Go Back   EcoModder Forum > EcoModding > Aerodynamics
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 10-03-2012, 04:24 PM   #11 (permalink)
EcoModding Lurker
 
Join Date: Sep 2012
Location: Skokie, IL
Posts: 17

Z28 - '95 Chevrolet Camaro Z28
90 day: 17.47 mpg (US)
Thanks: 3
Thanked 1 Time in 1 Post
Quote:
Originally Posted by oil pan 4 View Post
Ohhh.
2.73 on a V8 with Th700 or 4L60x isnt the holy grail of V8 fuel economy but its darn close.
At some point I would like to go from 3.08 gears to 2.73 gears, I expect to pick up a little under 2mpg.
You would see at least that.
My metric for picking up MPGs is to try and stay under $250 per 1 MPG gained.
By the time you bought and installed the 2.73 rear, sold your old one I bet you could be in it for less than $500.
The 2.73 rear ends are toxic to the performance 1/4mile guys, they will all but give them away for free.
is that 2mpg purely highway or can some city increase be expected too?

regarding the mpguino, im not good at anything wiring or electronics so roughly how much would a shop charge to install it?

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 10-03-2012, 04:46 PM   #12 (permalink)
EcoModding Smurfer
 
Smurf's Avatar
 
Join Date: Aug 2012
Location: LaX
Posts: 293

Dime - '95 Chevy S10 LS ExtCab RWD
Pickups
90 day: 18.23 mpg (US)

G/A - '96 Pontiac Grand Am
Team Pontiac
90 day: 32.74 mpg (US)
Thanks: 52
Thanked 34 Times in 29 Posts
With an automatic, I would assume the 2.73s wouldn't improve city-mileage due to acceleration losses. But once you got the Camaro moving at speed, they would help keep the RPMs down.
__________________

  Reply With Quote
Old 10-03-2012, 05:35 PM   #13 (permalink)
EV convert
 
oil pan 4's Avatar
 
Join Date: Jul 2011
Location: NewMexico (USA)
Posts: 9,615

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: 228
Thanked 3,138 Times in 2,457 Posts
I would expect most of the gains from the gear swap to be had on the highway.
A city MPG improvement is possible.
When I put larger tires on my suburban it effected the final drive ratio a little. I expected MPGs to go down in city driving with bigger tires but MPGs stayed the same and may have even increased a little.
__________________
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:
camaroman101 (10-09-2012)
Old 10-03-2012, 05:45 PM   #14 (permalink)
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 13,041
Thanks: 20,895
Thanked 6,373 Times in 3,958 Posts
rear visibility

When backing,do you(can you) see below the wing to judge distances?
Also,in the winter,during a good snow,does the entire rear deck get covered over with snow? If so,when you drive,does the opening below the wing appear to have any effect with respect to clearing the decklid?
GM is very careful about rearward vision and the spoiler might have been a compromise,balancing safety and drag reduction/downforce.
__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
  Reply With Quote
Old 10-04-2012, 12:17 AM   #15 (permalink)
EcoModding Lurker
 
Join Date: Sep 2012
Location: Skokie, IL
Posts: 17

Z28 - '95 Chevrolet Camaro Z28
90 day: 17.47 mpg (US)
Thanks: 3
Thanked 1 Time in 1 Post
Quote:
Originally Posted by aerohead View Post
When backing,do you(can you) see below the wing to judge distances?
Also,in the winter,during a good snow,does the entire rear deck get covered over with snow? If so,when you drive,does the opening below the wing appear to have any effect with respect to clearing the decklid?
GM is very careful about rearward vision and the spoiler might have been a compromise,balancing safety and drag reduction/downforce.
nothing can be seen below the rear wing when backing up or looking through the rear view mirror so it has nothing to do with visability, and anytime it snows the rear deck and gap in the spoiler usually gets completely covered and filled in and it really doesnt seem to have any effect on keeping the rear window clean
  Reply With Quote
The Following User Says Thank You to camaroman101 For This Useful Post:
aerohead (10-04-2012)
Old 10-04-2012, 06:51 PM   #16 (permalink)
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 13,041
Thanks: 20,895
Thanked 6,373 Times in 3,958 Posts
gap

Quote:
Originally Posted by camaroman101 View Post
nothing can be seen below the rear wing when backing up or looking through the rear view mirror so it has nothing to do with visability, and anytime it snows the rear deck and gap in the spoiler usually gets completely covered and filled in and it really doesnt seem to have any effect on keeping the rear window clean
You might tuft the area back there,and observe the yarn alternately,with gap open,then taped shut,to see if the flow pattern appears to change with the alteration.
When GM was developing the Trans Am Firebird,the Camaro 'kicker' type spoiler had the best performance,but Pontiac had to stay with the 'styling',so they used something more like what is on your car now.

__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
  Reply With Quote
The Following User Says Thank You to aerohead For This Useful Post:
camaroman101 (10-09-2012)
Reply  Post New Thread


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