Go Back   EcoModder Forum > EcoModding > General Efficiency Discussion
Register Now
 Register Now
 


Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 04-27-2017, 03:45 AM   #11 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 18,076
Thanks: 4,948
Thanked 5,978 Times in 4,780 Posts
Well, half the length times the average displacement: 25% of 4lb.

Wait a minute — Less rotational inertia. Good 60ft times but poorer pulse and glide.

  Reply With Quote
The Following User Says Thank You to freebeard For This Useful Post:
Fingie (04-27-2017)
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 04-27-2017, 10:45 AM   #12 (permalink)
EV convert
 
oil pan 4's Avatar
 
Join Date: Jul 2011
Location: NewMexico (USA)
Posts: 9,045

Sub - '84 Chevy Diesel Suburban C10
SUV
90 day: 19.5 mpg (US)

camaro - '85 Chevy Camaro Z28

Riot - '03 Kia Rio POS
Team Hyundai
90 day: 30.21 mpg (US)

Bug - '01 VW Beetle GLSturbo
90 day: 26.43 mpg (US)

Sub2500 - '86 GMC Suburban C2500
90 day: 11.95 mpg (US)

Snow flake - '11 Nissan Leaf SL
SUV
90 day: 141.63 mpg (US)
Thanks: 215
Thanked 2,952 Times in 2,299 Posts
I originally purchased the 1LE drive shaft during my go fast days.
The real economic advantage will be from being able to grease the U-joints and not shelling out a U-joint on a road trip and/or having to go back to the drive shaft shop to spend another $100+ on a U-joint replacement in 50,000 to 100,000 miles.

The weight savings is fairly minimal. It was originally a go fast part.

I don't do the pulse and glide, if anything I will use EOC.

The rear axle on camaros, firebirds, trans am cars were all solid axle from 1967 to 2002, I don't know about the new 5th gen camaro. So that would make the axle partially sprung weight and 100% rotating weight.
There is an even lighter 4th Gen aluminum drive shaft but I have found they tend to fail in performance applications, the older 1LE aluminum drive shafts off a 3rd Gen is the one to have.
__________________
1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
  Reply With Quote
The Following User Says Thank You to oil pan 4 For This Useful Post:
freebeard (04-27-2017)
Old 04-27-2017, 03:56 PM   #13 (permalink)
Primer is still paint!
 
ChopStix's Avatar
 
Join Date: Aug 2015
Location: box by the river
Posts: 525

85 Chevy Pickup C10 - '85 Chevy C10
Thanks: 81
Thanked 109 Times in 84 Posts
Quote:
Originally Posted by oil pan 4 View Post
I originally purchased the 1LE drive shaft during my go fast days.
The real economic advantage will be from being able to grease the U-joints and not shelling out a U-joint on a road trip and/or having to go back to the drive shaft shop to spend another $100+ on a U-joint replacement in 50,000 to 100,000 miles.
.
I'm no expert, but I would think that it would take less power to turn the aluminum at the same speed as a steel one, which should have a tiny mpg benefit. I'm not saying just that one change would equal 1 mpg. But maybe if it was combined with some other mods it might show a measurable benefit.
  Reply With Quote
Old 04-27-2017, 10:44 PM   #14 (permalink)
Master EcoModder
 
Stubby79's Avatar
 
Join Date: Sep 2012
Location: Victoria, BC
Posts: 1,608

Firefly EV - '98 Pontiac Firefly EV
90 day: 107.65 mpg (US)

Little Boy Blue - '05 Toyota Echo
90 day: 33.35 mpg (US)

BlueZ - '19 Nissan 370Z Sport
90 day: 17.19 mpg (US)
Thanks: 67
Thanked 494 Times in 369 Posts
Quote:
Originally Posted by ChopStix View Post
I'm no expert, but I would think that it would take less power to turn the aluminum at the same speed as a steel one, which should have a tiny mpg benefit. I'm not saying just that one change would equal 1 mpg. But maybe if it was combined with some other mods it might show a measurable benefit.
It will take less power to accelerate a lighter mass. Keeping it spinning at the same speed there will be no difference between the two. His benefits will therefore be noticed more on take-off and/or stop and go traffic.
  Reply With Quote
The Following User Says Thank You to Stubby79 For This Useful Post:
jamesqf (04-28-2017)
Old 04-28-2017, 10:37 PM   #15 (permalink)
Master EcoModder
 
oldtamiyaphile's Avatar
 
Join Date: May 2009
Location: Australia
Posts: 1,507

UFI - '12 Fiat 500 Twinair
Team Turbocharged!
90 day: 40.3 mpg (US)

Jeep - '05 Jeep Wrangler Renegade
90 day: 18.09 mpg (US)

R32 - '89 Nissan Skyline

STiG - '16 Renault Trafic 140dCi Energy
90 day: 31.08 mpg (US)

Prius - '05 Toyota Prius
Team Toyota
90 day: 50.25 mpg (US)

Premodded - '49 Ford Freighter
90 day: 13.48 mpg (US)

F-117 - '10 Proton Arena GLSi
Pickups
Mitsubishi
90 day: 37.82 mpg (US)

Ralica - '85 Toyota Celica ST
90 day: 25.23 mpg (US)

Sx4 - '07 Suzuki Sx4
90 day: 32.21 mpg (US)
Thanks: 322
Thanked 443 Times in 313 Posts
Keep in mind that the driveshaft spins on a very short radius, so the inertia savings won't be anything like if you saved the same amount of weight from your tyres.
__________________






  Reply With Quote
Old 04-29-2017, 12:05 AM   #16 (permalink)
EV convert
 
oil pan 4's Avatar
 
Join Date: Jul 2011
Location: NewMexico (USA)
Posts: 9,045

Sub - '84 Chevy Diesel Suburban C10
SUV
90 day: 19.5 mpg (US)

camaro - '85 Chevy Camaro Z28

Riot - '03 Kia Rio POS
Team Hyundai
90 day: 30.21 mpg (US)

Bug - '01 VW Beetle GLSturbo
90 day: 26.43 mpg (US)

Sub2500 - '86 GMC Suburban C2500
90 day: 11.95 mpg (US)

Snow flake - '11 Nissan Leaf SL
SUV
90 day: 141.63 mpg (US)
Thanks: 215
Thanked 2,952 Times in 2,299 Posts
The drive shaft also spins exactly 3.73 times faster than the wheels.

__________________
1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
  Reply With Quote
Reply  Post New Thread


Tags
firebird, weight reduction

Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com