[bombfactory]

Speaking of lower intake temps, I think I recently read on another thread here that our throttle bodies are 'heated' with coolant from the engine as an aid during ultra cold weather operation - this was news to me! Living in SoCal, my car most likely will never see freezing weather, and I want the coolest intake temps I can get. I've done the airbox mod and K&N. Anyone know if there anything gained from bypassing this throttle body warm-up system, and if so, is there a DIY on how to do it?

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[Lim Yong]

I did it to my car......Had to cut the elbows and then fited a straight tube.

Not sure if it made a difference as the engine bay is pretty warm anyway.....Now if I can circulate

water from the winshield washer to the throttle body...Heh...Never mind

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[tamathumper]

Better yet, you could duct tape a piece of flexible dryer hose over the center vents in the dash, crank up the A/C, and run it forward out the window to the air box.

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[banditsc]

All you have to do is pull the two hoses and connect them together with a coupler, then throw some rubber caps on the ports on the TB. All the parts can be found at your local auto parts store.

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[pmason]

I did it on my race car, just out a cap off the feed from the back of the block and then just put in a plug in the other one and wrapped it under the tank.

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[ds968]

is that feature activated ONLY by very cold / freezing temps that some sensor picks up, or is it a constant warming of the intake air by default ? if it's the later, I definitely want to bypass that as well.

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[DaveN]

You would think it would have a bypass after the car warms up but I have a felling it is always on. After the car is warm why would you want to keep the intake temps up? That's the wrong kind of thinking, no?

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[tamathumper]

To prevent icing.

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[MB968]

Could always put a flow valve in one of the lines. That way if you ever go to the mountains, or cold country you have an easy way to activate flow again without breaking into the coolant system.

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[Cloud9...68]

This is news to me as well. Other than in very cold conditions, why on earth would you want your intake air heated?

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[SILVY968]

I wonder if you ran a small rad. in the front of the car and installed a 12VDC water pump with resevoir to pump cool water around the TB. Cooler air = denser charge = more power, no?

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[bombfactory]

That's not a bad idea! Flash, care to burst our bubble here, what do you think?

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[flash]

lol - i've had that thing bypassed for 9 years now. has nobody noticed in any of the pics i put up?



as for the cooling idea, it can be done, but the effects will be minimal. remember that they only need to keep the insides of the throttle body from icing when you first fire it up. that's a lot easier to do than to cool off the intake with essentially ambient temp water.



but have at it

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[Cloud9...68]

Could someone snap picture or post a link showing what this thing is? Thanks.

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[mbardeen]

The air warmer is a thin cavity that's maybe an inch wide or so that runs all the way around the throttle body. The two outermost hoses that hook in to the top of the throttle body carry water from the block, around that cavity, and then back into the T hose leading to the coolant tank.



Sadly I didn't get pics before I put my throttle body back on the intake manifold today.

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[ds968]

How much real difference ( power ) are we talking about with the bypass ? Or is there another benefit to it, even if the power diff is negligible ?

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[mbardeen]

In hot climates, there probably is a real benefit to bypassing this. How much? It's hard to say... a couple horses or so would be my guess.



Other than that it's immediately evident if there's a leak with the bypass. Without it, you might have a damaged seals there that allow coolant to seep into the intake manifold (unlikely due to construction) or out into the engine compartment (somewhat more likely). Even though I am running the bypass, I just replaced the seals on my car because... well.. Just because. They were both well past their use-by date.

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[Lim Yong]

How about water mister for the re-circ tube in between the heater tubes from the washer bottle?

vacuum to draw water to cool mix with the intake air and does not add weigh which defeats the purpose

of this mode, it it does add any power at all.

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[mbardeen]

I think any gains from a "cold" water setup would be negligible. The purpose of this in the first place is to warm up the throttle body and the incoming sub-0 degree air with water at 90 degrees Celsius. There's a large temperature differential there to work with, so raising the incoming air temperature a couple degrees is pretty easy with a small surface area.



What you're thinking of is to try to lower the 20C to 40C incoming air with water that's probably only a couple degrees colder (if at all). If you wanted to run liquid nitrogen lines around the throttle body you might get another couple horses... but the trouble would far outweigh the benefits.

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[flash]

lol - didn't i just say that?



i bypassed it, not in an effort to gain power, but rather only to mitigate heat issues. i live in socal, so i don't have to worry about keeping ice out of anything but my single malt. i noticed no power gains, and doubt they would be even 1hp. unless you could nearly freeze the liquid in there, i doubt you would see any gains.



now, if you want to hook it up to your AC system.......................

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