codigo4

Hi, my name is Cody Rients and I am currently a student enrolled at Arizona State University and as part of a class project I am involved in, we are designing a performance hybrid car. Since I am a huge rotorhead and own a RX-7 I choose to use a Renesis Rotary engine as part of my car. To perform analysis of my vehicle it would be extremely helpful if I could obtain a horsepower/torque curve for a stock Renesis engine (even an RX-8 dyno chart would be helpful). If anyone could just e-mail me an excel file or something with the data points for even just the torque curve I would be grateful.

Thanks in advance,

Cody Rients
e-mail: Cody.Rients@asu.edu

raadracer

Cody-
Check out the section "RX-8 Faq" on this forum. There you can find the original RX-8 HP/Torque curve on a graph.

dmp

Two 100% RX8s...same dyno, same day...minutes apart.

cgrx

what's torque ? :p

codigo4

It would be nice if I could find a graph like what is in the FAQ section, except one that has the U.S. models horsepower and not the 250-hp japan engine.

RX8-TX

....data table is based from on dyno. For more info, follow the link to my site.

RX8-TX

A very healthy example!

codigo4

Thanks for the help finding a dyno chart!

Another thing I have been searching for with little luck is envelope dimensions of a Renesis engine (Length x Width X Height)?

robertdot

Since you are sapping us for info, I would like to know what exactly you are doing. I'm really interested in hybrid gas / electric (and pure electric). Are you designing from the ground up or trying to convert an existing vehicle? Are you going to "put" an electric assist on the drive shaft or "put" some in-wheel electric motors on it? GM apparently has some in-wheel motors that are good for ~35 hp each. They had some truck making 70 more HP from putting the motors on the rear wheels. With some regenerative breaking, this would be a great way to add some extra permanent oomph to the RX-8 (esp. since the power is available 100% of the time). The only downside is the extra unsprung weight would really mess with the handling. Sounds like a fun project. You might want to check out the Toyota Volta for inspiration...

Rasputin

Have a look here :

https://www.rx8club.com/showthread.p...g+power+torque

It comes from a SAE tech paper.

codigo4

If some people are interested here some of my teams overall specs outlined in our proposal. My team has 20 people and then we are subdivided intoe body, chassis, electric motor and intenal combustion engine. My focus is on the ICE.

Overall Vehicle Specifications:
Pricing:
MSRP: $15,000 - $20,000
General Info:
Body: Two-seater Hatchback
Doors: 3
Seating Capacity: 2
Power Train:
Drive Train/Layout: Front-mid engine/Rear wheel drive
Power Train: Parallel hybrid
Electric Motor:
Electric Motor (hp): 19
Electric Motor (lb.-ft.): 100
Engine Type: RENESIS 2-rotor rotary
Displacement: 1.3 Liter
Compression Ratio: 10.0:1
Horsepower: 238 Hp @ 8500 RPM
Torque: 159 lb.-ft. @ 5500 RPM
Max. Engine Speed: 9000 RPM
0-60: 4.3 sec.
¼ mile: 12.6 sec.
Transmission: 5-speed manual
Top Speed: 160 mph
Final Gear Ratio: 4.100
Differential: Limited-Slip
EPA City: 26 MPG
EPA Hwy: 32 MPG
Safety:
Airbag:
Brakes: Front: Disk
Rear: Disk
Dimensions:
Head Room: 940 mm
Leg Room: 919 mm
Hip Room: 1,306 mm
Shoulder Room: 1,407 mm
Cargo Space: 1,862 Liters
Specifications:
Wheelbase: 2,413-2,667mm or 95”-105”
Overall Length:
Width: 1,524-1,770mm or 60”-70”
Height: TBD
Curb Weight: 2000lbs.
Weight Distribution Front/Rear: 50/50
Tires/Wheel Size: TBD
Steering Type: Rack and Pinion
Turning Radius: TBD
Steering Ratio: 3.5 turns; lock to lock
Suspension: Front: SLA
Rear: SLA
Fuel Capacity: 12 gallons

robertdot

Electric Motor (hp): 19
Electric Motor (lb.-ft.): 100

I'd take a look at the GM product. Apparently Bridgestone has one as well (PDF attached). GMs are putting out 35 hp each (don't remember the torque rating, and google didn't help me this morning... looks like a reindex).

That would bump your mileage up alot. The electric side just look really anemic compared to existing offerings from Honda (73 HP / 79 ft lbs...okay, not really that bad compared to Honda) and Toyota (67 HP / 295 ft lbs).

army_rx8

hehe why not put 4 of those motors on teh 8 one fo reach wheel:D wonder how much they weigh...hmmm but 35 hp a pop would be nice. wonder how plausible it would be to do. maybe tonight when i got nothign to do i'll check into it:D