4.0 SOHC Dyno Results - 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
  #1  
Old 03-02-2011
04RangerDave's Avatar
JDM> RANGER

Thread Starter
iTrader: (3)
 
Join Date: Jul 2010
Location: RI
Posts: 5,030
4.0 SOHC Dyno Results

So if you don't all know I'm in school for High Performance at NEIT in Warwick RI and the time came to using the dyno with our personal vehicles so i figured hell with it lets do the ranger. I made more passes but these are my best runs. all runs where done in 2nd gear to 5500 RPM. Heck it made more than a 94' Stock 5.0 with exhaust.

Name:  scan0001.jpg
Views: 347
Size:  151.0 KB
Name:  IMG_7405.jpg
Views: 198
Size:  98.6 KB
Reply With Quote
  #2  
Old 03-02-2011
Masteratarms93's Avatar
Member
iTrader: (8)
 
Join Date: Mar 2010
Location: Goose Creek SC
Posts: 4,685
176hp, not too shabby.
Reply With Quote
  #3  
Old 03-02-2011
04RangerDave's Avatar
JDM> RANGER

Thread Starter
iTrader: (3)
 
Join Date: Jul 2010
Location: RI
Posts: 5,030
Quote:
Originally Posted by Masteratarms93 View Post
176hp, not too shabby.
hey for a stock 4.0 with airbox mod with drop in and straight pipes its not bad at all
Reply With Quote
  #4  
Old 03-02-2011
Jelly's Ford's Avatar
Member
iTrader: (3)
 
Join Date: Mar 2010
Location: KnoxVegas, TN
Posts: 874
Your torque numbers are pretty impressive too lol.
Reply With Quote
  #5  
Old 03-02-2011
StxDangerRanger's Avatar
RF Veteran
iTrader: (2)
 
Join Date: Dec 2010
Location: Flat Rock, Mi
Posts: 6,313
Nice torque numbers!
Reply With Quote
  #6  
Old 03-03-2011
Murphy's Avatar
Member
 
Join Date: Jan 2011
Location: West Deptford NJ
Posts: 129
2nd gear is not 1:1 ratio, so those numbers are skewed due to gear multiplication.

4th is 1:1 on manual transmissions, and usually 3rd is for automatics.
Reply With Quote
  #7  
Old 03-03-2011
vista4.0's Avatar
Member
iTrader: (3)
 
Join Date: Jan 2009
Location: Beaver Falls, PA
Posts: 2,824
Quote:
Originally Posted by Murphy View Post
2nd gear is not 1:1 ratio, so those numbers are skewed due to gear multiplication.

4th is 1:1 on manual transmissions, and usually 3rd is for automatics.
I was wondering about this. I thought it seemed odd to have a 2nd gear run.
Reply With Quote
  #8  
Old 03-03-2011
V8 Level II's Avatar
RF Veteran
iTrader: (4)
 
Join Date: Nov 2004
Location: Michigan
Posts: 7,833
It seems to me that the transmission ratio correction would be done the same way the axle ratio and tire diameter corrections are done - with a simple multiplier. Done correctly, using 2nd gear would keep the dyno speeds within reason and yield the same measured torque result as 4th gear (except for whatever frictional difference there is between the transmission gearsets).

Besides, it isn't possible to do a 4th gear pull to 5500 RPM with a stock Ranger that is speed limited to 92 MPH and couldn't pull a 1:1 trans ratio to 5500 RPM (roughly 120~130 MPH) even if there were no limiter.
Reply With Quote
  #9  
Old 03-03-2011
04RangerDave's Avatar
JDM> RANGER

Thread Starter
iTrader: (3)
 
Join Date: Jul 2010
Location: RI
Posts: 5,030
Quote:
Originally Posted by rwenzing View Post
It seems to me that the transmission ratio correction would be done the same way the axle ratio and tire diameter corrections are done - with a simple multiplier. Done correctly, using 2nd gear would keep the dyno speeds within reason and yield the same measured torque result as 4th gear (except for whatever frictional difference there is between the transmission gearsets).

Besides, it isn't possible to do a 4th gear pull to 5500 RPM with a stock Ranger that is speed limited to 92 MPH and couldn't pull a 1:1 trans ratio to 5500 RPM (roughly 120~130 MPH) even if there were no limiter.
correct. with 2nd selected on my auto is the way to run it. in drive the speeds are too high and 5500 isnt possible there also would be lock up
Reply With Quote
  #10  
Old 03-03-2011
V8 Level II's Avatar
RF Veteran
iTrader: (4)
 
Join Date: Nov 2004
Location: Michigan
Posts: 7,833
Another thought: Are you aware that "2" on the cluster indicator is actually 3rd gear in the 5RxxE transmission?
Reply With Quote
  #11  
Old 03-03-2011
04RangerDave's Avatar
JDM> RANGER

Thread Starter
iTrader: (3)
 
Join Date: Jul 2010
Location: RI
Posts: 5,030
Quote:
Originally Posted by rwenzing View Post
Another thought: Are you aware that "2" on the cluster indicator is actually 3rd gear in the 5RxxE transmission?
are you sure? i have the 5R55E
Reply With Quote
  #12  
Old 03-03-2011
V8 Level II's Avatar
RF Veteran
iTrader: (4)
 
Join Date: Nov 2004
Location: Michigan
Posts: 7,833
Yes. Ford developed your 5 speed from the earlier 4 speed by using 1st + overdrive to create the new 2nd gear. However, the indicator doesn't reflect that change. So when you manually select "2" in the 5-speed, you get the new 3rd gear which is 1.47:1 (same as the old transmission's 2nd gear).



Comparison of 4R44E/4R55E 4-speed and 5R44E/5R55E 5-speed (current Ranger):

4R44E, 4R55E
1st 2.47
2nd 1.47
3rd 1.00
4th 0.75 (1.00 x 0.75)
5th ---

5R44E, 5R55E
1st 2.47
2nd 1.85 (2.47 x 0.75) <----(added gear in the 5-speed)
3rd 1.47
4th 1.00
5th 0.75 (1.00 x 0.75)
Reply With Quote
  #13  
Old 03-03-2011
Murphy's Avatar
Member
 
Join Date: Jan 2011
Location: West Deptford NJ
Posts: 129
Quote:
Originally Posted by rwenzing View Post
It seems to me that the transmission ratio correction would be done the same way the axle ratio and tire diameter corrections are done - with a simple multiplier. Done correctly, using 2nd gear would keep the dyno speeds within reason and yield the same measured torque result as 4th gear (except for whatever frictional difference there is between the transmission gearsets).

Besides, it isn't possible to do a 4th gear pull to 5500 RPM with a stock Ranger that is speed limited to 92 MPH and couldn't pull a 1:1 trans ratio to 5500 RPM (roughly 120~130 MPH) even if there were no limiter.
The speed limiter is unfortunate, yes. I have a feeling that unplugging the output shaft speed sensor (disabling the speedometer) might disable the speed limiter.

But why couldn't it get the drivetrain up to 5500RPM in 4th gear? The vehicle is stationary, there is no aerodynamic concerns present.
Reply With Quote
  #14  
Old 03-03-2011
vista4.0's Avatar
Member
iTrader: (3)
 
Join Date: Jan 2009
Location: Beaver Falls, PA
Posts: 2,824
Quote:
Originally Posted by Murphy View Post
The speed limiter is unfortunate, yes. I have a feeling that unplugging the output shaft speed sensor (disabling the speedometer) might disable the speed limiter.

But why couldn't it get the drivetrain up to 5500RPM in 4th gear? The vehicle is stationary, there is no aerodynamic concerns present.
it would hit 92mph before it hits 5500RPM
Reply With Quote
  #15  
Old 03-03-2011
morris's Avatar
RF Veteran
iTrader: (5)
 
Join Date: Feb 2008
Location: South Detroit.
Posts: 7,833
Quote:
Originally Posted by rwenzing View Post
Yes. Ford developed your 5 speed from the earlier 4 speed by using 1st + overdrive to create the new 2nd gear. However, the indicator doesn't reflect that change. So when you manually select "2" in the 5-speed, you get the new 3rd gear which is 1.47:1 (same as the old transmission's 2nd gear).



Comparison of 4R44E/4R55E 4-speed and 5R44E/5R55E 5-speed (current Ranger):

4R44E, 4R55E
1st 2.47
2nd 1.47
3rd 1.00
4th 0.75 (1.00 x 0.75)
5th ---

5R44E, 5R55E
1st 2.47
2nd 1.85 (2.47 x 0.75) <----(added gear in the 5-speed)
3rd 1.47
4th 1.00
5th 0.75 (1.00 x 0.75)
maybe that is why the older OHV trucks get better milage then the SOHC trucks. if i'm in 3rd the older truck is already in 4th at a lower gear. for me to be equal in gear i'd have to be driving a little faster to match powerband but using more fuel (faster speed)
Reply With Quote
  #16  
Old 03-03-2011
V8 Level II's Avatar
RF Veteran
iTrader: (4)
 
Join Date: Nov 2004
Location: Michigan
Posts: 7,833
Quote:
Originally Posted by morris View Post
maybe that is why the older OHV trucks get better milage then the SOHC trucks. if i'm in 3rd the older truck is already in 4th at a lower gear. for me to be equal in gear i'd have to be driving a little faster to match powerband but using more fuel (faster speed)
During part throttle acceleration, the 5RxxE transmission skips the new 2nd gear so it uses exactly the same gear ratios as the earlier 4RxxE transmission. 2nd is only used for WOT or near WOT for improved acceleration.
Reply With Quote
  #17  
Old 03-03-2011
morris's Avatar
RF Veteran
iTrader: (5)
 
Join Date: Feb 2008
Location: South Detroit.
Posts: 7,833
ah i see.
Reply With Quote
  #18  
Old 03-03-2011
04RangerDave's Avatar
JDM> RANGER

Thread Starter
iTrader: (3)
 
Join Date: Jul 2010
Location: RI
Posts: 5,030
but with 2nd selected there is no speed limiter. why is that
Reply With Quote
  #19  
Old 03-03-2011
Lord Of War's Avatar
Member
iTrader: (2)
 
Join Date: Jan 2006
Location: Thornton, Colorado
Posts: 4,599
I would love for you to get a tune and see what the difference is.
Reply With Quote
  #20  
Old 03-03-2011
V8 Level II's Avatar
RF Veteran
iTrader: (4)
 
Join Date: Nov 2004
Location: Michigan
Posts: 7,833
Quote:
Originally Posted by 04RangerDave View Post
but with 2nd selected there is no speed limiter. why is that
In lever position "2", actually 3rd gear in the 5R, you're still under the 92 MPH speed limiter at 5500 RPM.
Reply With Quote
  #21  
Old 03-03-2011
Jelly's Ford's Avatar
Member
iTrader: (3)
 
Join Date: Mar 2010
Location: KnoxVegas, TN
Posts: 874
Quote:
Originally Posted by Lord Of War View Post
I would love for you to get a tune and see what the difference is.
Yeah I agree. I'd like to see just how much of a difference the tunes actually make.
Reply With Quote
  #22  
Old 03-03-2011
04RangerDave's Avatar
JDM> RANGER

Thread Starter
iTrader: (3)
 
Join Date: Jul 2010
Location: RI
Posts: 5,030
Quote:
Originally Posted by Jelly's Ford View Post
Yeah I agree. I'd like to see just how much of a difference the tunes actually make.
lucky for you fellas ill post a dyno sheet when i buy a tuner. just unsure of what I'm going to buy.
Reply With Quote
  #23  
Old 03-03-2011
StratGT's Avatar
Member
 
Join Date: Sep 2009
Location: Mississauga
Posts: 54
The 4.56 gearing combined with those tires are lowering your numbers. But, your numbers are good.
Reply With Quote
  #24  
Old 03-04-2011
IN2 FX4's Avatar
Member
 
Join Date: Feb 2005
Location: Costa Mesa, CA
Posts: 855
Gearing and tire diameter should have no effect on dyno numbers unless there is tire slippage. When my race car is on the dyno, they want me to run tall tires and tall differential gears in forth gear to help eliminate tires slippage. That is because the car is so light.
Reply With Quote
  #25  
Old 03-04-2011
04RangerDave's Avatar
JDM> RANGER

Thread Starter
iTrader: (3)
 
Join Date: Jul 2010
Location: RI
Posts: 5,030
Quote:
Originally Posted by StratGT View Post
The 4.56 gearing combined with those tires are lowering your numbers. But, your numbers are good.
has nothing to do with numbers. the dyno didn't pick up any vibrations from the tires. the gearing didn't affect the numbers
Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
4.0 ohv dyno results fishy2k8 4.0L OHV & SOHC V6 Tech 3 02-20-2011 03:19 AM
'97 GT on a 100 shot dyno results EdGe_wannabe Snapshots 26 03-31-2009 07:18 PM
My Dyno results Rob99 4.0L OHV & SOHC V6 Tech 5 07-25-2005 11:43 AM
Dyno Results.... rngprerunner General Ford Ranger Discussion 17 12-17-2004 06:05 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 07:29 AM.


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.