Hymee gets Supercharged (Part 2)
11-07-2005, 11:59 PM
#1001
Originally Posted by Hymee
I said it was the real world (actual) torque figure measured at the wheels.
I guess the point I was trying to make is to see how easy it is for people to get all excited about a number.
Cheers,
Hymee.
I guess the point I was trying to make is to see how easy it is for people to get all excited about a number.
Cheers,
Hymee.
youwankerteasbastard
beers
lessismoreslowissmothsmothisfast
beers
11-08-2005, 02:40 PM
#1004
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Hmm the further this progresses the more I am glad that my ex broke up with me...so that way I could save for this rather than saving for an engagement ring.....Thanks Hymee
11-08-2005, 03:08 PM
#1005
My spoon is too big
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If the motor was actually putting out 454 lbft then the tranny and rear would have went by now. If you read what he wrote it is pretty clear that it isnt the acutal number the motor is putting out. That test was probably done in 2nd gear where you have the gears multiplying the torque of the motor.
11-08-2005, 03:10 PM
#1006
Originally Posted by Rx7Roadster
If the motor was actually putting out 454 lbft then the tranny and rear would have went by now. If you read what he wrote it is pretty clear that it isnt the acutal number the motor is putting out. That test was probably done in 2nd gear where you have the gears multiplying the torque of the motor.
11-08-2005, 04:35 PM
#1009
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Last edited by Renesis_8; 09-11-2011 at 07:50 AM.
11-08-2005, 06:39 PM
#1016
That looks like a better formulae.
But we can "formulate" all we like. The number I showed is the real number
How about we just look at a comparison between a stock RX-8 power curve, and the power curve the S/C has produced at this stage of its development:
The red line is the stock RX-8 test. The white/blue/yellow lines are twin-screw S/C RX-8 tests. Sorry for the quality, it is a screen capture of a short video I am working on at the moment.
Cheers,
Hymee.
But we can "formulate" all we like. The number I showed is the real number
How about we just look at a comparison between a stock RX-8 power curve, and the power curve the S/C has produced at this stage of its development:
The red line is the stock RX-8 test. The white/blue/yellow lines are twin-screw S/C RX-8 tests. Sorry for the quality, it is a screen capture of a short video I am working on at the moment.
Cheers,
Hymee.
11-08-2005, 07:07 PM
#1021
Here is the video. I meant to remake this video with the clip of the ramp test going for longer, but I lost my movie editing compilation/document due to a power failure last night 
The power failure also affected my "personal supercharger" during my sleep. 
http://www.hymee.com/rx8/videos/PDA_...noSessions.wmv
Cheers,
Hymee.
The power failure also affected my "personal supercharger" during my sleep. http://www.hymee.com/rx8/videos/PDA_...noSessions.wmv
Cheers,
Hymee.
11-08-2005, 07:16 PM
#1022
Originally Posted by therm8
quality aside, that's a nice picture. Looks to be ~30% gain up top, with ~90-100% down low (just counting vertical divisions) 
I won't make a secret out of the fact that we need to do some work "up top". We know that. I hope people can appreciate that and not flame us for it. Working on a project like this you get an appreciation for what goes into this sort of development. There are lots and lots of things that go into it. So many variables. I guess at the end of the day, you guys can benefit from the hard work and lessons learnt along the way.
Cheers,
Hymee.
11-08-2005, 07:32 PM
#1023
Coming thru in waves...
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Yeah, therm8's formula looks right. The final drive and the tranny gear ratios both reduce rpm's and increase torque at the wheel. And then, the driveline losses. The wheel torque divided by 4.444 final drive ratio and divided again by tranny gear raito would be flywheel torque less driveline losses. But, 454 lb-ft wheel torque makes for real low flywheel torque, nomatter what gear it was in, so, let's just set that one aside for now, shall we?
Man, the improved area under the power curve is huge! Sweet!
Man, the improved area under the power curve is huge! Sweet!
