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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 04-05-2017, 12:25 AM   #11 (permalink)
Corporate imperialist
 
oil pan 4's Avatar
 
Join Date: Jul 2011
Location: NewMexico (USA)
Posts: 11,175

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: 269
Thanked 3,522 Times in 2,796 Posts
Quote:
Originally Posted by canadian_yeti View Post
Well metro, i figured 3.73 or maybe 3.42 at the lowest. I do a fairly equal amount of city and highway, and my clutch already isnt in the greatest shape lol. Unfortunately to my knowledge, there are no other factory or easily usable transmission options for the 4cyl s10. If it were the V6, i could use fat more because it has the same bellhousing pattern as all SBC engines made up to the early 00's. I have thought before of usong a T56 6spd from a 98-02 camaro/trans am/corvette
That's not entirely correct.
The only V6 that could use a "SBC transmission" is a 4.3L.
The Chevy V8 pattern has stayed the same with all SBC, BBC, 4.3LV6, 6.2L and 6.5 diesel, dramamax diesel, LT, and LS serries. The only change has been the LS serries was there was 1 less bolt other wise the pattern has not changed.

The 3800 V6 has its own transmission pattern.
The 60° V6 and 4 cylinder engines I believe use the same pattern.

Your best bet is to figure out what all the gear ratios are then figure out what your lowest cruse RPM for highway driving might be. For a 4 cylinder s-10 maybe shoot for 1,800rpm at 65mph.

For example my 8L high compression big block Chevy should have a highway cruise speed of 1,400rpm at 75mph. If I remember correctly I would need a 0.5 top gear and 27 inch tire and 3:1 rear gear.

__________________
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
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 04-05-2017, 12:16 PM   #12 (permalink)
EcoModding Lurker
 
Join Date: Apr 2017
Location: ontario, canada
Posts: 31
Thanks: 6
Thanked 9 Times in 6 Posts
when I said "if it had the V6", I was referring to the only v6 that came in a second gen s10, which was the 4.3L. The 3.8 was never in an s10.

how would I go about calculating what my cruising rpm should be?

Last edited by canadian_yeti; 04-05-2017 at 12:29 PM..
  Reply With Quote
Old 04-05-2017, 12:23 PM   #13 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,513

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 52.71 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 70.75 mpg (US)

Appliance car - '14 Mitsubishi Mirage ES (base)
90 day: 60.16 mpg (US)
Thanks: 4,058
Thanked 6,957 Times in 3,602 Posts
There are a number of online gearing/speed/RPM calculators around...

eg:

Transmission Ratio RPM Calculator | Spicer Parts

If that one isn't right, do a search. There are a lot out there.
__________________
Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata
Honda mods: Ecomodding my $800 Honda Fit 5-speed beater
Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage.
Ecodriving test: Manual vs. automatic transmission MPG showdown



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
  Reply With Quote
Old 04-05-2017, 03:47 PM   #14 (permalink)
Master EcoModder
 
aardvarcus's Avatar
 
Join Date: Apr 2012
Location: Evensville, TN
Posts: 676

Deep Blue - '94 GMC Suburban K2500 SLE
90 day: 23.75 mpg (US)

Griffin (T4R) - '99 Toyota 4Runner SR5
90 day: 25.43 mpg (US)
Thanks: 237
Thanked 580 Times in 322 Posts
I always wanted a Frankenstein bed, take a stepside rear and tailgate and put it on the fleetside bed, then taper in the fleetside body sides as you go back to meet up with the narrower tailgate.
  Reply With Quote
Old 04-05-2017, 04:31 PM   #15 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 27,562
Thanks: 7,738
Thanked 8,554 Times in 7,041 Posts
The bed and tailgate width would mis-match. Start with a stepside bed, cut the fenders down to an inner liner and bend the fleetside sheet metal to fit.
  Reply With Quote
Old 04-06-2017, 12:33 PM   #16 (permalink)
EcoModding Lurker
 
Join Date: Apr 2017
Location: ontario, canada
Posts: 31
Thanks: 6
Thanked 9 Times in 6 Posts
Quote:
Originally Posted by freebeard View Post
The bed and tailgate width would mis-match. Start with a stepside bed, cut the fenders down to an inner liner and bend the fleetside sheet metal to fit.

basically dove tailing a fleetside bed the way offroad guys would. getting the boat tail effect of aerodynamics, but without adding weight and length to the back of the vehicle.

well, thanks for everyones input. I think I'm gunna stick with my fleetside, put new outer bedsides on it, a roll pan, and build an aero cap
  Reply With Quote
The Following 2 Users Say Thank You to canadian_yeti For This Useful Post:
aerohead (04-08-2017), freebeard (04-06-2017)
Old 04-06-2017, 01:11 PM   #17 (permalink)
Corporate imperialist
 
oil pan 4's Avatar
 
Join Date: Jul 2011
Location: NewMexico (USA)
Posts: 11,175

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: 269
Thanked 3,522 Times in 2,796 Posts
What RPM do you run at highway speed now?
__________________
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
Old 04-06-2017, 02:30 PM   #18 (permalink)
Master EcoModder
 
kach22i's Avatar
 
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 4,158
Thanks: 120
Thanked 2,790 Times in 1,959 Posts
Here is a S10 Fleetside bed, using your imagination you may be able to figure out that the Sportside/Sidestep is a step down, no pun intended.

http://s184.photobucket.com/user/kac...?sort=3&page=1
__________________
George
Architect, Artist and Designer of Objects

1977 Porsche 911s Targa
1998 Chevy S-10 Pick-Up truck
1989 Scat II HP Hovercraft

Chin Spoiler:
http://forums.pelicanparts.com/off-t...effective.html

Rear Spoiler Pick Up Truck
http://forums.pelicanparts.com/off-t...xperiment.html

Roof Wing
http://ecomodder.com/forum/showthrea...1-a-19525.html
  Reply With Quote
The Following 3 Users Say Thank You to kach22i For This Useful Post:
aerohead (04-08-2017), freebeard (04-07-2017), MetroMPG (04-07-2017)
Old 04-06-2017, 03:19 PM   #19 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 27,562
Thanks: 7,738
Thanked 8,554 Times in 7,041 Posts
Quote:
I think I'm gunna stick with my fleetside, put new outer bedsides on it, a roll pan, and build an aero cap
It's hard to go wrong with frenched 59 Caddy taillights



Instead of a 50s-style sheet metal pan with a frenched license plate, consider a rear valance from a late-model junker. Compare:


http://www.bodykits.com/c-1265984-shop-by-vehicle-scion-frs-rear-bumper.html

These both fit the Subaru BRZ. The first one could be done as a sheet metal pan with sharkfin fences; I prefer the second one for the cut-line and the skegs.
  Reply With Quote
Old 04-07-2017, 12:13 PM   #20 (permalink)
EcoModding Lurker
 
Join Date: Apr 2017
Location: ontario, canada
Posts: 31
Thanks: 6
Thanked 9 Times in 6 Posts
Quote:
Originally Posted by oil pan 4 View Post
What RPM do you run at highway speed now?
I cruise at 100km/h on the highway(65mph I think) and it hovers around 2800-3000rpm. just a rough guess but I would think 3.73's would put me closer to 2000 and 3.42's would put me around 1500. not sure how bad it would effect acceleration and take off though. I shift at 2000rpm as much as possible. shift light comes on around 2600 depending on throttle position. if I shift any lower than 2000, it doesnt seem to like it and falls on its face

  Reply With Quote
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com