The Juice Box?
02-18-2005, 08:10 AM
#1
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The Juice Box? What is this and what is it "supposed" to do? They have lots of positive feedback. Don't know whether they're all morons or I am missing something.
The Juice Box
The Juice Box
02-18-2005, 09:22 AM
#3
TECH Senior Member
sounds like it's the same scam that people have been selling to unsuspecting ebay car folks for years... only they put the resistor inside a box this time 
You can make your own juice box too
Radio shack sells cases just like hte one shown for enclosing circuits... get that, print your own label, then bring 2 wires out of it connected to a resistor inside (be sure to glue the lid on so it can't be dsiassembled ... wouldn't want people to know the secret of hp hehe) , then a connected on the end to plug into the IAT wire and done
yup that's what it sounds like it is... just tricks the PCM into seeing lower temps... not going to give you 15-20rwhp ... and if you really want this you can buy a 50 cent resistor from radio shack...
However I would advice against it... backgrond info on why this works on *some* cars
The PCM has several tables that can add or remove timing based on Incoming Air Temp or Engine Coolant Temp (IAT or ECT)
Attached are examples of each... when the IAT is hot ( > 100*) the PCM will start pulling timing , since hot air = less dense than cold air, plus hot air is a warmer intake charge so greater chance of pre-ignition/detonation
These "modules" aka resistors, force the PCM to read a constant temp, the page says you can use ECT or IAT ... ECT is just stupid... too many things in the PCM depend on this value, the IAT sensor is best left as is but if you *really* want to trick it you just need a resistor ...
You can make your own juice box too
Radio shack sells cases just like hte one shown for enclosing circuits... get that, print your own label, then bring 2 wires out of it connected to a resistor inside (be sure to glue the lid on so it can't be dsiassembled ... wouldn't want people to know the secret of hp hehe) , then a connected on the end to plug into the IAT wire and done
Where does it hook up?
You can use your Intake Air Temperature sensor or your Coolant Temperature Sensor
You can use your Intake Air Temperature sensor or your Coolant Temperature Sensor
However I would advice against it... backgrond info on why this works on *some* cars
The PCM has several tables that can add or remove timing based on Incoming Air Temp or Engine Coolant Temp (IAT or ECT)
Attached are examples of each... when the IAT is hot ( > 100*) the PCM will start pulling timing , since hot air = less dense than cold air, plus hot air is a warmer intake charge so greater chance of pre-ignition/detonation
These "modules" aka resistors, force the PCM to read a constant temp, the page says you can use ECT or IAT ... ECT is just stupid... too many things in the PCM depend on this value, the IAT sensor is best left as is but if you *really* want to trick it you just need a resistor ...
