|11-11-2011 09:39 AM|
|11-09-2011 08:56 PM|
Here is a nice article on the Mopar Performance 4.2 MPFI kit; Fuel Injection for Jeeps - Four Wheeler Magazine
But the complete thing is about 3000 bucks.
|11-07-2011 10:36 PM|
|daddyjeep||I dont believe you can just swap the manifold. You need the head and everything. Since you are going that far you might as well blend the two engines a little more and make a stroker...go big or go home.|
|11-06-2011 01:22 AM|
I'm gonna do it. Is that the same swap as the 4.0 intake manifold
|11-06-2011 01:16 AM|
I have from a Jeep show pictures of a 4.2 with the Chrysler FI swap. It's very pricy, but way cool. If I swap my postal, that's the way I'm going. these are actual picture fo a 4.2 with the Chysler conversion.
How cool is that?
|11-05-2011 11:04 PM|
|daddyjeep||I have read that you can do a junkyard conversion similar to the Howell system that I have. You will need the throttle body, computer, and the wiring harness from a GM 4.3. Do some searching on line to find all of the details. I bought the howell system a while back and love it. It is a great upgrade.|
|11-05-2011 09:19 AM|
|spazinweasel||The 4.2 and 4.0 heads are different you could get the fi conversion for the 4.2 but it is expensive|
|11-05-2011 07:47 AM|
|11-04-2011 11:09 AM|
|spazinweasel||you can do this a couple ways if you want to keep the 4.2 you need a 4.0 head plus all the fi stuff or you can transplant a complete 4.0 this is a direct swap if you have the ax15|
|11-04-2011 10:22 AM|
|ZackYJ||What about swapping the carb for a throttle body. The make a conversion for the 4.2 but it's pricey. Between $1100-$1400.|
|11-04-2011 07:42 AM|
|brightsidememe||I really hate the carburetor, i do a lot of rock climbing so it stalls. I even have a Weber carburetor that pretty new. I gotta do. More research, thanks.|
|11-03-2011 01:59 PM|
I have not done a swap on my jeep ('89 4.2L) and have never heard of a conversion that just uses the intake manifold from a 4.0L.
I have read about a swap of the head from a 4.0 to be used on a 4.2L still using a carb. The article claimed you'd gain 35~40 HP. If you convert to a 4.0 head, you'll also need a new exhaust manifold. Be careful and remember, one thing does lead to another!
When I read this article about a 4.2 > 4.0L head swap about a month ago, I was in the process of having my engine rebuilt at a reman shop. When I asked the reman shop about the swap, they doubted whether you'd gain that much HP and also commented on the fact that everytime they send out a Jeep engine that was modified in some fashion; (like swapping heads) there was always trouble. Injectors delivering so much fuel it washed out the cylinders etc.
Instead; I put on a 2100 Motorcraft carb, nutter bypass, the TFI ignition upgrade and I'm very happy w/ the results. A lot less costly and trouble-free. Looking back I'm glad I did what I did as compared to a head swap.
Good luck in whatever you decide to do!
|11-03-2011 06:31 AM|
converting 4.2 to fuel injection
So I was talking to a friend who is pretty knowledgeable on jeeps about an easy way to make the 4.2 to a fuel injection.
Basically he said you swap the intake manifold, wiring harness, ecm, and injectors from a 4.0 engine. Says the intact manifold set up is the same.
Has anybody tried this? I'm gonna do it eventually when I have the extra money but would like some feedback