Free Hp...Throttle Body Coolant Bypass Instructions w/ pictures!!!

This is pretty much a FREE MOD. I know all you out there like free engine upgrades. Well this is pretty much an easy DIY that adds some HP, not sure how much. Can guarantee that it does because what you are doing with this MOD is eliminating a coolant line that runs through your TB. Thus lowering the air temp. that runs through. I suggest that you only do this if you live where it stays pretty much warm all year, or that you hook it back up in the winter. I’ve asked around and some people on this site say that the purpose of this is to prevent the Butterfly in the TB from freezing up in the cold season.

There is a color code in the letters...
RED means you just totally disconnect those
BLUE you will connect back together
WHITE is just a guide so you know where you are in the engine bay
Oh yes, don’t do like Donny Don’t and do this mod when your car cooling system is still hot.
That way you won’t spill hot coolant on yourself.
You'll need…
Needle nose pliers to remove the clamps and to pull off the hoses
Coolant in case you spill too much
Pick up some coolant hose from Auto Zone or where ever to make the necessary connections.

I took the intake piping off so it would be easier to work with. Disconnect points A and B. The hose that came from A will connect to point C, and the hose that came from B, you just put aside. Some hoses are easier to connect that others, so switch them around as you like just as long as you get point C to connect with point D

Does the metal pipe at E look familiar? There's a coolant line that runs through there so I just moved it under the intake pipe. F is the main coolant line that runs back to the radiator. D is located just above F, near the block. The next picture illustrates that the best:


Once you get C to connect D using any combination of hose length, then you're pretty much finished. This is what the final layout should look like:


For your reference, the stock flow goes from A to B to E to D. Points A and B are input and output from the throttle body. We simply bypass those by adding the point C and connecting it to E. I have no clue how much power this MOD will provide, but I know it does.

 

or you can just get a different temperature thermostat.

 

i hope you're not in a cold environment.

 

I was wondering what is the point in the coolant running through the TB?? By not running the coolant through it the air that runs into the TB should be cooler. Or am I wrong

 

well in that case, my stuck-open thermostat must be adding like 20 horsepower.

 

True, the cooler the air is that goes through the throttle body, the more HP you make because cooler air is denser. The basic addage is the more air you can cram into an engine the more power it will produce. Colder air is more dense compared to a warmer (fatter) air mass.

Coolant flowing through the throttle body prevents internal icing and possible sticking of the throttle plate. If it never goes below freezing where you reside, go for it. Coolant can (and regularly does) go over 200F, which heats the incoming air, robbing you of a few HP.

 

I owned a 84 Celica GTS that never had anything like that on the TB. Is it something about hondas that the TB freezes up? I live in Delaware, it gets cold enough to snow but I thing the coldest it gets is about 10 degrees, with the wind chill. But besides it keeping the TB warm it served no other purpose?? Everyone has enough sense to know that you don't run a lower temp thermostat in a computer controlled car. Example being some cars can run rough if even the coolant temp sensor is bad, it throws off the signal sent to your fuel injectors from the computer relating in bogus check engine codes. I know about it, you spend so much money fixing crap that isn't even wrong.

 

That's your FITV. Wouldn't this mess up your idle?

 

I just did this to my car after reading this post and searching the internet. The only time it really needs to be connected up, is if you live in Alaska or really cold climates, from what i understand. I doubt my throttle will freeze up with an aftermarket intake taking in all of the engine heat anyway. It may be all in my head, but my car did seem a little faster.

 

:slap: Thats all I can say....:slap::slap::slap: