Off Roading Forums banner
1 - 5 of 5 Posts
G

·
Discussion Starter · #1 ·
Just wondering if anyone has experience with the Holley Digital Pro-jection system (P/N 501-12) or the Mopar Performance TBI conversion (P/N P5249385) conversions for the 4.2L. Obviously they should perform better than my Carter, so I'm looking for the problems installers have had. Any performance or installation problems? Thank you.

 
G

·
Discussion Starter · #2 ·
Currently working on the install for my 360. I am installing the pro-jection, and the fuel pump that is provided needs to be mounted BELOW the fuel tank, which is the main installation issue I am having. I do not want the pump to be that vulnerable. I am considering running the pump on the side of the tank, which would be an exhaust issue for most, but I run sidepipes, so I will not have to route around a tail pipe, or worry about the heat. I imagine the pump for the I6 is the same, so you will have similar issues. I am still tossing around ideas for the mounting now, so if anyone has suggestions let me know.

Jesse

Ignorance is the first step to knowledge.
 

·
Official Historian
Joined
·
8,339 Posts
a few weeks ago, i installed the pro jection on the 360 in my jeep. for the fuel pump, i drilled a 3/8" hole in the gas tank skid plate on the driver's side of the tank. i mounted the pump with the bottom of the pump even with the bottom of the skidplate. considering the lift and the bumpers i have, the pump is relatively protected. i just fixed a vacuum leak tody so we'll see how much better it does now. it has eliminated flooding on steep hills though and improved the throttle response. i'm planning on doing a write up with some pictures but it will have to wait a couple of weeks until finals are over.

79/CJ-7/AMC360/TH400/Q-TRAC/d30/d44/33's/RS9000s/Herculiner/Pro-jection 2D
 
G

·
Discussion Starter · #4 ·
Ed,

If I was you I'd get it. I have the Mopar MPI and LIKE it. Runs like a top, had to change up the air filtering system cause the K & N air filter let in to much dirt made it start running crappy. I fit a 3 lb coffee can with a round air filter from the auto parts store and with some additional rubber hose from the junkyard, and some machined parts from a friend, I have an air filtering system that doesn't suck hot air from under the hood during the summer, and keeps my throttle body clean. I found and bought the kit for 1595.00 balancer included, also installed a roller timing chain on it while it was apart. Get it you'll be happy with it. Later.

Booger /wwwthreads_images/icons/cool.gif

If a dog has no tail, how can you tell he's glad to see you?
 
G

·
Discussion Starter · #5 ·
I also liked the MPI kit, but if you want to do it right, get the 4.0L head at the same time. That is where I noticed good increase in power, but more importantly, a huge improvement in how it runs. The MPI kit has a problem with cold starts, that requires up to 5 minutes to idle up. Once I put the new head on (which was designed to work with the MPI kit), I couldn't be happier.

 
1 - 5 of 5 Posts
Top