alright i think about every newer car has this and i know the s2k does. but on my car (97 amaro 28) you can bypass the hot coolant that flows through the bottom of the throttle body and it gives you 8 hp to the ground, dyno tested(this is needed for the really cold states so that when the throttle body flap freezes to the throttle body the hot coolant can melt it) which is useless in a hot state like floida, and the hot coolant heats up the air which gives you less horsepower. my friends and i installed a AEM CAI on my friends s2k last night and i saw you could do the bypass on his car, however one of my friends on this site says you lose horsepower...is he wrong or am i wrong because i believe if i bypass the hot coolant from the feeder, bypassing the throttle body and straight to the collector this will take away heated air from the throtte body (i.e. cooler air charge=more hp and torque)? will you gain horsepower from this free mod?

 

How would you lose HP with a cooler intake charge? I don't see how that could happen.

Basically, its a cheap mod that can free up a small amount of HP. I wouldn't recommend it for someone in a cooler climate like us here in Canada... seems like a bad idea to perform this up here.

 

Yes you can bypass the coolant through the TB, and yes it does improve performance. There is also a "1 up" on this, where you can replace the OEM steel intake manifold gasket with an insulative type from Hondata, that also blocks the coolant flow through the throttle body. You can read about it here. Make sure you scroll down to the bottom of the article to read the review.

 

I think you misunderstood the first post. He is not saying that you loose power...

 

[QUOTE]Originally posted by gernby
[B]

I think you misunderstood the first post.

 

[QUOTE]Originally posted by koala
[B]

Are you sure?

 

I don't think the S2000 has a thermowax cold idle speed valve to boost cold weather startup like is present on so many previous Honda's I've owned. Therefore, there is one less reason to have coolant going through your throttle body.

The remaining reason for the coolant to flow through the throttle is to make sure there is not "icing" under the right dewpoint conditions which could make the throttle valve stick open.

You do get ice on the oranges from time to time, don't you?

Remember, there is lots of water vapor from the crankcase (blow-by combustion) recirculated through the intake system via the PCV system. If the temperature of the intake air is less than freezing, you could be manufacturing snow and ice in your intake system.

Please put it back before selling/trading your car. It's a safety issue.

Yes, this modification is very common with Corvette owners. I would expect there is less HP to gain with the S2000.

 

Anyone got instructions on how to do this?

 

[QUOTE]Originally posted by Destiny2002
[B]I don't think the S2000 has a thermowax cold idle speed valve to boost cold weather startup like is present on so many previous Honda's I've owned.

 

For years Honda has used both and EACV and a "Fast Idle Valve". The EACV provided all the idle control necessary for normal operation, but when it's really cold the Fast Idle Valve would provide an additional path for air to bypass the throttle plate. This device has a thermowax chamber that is driven by heat from the coolant. When the coolant warms up, the wax melts (contracts) and the fast idle valve closes. The wax is solid approximately 50