- Jun 4, 2006
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- 1,683
Hi everyone...
Esspecially to Mitsubishi engine owner. Most of us have experience facing the idle problem when turning on the air cond. And alot of use converted to FICD(Fast Idle Control Device) to solve the bad idle problem when turn on the air cond. which is just a solenoid valve. Some are solved, some are still not solved.
Some are solved with FICD connected to the manifold and bleeder outlet of the rocker cover having hoses flying across the engine bay.
Here I'd like to share something with everyone.
KNOWING OUR THROTTLE BODY
Image above shows how our stock throttlebody looks like with the ISC(Idle Stepper Controller) removed.
Above shows some holes on the throttle body which helps in our idling with/without aircond.
SOME BASIC THEORY
Here is what happen when we turn on our air cond. The magnetic clutch of the compressor is activated and become a load to the crank pulley. In order to overcome the extra load, the ISC opens the valve and allow extra air enters the engine via intake manifold. Which is why, U'll notice the rpm goes up a little when the AC compressor kicks in...
After knowing the ports and function of the throttle body, here we go... Converting our stock TB into a racing TB.
Get the ISC mount removed completely from the TB. There are 5 screws(For Japanese model or Local DOHC n V6 Model) to be removed.
*due to the lock tight applied during the fabrication stage, u may need to open it with an impact screw driver.
After removing the water passage and the ISC mount, this is what U'll see.
Here is the drawing I did for the block off plate. The top one is to be fabricate if u are planning to place ur FICD somehere else.
The bottom drawing is what I have. The 2 extra holes is for the FICD as a replacement of ISC.
And here's the result fabricated plate. I used a 6mm because there's alot of wastage and extras at my office.
If you are doing what I did, the second drawing, U may opt for any of the following method.
-Weld 6mm stainless steel/steel hose
-Look for in-out 1/4' male hose adaptor with sockets
-Any other connection u may think off
And here is what I have... I have the second choice.
And finally, here I present
MY 60mm Racing TB, the RESULT OF 2 SKIPPED LUNCH.
Cheers...:proud::proud::proud::proud:
If anyone knows how to do it for other makes than Mitsubishi engine, Please share it...
Esspecially to Mitsubishi engine owner. Most of us have experience facing the idle problem when turning on the air cond. And alot of use converted to FICD(Fast Idle Control Device) to solve the bad idle problem when turn on the air cond. which is just a solenoid valve. Some are solved, some are still not solved.
Some are solved with FICD connected to the manifold and bleeder outlet of the rocker cover having hoses flying across the engine bay.
Here I'd like to share something with everyone.
KNOWING OUR THROTTLE BODY
Image above shows how our stock throttlebody looks like with the ISC(Idle Stepper Controller) removed.
Above shows some holes on the throttle body which helps in our idling with/without aircond.
SOME BASIC THEORY
Here is what happen when we turn on our air cond. The magnetic clutch of the compressor is activated and become a load to the crank pulley. In order to overcome the extra load, the ISC opens the valve and allow extra air enters the engine via intake manifold. Which is why, U'll notice the rpm goes up a little when the AC compressor kicks in...
After knowing the ports and function of the throttle body, here we go... Converting our stock TB into a racing TB.
Get the ISC mount removed completely from the TB. There are 5 screws(For Japanese model or Local DOHC n V6 Model) to be removed.
*due to the lock tight applied during the fabrication stage, u may need to open it with an impact screw driver.
After removing the water passage and the ISC mount, this is what U'll see.
Here is the drawing I did for the block off plate. The top one is to be fabricate if u are planning to place ur FICD somehere else.
The bottom drawing is what I have. The 2 extra holes is for the FICD as a replacement of ISC.
And here's the result fabricated plate. I used a 6mm because there's alot of wastage and extras at my office.
If you are doing what I did, the second drawing, U may opt for any of the following method.
-Weld 6mm stainless steel/steel hose
-Look for in-out 1/4' male hose adaptor with sockets
-Any other connection u may think off
And here is what I have... I have the second choice.
And finally, here I present
MY 60mm Racing TB, the RESULT OF 2 SKIPPED LUNCH.
Cheers...:proud::proud::proud::proud:
If anyone knows how to do it for other makes than Mitsubishi engine, Please share it...
