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225 Slant Six EFI MPI Intake Manifold.


This is a discussion on 225 Slant Six EFI MPI Intake Manifold. within the Engine & Performance forums, part of the 1st Gen : 1981 - 1993 category!
Greetings, This is my first post here, so please pardon me if I'm posting in the wrong area. I have ...


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Old 11-01-2016, 12:39 PM   #1 (permalink)
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Join Date: Nov 2016
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Ram Year: 1984
Engine: 225 Slant Six
Default 225 Slant Six EFI MPI Intake Manifold.
Greetings,

This is my first post here, so please pardon me if I'm posting in the wrong area. I have a 1984 Dodge D150 Stepside with a 225 Slant Six. We have developed a fuel injection manifold for the truck and have just installed it.
We only have a few hours on the tune. The setup is as follows:

6 24# Fuel Injectors.
A Jeep Throttle Body with IAC.
36-1 Trigger Wheel.
EDIS 6 Computer and Coil Pack.
A833 Overdrive.
Our custom intake manifold that we are hoping to sell after preliminary tests.

As of now we have been averaging 21-23 MPG with rolling Tennessee hills in 4th gear at 65-70 MPH.
The average MPG in 3rd gear at 40-45 MPH is 23-26 with rolling Tennessee hills.
On flat roads in the valleys we have seen peaks of 32 MPG and constants of 28 MPG again, this is 3rd gear between 40 and 45 MPH.

This engine is very worn out, it consumes 1 quart of oil for every 30+ miles (depends on RPM). The truck has 96,000 on it, but appears to have rolled over once.

I hope you guys enjoy seeing this build and I'll attach some pictures of our fabrication below. We have a revised version of this manifold in production (better injector angle and completely CNC machined instead of hand machined.).










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Old 11-01-2016, 09:34 PM   #2 (permalink)
 
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Location: under the truck
Posts: 13,502

Ram Year: 81 93
Engine: 5.2
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welcome. looks like a pretty cool project. you don't see a whole lot of people trying to fuel inject the slant 6's but then again they are known to do pretty good with a carb. i know hotrod had did an article a while back about fuel injecting a slant 6 vs carb on top of other mods and there was really no huge difference in power between the 2. it is pretty cool how they installed the fuel injection.
Chrysler Slant Six Cylinder Engine - Hot Rod Network
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mopp_0602_22z-chrysler_engine-intake.jpg  


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Old 11-01-2016, 10:32 PM   #3 (permalink)
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Ram Year: 2001 ram 3500
Engine: V10
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if you're using that much oil, I suspect it has rolled over twice. I've had many 225 slants. Usually run 4bbls, headers, 833 4spd, and 3.55 gears. Very lively package. Currently have a 66 Cuda 225/4spd with Police suspension and frt disks. I'd love to try FI. Keep us posted
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