1st E-Supercharged Prius Build, WIP/doesn't work......

That dyno sheet is very strange. Did you happen to see if the HV battery drained at the same time the throttle started closing? Or notice the engine's RPM changing?

 

The throttle closing may be normal.

From the published torque curves there is something unusual happening about 3700RPM. Maybe the valve timing is changing and the throttle has to be reduced to avoid knock. Without ejecting the inlet charge for Atkinson operation the compression would be 13:1.

Scangauge can monitor MG1 torque - I don't know if Torque can.

kevin

 

Any updates?

 

So I guess we are still stuck at zero performance increase possible for the Prius...damn.

One last thought...has anyone considered Nitrous? Perhaps a 25 shot of NOS would be worth trying?

 

It may have been done before...Although he's seeing no increase in HP buyt 50+ torque with it on the dyno sheet? That's still an improvement!

 

I don't know... If a portion of the extra torque generated goes into MG1, who's to say that'll improve the output of MG2 and whatever the inverter can give to it? My thinking is that under full throttle with NOS or an SC, the added ICE output will end up with the computer sending more amps from MG1 to MG2 and less amps from the battery, right? MG2 must be capped at something.

It might reduce battery consumption over a period of time compared to stock when goosing it, but would it really shave a second off the 0-60? That is if it gets moving.

 

This thread is awesome! I hope you guys figure out how to increase power

 

Did you leave the throttle body after the electric supercharger? i have to read that the Toyota 2GRFE motor brake boosters do not want to see boost, shuts down like yours. Some Toyotas like the 2ZZFE and 1NZFE brake boosters can handle the boost. Wonder if you could move the throttle to before the boost if it would help?

 

hi I have read with interest your methods of developing power, I also have been looking for an edge . I decided to modify the in let valve shape . To create a part OTTO cycle by closing the valves early and using water injection and 98 octane Note only 4 of the 8 inlet valves are shaped . this create a slow exit of A/F back into the manifold

 

Interesting....... how did you accomplish this?


iPhone ?

 

Alright, you can't just say that and not give us more details! Did you already do this? Just planned? What is the water injection for? Do you think 98 octane is going to be enough for the compression along with water injection? What kind of power might you see?

I'm still toying with the idea of a small nitrous system.

 

I'm curious if you tried running it without the 12 to 24v (nominal) converter connected? In other words make a run without the turbo battery connected to the 12v system. I understand the 12v system is limited to 100a-125a and perhaps it wasn't able to keep up with the demand and caused little "gremlins" instead.
Thanks for documenting your work!

 

Hi I have had an 2006 I tech that I modified the in let cam shape and continued on to do all 8 lobes .The car ran real sharp with more torque in the low revs so much that i had to replace tyres with very soft rubber ( Yokahama Cdrive) to stop the "dam " traction go/stop/go stop that plagues this model. So Now I have a 2009 I tech. (1800cc) . I have re ground the trailing edge of the 4 cam lobes on the 1800cc (in the car mod) see pictures of the change very slight drop off the back edge . I used a Dremal to reshape the lobes and lapped the finish up a bit . 14523 shows the 2 inlet lobes front unmodified . So it has created more (off the line) performance . but you would need to see dyno charts to confirm this . MG1 is going to balance the power, but to create more torque at a lower MG1 motor speed ,where the torque can be held , its going to be the only solution to our problem of driving it backwards. still getting 5.2 L/100km better tyres 17" Subaru wheels . find my other articles for this subject.

 

I have been going through the CD maintenance repair for the invert er and found an interesting sensor . The invert er MG ECU has a barometric sensor (on the printed circuit board) . this sensor is used to check the MAP air pressure sensor . it has an alarm code for a fault P0069-273 May be this is seeing a difference between the 2 sensors and closing the throttle .?

 

Well... apparently it’s now for sale.