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-   -   Electromotive XDI install questions (http://forums.pelicanparts.com/911-930-turbo-super-charging-forum/1006789-electromotive-xdi-install-questions.html)

Rich76_911s 09-03-2018 06:20 PM

Electromotive XDI install questions
 
I picked up an XDI twin plug ignition setup for the 930 here on the classifieds, and I have two elementary questions on installing this.

1. How do people install the coil packs on the firewall? Is it as simple as drilling a hole, installing a rivnut, and bolting them onto the firewall? Or is there more to it than that? Seems like that is the only option unless I weld some brackets on there.

2. Where do you guys install the MAP sensor? Can I use one of the vacuum lines that currently run to the distributor?

Thanks in advance.

Rich

flightlead404 09-03-2018 07:08 PM

ugh I hate rivnuts!

50% of the time you end up with a spinner (and not in a good way).

How about a nutplate instead?

Rich76_911s 09-03-2018 08:03 PM

Flight,

Thanks for the lead. I never heard of a nut plate before. Looks like a decent idea.

Something like this is what your suggesting, right?

https://www.pegasusautoracing.com/productselection.asp?Product=MS21047

philip j 09-04-2018 04:34 AM

http://forums.pelicanparts.com/uploa...1536060676.JPG

I bent some aluminum plate and screwed it to the fire wall with self tapping sheet metal screws, then screwed the coil packs to them.... hard to see the off set in the aluminum because of the foam engine bay insulation. Map sensor you can also see to the left of the coils is connected to back of the throttle body... Philip

16Volt 09-04-2018 07:57 AM

I chose number 1 with rivnuts, no issues.

https://farm1.staticflickr.com/790/3...6e6a1a36_c.jpgIMG_4672.jpg by Shannon, on Flickr

Rich76_911s 09-04-2018 07:15 PM

Thanks for the examples. I greatly appreciate the photos. Seems like there are a 100 ways to skin this cat.

Uwon 09-05-2018 07:41 AM

Rich,
No chance to put the coils on top of the 930 intake manifold? Would save you allot of grief when you have to drop the motor. Maybe some aluminum brackets up from the intake studs?
Johan

slyguy 09-05-2018 06:35 PM

My hpx are on the back firewall, made a bracket for the map sensor and contact points just to make it easier to time. If i had to do again I'd be using a flat plate above the intake in the AC vicinity as Johan mentioned, changing the location is on my things to do list

flightlead404 09-05-2018 08:01 PM

Quote:

Originally Posted by Rich76_911s (Post 10166705)
Flight,

Thanks for the lead. I never heard of a nut plate before. Looks like a decent idea.

Something like this is what your suggesting, right?

https://www.pegasusautoracing.com/productselection.asp?Product=MS21047


Exactly. Either with pull rivets or driven rivets.

Drbraunsr 09-05-2018 08:29 PM

Electromotive manual reads:

MAP sensors simply plug into the intake manifold of the engine (after the throttle)

1Bad86 09-06-2018 12:24 PM

I mounted my coil packs on the rear package tray and ran the wires through the firewall. I mounted the map sensor in the rear fuse panel.

Rich76_911s 09-06-2018 12:28 PM

I'll look into mounting near the AC compressor. I removed that 15lb lump anyway as it was not functioning at all when I bought the car. I'd like to say I'd fix the AC sometime soon, but there are about a dozen other things I want to get to first.

I'll post a photo or two of my MAP sensor vaccuum/pressure line when I get it done, just to check with everyone that I did it right. Don't want to mess that up.

Thanks again
Rich

Uwon 09-08-2018 05:35 AM

Quote:

Originally Posted by Drbraunsr (Post 10169746)
Electromotive manual reads:

MAP sensors simply plug into the intake manifold of the engine (after the throttle)

Good point. Best place is to tap into the intake away from the throttle body and not near any one cylinder intake, say the middle of the right manifold on a 3.2. And use a short tube connection to the sensor.
A good plan is to separate the wires from the cpu to the sensors as much as possible to reduce possible cross interference all while staying at least 4 inches away from the ignition wires.
Johan

16Volt 09-08-2018 11:59 AM

Why do you say 'away from the throttle body'? I have mine running from one of the throttle body ports.

Uwon 09-08-2018 02:28 PM

Quote:

Originally Posted by 16Volt (Post 10173433)
Why do you say 'away from the throttle body'? I have mine running from one of the throttle body ports.

Basicaly advise from both Ben at Electromotive and Richard Clewett when I was searching for a solution to my weak idle. You get a better and steadier reading away from the air turbulence so close to the butterfly. I would also surmise that this is also a reason why the standard IAC pickup is also placed well below the throttle body on the 3.2 manifold at least. That is not to say that your setup wonít work-itís just that tuning a turbo with an Electromotive system can be challenging enough so itís wise to reduce at the outset the number of variables that may give you lousy tuning readings.
Johan

16Volt 09-08-2018 04:41 PM

Quote:

Originally Posted by Uwon (Post 10173669)
Basicaly advise from both Ben at Electromotive and Richard Clewett when I was searching for a solution to my weak idle. You get a better and steadier reading away from the air turbulence so close to the butterfly. I would also surmise that this is also a reason why the standard IAC pickup is also placed well below the throttle body on the 3.2 manifold at least. That is not to say that your setup wonít work-itís just that tuning a turbo with an Electromotive system can be challenging enough so itís wise to reduce at the outset the number of variables that may give you lousy tuning readings.
Johan

Great info, thank you.

I'm having trouble getting my vacuum routing sorted out so this helpful with my xdi-2.

Sent from my SM-G955U using Tapatalk

flightlead404 09-09-2018 10:51 AM

Quote:

Originally Posted by Uwon (Post 10173669)
Basicaly advise from both Ben at Electromotive and Richard Clewett when I was searching for a solution to my weak idle. You get a better and steadier reading away from the air turbulence so close to the butterfly. I would also surmise that this is also a reason why the standard IAC pickup is also placed well below the throttle body on the 3.2 manifold at least. That is not to say that your setup wonít work-itís just that tuning a turbo with an Electromotive system can be challenging enough so itís wise to reduce at the outset the number of variables that may give you lousy tuning readings.
Johan

What about T-ing off the brake booster port on the manifold?

short/long hose is not really an issue, pressure changes occur at the speed of sound

Uwon 09-10-2018 07:53 AM

Quote:

Originally Posted by flightlead404 (Post 10174556)
What about T-ing off the brake booster port on the manifold?
short/long hose is not really an issue, pressure changes occur at the speed of sound

Taping to the brake booster would be a bad, bad idea in my view. Just think, you brake hard, air pressure drops rapidly, rpm drops past idle, and engine may not recover fast to avoid stalling.

Canít comment on the speed of changes in air pressure but surely itís allot slower than electronic pulses. Otwithstanding, it does make sense to have shorter hoses wherever you can. It avoids unnecessary clutter and possible kinks. Itís so easy to make up a bracket to hold the MAP sensor close by.
M2Cís
Johan


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