Cooling down the throttle body!!! Increase HP's
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Senior User
Joined: Jul 2002
Posts: 137
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From: Gilbert USA
Cooling down the throttle body!!! Increase HP's
Have a bronco with a 302 EFI, The throttle body has a coolant ling running to the bottom of it. This line is for colder weather like really cold, to heat the engine up faster. Well i put a temp gauge to the line and it was really really hot almost 200 degress running to the throttle body so i took it off put a cap over the nipple to the body and "T" the hose back into the coolant system with no problem. Truck ran a little cooler but performed really well with out that extra heat running to it was really impressed. Also was reading in a mustang mag that you can thermal coat the manifold and lower the temperatures up to 15 degress. I would say from just doing this little project i maybe gained 8hp "maybe". Throttle response is better and I noticed my pinging is gone, too much heat on the motor. 
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Joined: Jun 2002
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From: belle chasse usa
Cooling down the throttle body!!! Increase HP's
[updated:LAST EDITED ON 05-Aug-02 AT 08:29 PM (EST)]hi, i have a 95 bronco 302 that has almost the same set up except it is located on the side was thinking about doing it also. how many others have done the same and did they suffer any effects from long term usage? i live in belle chasse la and i definatly dont need the heat. thanks for any reasonable response.
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Joined: Jul 2001
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From: Clearwater USA
Cooling down the throttle body!!! Increase HP's
I did this over a year ago and have not suffered any ill effects. The truck runs great no problems from this mod. Hope this helps and Good Luck,
Rick
86 302 EFI, bored 60 over, AOD,
Headman Headers, Flowmaster 40 series,
2 inch dual exhaust, MSD ignition
Rick
86 302 EFI, bored 60 over, AOD,
Headman Headers, Flowmaster 40 series,
2 inch dual exhaust, MSD ignition
Senior User
Joined: Jul 2001
Posts: 237
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From: Clearwater USA
Cooling down the throttle body!!! Increase HP's
TB will not ice up at all. Only a carbureted engine will ice up not fuel injection. It has to do with Bernoulli's principle about fuel and air mixing in the venturi, which is a low-pressure area. Since FI does not have a venturi and does not mix gas till the cylinders you cannot get what is called carbureted icing.
Rick
86 302 EFI, bored 60 over, AOD,
Headman Headers, Flowmaster 40 series,
2 inch dual exhaust, MSD ignition
Rick
86 302 EFI, bored 60 over, AOD,
Headman Headers, Flowmaster 40 series,
2 inch dual exhaust, MSD ignition
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Senior User
Joined: May 2001
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Cooling down the throttle body!!! Increase HP's
Throttle body can ice up in cold climate regions. Condensation from the crankcase can backflow through the manifold, or the PCV valve, and your throttle body sticks. OBDII equipped vehicles are worst offenders.
You warm weather guys are pretty safe. I'm in Michigan and deleted the TB coolant with no ill effects.
You warm weather guys are pretty safe. I'm in Michigan and deleted the TB coolant with no ill effects.
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Joined: Jun 2002
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From: Salt Lake
Cooling down the throttle body!!! Increase HP's
Does the 351 have this too? I have a 92 that is kind of anemic and could use any help I could find for it. Also I am in Utah, is this easy to reverse for winter driving? Some kind of shut off valve would be ultimate!
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From: Gilbert USA
Cooling down the throttle body!!! Increase HP's
Yah on mine its a line coming from the bottom you cant miss it. I just "T'd" it off back into the coolant system made a nice improvment nothing huge though. but it does help out a little. and since living in AZ doesnt really matter i dont need to heat up the throttle body at all and if i need to its easy to put back in with no problem. Good luck with your mods guys.
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Senior User
Joined: Jul 2002
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From: Gilbert USA
Cooling down the throttle body!!! Increase HP's
Looking at your throttle body its on the left bottom side and has a brass fitting on it and a hose with a small clamp will be there. there is only four hoses to the whole throttle body. Two vacum lines on the right side then on the bottom is the coolant line i found that out with i took it off and pissed hot coolant on me i also ordered a BKK throttle body twin 61mm and i'm gonna have the manifold port matched if you need more info just lemme know i'll post the pics on what i did.
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Joined: May 2002
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Cooling down the throttle body!!! Increase HP's
[updated:LAST EDITED ON 07-Aug-02 AT 01:39 PM (EST)]so how exactly did you do this mod it sounds like something that is easy and beneficial so i would like to give it a try. What all do I need to do it. you can e-mail me at Brncomtb(No Email Addresses In Posts!)
JON
JON
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Joined: Jul 2002
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From: Bend,OR
Cooling down the throttle body!!! Increase HP's
Id like to know as well, have you installed the new throttle body yet. I was looking into one as well but wasnt sure if the computer would like it much. If you could send me some pics id appreciate it.
Travis.Lowe@premera.com
Later
Travis.Lowe@premera.com
Later
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Joined: Oct 2001
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Cooling down the throttle body!!! Increase HP's
There are actually 2 lines running to the throttle body. One goes from the top to the radiator, and the other is the source of coolant from the engine somewhere. Simply remove both lines, and connect them together with a plastic fitting.