Couple questions on a boosted 5.9 Magnum build.
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Veteran
Joined: Jan 2010
Posts: 260
Likes: 1
From: Wisconsin
That would be the whole idea :P
Now to try and find a Mopar Performance PCM for a 92 Dakota to match the engine... The 95 Ram PCM is for a 5.9 and it runs a little rich. It even surges a little while cruising; seems it can`t quite trim the fuel table enough for the 318... Plus it`s a cold blooded pig when it`s in closed loop
Heck I would even trade someone straight up for a 92-95 PCM for a 318. I`d imagine there`s gotta be someone around here that`s done a 360 swap and wouldn`t mind a PCM for one...
Now to try and find a Mopar Performance PCM for a 92 Dakota to match the engine... The 95 Ram PCM is for a 5.9 and it runs a little rich. It even surges a little while cruising; seems it can`t quite trim the fuel table enough for the 318... Plus it`s a cold blooded pig when it`s in closed loop
Heck I would even trade someone straight up for a 92-95 PCM for a 318. I`d imagine there`s gotta be someone around here that`s done a 360 swap and wouldn`t mind a PCM for one...
Administrator
Joined: Apr 2010
Posts: 87,483
Likes: 4,223
From: Clayton MI
Reflash the PCM for the 318? hemifever should be able to hook you up. PM him here on this site. 
Runs 275 for a canned tune. (for a basically stock motor. I.E. Not internal mods.) 375 for a custom tune.
Runs 275 for a canned tune. (for a basically stock motor. I.E. Not internal mods.) 375 for a custom tune.
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Veteran
Joined: Jan 2010
Posts: 260
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From: Wisconsin
I`ll probably have to go with custom tune... I did a lot of work reshaping the top sides of the ports and opened up the pushrod pinch pretty darn good. Plus the 01 360 cam has nearly .060 more gross valve lift on the intake side, about 10* more duration, and I advanced it 6*. If he could open the rev limiter up to 6k, I think that would help a lot too. I know the old LA 318s were good for about 5600rpm out on the 1/4 mile oval without modifications; I`d imagine 6k periodically wouldn`t kill it
Legend
Joined: Jul 2007
Posts: 7,843
Likes: 13
From: DFW, Texas
SCT can't tune your OBD-1. Folks never bother to think about that when they suggest it. They think all 2nd gens are OBD-II.
A FAST, Bigstuff, or Megasquirt standalone might be your best bet. By the time you pay B&G to get it dialed in, you may have aready spent enough to do it yourself with the standalone.
A FAST, Bigstuff, or Megasquirt standalone might be your best bet. By the time you pay B&G to get it dialed in, you may have aready spent enough to do it yourself with the standalone.
Administrator
Joined: Apr 2010
Posts: 87,483
Likes: 4,223
From: Clayton MI
SCT can't tune your OBD-1. Folks never bother to think about that when they suggest it. They think all 2nd gens are OBD-II.
A FAST, Bigstuff, or Megasquirt standalone might be your best bet. By the time you pay B&G to get it dialed in, you may have aready spent enough to do it yourself with the standalone.
A FAST, Bigstuff, or Megasquirt standalone might be your best bet. By the time you pay B&G to get it dialed in, you may have aready spent enough to do it yourself with the standalone.
Ooops. Minor details. And yes, it does rate being said twice.
See if you can find a PCM out of an older truck??
Champion
Joined: Jun 2004
Posts: 2,811
Likes: 2
From: Ft Campbell, KY/TN
I'm not a well read FI guy, so I figured I may as well ask. The fuel pressure range for the Magnum engines in the trucks is 35-45psi, whereas the range for the Intrepids is 44-54psi. My question is if the fuel pump in the car is pushing the high side, will that extra 9psi put a strain on the stock injectors? Also, will it throw the PCM for a loop?
Before I forget I need to ask about how I plan to set up the exhaust, I am going to put an x-pipe in almost imediately downstream and use this as a point to put the upstream O2 (to mimick the 2in 1out style cat). Now the question is, do I have to worry about not having a downstream O2? If so is there a way to remedy the problem (O2 simulator)?
BTW- The PCM is out of a 95 1500 rcsb and I will have the complete wiring harness to play with. Which also brings up another question, does anyone know if B&G can work with the older style PCMs? Or will it hold me back? If so, I'll look for a PCM/harness out of a 96 or later truck for the performance build and run this one in it for now...
Oh, and for when I get this 360/408 (whatever I end up with) project going, how do I get the boost into the engine? Is there a bolt on adapter/elbow for the TB? I was looking at how to make one and it looks simple enough. Or is there a certain aftermarket TB that I will need???
Say, RM_Indy, do you think parallel 60/60/VGT turbos will be a little much? I guess my thoughts are if I'm pushing one to 45psi on my diesel to get 422rwhp/903ft-lbs (and still feel safe about trying for the 500hp mark), that pushing two to produce a much more modest 15-20psi will still net about the same flow? Or am I asking too much of the block/heads/headgaskets to handle that kind of boost? Plan is for CR in the 8.5-9:1 area and to run it on E85...
Before I forget I need to ask about how I plan to set up the exhaust, I am going to put an x-pipe in almost imediately downstream and use this as a point to put the upstream O2 (to mimick the 2in 1out style cat). Now the question is, do I have to worry about not having a downstream O2? If so is there a way to remedy the problem (O2 simulator)?
BTW- The PCM is out of a 95 1500 rcsb and I will have the complete wiring harness to play with. Which also brings up another question, does anyone know if B&G can work with the older style PCMs? Or will it hold me back? If so, I'll look for a PCM/harness out of a 96 or later truck for the performance build and run this one in it for now...
Oh, and for when I get this 360/408 (whatever I end up with) project going, how do I get the boost into the engine? Is there a bolt on adapter/elbow for the TB? I was looking at how to make one and it looks simple enough. Or is there a certain aftermarket TB that I will need???
Say, RM_Indy, do you think parallel 60/60/VGT turbos will be a little much? I guess my thoughts are if I'm pushing one to 45psi on my diesel to get 422rwhp/903ft-lbs (and still feel safe about trying for the 500hp mark), that pushing two to produce a much more modest 15-20psi will still net about the same flow? Or am I asking too much of the block/heads/headgaskets to handle that kind of boost? Plan is for CR in the 8.5-9:1 area and to run it on E85...
I have a MOPAR PCM for a 1996 dodge ram, Auto 4x4, 5.2. If you want that for your build, I will sell it for 50 bucks. You can get a wiring harness from www.car-part.com for about 200-250.
As for the FI, I run FMS 24# injectors, and the PSI for my old 1996 (5.2) was 49 PSI, and my 2001 (5.9) is the same. i have a set of stock 2001 5.9 injectors. If you are going boost, those pencil type injectors are the way to go. I will throw those injectors in for an extra 20 (you will need EV6 connectors). If you are bumping the fuel pressure, then you MIGHT not need bigger injectors.
Here is a good video on injectors.
http://www.youtube.com/watch?v=Emnax2J4FX4
that guy's website www.fuelinjectorconnection.com
Also
www.fiveomotorsports.com
that guy rebuilds injectors and he has some good ones that look like they are tailored for boost (pencil stream instead of an atomized spray). Since the boost creates violent turbulence, it will atomize the fuel.
cmckenna is the resident expert on fuel injection, and he is moving across the country. He will probably chime in when he gets settled down.
--Dan
