-
Grand Future Air Dried Beef Dog Food

Carnivore Diet for Dogs

Air Dried Dog Food | Real Beef
Go Back   Automotive Forums Car Chat > Engineering/ Technical
Register FAQ Community
Engineering/ Technical Ask technical questions about cars. Do you know how a car engine works?
Reply Show Printable Version Show Printable Version | Subscription Subscribe to this Thread
 
Thread Tools
  #1  
Old 03-01-2005, 12:28 AM
Aiden2002 Aiden2002 is offline
AF Newbie
 
Join Date: Sep 2004
Posts: 22
Thanks: 0
Thanked 0 Times in 0 Posts
Can you run an engine backwards.

Can you, and if so what is involved in, running an engine backwards?
Reply With Quote
  #2  
Old 03-01-2005, 12:30 AM
Schister66's Avatar
Schister66 Schister66 is offline
AF -Advisor
 
Join Date: Oct 2004
Posts: 3,897
Thanks: 0
Thanked 0 Times in 0 Posts
Send a message via AIM to Schister66 Send a message via MSN to Schister66
Re: Can you run an engine backwards.

Yes and no. You can design an engine to run backwards, but it would take a considerable amount of work to convert an engine to run the other direction.

Believe it or not, but there are actually versions of the 350 (i think it is the 350) that are designed to run opposite of the normal. These engines are used in boats that have 2 engines so that the propellors turn opposite which eliminates torque-steer.
__________________
2015 DGM STi - 2006 SGM STi - 1999 Built/boosted GSR
Reply With Quote
  #3  
Old 03-01-2005, 08:45 PM
Aiden2002 Aiden2002 is offline
AF Newbie
Thread starter
 
Join Date: Sep 2004
Posts: 22
Thanks: 0
Thanked 0 Times in 0 Posts
What exactly would be involved in getting the motor to run backwards? Like what kind of stuff do you have to change? Just the starter, timing and reprogram the ecu?
Reply With Quote
  #4  
Old 03-01-2005, 09:12 PM
beyondloadedSE's Avatar
beyondloadedSE beyondloadedSE is offline
AF Ford Contour-Advisor
 
Join Date: Mar 2003
Posts: 1,815
Thanks: 0
Thanked 2 Times in 2 Posts
I hope you can accomodate a transmission that runs backwards too.
__________________

"The CEG Nazi"
www.contour.org
1996 Ford Contour SE - Sold
3.0L V6 and Arizona Dyno Chip Turbo Kit
364 whp, 410 wtq @ 16 psi and only 4,700 rpms.
1999 Tropic Green SVT Contour - Bone stock and MINT
Reply With Quote
  #5  
Old 03-01-2005, 09:21 PM
benchtest benchtest is offline
AF Enthusiast
 
Join Date: Sep 2004
Posts: 174
Thanks: 0
Thanked 0 Times in 0 Posts
Re: Can you run an engine backwards.

You didn't specify what kind of engine. The biggest change is the camshaft. The starter is a given. Water pump usually, unless it's electric. It will vary by engine after that. Usually it's a boat thing, so the trans. isn't an issue. Look up a marine engine for more detail.

Some older diesels also will run backwards...with no changes. This is not a good thing, but does happen when lugged too hard.
__________________
Remember: Don't confuse noise with horsepower! and Junk is junk, even when it's on sale!

"I would never doubt your expertise....it's obvious you wrote the book on stupidity!" DD
Reply With Quote
  #6  
Old 03-01-2005, 09:29 PM
MagicRat's Avatar
MagicRat MagicRat is offline
Nothing scares me anymore
 
Join Date: Dec 2003
Posts: 10,702
Thanks: 12
Thanked 82 Times in 77 Posts
Re: Can you run an engine backwards.

Older two-stroke engines will easily run backwards.
The electronic ignition kind won't , but many older ones used a magneto and points ignition system.
Just spin the engine backwards and off you go.

This is very easy on old (30+ years) 2-stroke dirt bikes. If you go up a steep hill it's easy to stall and start rolling backwards. If you are in gear, the engine might start and accelerate you at a huge speed........ backwards. Very embarrasing and often painful.
Reply With Quote
  #7  
Old 03-02-2005, 12:02 AM
Aiden2002 Aiden2002 is offline
AF Newbie
Thread starter
 
Join Date: Sep 2004
Posts: 22
Thanks: 0
Thanked 0 Times in 0 Posts
I was thinking a K20 into a 5g Civic. I don't want to cut the frame and i need A/C still. I'd use an adapterplate to a most likely b series transmission.
Reply With Quote
  #8  
Old 03-02-2005, 01:52 AM
benchtest benchtest is offline
AF Enthusiast
 
Join Date: Sep 2004
Posts: 174
Thanks: 0
Thanked 0 Times in 0 Posts
Re: Can you run an engine backwards.

Curious: For what purpose?
__________________
Remember: Don't confuse noise with horsepower! and Junk is junk, even when it's on sale!

"I would never doubt your expertise....it's obvious you wrote the book on stupidity!" DD
Reply With Quote
  #9  
Old 03-02-2005, 11:37 PM
Aiden2002 Aiden2002 is offline
AF Newbie
Thread starter
 
Join Date: Sep 2004
Posts: 22
Thanks: 0
Thanked 0 Times in 0 Posts
Maximum horsepower per liter is why. Now some people would say why not just get a bigger engine? Because that's too easy. I don't have the money to buy an RSX and Rice it out, so i figure i'll take i-VTEC in all of it's glory and throw it in my car. I want to live in AZ because it has nice roads year round. That means that I need A/C. I don't deal with heat well.
Reply With Quote
  #10  
Old 03-03-2005, 12:05 AM
benchtest benchtest is offline
AF Enthusiast
 
Join Date: Sep 2004
Posts: 174
Thanks: 0
Thanked 0 Times in 0 Posts
Re: Can you run an engine backwards.

Ok, thanks for the info. I'm not a Civic guy, but what you're saying is that the engine faces the opposite direction in the donor car? And I'm with you on a/c..gotta have it
__________________
Remember: Don't confuse noise with horsepower! and Junk is junk, even when it's on sale!

"I would never doubt your expertise....it's obvious you wrote the book on stupidity!" DD
Reply With Quote
 
Reply

POST REPLY TO THIS THREAD

Go Back   Automotive Forums Car Chat > Engineering/ Technical


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 08:54 PM.

Community Participation Guidelines | How to use your User Control Panel

Powered by: vBulletin | Copyright Jelsoft Enterprises Ltd.
 
 
no new posts