After months of searching I found a local 1991 NA engine that was just pulled for $300 with everything (all sensors, ecu, engine harness, MAF, and all). I loaded it up and brought it home, and am trying to figure things out to put it in my dune buggy. In the past I have run a carburetor setup and distributor, but am planning on using the fuel injection. Now come the questions: what all can I remove from this thing and still have it run properly with the fuel injection? I took some pictures of some things I don't know what some are, or if I need them? One of the vacuum things is broken off and I don't know if I need to fix it, or if I can get rid of it all? I have never had to deal with any of this with the last 3 motors because they all came as short blocks without any of this stuff, so any help is much appreciated.

 

Here are the pictures, I know the first is some kind of vacuum thing, I think the hoses are hooked up right in the 2nd picture but just checking, unsure what the big thing is in the 3rd picture, or if I need the hoses in the 4th, or if I'm missing a hose in the fifth picture? Again, any help is greatly appreciated.

 

3rd pic is the cruise control. toss it.

 

your dipstick is missing.

 

I'm aware that the dipstick isn't there, but I still have mine from the last blown motor so that's ok. Thanks for looking out though. Good to know I can just take that off, for the cruise control, I appreciate that. I've been searching and found the link to rotary resurrection for removing the rats nest and I might try that since one of the things broke off while loading the engine.

 

I figured out the 4th picture is the ACV, and have removed it and am ordering a block off plate. I also read up on things I don't need and am wondering if I can just leave the extra stuff there for now, until I actually get it running, then trim down my engine harness and remove the rats nest later? Or will that mess something up?

 

Ugh, an S5 NA is probably the worst option for trying to rip stuff off with it still working properly.

You may need to look into having the aux ports actuated by a separate pump/rpm switch deal. Forum member Landon303 has some good information about it. As far as the VDI goes, I'm not really sure how it actuates stock, but as I recall it has the same vacuum or pressure operated diaphragm that operates at like 5800 rpm. So another rpm switch from Summit racing would actuate a vacuum solenoid, which would apply the pressure (or vacuum to it) to operate.


If it were mine, I'd rip off the electronic oil metering pump and either premix or use a mechanical one, then get an inexpensive standalone because I don't trust the 20 year old non-weather proof wiring harness in a car, let alone in a buggy.

 

Thanks for the advice. I have wired the ports opened, so that's not a problem (I'm almost never below 3-4K RPM's and mostly in the 4500-7500 range so they wouldn't do me much good anyways). Can I remove the mechanical OMP and still use the stock ecu for now (I don't think that's an option unless I go RTEK)?

 

I don't think you can just "rip off" the S5 OMP without going into limp mode.

 

I've been premixing with my past motors, but they've all been carbureted and run with a distributor. This is my first venture into fuel injection, and the first time I've even seen a 13B with all the stuff on it (mine have come as short blocks that I bolted my stuff on). I think I'll try it with the OMP and everything that I need to get the stock ecu to work, then if I come across a deal on a standalone, or if this doesn't work out, then I'll switch at that time. I am just trying to get this where I can hear it run and check the compression, before I put much more money into it.

 

Stupid question but, what's a VDI? I've searched the forum, but everyone just abreviated it and I haven't found any pictures or anything to help me figure it out.

 

With a standalone, anything is possible

 

variable dynamic intake

It means it changes the direction and length of the intake runners based on engine rpm. Of all the cars I've ever worked on, this is the oldest one using that "technology". I worked for Dodge for a while, and they didn't really catch on until the later 90's!

 

Is there something else I need to do with the VDI, or would that not be applicable with the 5th/ 6th ports wired open all the time? Again, sorry if some of these seem liek dumb questions, but none of the guys I go with that run a 13b use fuel injection or anything and don't know anything about this either, I'm kind of acting as the guinea pig on this to see how well it performs verses the carb setup.