Passing IC Water Trough TB?

Bill Z

Donating Member
I was thinking and wanted the opinion of others about this.

The throttle body has a passage in it where the hot water from the radiator was designed to flow. I know, -> stupid idea. But what about passing the intercooler water through there to cool down the TB? The passage is a choke point but with a big enough IC pump, it may help.

Anyone try it yet?
 

QUICK STORM

B.A.M.F. BMW Tech
Re: Passing IC Water Trough TB?

i would think it would make a more difficult setup than already what is stock and to me would be pointless. i don't think it would cool down the TB charge at all. why don't you just spray alky.
 
Re: Passing IC Water Trough TB?

QUICK STORM said:
i would think it would make a more difficult setup than already what is stock and to me would be pointless. i don't think it would cool down the TB charge at all. why don't you just spray alky.

:stupid: I think that would be a little nuts just to cool down the throttle body, because it would screw up the flow of the IC pump, and that would in turn make the IC hotter, and negate the whole desired effect. :2cents:
 

Bill Z

Donating Member
Re: Passing IC Water Trough TB?

My point was to take some of the heat from the TB that gets there through the intake from the engine. It seems that the TB, being made from aluminum, has to live with a bunch of heat that it doesn't need to. The outbound IC water could help to reduce this heat some. As far as complicating the flow, just take the output off the IC and go to the back side of the TB with a small loop. Then from the front of the TB plum back down to the IC pump. Except for the fact that the IC hose could be going over the top off your turbo, the pluming is easy.

I am all spraying alky, cooling the TB is just one more small thing to help.


Not argumentative, just trying to explain.
 

NecroWolf

lost marbles member
Re: Passing IC Water Trough TB?

might be better off to put one of the spacers between the upper and lower intake to block the heat.
 

QUICK STORM

B.A.M.F. BMW Tech
Re: Passing IC Water Trough TB?

NecroWolf said:
might be better off to put one of the spacers between the upper and lower intake to block the heat.

you can tap the hole and use a plug, this is what i did as part of the egr mod
 

dgoodhue

BuSTeD 4.3
Re: Passing IC Water Trough TB?

The TB coolant is only a 3/8" hose so it would create restriction for coolant flow.
 

jwaller

Evil Genius/SyTy Guru
Re: Passing IC Water Trough TB?

I dont think a parcel of air stays in the TB long enough for it do any good, not to mention the restriction in flow and the PITA it would be to hook it up.
besides the TB is totally smooth inside and not very conductive to heat transfer to the air.
 

gmcturbo

Active member
Re: Passing IC Water Trough TB?

actually the passage is there to prevent throttle blade icing. its meant to heat it up.
 

Bill Z

Donating Member
Re: Passing IC Water Trough TB?

I've been having problems with heat expanding the TB to the point that I start loosing vacuum at idle. Mostly due to age and ware on the TB but when cool, I don't experance it so much. I thought by keeping the TB cooler, the heat expansion would be reduced keeping my vacuum at max for a high milage TB. The IC pump I have has enough volume to overcome the choak point that the TB causes. It may improve cooling by slowing the water for heat transfer (maybe).
 

DynaGlide

Ton-Eighty
Re: Passing IC Water Trough TB?

kreepinty said:
actually the passage is there to prevent throttle blade icing. its meant to heat it up.

Yea. They had problems with the throttle blade icing due to extremely low pressure areas created from just the wrong angles, and allowing the water in the air to condense and freeze on the throttle blade. Warm engine coolant was pumped through the TB to keep it warmer and help prevent this condition.
 
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