4.0 OHV vs 4.0I6HO - Page 3 - Ranger-Forums - The Ultimate Ford Ranger Resource


4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

Reply
 
LinkBack Thread Tools Search this Thread
  #51  
Old 03-03-2009
Spirochets's Avatar
Member
 
Join Date: Jun 2008
Location: Lafayette, La
Posts: 291
WAIT! WAIT! WAIT! WAIT!!!! What The ****? YOU ARE BOTH WRONG!!!!!!!!!!!!!Since when did Santa become Imaginary?
Reply With Quote
  #52  
Old 03-03-2009
wydopnthrtl's Avatar
Member
iTrader: (2)
 
Join Date: Dec 2005
Location: SE, Mi
Posts: 2,342
Quote:
Originally Posted by Takeda View Post
There is a lot of information on dynos, and the different techniques to measure horsepower, AND torque directly,
Directly from your link:

"Power = Torque x RPM / 5252 "


Try again..
Reply With Quote
  #53  
Old 03-03-2009
wydopnthrtl's Avatar
Member
iTrader: (2)
 
Join Date: Dec 2005
Location: SE, Mi
Posts: 2,342
Quote:
Originally Posted by Spirochets View Post
WAIT! WAIT! WAIT! WAIT!!!! What The ****? YOU ARE BOTH WRONG!!!!!!!!!!!!!Since when did Santa become Imaginary?


ho ho ho.. I know when it started for me. When your first child looks up with those puppy dog eyes and tells you want they want santa to bring them.
Reply With Quote
  #54  
Old 03-03-2009
wydopnthrtl's Avatar
Member
iTrader: (2)
 
Join Date: Dec 2005
Location: SE, Mi
Posts: 2,342
Quote:
Originally Posted by Takeda View Post
There is a lot of information on dynos,
Actually.. there are three different kinds of dynos commonly used for cars/trucks and engines. Most of them *don't* actually measure the torque. They calculate it. (like dynojet)

When tuning a engine this is a ball park way to get you close. But until you load the engine like it'll be loaded on the road/dragstrip you won't get it deadly accurate.

Rich
Reply With Quote
  #55  
Old 03-03-2009
Level I Supporter
 
Join Date: Aug 2006
Location: Durham, NC
Posts: 3,657
Quote:
Originally Posted by wydopnthrtl View Post
Directly from your link:

"Power = Torque x RPM / 5252 "


Try again..
Like I said, there are many measurement techniques, look at this:

In its most basic form, a rear wheel dyno is a fixed inertia-only type device in that it does not actually measure an engine's torque output using an absorption unit. Instead, the motorcycle's rear wheel accelerates a heavy roll of known mass and inertia. The dyno measures the time and rate of acceleration to a given engine speed at wide-open throttle (WOT) conditions. Torque and horsepower are then calculated by software from the time and acceleration rate. The more rapidly the heavy steel drum is accelerated to a given rpm, the greater the engine's horsepower.
Reply With Quote
  #56  
Old 03-03-2009
wydopnthrtl's Avatar
Member
iTrader: (2)
 
Join Date: Dec 2005
Location: SE, Mi
Posts: 2,342
Quote:
Originally Posted by Takeda View Post
Like I said, there are many measurement techniques, look at this:

In its most basic form, a rear wheel dyno is a fixed inertia-only type device in that it does not actually measure an engine's torque output using an absorption unit. Instead, the motorcycle's rear wheel accelerates a heavy roll of known mass and inertia. The dyno measures the time and rate of acceleration to a given engine speed at wide-open throttle (WOT) conditions. Torque and horsepower are then calculated by software from the time and acceleration rate. The more rapidly the heavy steel drum is accelerated to a given rpm, the greater the engine's horsepower.
Thats exactly how the dynojet series work. They *measure* neither.



Now.. answer the original question. Maybe you could show us a horsepower wrench?
Reply With Quote
  #57  
Old 03-03-2009
99ranger4x4's Avatar
RF Veteran
iTrader: (3)
 
Join Date: Jun 2006
Location: Austin, TX
Posts: 12,198
Stop posting pics of little import cars. one or 2 would have been sufficient, I don't think those fall into the discussion of the origional thread their useless, they get tons of money put into them, get trailered to SEMA, if their LUCKY thrown on a dyno for bragging rights then go to shows until their stripped for parts for the next car..

Horsepower = how fast you hit the wall
torque = how HARD you hit the wall

..discussion closed


Both the 4.0 OHV and 4.0 I6 in Jeeps are strong, bullet proof motors.
Reply With Quote
  #58  
Old 03-03-2009
redranger4.0's Avatar
Member
 
Join Date: Jun 2004
Location: Firey depths
Posts: 15
Quote:
Originally Posted by 99ranger4x4 View Post
Stop posting pics of little import cars. one or 2 would have been sufficient, I don't think those fall into the discussion of the origional thread their useless, they get tons of money put into them, get trailered to SEMA, if their LUCKY thrown on a dyno for bragging rights then go to shows until their stripped for parts for the next car..

Horsepower = how fast you hit the wall
torque = how HARD you hit the wall

..discussion closed


Both the 4.0 OHV and 4.0 I6 in Jeeps are strong, bullet proof motors.
The qoute is HP is how fast you hit the wall, torque is how far you drag it.
Reply With Quote
  #59  
Old 03-03-2009
wydopnthrtl's Avatar
Member
iTrader: (2)
 
Join Date: Dec 2005
Location: SE, Mi
Posts: 2,342
Getting back to the original point..

Quote:
Originally Posted by God,Country,FORD View Post
what would it take to make our OHV's like a "high output" build?
IMO a longer stroke crank, ported heads, a matching cam, and a good rotational balance would be a solid rebuild to get you a "HO" engine.

Our 4.0L castings are pretty weak so I'd not push one of these things too hard w/o a really really good balance job.

A good benchmark would be to check out what SUPER SIX MOTORSPORTS is offering.
Reply With Quote
  #60  
Old 03-03-2009
99ranger4x4's Avatar
RF Veteran
iTrader: (3)
 
Join Date: Jun 2006
Location: Austin, TX
Posts: 12,198
Quote:
Originally Posted by redranger4.0 View Post
The qoute is HP is how fast you hit the wall, torque is how far you drag it.
wrong
the quote i saw was the one i typed
Reply With Quote
  #61  
Old 03-04-2009
God,Country,FORD's Avatar
Member
Thread Starter
iTrader: (1)
 
Join Date: Nov 2007
Location: Red Oak, IA
Posts: 2,468
thanks guys.. didnt mean to start a heated debate..
Reply With Quote
  #62  
Old 03-04-2009
wydopnthrtl's Avatar
Member
iTrader: (2)
 
Join Date: Dec 2005
Location: SE, Mi
Posts: 2,342
Quote:
Originally Posted by God,Country,FORD View Post
thanks guys.. didnt mean to start a heated debate..
LOL.. you didn't start anything. bob likes to pick on me specifically and does so in a lot of other threads.

No worries..
Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
4.3 Vortec vs 4.0 OHV vs. 4.0 SOHC TippnOver 4.0L OHV & SOHC V6 Tech 71 01-18-2011 07:20 AM
4.0 OHV rocker spacers 98blownranger 4.0L OHV & SOHC V6 Tech 7 04-20-2008 03:45 PM
Swapping a 4.0 OHV to a SOHC MRC 4.0L OHV & SOHC V6 Tech 15 06-21-2006 12:48 PM
4.0 OHV camshaft synchronizer? MRC 4.0L OHV & SOHC V6 Tech 8 01-02-2005 12:17 AM
hop ups for the ohv redranger4.0 4.0L OHV & SOHC V6 Tech 23 08-03-2004 05:33 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -6. The time now is 05:56 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.