I have an early 99 and the idm number on the sticker is 110. Is the 73.2 resistor the one I need and where can I find one? thanks guys

 

You need the 75k ohm resistor (73.2k is for the 120v IDM). I had a couple, but they are spoken for. Someone may offer one up or you can get them here: Digi-Key - PPC75.0KXCT-ND (Vishay/BC Components - SFR16S0007502FR500) Minimum quantity to order is 5, but they are cheap.

 

CHRIS pm me and i will send you out 2

 

hey thanks guys

 

leekngen,
when you say WOW in your sig are you refering to how much you gained from the IDM Mod? I am still kicking the idea around especially since I am getting a DP tuner next, but am scared because I suck at soldering. Also is the idle really that much rougher?

 

Yea, mueckster is sending me one too. These guys are awesome aren't they?
I'll be modding mine too, let me know if you have any questions, I'll help best I can

 

DAN yes it wae like night and day for me, i think it's a must do for the early 99 no problems with idel.just do it and let jody know when you order you'r dp

 

What does the idm mod do?
Why is it so much better on the early 99?
Can I do this with my superchips tuner?

 

I got the DP Tuner and i,m wondering now if I have to send my chip back to get reburned if I do my IDM??? Prolly already asked this before but I can't remember..

 

Im with rat49, what advantage does this mod give us?
is it a boost in power? throttle response?

 

My short answer is yes it's a good idea to have the chip tune adjusted to cancel out the additional advance in injection timing that's caused by the IDM mod and the same answer applies for the additional advance in injection timing that's caused by an HPOP mod!

Before I continue with my long answer read the clip below...



...and note the part about ...when timing is advanced too far combustion pressure soars! A chip tune, the IDM mod, and an HPOP mod each independently advances the injection timing and using these mods with a standard chip tune which has an injection timing curve that doesn't take the mods into account might push the timing advance to the limit and cause excessive CP=Cylinder Pressure! As I'll discuss below the GTP38R mod increases BP which is an additional independent mechanism for increasing CP!

The CP~{(KEg)(Ng)}/{CV} where KEg=kinetic ENERGY of each gas molecule, Ng=Number of gas molecules, and CV=Cylinder Volume. The KEg comes from the fuel's chemical ENERGY that's released during combustion so the KEg depends on the mass and atomization of fuel per injection and the Ng depends on the BP. In words this equation says that the CP is proportional to the total ENERGY density in the cylinder.

1) For a given injection timing increasing the BP and or increasing the mass and atomization of fuel per injection increases the peak value of KEg for a given value of CV and this increases the maximum value of CP.

2) For a given BP and a given mass and atomization of fuel per injection advancing the injection timing causes the peak value of KEg to occur at a smaller value of CV and this increases the maximum value of CP.

The IDM mod and/or an HPOP mod alone or in combination advance the injection timing and increase the mass and atomization of fuel per injection and when these mods are used with a chip that's independently increasing the mass of fuel per injection and advancing the injection timing the potential exists for excessive CP.

I discussed the mechanism by which the IDM mod advances the injection timing in posts #77 & #78 here... https://www.ford-trucks.com/forums/7...it-work-6.html

 

Fantastic answer. I think I will be leaving my IDM alone.
Reps to you!