Replacing your Crankshaft pulley with a smaller one

[Viper88]

Do you really gain RWH with this mod?
Or do you just screw up all your electrical or power steering

[pokeyl]

Yes and Yes

[JonB ~ PartsRack]

Yes and Yes

[Viper88]

So did you or not ??

[pokeyl]

OK, if you are on a race track and need 10/10s performance, it is a good deal. I you drive your car on the street (in town) at idle your A/C, alt, water pump, all turn to slow to do a good job. Dodge picked that size to make our cars happy at stop lights. You can do it, you will free up 10-12 HP to the wheels. Unless you need that little push to win, I would not do it. I hope this helps.

[Steve M]

OK, if you are on a race track and need 10/10s performance, it is a good deal. I you drive your car on the street (in town) at idle your A/C, alt, water pump, all turn to slow to do a good job. Dodge picked that size to make our cars happy at stop lights. You can do it, you will free up 10-12 HP to the wheels. Unless you need that little push to win, I would not do it. I hope this helps.

Or unless you can bump up your idle RPMs.

[Back In Black]

I've had the small pulley on my Gen4 for years and have not had any electrical, power steering, A/C, or any other kind of issue.

[Viper88]

Makes sense thank you

[Old School]

I've had a small pulley on my Gen3 for 20k miles, no issues.

[SNKEBIT]

I've had the small pulley on my Gen4 for years and have not had any electrical, power steering, A/C, or any other kind of issue.

What he said^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

[Steve M]

For the Gen 4, the smaller crank pulley apparently helps keep the water pump cavitation under control at high RPMs. Or at least so I read somewhere once upon a time on the internet.

[Viper.954]

I've had one on my Gen 5 with no issues. It's not a daily driver either. I'm never stuck in traffic with it.

[MDACR]

Mine's been on over a year. No problems what so ever. Not a huge seat of the pants difference but I could tell

[Viper Specialty]

I can only condone this modification if you couple it with an idle speed alteration at higher then normal engine temps, that will (counterintuitively) improve water pump flow rate, A/C flow rate, and Power Steering flow. Especially on the Gen3 with its hydraulic fan, it needs the PS flow at low engine speeds to keep the fan output constant. Without enough flow, when the valve opens up, the pressure will drop off before reaching desired fan speed. It takes about 1000 RPM even on the stock pulleys to supply full tilt fan power at stock limitations. All the same arguments can be made for the other systems as well. When AC is running full tilt, do you ever see that compressor stop on a hot day? Or the fan slow down...? Nope. They are using every bit of available speed as it is, I would not be reducing that without raising idle speeds to counter in those situations.