So I just bought a new 06' lancer ES and I've been looking for ways to increase HP without ripping a whole in my pocketbook. I decided to run a little experiment in regards to temperature difference. This is a before and after of temp difference on the throttlebody when doing the coolant bypass mod.

ALL TEMPERATURE READINGS ARE TAKEN AT THE TOP SURFACE OF THE TB.

Test conditions:
Temps taken using a Kessler ST652 INFRARED THERMOMETER

Outside temp is 70 deg

Temp at TB is 84.5 deg
Car has not been running but has been sitting in the sun for a few hours. So the temp degree difference is expected.




Control conditions:

Car is started and A/C is on high.
Hood is open.
Waited until temp guage on dash got to normal operating range.
Took temp reading with car running at normal operating temp.




Again car is restarted and A/C on high and hood is open.
Waited again until temp guage on dash got to normal operating range.
Temp after DIY coolant bypass test:




As you can see there is a difference of 23 deg. before and after the mod. So does it work? I'd say so. The temperature stayed fairly consistant with the temp of the TB that I took while the car was not running.
Some may debunk these crude test results as a true air temp reading was not taken and the fact that the car was not driven. However, as a simple FREE mod.

This mod does reduce the temp of the incoming air. Since heat is the enemy when it comes to making power I think I'll stick with it.

Jeff.

My DIY CAI.

 

I guess I will be the first to debunk then - without a good reading of the temperatures of the engine under load (i.e. normal driving, highway driving) the results are only valid for idle engine temperatures. However, a 15 minute drive around the block followed by a temperature reading along with 15 minutes at highway speeds should also be useful information.

 

You're abolutely right. Stay tuned for those test results.

Jeff.

 

very very nice.
good work. It's good to see some actual test results on this mod. It was one of the first things i did to my car, and i felt a little improvement afterwards. I'ts good to see it wasn't all in my head

 

wow. I got a coupler just lying around and ive been thinking about doing this. Finally someone has actually tested the difference in temps. Props to you for actually doing it. Oh and just a reminder this is not for those who have to deal with the extreme cold as the throttle body plate can/may freeze up in some occassions

 

external temps

 

i did some tests like this a few months ago... https://www.evolutionm.net/forums/sh...d.php?t=251402 didnt get a before reading after a run but your results are very similar to mine.

 

by the way did anyone notice that you can use the exsisting hoses to do this mod? I just did it without any couplers or extra clamps...
Just used the curved hose and bypassed the throttle body. Then used the other hose to connnect the inlet and outlet lines of the tb together. Took like 5 minutes to do. just a thought.

 

some pics of the mod?? please

 

you dont even need a hose on the TB. just route the longest one back into the head and take the other one out.

 

I just connected it so that nothing finds its way into the hol on the tb. lol. oh and the s curved hose has perfect bends to fit smoothly(no folds in the hose).

 

Picture of the TB hose?

 

the reason for the coolant to run through the TB and warm up the air that is going through is so that all the soot doesnt get stuck inside the intake manifold...

So prepare to clean at least once a year depending how you drive your car...

 

^Well if you remove the breather hoses from the intake then you dont have that problem anymore. Just a thought. Removing the breather lines from the intake also keeps your throttle body and Intake mani much MUCH cleaner..