what is the difference in these 2 camshafts? - 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 01-11-2007
lifted97ranger's Avatar
Member
Thread Starter
 
Join Date: Nov 2005
Location: Charlestown, IN
Posts: 1
what is the difference in these 2 camshafts?

just curious? any advantages to one over the other? what other parts would someone need to install these besides the gaskets (ie: lifters, pushrods, etc.?)
  • http://store.summitracing.com/partde...5&autoview=sku

    Specs:

    Brand: COMP Cams
    Product Line: COMP Cams High Energy Camshafts
    Cam Style: Hydraulic roller tappet
    Basic Operating RPM Range: 800-4,800 RPM
    Intake Duration at 050 inch Lift: 201
    Exhaust Duration at 050 inch Lift: 210
    Duration at 050 inch Lift: 201 int./210 exh.
    Advertised Intake Duration: 256
    Advertised Exhaust Duration: 266
    Advertised Duration: 256 int./266 exh.
    Intake Valve Lift with Factory Rocker Arm Ratio: 0.465 in.
    Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.500 in.
    Valve Lift with Factory Rocker Arm Ratio: 0.465 int./0.500 exh. lift
    Lobe Separation (degrees): 112
    Intake Valve Lash: 0.000 in.
    Exhaust Valve Lash: 0.000 in.
    Computer Controlled Compatible: Yes
    Grind Number: FV6 256HR-12
    Quantity: Sold individually.
  • http://store.summitracing.com/partde...5&autoview=sku

    Specs:

    Brand: COMP Cams
    Product Line: COMP Cams High Energy Camshafts
    Cam Style: Hydraulic roller tappet
    Basic Operating RPM Range: 1,200-5,200 RPM
    Intake Duration at 050 inch Lift: 215
    Exhaust Duration at 050 inch Lift: 224
    Duration at 050 inch Lift: 215 int./224 exh.
    Advertised Intake Duration: 270
    Advertised Exhaust Duration: 284
    Advertised Duration: 270 int./284 exh.
    Intake Valve Lift with Factory Rocker Arm Ratio: 0.500 in.
    Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.500 in.
    Valve Lift with Factory Rocker Arm Ratio: 0.500 int./0.500 exh. lift
    Lobe Separation (degrees): 112
    Intake Valve Lash: 0.000 in.
    Exhaust Valve Lash: 0.000 in.
    Computer Controlled Compatible: Yes
    Grind Number: FV6 270HR-12
    Quantity: Sold individually.
Reply With Quote
  #2  
Old 01-11-2007
bwester04's Avatar
Member
 
Join Date: Mar 2006
Location: Round Rock, Tx
Posts: 2,641
basically compare the operating RPM range.. you'll probably get more lower end oomph from the first one, just depends on your driving style
Reply With Quote
  #3  
Old 01-11-2007
greygooseranger's Avatar
Member
 
Join Date: Apr 2006
Location: SE Michigan
Posts: 3,293
^^^ agreed, its looks like its when you want the power to come on......
Reply With Quote
  #4  
Old 01-11-2007
Member
 
Join Date: Feb 2005
Location: Edmonton, Alberta
Posts: 1,027
i bet bob or john will clue in ...

but im with them ^^^
Reply With Quote
  #5  
Old 01-11-2007
lifted97ranger's Avatar
Member
Thread Starter
 
Join Date: Nov 2005
Location: Charlestown, IN
Posts: 1
well i guess the 1st one would be better for my driving style.....i hardly ever get above 3,000 rpm's unless i am responding to a fire...
Reply With Quote
  #6  
Old 01-11-2007
TORQUERULES's Avatar
Member
 
Join Date: Aug 2006
Location: Ripley, WV
Posts: 302
There is a big difference between the two. The first one has specs that many used to call "RV" cam specs. A step above stock and mostly intended for towing and low-speed torque production. The second cam can be considered a mild (or even middle for a little engine like the 4.0) performance cam with streetable duration numbers at .050. On the little 4.0 it would be decently lopey and would not have as much idle vacuum as stock or the 256 camshaft. It would cause you to lose some low-end but your midrange and top end would improve tremendously. If your heads and intake are staying stock and you like to tow and do a lot of daily driving and off-roading I would say go with the first cam. It is more of a 'truck" cam and will move a 4x4 pretty well. Just don't expect a huge increase in top-end power. If you are porting and maybe bumping compression a little and have some decent gears, then I would get the 2nd one. You would love the power increase.

Oh BTW, the first one should still give you a little bump at idle.

Hope this helps!
Reply With Quote
  #7  
Old 01-11-2007
TORQUERULES's Avatar
Member
 
Join Date: Aug 2006
Location: Ripley, WV
Posts: 302
More info:

My Dad had a 3.8 V-6 swapped in an '86 Ranger (unusual I know...) that had Holley Pro-Jection (throttle body), heads I ported, flat-top pistons, and a cam from Racer Walsh with .050 duration specs and lobe separation like the second cam you mentioned. Total duration was 282 (the one you mentioned above is 270), but the .050 number is actually more important. It was lopey, not as torquey down low as stock, but from about 2,500rpm up it would scream. Wasted a many 4.3 S-10. It was a lightweight low-option (originally a 2.0 engined truck) 2wd Ranger though.
Reply With Quote
  #8  
Old 01-11-2007
lifted97ranger's Avatar
Member
Thread Starter
 
Join Date: Nov 2005
Location: Charlestown, IN
Posts: 1
well i was curious.....if i were to install one by what you all said, it would be the 1st one because i would want low end power and torque...
Reply With Quote
  #9  
Old 01-11-2007
TORQUERULES's Avatar
Member
 
Join Date: Aug 2006
Location: Ripley, WV
Posts: 302
Go for it. I just think it is great that Comp has some cams for the 4.0 OHV. Now for the SOHC!!!!
Reply With Quote
  #10  
Old 01-11-2007
Member
 
Join Date: Feb 2005
Location: Edmonton, Alberta
Posts: 1,027
i was going to say the first seemed like a torque cam but i didnt wanna be wrong and get hollard at..id go with # 1 id wanna have that extra torque over HP anyday
Reply With Quote
  #11  
Old 01-11-2007
lifted97ranger's Avatar
Member
Thread Starter
 
Join Date: Nov 2005
Location: Charlestown, IN
Posts: 1
Reply With Quote
  #12  
Old 01-12-2007
D.
Unregistered User
 
Posts: n/a
What you have to compare is lift amount and Duration. The longer the duration ( measured in degrees ) , the longer the valve is open to let air/fuel into the cylinders.

The second cam has a longer duration and a bit more lift to it, thus its going to have a bigger/wider ' power ' band ( or a noticibly different one from stock/the first cam ).
Reply With Quote
  #13  
Old 01-12-2007
RHuckster's Avatar
Member
 
Join Date: Apr 2006
Location: Lake Elsinore, Ca.
Posts: 643
Yea, as said, the 1st one is a cam for low end torque(RV cam). Probably preferred over the middle of the line(RPM) cam. The 2nd one isn't to bad though, not over lapping duration(full Race) but you would lose some bottom end for some mid & top end.

Rick
Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Crower camshafts for the 2.3 Duratec grunt98444 DOHC - 2.3L Duratec / Mazda L Engines 2 04-25-2012 05:52 AM
whats the difference between these 2 trannies? *pic* DSMissed Drivetrain Tech 26 01-11-2010 06:47 PM
Difference in these shocks: taknotes Suspension Tech 14 12-14-2007 01:51 PM
Difference in these tires? 0RangerEdge2 Wheels & Tires Semi-Tech 5 10-22-2006 09:36 PM
Camshafts???? ToughFord 4.0L OHV & SOHC V6 Tech 4 11-14-2005 02:13 AM


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 04:25 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.