Vacuum Advance for EA81T

[coronan]

From Advanced Diaphragm Options
Thanks for the photo.
It is clearly not the same as any model that we have here in Aus.
We can definitely reco that unit. You will need to send it to us.
Cost would be $85au plus freight each way.

[steptoe]

Good, What I saw in it was that the EA82T vac can and module will work in EA81T

on the megajoltE I see they have up to 3 bar MAP sensor, so that should cover boost such as turbo. You may just be a pioneer doing an EDIS on EA81T

I am wondering out loud if/how the MegajoltE EDIS can use a knock sensor input. My EA82T has a knock sensor, 1 wire for later, two wire for earlier EA82T
I get impression is if you try to hook up a dizzy for its optical pick up you may be on your own for working out how to wire it in. If you go complete EDIS set up that everyone in their community go, you are on same level - a 36-1 tooth ring on the crank pulley, a universal pick up you need to make a bracket for, universal generic coils etc

Advance has not put prices up in ten years !

[steptoe]

well, if we can trust that naru found EA81T worked well with the EA82T vac can ...spoke to Mike of advance which is a father and son concern, I could send my good newish one to him to measure up for specs, so you would get an EA82T spec unit as in spring tensions etc. Says he could likely build you one based on it, instead of you posting yours to him.

Hows that sound?

[Silverbullet]

There are 2 things i haven't found when reading EDIS conversions.
1 no one is using the Turbo Dizzy for a pickup.
2 No one is using the factory MPFI
3 little to no boosted applications. And definitely not with out full aftermarket ECU.

I'd like a simple EDIS swap and retain the stock ECU.

I've converted my EA81 to EDIS as has another member on here (SubyDoug) and although mine isn't turbo I can probably answer a few of these points. Keep in mind there are 2 aftermarket EDIS conversion systems that I know of - Megajolt and Megasquirt. I use the jolt, it only controls ignition. The squirt does ignition in much the same way, but can also control fuel injection.

1 - I wouldn't say nobody is using an original dizzy as a pickup, just very few. Main reason I see to not use it would be you still have moving, wearing parts that can introduce "play" and innacuracy into an otherwise precision ignition system. Also the signals the stock dizzy puts out might not be what the EDIS ECU is looking for as a trigger (I couldn't say yes or no, I don't know what the stock dizzy puts out)

2 - You could use the factory MPFI with either EDIS system. For the megajolt system you could leave the MPFI untouched, but the megajolt ECU is still required and is a separate, standalone unit. If you went megasquirt, it would seem a waste to me to not control the MPFI with it as well. Still it is a separate ECU unit (not sure if you could omit the stock ECU in this case? I'm guessing not, and it definitely wouldn't be a simple weekend swap job)

3 - I'm pretty sure there are people who have had great success putting EDIS on a boosted engine. You might need something other than the built in MAP sensor on the megajolt, or have a throttle position sensor instead (you can run it with one or the other) The main benefit of EDIS was to those with older (i.e non boosted) engines who want to ditch their crappy old dizzy.

Which ever option you go, EDIS being a "simple swap" is a matter of perspective Definitely not as simple as just getting a vacuum can rebuilt/replaced for your old dizzy, but definitely a much better system overall. As for cost, I couldn't say for you in another country (where cars with stock EDIS e.g 90's fords were more common, handy to nick parts from) but for me it's probably up there around the $500 AUD mark and that was having to buy every individual part in from overseas. The megajolt ECU is even made in the states! Another thing worth mentioning; if you do the EDIS swap it isn't as easy as bolting the parts in and go. The installation is 75% of the work, tuning it and creating a good ignition map for your particular engine makes up the rest.

Oops, sorry if I completely derailed this thread about EA81T vacuum cans and making a wall of text Hopefully it can help you decide which way to go though.

[El_Freddo]

That's a good explication SB

Big move for a "measly" vacuum canister.

Cheers

Bennie