GReddy Speed Cut Controller for Toyota

This would be good for those attempting engine mods for more power. (I am not one) Currently you can't dyno for HP as you can't lock a gear ratio, and you can't use top speed to estimate HP as there is a speed limiter.

It would be nice to have some 'real world' measurement to dismiss the many snake oil schemes presented on PriusChat.

 

Just wondering, not trying to be an nice person... but $ per HP, you could squeeze a lot more out of a non-hybrid than you can here. Seeing what you're facing with intake and exhaust, I fear you're going to hit the ceiling very quickly.

For example, there's 20+ HP to be squeezed out of a Dodge Neon with a few bolt-ons that one can find lying around a junk yard, and a little Dremel work. Here's a great article describing the step-by-step process... and note that ECM mods don't happen until after stage 3... Dodge/Plymouth Neon performance upgrades

What exactly do you think you're going to achieve here? Is there really THAT MUCH power to unlock?

 

I have asked many times about changing the 3rd Gen ECU software and either people say it is encrypted code or why would you want to do that... Then the ones that say OMG your warranty will be void. It'll get voided if someone narks, otherwise an ECU can be flashed with factory code before the car has to be seen. That is nothing new and happens with many other vehicles. Another is your going to spin tires. The electric motor has torque limiting. Wonder what potential there is with less torque limiting?
Your right foot is the old school traction control.

Hybrid performance might be a big aftermarket money maker if people start getting serious at modding Hybrids. Who knows what potential may or may not be there. The people that figure it out might be very happy a few years later. Anyone can go buy a fast car. Some can buy a grocery getter and turn it into a awesome track car. Some are happy just driving to work in a bone stock vehicle.

Mike

Mobile on my SGH-i717

 

So your plan is to take out the factory protection for the drive train, and put it back after you ruin it and act innocent?

Great Ethics.

 

Did I say I was planning on that? No I did not

Mike

Mobile on my SGH-i717

 

I quoted someone else?

 

I don't know. Where's that statement above?

Mike

Mobile on my SGH-i717

 

The obvious thing to do is to replace the Prius engine with the similar block from a Corolla. Do whatever they do to step up the power of a Corolla block.

Of course now you've got a car that is not street legal. Ok for the race track, but no way is it going to pass any standard emissions test designed for a Prius.

The rev limiter on the Prius is there to prevent damage to the transmission. So just bypassing the limiter isn't going to be very productive.

Ok, here's what you do: Cram a Lexus 450h power train into a Prius body.

 

Sort of like this kid who added nitrous to the new 5.0 mustang (god i hate those ugly pos's) his mama bought for him, swapped pills at random until he blew the motor up. removed the kit and took it to the dealer to get a new engine under warranty. and he did get a free engine. i wonder if ford ever figured that one out...

 

Don't forget to add one of those big coffee-can buzz-mufflers. Those make you go really fast.

 

If by "modding" you mean adding HID lights and plastic bits of bodywork, yes. But if you're talking about proper stage 2 / 3 mods, it's not something "anyone" can do. As I was attempting to tell Jimbo, some folks do simulation and/or calculation before so much as turning a bolt... and are able to do crazy things like crank 400+ hp out of a wheezy little engine without blowing it up.

I understand your intent, but like trying to mod a lawnmower engine, there's only so much you can hope to gain... and you'll still be left with a slow lawnmower. Have fun wrenching, just don't tie your hopes to any land speed records. I've met some folks that have worked on land speed machines, and they're invariably the folks with piles of engineering texts on their desk, sweating over gear ratios, flow rates, turbulence, rotational mass, etc.

 

The simplest way to get an extra 35 HP from a Prius would be a Corolla/Matrix engine.
Toyota ZR engine - Wikipedia, the free encyclopedia

 

Warranties are for whimps. I avoid cars with them. It's like signing a prenup before getting married. If you're so obsessed with failure, you're going to end up failing somehow.

 

Sure it does!
Toyota NZ engine - Wikipedia, the free encyclopedia There is 31 HP right there, and now you have a stock Echo/Yaris engine. Many folks know how to hop up the Echo/Yaris.