Hi Bill! Thanks for the reply; you're up in my home area, western WA!
Nope, I have not been to the Binderplanet forums but I will check it out and read some more. I have done a fair amount of reading on the megasquirt forums and I've browsed around various other forums when search results point me there.
With regards to the throttle body adapter, at the time I bought the manifold, throttle body, & adapter, the only adapter plate I could find that would bolt everything together is the one in the picture. (5+ years ago, maybe more?
) I have loose fit everything together and I don't remember seeing any glaring issues/differences with the bore size but it has been a while and I will look into what you described.
ETA : I checked the fit this evening and you are correct Bill, there is a pretty significant size difference in the bores. Hmm, excuse to upgrade to the 454 TB?
Bill usn-1 wrote:Couple notes, it doesn't seem you have read the FAQs on the Binderplanet...
It looks like you have the 5.7 TBI but you bought the Holley adapter with the 2"-7.4l bores.
I don't recommend mixing and matching bores. It can lead to vacuum leaks.
Make sure you preassemble and look for any potential problems before trying to run them.
Again, I haven't read through binderplanet yet, but I am looking at a Carter GP-5001 pump. 50 gph @ 20 psi. From what little I have read, people have had good success using it with stock TBI units. I've read a few cautionary tales about running the pressure too high to the stock regulator, yikes...
Bill usn-1 wrote:As for fuel pumps...the regulator is built into the throttle body so just make sure you get a pump designed for EFI.
Do not try to limit the pump pressure based on the system.
There are several recommended pumps listed in the FAQs on BP. They are capable of up to about 90psi but the regulator maintains it at the 12psi factory pressure.
I also use the same pumps on my MPFI systems with an external regulator at 42psi.
I don't have anything against the stock tank, I think it will work just fine for the foreseeable future. I am looking longer term to upgrade capacity by going to a rear mount tank. If I'm doing that, I might as well use a baffled tank. I think that I will stick to an external fuel pump regardless, it makes sense to me from a maintenance/repair perspective.
Bill usn-1 wrote:I've never ran an EFI specific tank on any of my installations. Never found a need for it.
The stock tank has worked fine and I have literally wheeled all over the world.
My only issue with going to a GM system to get it running and then going back to Megasquirt is I would be buying the parts I already need to get the MS system going and then getting the GM system parts on top of that. I didn't put up a picture of it, but I do have the megasquirt brain fully assembled & tested on the bench. If I were to spend the money to get an O2 sensor, a fuel pump, trigger wheel sensor, and the misc wiring & plumbing bits; I think I could get the jeep up, running, & tuned to pass emissions in a couple of weekends, using the stock spark setup (well almost, I did upgrade to the ford TFI coil, cap, & rotor bits). But I'm not in a big hurry, like I said, my goal is get it running by the winter. If I manage to find the parts for COP for a reasonable price before then, great!
This is a spare time & money project. My goal is to get it up and running, get all the other mechanical issues addressed (ball joints & tie rods, transmission leaks, diffs serviced, etc, etc) to get it to a reliability level to be a daily driver. Once I get it there, I will work on selling my current daily driver truck ('03 Tundra). I have no illusions that this will be a fast, easy, or cheap process.
Bill usn-1 wrote:If you want cheap and simple system just to get it running then I recommend just doing the GM TBI system.
Get it running with the factory Duraspark distr modified for timing control and learn how the system works.
Then start working on your Megasquirt toys with COP and whatever else you want to play with.
The bottom line is they are nice to play with but certainly needed to make the AMC a nice running engine with EFI.
Yeah, I briefly looked into MPFI but it appeared to be a lot of work for very little gain in performance. It is pretty cool looking though.
Bill usn-1 wrote:These old engines work very well on TBI. Even swapping to MPFI will net very little performance/MPG gains if both are properly tuned.
The only thing you really gain with MPFI is the bling factor when you pop the hood.
It still take XX amount of fuel to push a 6000lb brick thru the air at 70mph.
Thanks!
Bill usn-1 wrote:My .02