idle control valve heating bypass
Thread Starter
EG6
Joined: Jan 2005
Posts: 1,159
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idle control valve heating bypass
Well, I am getting ready to buy a SKunk 2 Pro series IM, and a hondata IM gasket. My question is, Can I bypass the coolant going into my IACV!? I have done plenty of throttle body bypasses, but I was jsut wodnering if I could do a Bypass on the IACV. According to Hondata you can, why does honda heat up the IACV, is it just so it doesn't freeze in cold weather!? I want to bypass my TB and the IACV, and install the Hondata IM with my SKunk 2 Pro IM. Lemme know ur thoughts on the situation.
The graph above shows the results of installing the Heatshield gasket and bypassing the throttle body heating and idle control valve heating. If you examine a Type R intake manifold you will find that most sources of water heating are removed. Further temperature drops are possible when in addition the interior heating hose is blocked. What the graph shows, is that as you open the throttle, the intake temperature drops slowly as it cools the intake. When you descend a hill with the throttle closed or drive around town on a light throttle the temperature climbs quickly. It takes a good 15-20 seconds for the temperature to drop again when you open the throttle. So if you start your 1/4 mile drag with a hot intake manifold - you are only starting to develop maximum power near the end of the run when the intake has been cooled. The Heatshield gasket kit gives you 4-5% more power immediately by lowering the intake temperature.
The graph above shows the results of installing the Heatshield gasket and bypassing the throttle body heating and idle control valve heating. If you examine a Type R intake manifold you will find that most sources of water heating are removed. Further temperature drops are possible when in addition the interior heating hose is blocked. What the graph shows, is that as you open the throttle, the intake temperature drops slowly as it cools the intake. When you descend a hill with the throttle closed or drive around town on a light throttle the temperature climbs quickly. It takes a good 15-20 seconds for the temperature to drop again when you open the throttle. So if you start your 1/4 mile drag with a hot intake manifold - you are only starting to develop maximum power near the end of the run when the intake has been cooled. The Heatshield gasket kit gives you 4-5% more power immediately by lowering the intake temperature.
Member
Joined: Aug 2006
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honda warms the intake charge to bring it closer to optimal combustion temp and a warmer charge is less dense allowing less air to go into your cylinder... honda did this to make better gas milage...
Go ahead and bypass the coolant it will give you a colder and thus denser charge... denser charge meaning more horsepower
note - you may find that your car may not idle perfectly... but it will give you a few more ponies in the top end...
Go ahead and bypass the coolant it will give you a colder and thus denser charge... denser charge meaning more horsepower
note - you may find that your car may not idle perfectly... but it will give you a few more ponies in the top end...
Thread Starter
EG6
Joined: Jan 2005
Posts: 1,159
Likes: 0
Yea, I did it about 3 weeks ago, and it doesn't idle right. It idles kinda high until it has been running for a while. I bypassed the IACV and the TB. You can tell alot on those cooler night how much the difference makes. I am about to go turbo in a month or so, and when U change to the JG intake manifold, I am going to change out my IACV too.