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  #13  
Old 10-28-2010, 08:58 AM
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Re: 5.9 Engine Mods

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Originally Posted by Jeep95XJ View Post
KOLAK seems to be the only one who really loves the M1 on a pretty much stock motor. IMO the Hughes/Edelbrock airgap manifold is the way to go. When i have an extra $600 laying around thats the manifold oll be going with lol. The M1 DOES help over 3500 rpm or so but seems to hurt lower end some. The Hughes?Edelbrock combo seems to pretty much leave low end alone and kick in about 2500 rpm and helps above there. The 5.9 is an animal off the line but no so much top end. Helping off the line power isnt the concern here, the top end is. The sooner you can get the manifold to start doing it's job the better off you will be. Add an underdrive crank pulley to your list of things to do. I bought it but havent installed it yet. From what i understand they make quite a bit of difference. I ported my kegger and it really wasnt that bad. I bought an extra so i had no down time and just went to town on it. Tanked it, sand blasted it, cut the divider out, cut the intake runers down, smoothed everything out, blasted it again, blew it all out with air, put it in the dishwasher lol. Wanted to make sure ALL the media was out of the runners. Probably spent 10-12 hours doing it. It's free horsepower im not worried about the time plus you can say you did it. IF anyone does decide to port the kegger it's more than just runners and a ported kegger on a 5.2 is not the same as on a 5.9 Anyone interested in learing about it or has questions can feel free to PM me. Anyway here are a few links for you

http://www.hughesengines.com/Index/p...=&partid=24773

http://cgi.ebay.com/ebaymotors/MOPAR...Q5fAccessories

Only use the crank pulley and do whatever with the alternator pulley. Using the alternator pulley CAN cause charging problems. Not saying it will but why take the chance for the 1 ish HP gain you get out of it. According to what i have read, the crank pulley is good for 10 HP and 25 FT lbs. Worth the $65 any day all day. Maybe someone who has already installed them can add a little more about them. I duno when ill get around to installing mine. New damper is going on at the same time.

Here are a few pix of the manifold.
Nice job with the kegger! Looks good and I'm sure it performs well. I hand ported a set of cylinder heads for my old Ford years ago when I rebuilt the motor and I spent in excess of 20 hours behind a die grinder on those. Worth the payoff, but a lot of work. This was before Edelbrock and others offered aluminum heads for that particular engine.

Again, at the risk of sounding defensive on Kolak's behalf, he NEVER recommended the M1 on a stock motor. He gave me pretty much the entire list of mods you guys have mentioned (including the UD crank pulley) and said that the M1 would be the next step AFTER all those are done. Well, I got all those mods and I was looking for the next step. Since I'm not ready to delve into the heads/cam territory, I figured this was the next step.

To be honest, I didn't even know about the Hughes/Edelbrock offering. The main difference I see is that the Hughes is a high-rise dual-plane while the M1 is a single-plane. This would definitely support your theory of the Hughes having a slight edge at lower RPM's. However, I will remind you that the Hughes is just an Edelbrock Performer RPM Air-Gap manifold with a throttle body adapter bolted to it (and some extra bolt holes). These manifolds were not designed for low-RPM operation, either. Bottom line, IF i had known about the Hughes manifold, I MIGHT have gone for it. My decision would have been harder, let's put it that way. One other thought I will leave you with on this subject is that dual-plane manifolds are generally NOT recommended for port-injected motors. You want as even of air distribution as you can get with a port-injected motor and dual-plane manifolds, BY DESIGN, do not offer very even distribution.

Now, I might wind up getting the UD pulley now that you guys mention it. My only fear is (as I'm sure it is with about anyone who gets UD pulleys) is accessory performance suffering. I recently fried my alternator that took my Optima RedTop with it and replaced it with a 200-amp unit and a YellowTop. I have a VERY healthy sound system in it and I'm just afraid the UD crank pulley would overstress my alternator. I'm sure the A/C compressor would be fine, but I also have my doubts about the P/S pump. I dunno. Anyone have any experience here? I'd sure like to pick up the easy ponies by bolting that $50 pulley on, but I'm not sure I wanna do it if it's gonna create a whole bunch of problems on the accessory drive.
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Old 07-28-2011, 10:45 AM
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Re: 5.9 Engine Mods

I had the M1 on my 5.9 as well. I also had the Holley TB, Leach headers, K&N FIPK, and Mopar ECU. If you really want to take advantage of the M1, and the 5.9 really, get a set of heads. I think the Edelbrock heads are a close copy of the Mopar aluminum ones and are a good price.

I miss my 5.9
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Old 07-28-2011, 11:52 AM
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Re: 5.9 Engine Mods

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Originally Posted by hound View Post
I had the M1 on my 5.9 as well. I also had the Holley TB, Leach headers, K&N FIPK, and Mopar ECU. If you really want to take advantage of the M1, and the 5.9 really, get a set of heads. I think the Edelbrock heads are a close copy of the Mopar aluminum ones and are a good price.

I miss my 5.9
I'm pretty confident the Mopar aluminum heads ARE the Eddy heads, just with different badging and subsequently, pricetag. I believe the main reason for the Mopar heads is if you're doing some class racing that requires OEM-based parts...or just have money to burn.
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Old 07-28-2011, 12:22 PM
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Re: 5.9 Engine Mods

The Mopar heads came way before the Edelbrock's. If I remember right, Edelbrock pretty much just copied the Mopar design.
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Old 07-28-2011, 06:17 PM
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Re: 5.9 Engine Mods

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Originally Posted by hound View Post
The Mopar heads came way before the Edelbrock's. If I remember right, Edelbrock pretty much just copied the Mopar design.
Are you sure you're not talking about the iron RT heads?
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Old 07-28-2011, 08:51 PM
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Re: 5.9 Engine Mods

I have the 5.9 in my RAM. And I have 1.7 hs ,fasten throttle body , sct tuner and edelbrock airgap fi. On Hughesengines.com it made a huge improvement in power one of my fab mods. Next I need proper gearing to take advantage of all my mods
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Old 07-29-2011, 12:31 AM
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Re: 5.9 Engine Mods

Both the iron and aluminum Mopar heads came years before the Edelbrock heads came to market.
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