What mods can you do to a prius?

This was a change done between the original THS (Toyota Hybrid System) and the HSD (Hybrid Synergy Drive, originally called THS II) which was what the second Generation Prius is running (starting late 2003 deliveries).

The inverter doubles the voltage (from 208 v minimum) for driving the motor (500 Volt motor) , and then uses a charge pump for regeneration. As the motor is twice the battery voltage, regneration is advantagous down to 7 mph.

The 12 V battery is far too small to accept any regeneration energy, other than by way of a switching power supply (very similar to a Personal Computer power supply) that runs off the hybrid battery.

 

Incorrect dogfriend the chips do not modify the emission control system. The good tuners write 100% emissions legal tunes.

The federal law dogfriend mentions is regarding the catalytic converter.

Quit with the gas vehicle talk about simply leaning out the mixture. Diesel tuning is an entirely different application. There is far more to tuning a diesel than increasing timing and leaning the mixture. At least for the good tuners anyway.

Bank's hypertech, edge, and the junk you see in the magazines and ebay are not good tuners. They are bottom of the barrel

 

They need to test and certify to be road legal.

No, it applies to any component of the emission system. The fuel metering system is considered to be part of the emission system on a fuel injected vehicle.

http://www.epa.gov/oms/consumer/warr95fs.txt

I gave you lean burn as an example of what you might "tune" to get max FE. It applies to gas fueled or diesel, but increases NOx on either. Anything that increases combustion temp will increase NOx.

 

Higuys wanted me to inform yall that he has passed not only visual emmisions testing. But OBDII scans as well.

 

Good for him. It still isn't legal to modify the emission control system.

 

Well we can thank global warming for emission systems, oh wait.....

and why would it be "illegal" if still passes the emissions test?
(looking for a non-liberal answer)

 

Actually, you can thank CARB (Calif Air Resources Board) for emission systems. Ever visit LA in the middle of Summer? I recommend the San Fernando Valley for the best example.

Anyway, it would be illegal if the modification is not certified by the EPA.

Back to the original question asked:

The answer: They have to test and certify that the vehicle meets emission standards. They also have to guarantee that the emission control system functions for a certain period of time. So, they cannot allow you to screw around with stuff like FI timing and mixture and ignition timing and still be able to certify and guarantee the emission system.

I don't really care (that much) if you screw around with it, but I'm glad you live in another state.

 

Wether it is Emmisions or speed limits or music, it is hard to reason with folks who want to do what they want to do. They don't WANT to beleive that "You have just not been caught yet" is not the same as "It is legal".

 

Just what every Prius driver needs to cope with the aggresive driver who follows too closely...

Flame Thrower Kit - Single Exhaust Flame Thrower Kit, Dual Exhaust Flame Thrower Kit :mad2:

 

I'm not the emission police, I'm just answering the question that was asked. :madgrin:

 

I've got a hunch that mod isn't legal either. But I approve. :madgrin:

 

No, our trucks have a dual purpose. If I were to tow with my 140hp tune, I would melt my engine, Period. They have to be designed to fulfill both needs. If our trucks were never meant to tow they would come from the factory with a different "tune". I have 5 tunes for my truck and ALL of them make me get better fuel economy and I guarantee all of them would pass emissions.

 

Guess you never studied the multitude of negative effects fossil fuel emmisions have on public health, agriculture, environment, economy, etc.?

 

It doesn't really matter how many purposes you have for your truck with respect to whether "tuning" is legal or not.

 

I already stated that I'm not the emission police, but at the same time, I'm just stating the facts according to my understanding. I think that you are correct that the EV mod could be considered an illegal mod.