Benefits of bypassing throttle body heater

by **Ragtop George** » Fri Jul 18, 2003 9:03 am

A small mod which Jim@FA mentioned last year, and which I have seen a couple of other places, is to bypass the antifreeze circulation through the throttle body. This makes the intake air somewhat cooler. I did this a couple of days ago, and it does make a difference in throttle response, with a bit more full throttle power (though this is minimal). For the 2 bucks it costs for the hose barb fitting, and 15 minutes of time, it is a worthwhile mod.

George

by **Hsakuragi** » Fri Jul 18, 2003 9:07 am

pics?

by **Fletch** » Fri Jul 18, 2003 9:44 am

Does the benefit of increased response outwiegh the benefit of heating the intake air (or whatever the design intent was) for cold starts in cold climates?

I was thinking of doing it too, because it's easy and cheap.

by **Ragtop George** » Fri Jul 18, 2003 10:08 am

Sorry, I don't have pics. Its not much to see, just unplug the two little hoses carrying coolant to the throttle body and join them together with a hose barb coupler (I used 3/8", but it is a little big, 1/4" is too small).

If it causes cold weather problems, I will just put it back to stock for winter.

George

by **Fletch** » Fri Jul 18, 2003 11:44 am

I asked around work and apparently one of the reasons for the engine coolant routed through throttle body is to keep the plate/butterfly valve/whatever it's called from icing up and sticking.

by **TXSolaraSLE** » Fri Jul 18, 2003 12:32 pm

so it sounds like this kind of mod is ok for us texans who only see snow on tv right? i'm down if somebody can post pics...just to make sure I don't mess things up!

by **Yanks0114** » Fri Jul 18, 2003 1:44 pm

A lot of muscle car guys do a TB bypass. Its kinda like a free mod. You won't see a ton of gains, but it is possible that you may experience a few benefits

by **SC V6** » Sat Jul 19, 2003 9:06 am

I heard that it is also there to cool some things in the engine also.. true?

by **onefiend** » Sat Jul 19, 2003 3:27 pm

Please post pictures...anyone. This sounds kinda cool and I might be interested in doing this.

Website · by **Turbosolara** » Sun Jul 20, 2003 3:11 am

i had discussed about this with my friend who know cars very well. He thinks this mod will not make any gain because the throttle body hardly absorb the heat from the coolant. Also, the air flow into the throttle body so fast that the temperature of throttle body will not effect the performance. any counter arguments?

by **808Camry** » Sun Jul 20, 2003 1:27 pm

I agree the air is moving too fast to be greatly affected by it but any heat reduction to the throttle body only could help IMO.

Hey George were the two hoses you took out the ones on the lower left side of the throttle body?

by **Ragtop George** » Sun Jul 20, 2003 10:31 pm

One as you stand by the drivers front corner of the car, one hose is on the left and one is on the right of the throttle body. There is another hose that goes to the IAC, a box with two hoses coming out of it. Don't mess with that one. If in doubt, when you take the hose off, coolant should come out. I will try to get some pics with the digital camera at work in the next couple of days. I can then email them to anybody who wants them.

George

by **Ragtop George** » Sun Jul 20, 2003 10:32 pm

Sorry, that didn't start right. Should be....

As you stand by the drivers.......

George

by **808Camry** » Sun Jul 20, 2003 11:43 pm

Ragtop George wrote:One as you stand by the drivers front corner of the car, one hose is on the left and one is on the right of the throttle body. There is another hose that goes to the IAC, a box with two hoses coming out of it. Don't mess with that one. If in doubt, when you take the hose off, coolant should come out. I will try to get some pics with the digital camera at work in the next couple of days. I can then email them to anybody who wants them.

George

rnl_127@yahoo.com

Could you email me?

by **Fletch** » Wed Aug 13, 2003 4:39 pm

I did this a few days ago. 5/16" barb coupler is the perfect size. Not a lot of room to work in that area...

I heard another purpose of the coolant routed through the throttle body is to help keep idle speed steady. I guess somebody that did this with a Honda had problems with their idle jumping around, when they changed it back the problem was corrected.

I can't notice any difference in performance. I plan on changing it back to stock around Thanksgiving and I'll probably leave it that way.

Benefits of bypassing throttle body heater

Benefits of bypassing throttle body heater

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