Resistor box plug and play DIY

[MeltMan]

Here's a little writeup to make a true plug and play resistor box for your teg.

Need:
OBD1 distributor side plug (4x2 pin rows) OR Ac subharness (front passenger by the radiator) plug from a teg
Prelude resistor pack
Soldering iron

First off, here's the Prelude OBD1 resistor box with plug: (plug from prelude DOES NOT plug right in a teg)


Here's the dead plug (with the dead plug removed:


And here's what we're wiring up:



So depin the prelude harness and your matching 8 pin oem plug (Sourced from OBD1 dizzy or AC sub harness)
I colored orange and white wires red to match the one red wire in the prelude box. Here's how I staggered the extra +12 wires before soldering:


Those joints were soldered! You MUST do this step, not optional! I then placed heat shrink over the whole bundle:


And repinned the harness plug:





And here's the final plug and play product:

[BlownGsR1001]

1) These are sneaky
2) Nice wiring job. Very clean.
3) Tots doing this...

[97lsteggy]

As always Casey, Good work! Your projects always come out so clean.

[luck4rmkc]

Looks good casey I have high impedance injectors so i didn't need to do this myself. What kind of advantages do you see from the ball and seat injectors as opposed to the saturated?

[theivjackal]

What is the exact purpose of this? Why would you need to add resistors to your fuel injectors? -Aaron

[sgtmillhouse648]

When using low impedence injectors for higher hp builds, it is necessary to beef up the resistance of the injector circuit otherwise you will fry the injector drivers.

[MeltMan]

Originally Posted by luck4rmkc on Apr/16/10

Looks good casey I have high impedance injectors so i didn't need to do this myself. What kind of advantages do you see from the ball and seat injectors as opposed to the saturated?

$MoNEY$

I'm using Evo 8 injectors. They were $100 for 560cc and are modern OEM with a good spray pattern.

[ONE4ONE]

Nice write up.

[luck4rmkc]

Originally Posted by MeltMan on Apr/17/10

Quote: luck4rmkc on Apr/16/10Looks good casey I have high impedance injectors so i didn't need to do this myself. What kind of advantages do you see from the ball and seat injectors as opposed to the saturated?


$MoNEY$

I'm using Evo 8 injectors. They were $100 for 560cc and are modern OEM with a good spray pattern.

ok I feel that... well my wallet feels that cuz it is emptyyyyyyy!!!!! I was thinking I remembered that the ball and seat style injectors were better in some way. Like they had a better spray pattern or were more accurate when tuning but i couldn't remember

[MeltMan]

Here's where I put it. Dont know what that threaded hole was for but it works perfectly for the resistor box.

[Ramirez428]

Good job there Casey. Keeping it plug-n-play as always

[JRutski]

Dangit!!!! Now I have another weeked project!

Nice, as always Casey!

[Antman985]

will be doing this as well! i will post pics of it when its finished =)

[sohc-it07]

hey where did you get the pins and the the little rubber grommets for the pins?

thanks