[Z06] JIM vs. JASON, HALLTECH vs. KATECH - The Ultraleggera power to weight ratio challenge
11-04-2011, 08:43 AM
#1
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Thread Starter
JIM vs. JASON, HALLTECH vs. KATECH - The Ultraleggera power to weight ratio challenge
Jim has challenged me to a weight loss contest for car guys/weigh saving nuts.
The contenders:
Jim Hall's Halltech/Katech Ultraleggera E85-powered Z06
vs
Jason Harding's Katech Track Attack E85-powered Z06
The challenge:
Best power to weight ratio. The car with the best rwhp per lb wins.
The rules:
Weight:
Vehicles will be weighed by both Jason and Jim independently on each of our scale pads. This will be done on the honor system. Fuel level will be subtracted from the equation so it is not a factor. Vehicles will be weighed without driver.
Exclusions:
The following items will be retained so it is not turned into a racecar building contest:
Radio/speakers
Front carpet
Door panels
Dash
All safety equipment (airbags, stock seatbelts, crash absorbing material)
Other items may be added to the exclusion list if both parties agree
Power:
Vehicles will be chassis dyno tested together at a neutral shop on the same day later next year(TBD).
Exclusions:
Turbo/Supercharger
Nitrous
Formula:
weight/rwhp=ratio. Lowest number wins.
This contest will be completely transparent. It's not about who hides their savings from the other competitor. Each of us will post our modifications in this thread as we go along. Neither of us are prepared to turn this into a money spending contest either. Each modification will be carefully analyzed for benefit in dollars per pound. Frivolous gains will be thrown out in favor of the best performing items. Location of the savings is also a factor. Unsprung rotating mass is most preferred, as well as weight savings high on the vehicle to help lower the center of gravity.
Also we may be able to arrange track shootout showing the two cars on a road course.
03/15/12 Edit: Seats are no longer prohibited due to a mutual agreement.
Results on this post:
http://forums.corvetteforum.com/1581414950-post837.html
The contenders:
Jim Hall's Halltech/Katech Ultraleggera E85-powered Z06
vs
Jason Harding's Katech Track Attack E85-powered Z06
The challenge:
Best power to weight ratio. The car with the best rwhp per lb wins.
The rules:
Weight:
Vehicles will be weighed by both Jason and Jim independently on each of our scale pads. This will be done on the honor system. Fuel level will be subtracted from the equation so it is not a factor. Vehicles will be weighed without driver.
Exclusions:
The following items will be retained so it is not turned into a racecar building contest:
Radio/speakers
Front carpet
Door panels
Dash
All safety equipment (airbags, stock seatbelts, crash absorbing material)
Other items may be added to the exclusion list if both parties agree
Power:
Vehicles will be chassis dyno tested together at a neutral shop on the same day later next year(TBD).
Exclusions:
Turbo/Supercharger
Nitrous
Formula:
weight/rwhp=ratio. Lowest number wins.
This contest will be completely transparent. It's not about who hides their savings from the other competitor. Each of us will post our modifications in this thread as we go along. Neither of us are prepared to turn this into a money spending contest either. Each modification will be carefully analyzed for benefit in dollars per pound. Frivolous gains will be thrown out in favor of the best performing items. Location of the savings is also a factor. Unsprung rotating mass is most preferred, as well as weight savings high on the vehicle to help lower the center of gravity.
Also we may be able to arrange track shootout showing the two cars on a road course.
03/15/12 Edit: Seats are no longer prohibited due to a mutual agreement.
Results on this post:
http://forums.corvetteforum.com/1581414950-post837.html
Last edited by Katech_Zach; 07-26-2012 at 09:05 PM.
11-04-2011, 09:57 AM
#3
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St. Jude Donor '09
We are sharing our mods with Jason and visa versa. Katech has one mod coming that will put our cars into the low 2900 lb area. Halltech has one that will razor blade off another 15lbs from the front (not the AC); another 5 lbs from the front engine bay. No gutting.
__________________
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"World Class Performance for your Corvette"
Intake Design and Engineering since 1999
Halltech Systems, LLC
262-510-7600
For service email:
orders@halltechsystems.com
www.halltechsystems.com
11-04-2011, 10:31 AM
#4
Team Owner
I am looking forward to this build. Some good friendly competition benefits everyone 
11-04-2011, 12:17 PM
#5
Melting Slicks
Member Since: Dec 2009
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Will modification costs for special parts, if any, published in this thread as well?
11-04-2011, 12:36 PM
#7
Premium Supporting Vendor
Thread Starter
Jim and I have both agreed to retain our stock seats.
Last edited by Katech_Zach; 11-04-2011 at 12:41 PM.
11-04-2011, 01:53 PM
#8
Premium Supporting Vendor
Thread Starter
Jason's step 1.
I'm currently sandblasting the calipers. I have one left. I have about 1.5-2 hours invested per caliper. That powdercoat does not come off easily.
I'm currently sandblasting the calipers. I have one left. I have about 1.5-2 hours invested per caliper. That powdercoat does not come off easily.
11-04-2011, 02:26 PM
#9
Melting Slicks
"I'm currently sandblasting the calipers. I have one left. I have about 1.5-2 hours invested per caliper. That powdercoat does not come off easily."
Shoulda just used some brake fluid
Cheers, Paul.
Shoulda just used some brake fluid
Cheers, Paul.
11-04-2011, 03:26 PM
#10
You could have changed out the seats and saved a lot more weight.
11-04-2011, 04:42 PM
#12
Very. Very. Very. Very cool.
11-04-2011, 04:52 PM
#13
Le Mans Master
In order for this contest not to get out of hand, I think you need a rule that if something remains present it needs to remain functional (as it camer from the factory).
This would prevent having the radio installed in the dash, but its guts are gone and the wires between the radio and speakers are similarly missing.
This would prevent having the radio installed in the dash, but its guts are gone and the wires between the radio and speakers are similarly missing.
11-04-2011, 05:14 PM
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St. Jude Donor '09
In order for this contest not to get out of hand, I think you need a rule that if something remains present it needs to remain functional (as it camer from the factory).
This would prevent having the radio installed in the dash, but its guts are gone and the wires between the radio and speakers are similarly missing.
This would prevent having the radio installed in the dash, but its guts are gone and the wires between the radio and speakers are similarly missing.
When I was 17, I drilled holes in everything to lighten it up. That is outside of what we are trying to accomplish.
Anything we do for power increase (NA only) and lightening, would be available to the Z06 enthusiast, without a drill.
Conceptually, the Porsche GT2 RS could be considered a model. Check out mods they have provided the Porsche enthusiast. Mind you, most of these mods were done by Halltech and Katech prior to this cars release:
The main focus in building the GT2 RS was weight reduction, because the best way to lap faster is to lose weight. First things to go were the radio and A/C, cutting over 35 pounds; another 22 pounds were eliminated in European-spec cars using seats from the GT3 RS. But the U.S. won't get those; we'll get the seats from the base GT2. Lithium Battery saves 22lbs.
Titanium exhaust shaved 33 pounds; the carbon-fiber hood and fiber fenders reduced weight by 15 pounds; different carpeting and sound deadening, another eight pounds; lithium battery, 33 pounds. Ceramic brakes, custom suspension, polycarbonate rear windows (Euro-spec only) dropped 33 pounds; single-mass flywheel, 17 pounds; synthetic intake manifold, six pounds. What this all amounts to is a driving weight under 3050 pounds- less than five pounds per horsepower. The only production vehicle we've gotten our hands on with a better to weight-to-power ratio is the Bugatti Veyron at 4.6.
Titanium exhaust shaved 33 pounds; the carbon-fiber hood and fiber fenders reduced weight by 15 pounds; different carpeting and sound deadening, another eight pounds; lithium battery, 33 pounds. Ceramic brakes, custom suspension, polycarbonate rear windows (Euro-spec only) dropped 33 pounds; single-mass flywheel, 17 pounds; synthetic intake manifold, six pounds. What this all amounts to is a driving weight under 3050 pounds- less than five pounds per horsepower. The only production vehicle we've gotten our hands on with a better to weight-to-power ratio is the Bugatti Veyron at 4.6.
Notice that both Jason's car and ours has a better power to weight than the GT2 RS. Our Achilles heal? No all wheel drive, no paddle shifter.
Current setup Video; Sorry about the disco music
Jason's before:
Last edited by Halltech; 11-04-2011 at 06:17 PM.
11-04-2011, 05:47 PM
#17
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St. Jude Donor '09
We have -33lbs coming off the rear end area next month
-14.5lbs from the ZR1 Carbon roof and pillar
-5lbs off the rear with another modification
-12 off the front engine compartment
-5 off the engine compartment
-5lbs titanium parts (looking for donations)
-4lbs in plastic junk
Goal: -71lbs by March 2879 lbs; car will look stock (mostly)
Met and beat our goal by 43lbs
-14.5lbs from the ZR1 Carbon roof and pillar
-5lbs off the rear with another modification
-12 off the front engine compartment
-5 off the engine compartment
-5lbs titanium parts (looking for donations)
-4lbs in plastic junk
Goal: -71lbs by March 2879 lbs; car will look stock (mostly)
Met and beat our goal by 43lbs
Last edited by Halltech; 08-03-2012 at 11:34 PM.
11-04-2011, 07:17 PM
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St. Jude Donor '09
Thanks,
One more point of order. All of the mods, on both cars will be listed, with photos, pricing, etc. Some items have not been released yet for public consumption. Katech has one coming of maximum value.
Jim
One more point of order. All of the mods, on both cars will be listed, with photos, pricing, etc. Some items have not been released yet for public consumption. Katech has one coming of maximum value.
Jim
