Throttle body coolant mod 5-10 WHP gain

[tube]

The throttle body gets pretty hot with all that hot compressed air flowing through it, so I think it would heat any fluid going through it relatively well.

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[goixiz]

Originally Posted by firebox40dash5

Good thought, but a little backwards... the coolant flows through the TB to warm the TB up, not to warm the coolant

was more a joke but it is useful
cooler water from the windshield fluid will theoretically cool the TB down - which is what the initial post was about
warm windshield fluid is a plus especially on those cold mornings

[firebox40dash5]

Originally Posted by tube

The throttle body gets pretty hot with all that hot compressed air flowing through it, so I think it would heat any fluid going through it relatively well.

Ever heard of throttle body icing? High speed air flow cooling the throttle body... It might get warm when you're on boost for a long while, but how often do you do that?

[B00st3dWRX]

this is an old honda trick...it def. lowers intake temps but IDK about 6-10hp @ the wheels

[PolarisSnT]

I didnt buy any fittings to do this mod. I took the hose that takes coolant to the throttle body and plugged in into the nipple that the hose that evacuated coolant was on. You are left with an extra hose that cam off of the car and you do not have to buy any parts.

[ColesSTi]

My friend did this on his STI and he told me no matter what you do, You have to turn it back on in the cold using a "shut on/off valve" because the air is denser and it will build up water molecules inside the throttle body and it could get stuck.

[firebox40dash5]

I have yet to actually hear of someone icing their TB in a Subaru with the coolant hoses removed.

See also post #16.

[06grayrex]

Well I did this mod today...It was really easy. Here is what I did

1) I removed the intercooler
2) Then removed the coolant hoses on the throttle body
3) Then removed the BOV just to get out of the way


4) I went ahead and bought a hose coupler to make things a lot easier than removing one of the coolant hoses and rerouting the other. Here is what I used and it cost $1.97 at Home Depot


5) Connect to two hoses and reused the factory clamps



6) Then I bought a veriaty pack of vaccuum cap (nylon type) because they will not dry rot and actually have a warranty through Auto Zone for $1.99 and plugged the open ports on the Throttle Body.



7)Then I bolted the BOV & IC back on and went for a drive.


Now one could save some money and just reroute the longer coolant line but I found that it was going to be a big pain in the A$$! After I did this I went for a drive and when I got back I felt the Throttle body and it was not hot to the touch. After I drove 45 min to work I felt the Throttle body again and even after that long drive it still was not hot to the touch. I then felt the bypassed line and it was at operating temp of the engine.. Now I don't know if it is the plecebo effect but the car felt more responsive.....

[ride5000]

here's an old thread on a different BBS where i was arguing with idiots (yet again) about the worthiness of this mod:

http://www.clubwrx.net/forums/showth...76#post1301676

of particular interest are the rs25.com references.

[06grayrex]

I know any time one can eliminate a heat sourse from the intake/air charge it always is a good thing. If it had a negative affect then why is everyone trying to keep the IATs and under hood temps down? Its no different from when working on my 74 Challenger you want to block the exhaust gases from heating up the intake charge vea runner under the intake pleanum. I'm sure it will not affect throttle body operation this winter. I would rather have my throttle body cool to the touch than at 180 degrees.

[rkramer]

icing of a intake/carb/throttle body usually isn't a problem unless you are vaporizing fuel (a carb or throttle body fuel injection)... I have never heard of a multiport fuel injection system EVER icing up...

[Uncle Scotty]

I did this one on my '02 and the car felt more responsive and the throttle was easier to modulate when the car was hot.

Next time I have the IC off the '06, I'll take a minute and do it.

[Uncle Scotty]

Originally Posted by rkramer

icing of a intake/carb/throttle body usually isn't a problem unless you are vaporizing fuel (a carb or throttle body fuel injection)... I have never heard of a multiport fuel injection system EVER icing up...

I agree that icing is likely a remote possibility for this kind of application, it may be possible under some conditions such as high altitude operation with conditions favoring icing.

Unlikely......but something the engineers obviously had to think about.

[strohausii]

Originally Posted by rkramer

icing of a intake/carb/throttle body usually isn't a problem unless you are vaporizing fuel (a carb or throttle body fuel injection)... I have never heard of a multiport fuel injection system EVER icing up...

Maybe they started doing this as a knee jerk reaction to the old Audi "Unintended Accelleration" insurance claims. I know thats where the foot on brake/ clutch to start began...

[hoonee46]

Originally Posted by Uncle Scotty

I agree that icing is likely a remote possibility for this kind of application, it may be possible under some conditions such as high altitude operation with conditions favoring icing.

Unlikely......but something the engineers obviously had to think about.

'06s are drive by wire? may cause a $750 problem (TB sensor failure)?? thought I read it on that other thread, follow link and check it out before you go on.

[Snitt]

Originally Posted by Uncle Scotty

I did this one on my '02 and the car felt more responsive and the throttle was easier to modulate when the car was hot.

This. Also, my car has survived two butt-cold Ohio winters without any driveability issues.

[sharkmonkey]

And what they seemed to ignore in the clubwrx thread is that you're pumping engine temperature coolant through the aluminum throttle body, which is directly connected to the aluminum intake, so you heat soak the whole thing with it. I'm definitely going to do it, if I'd known about those lines I would have done it earlier. I wondered why my intake manifold seemed to still be rather warm even after I installed the phenolic spacers...

[firebox40dash5]

Unfortunately, without phenolic spacers, your aluminum intake manifold is also connected to your aluminum heads, which are hot as hell. Obviously, doing both is preferred, but removing the coolant lines is a whole lot easier to do.

[ride5000]

Originally Posted by firebox40dash5

Unfortunately, without phenolic spacers, your aluminum intake manifold is also connected to your aluminum heads, which are hot as hell. Obviously, doing both is preferred, but removing the coolant lines is a whole lot easier to do.

actually the heads are only a few degrees higher than coolant temps... figure mid 200s.

[nab911]

I always wondered why most companies run coolant lines through the TB....

[Sausage]

You guys have fun... while you're at it, throw on a ebay CAi and go street racing though school zones!

[firebox40dash5]

Originally Posted by Sausage

You guys have fun... while you're at it, throw on a ebay CAi and go street racing though school zones!

Did you read any of this thread, or just the first post?

Originally Posted by ride5000

actually the heads are only a few degrees higher than coolant temps... figure mid 200s.

I don't want to stick my hand on it, so I qualify it as 'hot as hell'

Either way, it's all heat that gets conducted to the intake charge.

[ride5000]

Originally Posted by firebox40dash5

I don't want to stick my hand on it, so I qualify it as 'hot as hell'

it's funny you say that.

another of my hobbies is building/modding audio electronics.

a quick and dirty way of determining when a power transformer is running too hot is to place your hand on it.

if you can just barely hold your hand to the core, then that's around 140*F. that's generally a safe max temp for your average transformer.

it's a good rule of thumb (or palm, as the case may be).

obviously you would not be able to hold your hand to a 250*F block/head/etc!

[nhluhr]

ride5000 - I read that clubwrx abortion of a thread and was instantly reminded why I HATE that ****ing site. Trainwrx is a goddamn moron. The fact that his head didn't explode when he typed this ID-10-T self-contradiction proves he isn't worth debating:

Originally Posted by trainwrx

I could lower myself to a grade school level and post insults about you, but it won't help me get my point across.

[Mechie3]

Hmm...I see two ports, one inlet and one outlet with only the TB in between and very little to complicate things. HMM...... Seems to me like you could do a custom "intercooler sprayer" mod...only use an ice filled tank to get some cold water to pump through that and set it up to only pump during boost. Simply pump water in one side and then drain back to the tank. Would that be Auto-x legal for any class? I know that IC sprayers are illegal, but this would almost be like an air to water intercooler.


EDIT: 06grayrex, have you experienced the TB failure they spoke of on clubwrx with the spec v's?