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Custom Dodge Ram Performance Mods - Engine - 3.7 Liter V6 Discuss modifying your Dodge Ram with Performance Parts and Accessories!
Factory Spec: 3.7-liter V6 engine - 210 horsepower, 235 lb-ft of torque.


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  #1  
Old 09-10-2011, 06:18 PM
chambers chambers is offline
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Default 3.7 performance mod list

Maybe this should get a sticky to make it easier to find. There are a good amount of mods that you can get for the 3.7 here is a list:

-Tuner either from hemifever for earlier years of the 3.7 or now hypertech has a tuner for 07-10 3.7's. As for the Jet chip I dyno'd one as I had it before there were tunes available and it showed gains only above 4k rpm on the dyno.
-Ported fastman throttle body, more air in just like the intake should help with power.
-Cold air intake, there are a lot of choices as you can easily make a 4.7 or 5.7 intake fit as long as the throttle body and air filter locations are the same as on your truck. I used a spectre intake for a hemi on my 3.7 and just had to use a big coupler from home depot to get the throttle body and intake tube lined up.
-Electric fan conversion. For this you remove the clutch fan that cools the engine and replace it with a electric fan and controller that tells it to turn on and off when needed. This can be done for as little as $100 with a ford taurus 3.8 fan, wiring, and a cheap controller. You can also buy the black magic 180 kit, but that costs a bit more. This was the only mod on my truck to increase my mpg, went up 1.5 mpg.
-Exhaust, there are shorty headers from jba which I posted about in the exhaust section. Pair them with a magnaflow y-pipe and muffler and you'll have some more grunt.
-Underdrive pulley, both ASP and ATI have underdrive pulleys that fit the 3.7. I'm not 100% on which years they fit, but I have the ASP on my 04 and it gave it some more grunt.
-Regearing, you can regear the rear end to give you more grunt and help alleviate loss of power from bigger tires, I went from 3.55 to 4.10 in my truck. If you do this the most important thing is to find a good installer who works on dodge 9.25 rears often.
-180 thermostat, not really sure what performance this gives but it was recommended with my tuning so I replaced the oem with a stant 45358. All I had to do was drill a bleed hole in it to match the stock t-stat and put it in.
-Cams, you can get stock cams reground and should be able to get more power from the truck. It will require running lash caps and can be quite expensive especially if you can't do the install yourself. I talked to both Crower and Crane about doing regrinds, but decided against it just because it was going to cost so much for the cams, then regrind, then install and I wasn't even sure if I would get good enough power to make the investment worth it.

If anyone knows of any others post them up.

Last edited by chambers; 09-10-2011 at 06:24 PM.
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Old 09-11-2011, 11:00 AM
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Good list, thanks for posting that and now that I know there is a tuner available, that may just change my perspective on things lol!

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  #3  
Old 10-28-2011, 11:47 PM
thumperdude12 thumperdude12 is offline
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Default electric fan ?

Quote:
Originally Posted by chambers View Post
Maybe this should get a sticky to make it easier to find. There are a good amount of mods that you can get for the 3.7 here is a list:

-Tuner either from hemifever for earlier years of the 3.7 or now hypertech has a tuner for 07-10 3.7's. As for the Jet chip I dyno'd one as I had it before there were tunes available and it showed gains only above 4k rpm on the dyno.
-Ported fastman throttle body, more air in just like the intake should help with power.
-Cold air intake, there are a lot of choices as you can easily make a 4.7 or 5.7 intake fit as long as the throttle body and air filter locations are the same as on your truck. I used a spectre intake for a hemi on my 3.7 and just had to use a big coupler from home depot to get the throttle body and intake tube lined up.
-Electric fan conversion. For this you remove the clutch fan that cools the engine and replace it with a electric fan and controller that tells it to turn on and off when needed. This can be done for as little as $100 with a ford taurus 3.8 fan, wiring, and a cheap controller. You can also buy the black magic 180 kit, but that costs a bit more. This was the only mod on my truck to increase my mpg, went up 1.5 mpg.
-Exhaust, there are shorty headers from jba which I posted about in the exhaust section. Pair them with a magnaflow y-pipe and muffler and you'll have some more grunt.
-Underdrive pulley, both ASP and ATI have underdrive pulleys that fit the 3.7. I'm not 100% on which years they fit, but I have the ASP on my 04 and it gave it some more grunt.
-Regearing, you can regear the rear end to give you more grunt and help alleviate loss of power from bigger tires, I went from 3.55 to 4.10 in my truck. If you do this the most important thing is to find a good installer who works on dodge 9.25 rears often.
-180 thermostat, not really sure what performance this gives but it was recommended with my tuning so I replaced the oem with a stant 45358. All I had to do was drill a bleed hole in it to match the stock t-stat and put it in.
-Cams, you can get stock cams reground and should be able to get more power from the truck. It will require running lash caps and can be quite expensive especially if you can't do the install yourself. I talked to both Crower and Crane about doing regrinds, but decided against it just because it was going to cost so much for the cams, then regrind, then install and I wasn't even sure if I would get good enough power to make the investment worth it.

If anyone knows of any others post them up.
I was wondering what kinda wiring and controller i would need for the electric fan? thats about the only thing i havent done and never even thought about it. thanks
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  #4  
Old 10-29-2011, 12:35 AM
thumperdude12 thumperdude12 is offline
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Default

Quote:
Originally Posted by chambers View Post
Maybe this should get a sticky to make it easier to find. There are a good amount of mods that you can get for the 3.7 here is a list:

-Tuner either from hemifever for earlier years of the 3.7 or now hypertech has a tuner for 07-10 3.7's. As for the Jet chip I dyno'd one as I had it before there were tunes available and it showed gains only above 4k rpm on the dyno.
-Ported fastman throttle body, more air in just like the intake should help with power.
-Cold air intake, there are a lot of choices as you can easily make a 4.7 or 5.7 intake fit as long as the throttle body and air filter locations are the same as on your truck. I used a spectre intake for a hemi on my 3.7 and just had to use a big coupler from home depot to get the throttle body and intake tube lined up.
-Electric fan conversion. For this you remove the clutch fan that cools the engine and replace it with a electric fan and controller that tells it to turn on and off when needed. This can be done for as little as $100 with a ford taurus 3.8 fan, wiring, and a cheap controller. You can also buy the black magic 180 kit, but that costs a bit more. This was the only mod on my truck to increase my mpg, went up 1.5 mpg.
-Exhaust, there are shorty headers from jba which I posted about in the exhaust section. Pair them with a magnaflow y-pipe and muffler and you'll have some more grunt.
-Underdrive pulley, both ASP and ATI have underdrive pulleys that fit the 3.7. I'm not 100% on which years they fit, but I have the ASP on my 04 and it gave it some more grunt.
-Regearing, you can regear the rear end to give you more grunt and help alleviate loss of power from bigger tires, I went from 3.55 to 4.10 in my truck. If you do this the most important thing is to find a good installer who works on dodge 9.25 rears often.
-180 thermostat, not really sure what performance this gives but it was recommended with my tuning so I replaced the oem with a stant 45358. All I had to do was drill a bleed hole in it to match the stock t-stat and put it in.
-Cams, you can get stock cams reground and should be able to get more power from the truck. It will require running lash caps and can be quite expensive especially if you can't do the install yourself. I talked to both Crower and Crane about doing regrinds, but decided against it just because it was going to cost so much for the cams, then regrind, then install and I wasn't even sure if I would get good enough power to make the investment worth it.

If anyone knows of any others post them up.
oy yea another thing what do i do with the clutch fan on it? just take it off and the cover.
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  #5  
Old 10-29-2011, 06:45 PM
chambers chambers is offline
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Quote:
Originally Posted by thumperdude12 View Post
oy yea another thing what do i do with the clutch fan on it? just take it off and the cover.
This is a the page that I used http://www.fordmuscle.com/archives/2...cfan/index.php and followed their wiring diagram pretty much too the letter. The clutch fan does come off, some people keep the shroud on to direct airflow or mount the e-fan in. You can mount the fan to the radiator and pull the shroud if you like.
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Old 11-05-2011, 04:03 PM
thumperdude12 thumperdude12 is offline
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Quote:
Originally Posted by chambers View Post
This is a the page that I used http://www.fordmuscle.com/archives/2...cfan/index.php and followed their wiring diagram pretty much too the letter. The clutch fan does come off, some people keep the shroud on to direct airflow or mount the e-fan in. You can mount the fan to the radiator and pull the shroud if you like.
Thanks, one more question before i take the fan off. Is the pulley bolted on? it looks like the fan bolt holds the pulley on and i was wondering before i get started doing this if i would have to find a left hand threaded nut that big to hold the pulley on.
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Old 11-06-2011, 11:52 AM
chambers chambers is offline
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The fan is bolted on to the pulley, you can make a spanner to hold it and get an extra pair of hands to help you. The pulley is attached to the water pump and will nut come off once the fan is removed. I put a couple of bolts through the holes in the pulley, wedged a pry bar there and had someone hold it, put a pipe wrench on the nut, smacked it w/ a mallet and it broke free. There are threads on it on dodge forum and dodge talk, maybe here too I haven't searched.
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Old 11-06-2011, 01:06 PM
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916Timmy 916Timmy is offline
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Thanks for this info! There isn't a lot of threads out there for 3.7 parts!

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Old 11-06-2011, 09:25 PM
chambers chambers is offline
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Quote:
Originally Posted by 916Timmy View Post
Thanks for this info! There isn't a lot of threads out there for 3.7 parts!

No problem, not many people give the 3.7 any credit. Since I can't edit the OP I'd like to mention that the 4th gen 3.7 rams already have the clutch fan eliminated w/ an e-fan used for cooling the motor. Flex a lite also makes a kit specifically for the ram now, part #183, so if you have a 3rd gen 3.7 it's an option as well as the junkyard fan.
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Old 11-06-2011, 09:59 PM
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Quote:
The clutch fan does come off, some people keep the shroud on to direct airflow or mount the e-fan in. You can mount the fan to the radiator and pull the shroud if you like.
Just want to comment that you really should have a shroud around the fan, it makes a drastic difference.

Sound like a great list to wake up the 3.7L. Only thing I'd add is headwork...
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