Definitely feeling better about going the Megasquirt way. I got a spreadsheet of MSRP of Holley sniper vs MSRP with Megasquirt 3. Tried to get most of the big ticket items from oil pan to injectors. Ok, I left out push rods, spark plugs and wires, but all that is still up in the air. At the end of the day it looks like a wash. The Megasquirt will take more time, but on the flip side I should learn about how it all works. It is higher than expected. The range in price of things like rocker arms, there's got to be a $200+ difference from low end to upper range. I'll put the time needed to research all that at a later. I'm just trying to get a game plan together right now as to not spin my wheels and toss money away.Seems like you have a preferred direction to go.
My suggestion is list everything in parts both new and used possibilities, machine work, and modification to said vehicle. Then list costs associated with each and include contracted costs you need to farm out. Being honest my bet this still comes out higher than expected. I’m sure guys on here will help with anything missed or over looked. Generally the small stuff adds up quick such as special fittings, clamps, reducers, that type stuff that gets overlooked.
Keep in mind it is easy for others to spend your cash. Maybe they can help ya save some as well.
Didn’t GM have a multi port with fix position distributor in the late ’90’s?
I been keeping an eye on the Holley support forums. They aren't immune to O2, stuck injectors, or RFI issues either.Chucky, i'm late to the discussion, but I have to wonder about spending the money to build 496 cu in and then skimping on the injection setup. The first and foremost consideration I would want is that when completed .........I want it to be reliable. Being out on the road with a camper trailer and having some small cheap component fail in a home assembled injection system will ruin your day and your finances.
I would get a 4L80 trans and a throttle body injection and install them in your current 396 powered vehicle. Sort everything out and enjoy the learning curve. With the lower gears in the 4L80, your 396 will pull differently. Once you have everything working well and are happy with your set up, then make building a larger engine to install later a secondary project. That way you are not trying to change everything all at one time. You have solved some basic problems with the initial trans/injection swap and changing the engine out should present fewer issues to contend with later on.
After using the Holley Term and HP ECU's and MS1, MS2, MS3X and micro I will say that the Holley is by far the easiest setup out there to the initial startup and tune functioning. The Megasquirt stuff is not overly demanding at all and the support forums for it are very good - I've never had an issue with support for any of my MS projects. I wouldn't hesitate to recommend either to anyone.I am running something close to your idea (BBC/4L80E), and since Microsquirt has been discussed I'll put my .02 in for my experience with Holley EFI-I have the Dominator in my Car, controlling a 4L80e, running sequential, 8-IGN-1 Coils with the Holey crank trigger and an MSD Cam Synch. I have been very impressed with the ease of tuning (for an old guy who is semi-computer literate)-with the exception of a failed Bosch 02 sensor (I changed up to the NTK-it's the only way to go) I haven't had a hiccup with the system, and this is my second summer running it-
I am running one of the standard tunes for the 4L80e, and haven't tweaked it at all-it shifts perfectly, and I am running a paddle shifter setup that took me about 5 minutes to program in the inputs/outputs-it was very intuitive.
The initial tune was a snap to install, and, like the Microsquirt it is self learning, so my Car ran great right out of the Garage and only got better-there was a few questions I had during initial install and tuning, and the Holey EFI Facebook crew were so gracious in their assistance-I expected trouble but never had it-