I went to the dyno today.......
#1
I went to the dyno today.......
First off, I recieved permission to post this outside of the vendor forum (thanks C).
I went to the dyno today to test my underdog pulley. I tested on a 2002 Ranger Automatic with 50,000 miles. I just changed the oil a few weeks ago with full synthetic 10w30. I changed the plugs today before going with oem motorcraft plugs. That is it. No intake, exhaust, etc in this truck. It is all stock and has a hard life towing granite everyday.
Base line was 122.5 HP and 143.5 Torq
After the underdog pulley it was 130.9 HP and 154.6 Torque.
That is a gain of 8 HP and 11 Torq. I had guessed 5-7 so I was pleased. I get numerous e-mails and PM's that ask this question so I finally got it done.
A special Thanks to Maxwell Dodge SuperStore in Austin, TX. They allowed me to change the pulley with the truck strapped down so I didn't have to pay for 2 separate dyno sessions. It is a dyno Jet.
i am working on scanning the dyno sheet in so I should have more info later.
Thanks.
I went to the dyno today to test my underdog pulley. I tested on a 2002 Ranger Automatic with 50,000 miles. I just changed the oil a few weeks ago with full synthetic 10w30. I changed the plugs today before going with oem motorcraft plugs. That is it. No intake, exhaust, etc in this truck. It is all stock and has a hard life towing granite everyday.
Base line was 122.5 HP and 143.5 Torq
After the underdog pulley it was 130.9 HP and 154.6 Torque.
That is a gain of 8 HP and 11 Torq. I had guessed 5-7 so I was pleased. I get numerous e-mails and PM's that ask this question so I finally got it done.
A special Thanks to Maxwell Dodge SuperStore in Austin, TX. They allowed me to change the pulley with the truck strapped down so I didn't have to pay for 2 separate dyno sessions. It is a dyno Jet.
i am working on scanning the dyno sheet in so I should have more info later.
Thanks.
#7
The cool thing was the dyno guy said he could feel the difference in the runs. I have to go to the track to "see" a difference. I can't feel diddly. Even though he works at Dodge (where the dyno is), it turns out he has a 4.0 Sport Trac. I think I sold my frst 4.0 pulley when they become available.
#8
#9
#12
#13
Originally Posted by TReff
how does the pully effect your charging system???
I run 6 KC lights, a CB and 500 watt linier, 300 watt amp... will it keep up!?!( not all at the same time ...although it has been done!!)
I run 6 KC lights, a CB and 500 watt linier, 300 watt amp... will it keep up!?!( not all at the same time ...although it has been done!!)
If you want to buy one, I would offer you a buy back guarantee and this issue would be settled once and for all.
#14
thats what i need to know... thanks alot Wayne.. I will definatly be getting one in the next month!
you should see my lights dim at idle now ...lol thats why i was wondering... but i am usually not idleing with them all on at the same time...
again thanks Wayne .. looking forward to doing business with you soon..
you should see my lights dim at idle now ...lol thats why i was wondering... but i am usually not idleing with them all on at the same time...
again thanks Wayne .. looking forward to doing business with you soon..
#15
Originally Posted by Gearhead61
Impressive! Think we can expect the same sort of gain from a 4.0 pully?
The 4.0 is Better. The 4.0 Pulley has already been dynoed on a 4.0 Mustang and it got 12 and 16! The downside is it will be in the $280 range since it has a built in harmonic balancer. The 3.0 pulley is just an outstanding value the the price per HP.
Originally Posted by Gearhead61
Does the 3.0 pulley make any noticable difference in the accessories? Like the A/C or anything?
One customer I installed an UnderDog Pulley for thought the power steering worked better. He thought it was "overcharging" before because it squeeled all the time. I cannot confirm or deny this, just passing the info on.
#16
Originally Posted by Strider0O0
any idea when the 4.0 pully will be coming????
#18
Originally Posted by Flyinfx4
What all is involved in changing out the pulley's?
https://www.ranger-forums.com/forum2...ead.php?t=9112
#19
Originally Posted by RdNkHunter
Have you noticed anything that you dont like about it? The only thing that I read that has any kind of negative effect is that the alternator may not charge if you are just idling at a light since the speed the belt spins at is too low. Not sure if thats true tho.
#22
Originally Posted by HarryTasker
12 hp for $280 isn't bad. Do you know if there will be a group buy discount?
#24
#25
Originally Posted by graniteguy
Base line was 122.5 HP and 143.5 Torq
After the underdog pulley it was 130.9 HP and 154.6 Torque.
That is a gain of 8 HP and 11 Torq. I had guessed 5-7 so I was pleased. I get numerous e-mails and PM's that ask this question so I finally got it done.
After the underdog pulley it was 130.9 HP and 154.6 Torque.
That is a gain of 8 HP and 11 Torq. I had guessed 5-7 so I was pleased. I get numerous e-mails and PM's that ask this question so I finally got it done.
Thanks, Wayne!
now I really must to find time to put it on this week.