000 CommunityDiscussions related to the S2000, its ownership and enthusiasm for it in the UK and Ireland. Including FAQs, and technical questions.
Hi Guys,
I have been toying with the Idea for sometime now about making a throttle body cooler.
KEY: IAT = inlet air temperature
What does it do? Exactly what it sounds like it cools the throttlebody/inlet as much as possible. This gets very hot normally. Even with a hondata Gasket ( all figures with hondata gasket installed ) installed at 70mph im seeng 12 degree's over ambient.
Things get much worse at low speeds from setting off after a period of idling with an
IAT of 66 Degree's after 15 mins at 30MPH IAT is 37 degree's in an ambient of 15.
15 min sample table.
Note after period over 20 mins idling IAT reached 66 degree's
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TABLE showing temperatures with Hondata insulator and coolant lines disconnnected.
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TBA
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TABLE showing temperatures with Hondata insulator and Active TB/Cooler
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TBA
Hows it work?
Well its a small sized radiator mounted in the nose cone with two 120mm high CFM fans arranged in a push pull configration. A pump pushes water through the radiator and then through the throttle body then recirculating back to the pump/reservoir.
A hondata insulating gasket massively reduces the heat conducted from the cylinder head heating the inlet manifold. This system can only work with the insulator
installed. As the cylinder head heating is so great.
Because the air in drawn from outside of the engine bay im hoping
to reduce the differential between ambient and IAT as i dont beleive that
at 70mph with a CAI ( K&N FIPK ) + insulated air pipe, AUT plate and scoop
i should be seeing a 15 degree differential. Also I have found no evidence that
someone has tried this before.
Whats the point?
well lower IAT more advance and due to lower charge temp more power and
am a geek . Hopefully an end to Kangeroo and with some tuning I hope
for more torque and power. This could mean an end to heat saturation.
Whats the status of the TB Cooler, its complete and tested in my kitchen but not
on my car yet. I dont want to rush installation because i want to gather data first.
We have all seen the devices that give upto 15HP ! and lose 10 HP .
I am about to test my setup again with the coolant bypass in place and i expect
to see a drop in IAT and an increase in advance.
Results ( Basic Idle Test )
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OK I tested it on the S2000 Using above equipment going through Throttlebody as described.
The test was an Idling test as this is the most severe test.
Test started at 50 Degree's IAT temp. Due to being able to easly reproduce
this temperature on the bypass and with the cooler i.e turned off.
I was able also to run the tests back to back within 30mins of
each other so ambient temps differences where not a factor.
The purpose of the test is to show that active cooling can either
lower the IAT or reduce the rising temperature rate positive
results will allow further investigation to continue.
After 15 Minutes Results where:
Hondata Gasket with a Coolant bypass 57 Degree's and rising steadly 7 deg increase
Sniper Active ThrottleBody Cooler 50 degree's and holding steady, 0 deg increase
Conclusion
Maintained a 7 Degree advantage and increasing over Hondata plus coolant bypass
experiment was a success. Perhaps with more cooling power it might
have lowered the IAT by overcomming the heating effects of the head instead of
cancelling them out. Im going to try more cooling next however this is very significant step because it shows the idea works.
Sniper.
okay some pics
Overall system ...
The radiator...
The Pump with integrated Reservoir.
And my 12V power supply to simulate the battery.
Shows liquid flow through throttlebody, note entry
point of cooled liquid is tube below round chamber.
This is where the coolant will come out and be routed back to my pump reservoir.
Very simple system tbh.
Pump outlet connects to the lower rad barb upper barb on rad has a hose that
connects to front of throttle body. Near Idle control valve another hose connects
and this goes back to the other pump barb.
Whole lot is mounted in front of the radiator away fron the hot engine bay.
When you say you are measuring inlet air temp, are you measuring the temperature of the airflow through the manifold or the temperature of the manifold itself?
Would be interesting to see the temperatures of the inlet air as it enters the filter and compare that with the inlet air temp inside the manifold.
i would expect that with the volumes of air ingested into the engine, the inlet manfold temperature wouldn't have a huge inpact on intake air flow temperatures but it would be interesting to see.
the reason i say that is that i'm working on a heat exchanger design at work at the moment as an energy saving project. To get noticeable heat transfer, the surface area has to be massive.
11-02-2006, 09:43 AM
My Experiment: An end to heat saturation?
. Hopefully an end to Kangeroo and with some tuning I hope
. 
however this is very significant step because it shows the idea works.
but good on ya fella for having a play. Should as you say help bouncing in traffic at the very least!
