Thanks Mike. My Megajolt is behind the passenger seat in my Spyder, that's where I'd put the Speeduino. My Ford type coilpack is mounted above the trans/engine junction, so almost 3 feet from ECU.
Is your Hall/VR cable shielded AND twisted pair, shield grounded to ECU ONLY? Is your ECU in a metal case? I used leftover Subaru VR sensor wire for my install. The ground and shield really matters from what I've read. Mine worked out-of-the-box, no troubles or interference.
@DannyP, I really struggled to get a clean crankshaft sensor signal last fall. I used to be a research electronics tech and built probes and amplifiers to measure the signals inside a single kidney cell, so I was careful to shield and ground the VR/Hall wiring properly (to no avail). I finally discovered the problem when I wrapped a wad of aluminum foil around the Speeduino and grounded it. The problem was drastically reduced. Turns out that a small bit of fiberglass does not a Faraday cage make. The end caps of the Speeduino case are plastic and the interference was leaking into the box there. My coil was mounted on the firewall then, so I moved it to the other side of the shroud from Speedy and the problem was solved (switched to resistance ignition wires along the way). This may just be a noisy coil, but I'd make sure that there's some grounded metal between the coil and Speeduino. I never had this problem with the Megasquirt units, but the old 911 was a steel tank. I don't think a 50 caliber Desert Eagle would do much more than dent it.
Very good background, Mike. Got it, metal case on the ECU! Thanks for the explanation.
Making slow but steady progress on the installation. Found out that the left side air cleaner was going to collide with the rear relay/fuse box, so it had to move. 
Finished building the fuel and vacuum lines, too
Passenger side wiring with throttle position sensor harness, fuel injection harness and intake air temperature harness
The throttle bodies equipped with sensors, connectors and vacuum lines ready for installation
My able assistant and apprentice
Looking good Mike! Cute assistant!
Those throttle bodies look to be the exact same height as IDF/DRLA with the velocity stacks/extensions on top. Very nice!
More plugging away. I'm still having clearance problems with the CBP Panchito manifolds. I bought a bunch of 12mm exhaust style nuts and there still isn't clearance to put a socket on the short side of the manifold 'Y.'
I decided to make my genuine, made in the galldurn US of A manifold more like the cheap Chinese one I got off of fleabay. Me and my trusty grinder took a smidge off of the 1/4 inch thick manifold wall to allow a socket to just barely fit. Sorry if it sounds like I'm complaining, but to me, there's no excuse for this kind of lousy design/QA on a premium product.
Ok, got that off of my chest, again, and @Stan Galat, I don't want to hear "No, we all use the even SMALLER special nuts!"
So, now I could actually attach the manifolds and throttle bodies I could see another clearance problem. The type of injector plugs I bought a just a bit too long to clear the engine bay walls. It looks like about 1/4" needs to be shaved or clearance holes need to be cut. As you may remember, I went with the injectors in the throttle body because I was worried that putting them lower in the manifold might make it hard to change the spark plugs. Pay me now or pay me later. I'm still not sure what I'd recommend, but either one will work, both have drawbacks, but they aren't showstoppers.
Time to get some lunch and to decide what kind of fiberglass dust I'm going to make.
I don't see a big deal with those manifolds. I clearanced mine, too, although mine might have been the CB Perf. “El Cheapo” versions. And then I went for the super-slim nuts, too. IIRC, mine take an 11mm wrench. Three of them will accept a box end on the wrench Or a socket, but the fourth has to be either a Super-slim-wall 11mm socket or an open end stubby wrench (my personal favorite for turning the nut one flat at a time). It’s part of the price for the fame of having a “racing set-up” like the PCA guys have.
I channeled ALB and drilled some 1.5" holes so the injector connectors wouldn't run into the sides of the engine bay. The car's .73 ounces lighter now, so there's that. Perhaps more importantly, the injectors have plenty of clearance.
Just like on the driver's side where the rear relay box was in the way of the air cleaner, I discovered that a previous decision was incompatible with the ITB plan. I had a 50 amp circuit breaker that protected the alternator from a major short somewhere forward in the chassis. Turns out that the 'test' button was pressed with exquisite precision by the fuel rail hose on the passenger side.
Well, that won't work. How many of you have circuit breakers on your alternator anyway. I just relocated the output to the input terminal and bypassed it all. Maybe I'll relocate the breaker later.
So, after tweaking the ignition coil location slightly, I had room for the new ITF linkage. However, having never had ITFs before, I was in learning mode as I installed the cross bar, again, again and again. Three time's the indicator that it's time to take a shower, dress comfortably for the evening and pour a nice glass of whiskey. Life is good.
Thanks to all for your guidance.
Mike
@Michael Pickett wrote:
"Sorry if it sounds like I'm complaining, but to me, there's no excuse for this kind of lousy design/QA on a premium product. "
I agree, the casting could be made a little smaller in the area of the flange. I do recommend a thick washer under those small nuts to spread the load and prevent galling the manifolds.
Well you might get a nice rubber ring to trim up that hole 
... good for you Mike it is coming along.
Looking excellent. It is truly amazing how the arrangement and re-arrangement of components cascades with every small decision.
@DannyP posted:I agree, the casting could be made a little smaller in the area of the flange. I do recommend a thick washer under those small nuts to spread the load and prevent galling the manifolds.
@Michael Pickett posted:Ok, got that off of my chest, again, and @Stan Galat, I don't want to hear "No, we all use the even SMALLER special nuts!"
Actually... I didn't post before, because you said you didn't want to hear it, but everything can be solved with different nuts. Smaller socket, no need for a separate washer to drop into the nether regions of your engine when trying to remove the manifolds when you do this again.
From the EMPI catalog:
or:
They can be purchased almost anywhere that sells EMPI stuff (which is to say, every single VW shop).
Sorry...
PS: The manifolds are always going to be as big as they can possibly be, because they don't cast separate manifolds for every port configuration. The manifolds for the Panchitos are the same casting as those for Super-Pros or Ultra Wedge-Ports, which get a LOT of material cut away inside the runner when port-matched. Lots of hand-porting guys end up welding material onto manifolds, so they can cut the ports even bigger. Your casting is as big as it is to reduce the need for that. It's not a flaw or a QC problem, it's making one part that works for all applications, rather than 15 for each individual port. CB doesn't do everything right, but this is not one of the top 10 "wrong" things.
Grinding a bit on the outside of the manifold so we can use 13 mm (or 11mm, as the case is) headed nuts and a 3/8" drive socket instead of aftermarket 10 mm headed nuts and a 1/4" drive socket doesn't seem (to me) like an excessive amount of modification, especially for a guy building an entire EFI/crank-fire system from scratch.
I know it's frustrating, but there is a reason for it.
@Stan Galat posted:Grinding a bit on the outside of the manifold so we can use 13 mm (or 11mm, as the case is) headed nuts and a 3/8" drive socket instead of aftermarket 10 mm headed nuts and a 1/4" drive socket doesn't seem (to me) like an excessive amount of modification, especially for a guy building an entire EFI/crank-fire system from scratch.
I know it's frustrating, but there is a reason for it.
Yeah, I know, I just needed to vent. CB Performance is one of my vendors of choice. I just got grumpy because both the EMPI Kadron manifolds and the cheap Chinese manifolds had the clearancing done already. I was tired of having to redo things and special order nuts felt like a bridge too far. Still, if I were running a business and selling a product like this, I'd probably throw a few of the nuts that would fit them into the box just as a customer service. Wait, I I may not be over this issue yet.
Pineapple Mike wrote: "Perhaps more importantly, the injectors have plenty of clearance" from the new clearancing holes.
Not only that, but they now have semi-impinged air cooling of the injector hats for a better charge of cold(-ish) fuel, right? 
@Michael Pickett posted:Yeah, I know, I just needed to vent. CB Performance is one of my vendors of choice. I just got grumpy because both the EMPI Kadron manifolds and the cheap Chinese manifolds had the clearancing done already. I was tired of having to redo things and special order nuts felt like a bridge too far. Still, if I were running a business and selling a product like this, I'd probably throw a few of the nuts that would fit them into the box just as a customer service. Wait, I I may not be over this issue yet.
I get it. But look at it like this: you could always have Ed's problems, or Carey's since working on Anand's Spyder.
@Stan Galat posted:I get it. But look at it like this: you could always have Ed's problems, or Carey's since working on Anand's Spyder.
Gee, what did I do to take the polish off your apple. I wouldn't wish Ed's or Carey's problems on anyone 😄
@Michael Pickett posted:Gee, what did I do to take the polish off your apple. I wouldn't wish Ed's or Carey's problems on anyone 😄
I'm just a little ray of sunshine. It's what I do: spread that love, wherever I go...
@Gordon Nichols posted:Pineapple Mike wrote: "Perhaps more importantly, the injectors have plenty of clearance" from the new clearancing holes.
Not only that, but they now have semi-impinged air cooling of the injector hats for a better charge of cold(-ish) fuel, right?
That's right. It was all by design... Accidental design!
Hey. HAY!
And that whole "It's not a flaw or a QC problem, it's making one part that works for all applications" thing?
Those fat manifold walls are a feature, son!
Other, less thoughtful buyers would pay extra for fat castings!
