View Full Version : How do you tell if you have the HO 4.7???

05-28-2011, 10:35 PM
Boy, this seems like the stupidest question ever. I would think the obvious answer is that it would have "HO" or "High Output" plastered on it somewhere but I have Googled and searched here and haven't really found anything.

Am I correct in thinking that the 4.7L engine is officially and largely called the Powertech engine (just like the description in the top right corner of my bio says, lol) but is also commonly referred to as the Magnum in Ram trucks? So the appearance of "Magnum" on the engine does not mean it is the HO version?? So how do you tell?


05-28-2011, 10:37 PM
The "Magnum" series of engines went by the wayside as the 2nd generation trucks were phased out. The 360/5.9L gas engine was part of the "Magnum" family of engines.

05-28-2011, 11:02 PM
have you sent off for you build sheet ( that might have the info on it.

05-29-2011, 09:15 AM
Maddog, yeah when I search for Ram Magnum engine the older truck is about all I find. But my engine says "Magnum" on the intake resonator.

jc4041, no I haven't tried that. Can they print that off for me locally?

05-29-2011, 09:19 AM
Just click on the "build sheet" link in jc4041's post, takes ya right to the info you can fill out and I believe they e-mail it to you.

- Cajun

05-29-2011, 11:03 AM
Just click on the "build sheet" link in jc4041's post, takes ya right to the info you can fill out and I believe they e-mail it to you.

- Cajun

^^^^what she said lol....but I'm pretty sure the dealer can print it out....unless they are complete DB's

05-29-2011, 10:11 PM
mine says magnum on the cover too hmmm

05-29-2011, 10:41 PM
I filled out for the build sheet first thing one morning and got it emailed to me the same day.

05-29-2011, 11:25 PM
I was thinking (and hoping, lol) that the Magnum was the name of the HO 4.7 but I don't think that is going to be the case. Powertech is obviously the official name for this engine family and I think Magnum is just a name stuck to the Powertech engines that were put in Ram trucks. I don't know this for sure though. I have seen some photos of the HO 4.7 in Jeeps and the resonator on those engines actually says "High Output" on it. I can't seem to find a photo of a 4.7 HO in a Ram though. I'm going to try to get my hands on my build sheet tomorrow if the dealership is open or if not the next day.

05-29-2011, 11:35 PM
4.7 HO/Magnum A "High-Output" version of the 4.7 L PowerTech engine, producing 265 hp (198 kW) and 330 ftlbf (448 Nm) of torque, was introduced in 2002, first appearing in the Jeep Grand Cherokee Overland.


2002–2004 Jeep Grand Cherokee
2005–2007 Dodge Dakota
2002–2007 Dodge Ram 1500
2006–2007 Mitsubishi Raider

4.7 L PowerTech V8 engine in a Jeep Grand CherokeeThe 4.7 liter version was the first of this family, appearing in the 1999 Jeep Grand Cherokee. The displacement is 287 cubic inches (4698 cc) with a bore of 3.66 in (93 mm) and a stroke of 3.405 in (86.5 mm). It has a cast iron block and aluminum heads with two valves per cylinder. It uses a chain-driven overhead camshaft. It originally produced 235 hp (175 kW) and 295 ftlbf (400 Nm) of torque. The 2010 4.7l has 2 valves and 2 spark plugs per cylinder and puts out 302 hp (225 kW) and 329 Lb. Ft. Dodge has claimed that it has increased compression ratio and improved cylinder head port flow, the 4.7 L V8 is available with three transmissions.

The PowerTech was on the Ward's 10 Best Engines list for 1999.

1999–2009 Jeep Grand Cherokee
2000–present Dodge Dakota
2000–2009 Dodge Durango
2002–present Dodge Ram
2006–2009 Jeep Commander
2007–2009 Chrysler Aspen

05-30-2011, 09:14 AM
That wikipedia article is what made me think maybe the Magnum and HO were the same because they basically lump them into the same description. I hadn't seen the allpar article but it must be older because it references the HO engine being Jeep only which contradicts wikipedia and the fact that I have seen HO Dakotas. So....I still don't know, lol.

05-30-2011, 11:09 AM
kid at work has a HO Dakota....he wants to race my wife's Charger (HO 3.5)

06-01-2011, 01:26 AM
Well I got my build sheet in my email today but it still didn't exactly clear things up. Near the top it lists....

"A82P 4.7L Eng (EVA)"

and then a ways down below that it says....

"EVA 4.7L V8 MPI Engine"

While Googling I found a Yahoo answers post that stated that the standard Magnum engine uses code (EVA) and the high output engine uses code (EVC). I don't know if this person knows what they are talking about though because the rest of their response was full of incorrect information, lol. All things considered and given that my build sheet doesn't say "high output" anywhere on it, I'm fairly certain I have the standard 4.7.

I'm still curious though. Maybe I haven't Googled enough but I have yet to run across a Ram owner with the HO 4.7. Likewise, I haven't found any photos or Rams with "high output" badges on the body or engine. I'm going to call the dealership tomorrow and see if they can tell me anything.

06-01-2011, 05:53 AM
pretty sure if you go to KBB and then click the "free carfax" thing you can put your VIN in and when it pops up it'll be in the top right. That's how we found out the kid I mentioned earlier had the HO in his Dakota

06-01-2011, 10:11 AM
I called the dealer this morning and left the service manager a message. He called me back within about 30 minutes. He confirmed when looking at your build sheet (EVA) is the code for the standard engine and (EVC) is the code for the high output.

Case closed I guess. Don't know why I'm disappointed, lol. It's not like it was going to make my truck any faster if I found out it was HO!!

Thanks for all the replies.

06-06-2011, 10:42 PM
I have not looked at my stock intake cover sense I bout the truck brand new, and switched it out to the Airaid, about a month later, so I could be wrong but I do beleive mine said Magnum, High Out put, I can confirm later though.

06-06-2011, 11:14 PM
Lucky you, lol. I'm envious. The link to get your build sheet that was posted earlier in this thread works great. I sent it in one day and got it the next. Sounds like you should see engine code (EVC) on yours. Congrats.

06-07-2011, 10:37 PM
My 02 4.7 Dakota said powertech on the air hat but my 05 Ram says magnum I believe I gotta check tom. maybe I have the HO I always just thought my Ram was just as if not quicker b/c of the 5speed tranny insteand of the 4speed or that my ass dyno just felt it as faster being bigger you guys have really intrigued my interest into this subject hmm please let us know if anyone can figure out a way to tell besides getting a buildsheet

06-08-2011, 08:24 AM
Getting the build sheet through email is really very simple and quick and it's neat to have. You can can also have the service dept at your local dealer print it off for you or you can call them and they can look it up and tell you over the phone. Depending on who you talk to they may or may not know much about the HO engines and codes but all you need is for them to tell you of it is code EVA or EVC.

I'm sure there is a way to tell just by looking but I don't know what it is. The lack of information on this engine in Ram trucks makes me wonder if it was a relatively small percentage of Rams that got this engine. Let us know!

06-09-2011, 07:39 PM
I have the 4.7 Magnum air hat, but the EVA engine code. I used the build sheet link - got a response within 48 hours AND included a recall service that hasn't been completed on my 2006 (passenger seat belt).

Thanks for the post.

06-09-2011, 10:57 PM
I have the 4.7 Magnum air hat, but the EVA engine code. I used the build sheet link - got a response within 48 hours AND included a recall service that hasn't been completed on my 2006 (passenger seat belt).

Thanks for the post.

Nice good thing ya got that taken care of. I emailed my dealer last night the dealer rep called me this mornin asking what a build sheet was and she was completley clueless :doh: never got a call back or an email time to try a different dealer

06-12-2011, 02:58 PM
My truck is an '06 4.7 and it said 'MAGNUM' on the big airbox (that it no longer has.) I'm pretty sure mine is the LOW OUTPUT. I'm looking for a decal of a turtle that I can put '4.7 on.

06-12-2011, 03:00 PM
Oh yah, and I hear the H.O. 4.7's have 2 spark plugs per cyclinder. 1 set on top, and the other set you can only see from under the truck. I have not confirmed this though.

06-12-2011, 03:12 PM
In 2008 all 4.7 engines have 2 plugs per cylinder.EGR and knock sensors were added in 2005. In model year 2008, Chrysler replaced the 4.7 liter V8 with a new version. Power went from 230 hp to 290 hp (and up to 320 lb-feet of torque) with that move; gas mileage went up, and noise and vibration went down. The new 4.7-liter V-8 features 5.7-Hemi features such as two spark plugs per cylinder, with a high 9.8:1 compression ratio, and better port flow; but it has a new slant/squish combustion system design.

06-14-2011, 12:38 AM
I have done extensive searching on the web to find out if the '02 Jeep that was advertised as having a 4.7HO was actually a HO. What I'd found was if you look at the VIN the 8th digit (signifies engine family) needs to be a "J" to be a 4.7HO which is as you stated an EVC code. The non HO I believe is "N". The VIN is the easiest way to determine what the vehicle was built with. This link I found it pretty cool to decode a VIN. Plug the VIN in and it will actually bring up the build sheet with all the factory codes for the accessories, paint, interior, etc. It's not just what is available, it is the actuall build sheet. The jeep by the way does have the 4.7HO.

06-14-2011, 12:50 AM
If anyone has a cheap car with the R code let me know...LOL