What's different from Magnum vs non 360? - Pirate4x4.Com : 4x4 and Off-Road Forum

Daren Rabago · 11-24-2001, 06:34 PM

Hello, there is a newbie around! I am a newbie to the board, and to Mopars, and have a question.

I have a 1991 Dodge W-250 with a 360 gas throttle body injected motor. It is a complete slug. I was wondering if anybody knows what the difference between a Magnum 360 and the non-Magnum is, if a non -Magnum can be converted, if I'm just wasting my time, or if there are any other possibilities to gain some power. (Only minor engine mods are done right now, with K&N, 3 inch cat back, and 4.10 gears.)
Any answers or help would be welcome!

Thanks-DR

FULLSIZE · 11-25-2001, 02:44 AM

are you sure it is a tbi? i thought 91 has mpi. i could be verywell wrong. anyone? if its tbi, i dont know how well the computer can handle mods. the mpi can handle very few before it gets out of whack. let me know if tbi or mpi.

Daren Rabago · 11-26-2001, 08:08 PM

Well, maybe I'm confusing my terms. It's a fuel injection system that basically looks like an electronic carb, and for all I can tell it looks like a small 2-barrel. I first thought it was a carb, and when I bought the truck was intending to swap to a 4-barrel, and possibly install a set of Mopar Perf heads from a fairly new 360 crate motor. Then I started looking, and realized it was efi! I felt like a moron then. From what I can tell, all the minor power upgrades for spacing the throttle body are for later injection systems. So maybe I have the the terms mixed up. (It does look like a Holley Throttle body though.) I guess I should also specify that the truck is a driver, and is used to tow a CJ-5 or a Suzuki Sam, although it has found it's way onto a trail or two.
Thanks for the help so far.
DR

Semi-Tuf-Jeep · 11-28-2001, 08:15 AM

Hey DR:
I'm relatively new to Mopars as well, but I submitted the post that questions the Mopar buffs.
I have a 91 318 (5.2L) TBI (Throttle body injection) that I'm looking to put into my 1990 Jeep. I have no doubts that what you have is a Fuel injected engine as well. I received a few replies that explain some of the differences between the "std" and "Magnum" engines, so I recommend taking a look at my post. I picked up a 94 "Magnum" engine that threw a rod and plan on taking the heads and intake (MPI-Multi port injection) and placing them on the 91 "std" engine. I'll be comparing the block to head mating surfaces, bolt holes, water/oil passages, valve sizes, etc, etc. I hope to begin over the next week or so and plan on documenting my discoveries.
Feel free to get in touch with me directly although I plan on posting some of my findings on this forum. Talk to you soon.
-Gus-

11-24-2001, 06:34 PM	#1 (permalink)
Daren Rabago Registered User Join Date: Oct 2001 Member # 7596 Location: Everett, WA Posts: 28	What's different from Magnum vs non 360? Hello, there is a newbie around! I am a newbie to the board, and to Mopars, and have a question. I have a 1991 Dodge W-250 with a 360 gas throttle body injected motor. It is a complete slug. I was wondering if anybody knows what the difference between a Magnum 360 and the non-Magnum is, if a non -Magnum can be converted, if I'm just wasting my time, or if there are any other possibilities to gain some power. (Only minor engine mods are done right now, with K&N, 3 inch cat back, and 4.10 gears.) Any answers or help would be welcome! Thanks-DR

11-25-2001, 02:44 AM	#2 (permalink)
FULLSIZE Registered User Join Date: Mar 2001 Member # 3654 Location: Grass Valley, CA Posts: 4,462	are you sure it is a tbi? i thought 91 has mpi. i could be verywell wrong. anyone? if its tbi, i dont know how well the computer can handle mods. the mpi can handle very few before it gets out of whack. let me know if tbi or mpi. __________________ A Dodge guy...yep, weirdo for sure.

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11-26-2001, 08:08 PM	#3 (permalink)
Daren Rabago Registered User Join Date: Oct 2001 Member # 7596 Location: Everett, WA Posts: 28	Well, maybe I'm confusing my terms. It's a fuel injection system that basically looks like an electronic carb, and for all I can tell it looks like a small 2-barrel. I first thought it was a carb, and when I bought the truck was intending to swap to a 4-barrel, and possibly install a set of Mopar Perf heads from a fairly new 360 crate motor. Then I started looking, and realized it was efi! I felt like a moron then. From what I can tell, all the minor power upgrades for spacing the throttle body are for later injection systems. So maybe I have the the terms mixed up. (It does look like a Holley Throttle body though.) I guess I should also specify that the truck is a driver, and is used to tow a CJ-5 or a Suzuki Sam, although it has found it's way onto a trail or two. Thanks for the help so far. DR

11-28-2001, 08:15 AM	#4 (permalink)
Semi-Tuf-Jeep Registered User Join Date: Sep 2001 Member # 7257 Location: San Diego Posts: 5	Hey DR: I'm relatively new to Mopars as well, but I submitted the post that questions the Mopar buffs. I have a 91 318 (5.2L) TBI (Throttle body injection) that I'm looking to put into my 1990 Jeep. I have no doubts that what you have is a Fuel injected engine as well. I received a few replies that explain some of the differences between the "std" and "Magnum" engines, so I recommend taking a look at my post. I picked up a 94 "Magnum" engine that threw a rod and plan on taking the heads and intake (MPI-Multi port injection) and placing them on the 91 "std" engine. I'll be comparing the block to head mating surfaces, bolt holes, water/oil passages, valve sizes, etc, etc. I hope to begin over the next week or so and plan on documenting my discoveries. Feel free to get in touch with me directly although I plan on posting some of my findings on this forum. Talk to you soon. -Gus-