Non Jeep Build 85 Spyder/Megasquirt

[msmoorenburg]

So like I need another project, but I can't say no to family :headshake:

Here is the goal. My Uncle has a 77 Alfa with mechanical fuel injection that has givin up the ghost. After looking over the system on a local car, I told him to convert it to Megasquirt. So after a trip to Texas and a ride in the Delorean he was sold on the idea. So down the rabbit hole I went, and came up with this idea to use the intake off a 82~91 Alfa and remove the mechanical injection. So a even longer story he has purchased a intake, and I purchased a 85 Alfa. So the goal is to do swap here then remove it and install it on his car 1800 miles away and retune. Then I get redo the 85 all over again :D(maybe keep it too). So here is the juicy part "the parts list"


1. Megasquirt 2 modded for points ignition (actually pertronix)
2. The 02 sensor is the Bosch AFS75 with matching plug
3. The Intake Temp sensor is a Airtex 5S1018 (std gm sensor)
4. The Coolant Temp sensor is a Wells SU109
5. Pertronix for the Meralle Distributor
6. XJ throttle body for the IAC and TPS

For the folks who want to know more about Megasquirt go here http://www.megasquirt.info/

So for the good part the donor car

http://i1135.photobucket.com/albums/m639/sellitx/photobucket-26724-1341801608424.jpg

http://i1135.photobucket.com/albums/m639/sellitx/photobucket-13820-1341801622819.jpg

http://i1135.photobucket.com/albums/m639/sellitx/photobucket-11795-1341801637808.jpg

The abused engine bay with the outdated fuel injection (this is already electronic)

http://i1135.photobucket.com/albums/m639/sellitx/photobucket-30264-1341801651389.jpg

http://i1135.photobucket.com/albums/m639/sellitx/photobucket-13183-1341801665729.jpg

The old tb close up
http://i1135.photobucket.com/albums/m639/sellitx/photobucket-28383-1342012717469.jpg

and the XJ tb I'll be using

http://i1135.photobucket.com/albums/m639/sellitx/photobucket-29347-1342012301688.jpg

[XJ Wheeler]

Clean looking for a donor. How hard was it finding an Alfa in Texas?

[4.3LXJ]

I have been looking at the Megasquirt and daydreaming too. Got my eye on that and an aluminum V6 for HUM WEE. So this project intrigues me because of that.

[msmoorenburg]

I have been looking at the Megasquirt and daydreaming too. Got my eye on that and an aluminum V6 for HUM WEE. So this project intrigues me because of that.

Well stay tuned the plan is to do a Ford 360 FE motor too

[msmoorenburg]

Clean looking for a donor. How hard was it finding an Alfa in Texas?

Not hard at all it was at a buddy's shop. its a great running car, It just needs a head due to it freezing and cracking the water jacket externally

[msmoorenburg]

So small update on the swap process. I've been collecting parts

The ecu
http://i1135.photobucket.com/albums/m639/sellitx/photobucket-6586-1343734975839.jpg

A close up of the pre-made engine harness
http://i1135.photobucket.com/albums/m639/sellitx/photobucket-8347-1343734993254.jpg

I'm thinking this will be the final home of the ecu
http://i1135.photobucket.com/albums/m639/sellitx/photobucket-8746-1343735032334.jpg

[4.3LXJ]

I am very interested in how this turns out. I have some daydreams for my own Mighty Mite and the smaller waterproof version on a more modern engine.

[msmoorenburg]

So I finally got the intake modded and reinstalled. I spent the bigger part of Saturday finishing up the wiring. By sunday night I got it to fire up and run for a bit


here are some shots


Basic auto generated fuel map after engine specs were entered

http://i1135.photobucket.com/albums/m639/sellitx/fuelmap_zps8cd5ea4c.jpg (http://s1135.photobucket.com/user/sellitx/media/fuelmap_zps8cd5ea4c.jpg.html)

Testing the jeep 4.0 tps

http://i1135.photobucket.com/albums/m639/sellitx/IMG_20130713_153115_008_zps4f47ad67.jpg (http://s1135.photobucket.com/user/sellitx/media/IMG_20130713_153115_008_zps4f47ad67.jpg.html)

here about 1/2 throttle, also you can see the engine and air temp working

http://i1135.photobucket.com/albums/m639/sellitx/IMG_20130713_153121_315_zps4036a16c.jpg (http://s1135.photobucket.com/user/sellitx/media/IMG_20130713_153121_315_zps4036a16c.jpg.html)

jeep throttle body installed and wired

http://i1135.photobucket.com/albums/m639/sellitx/IMG_20130713_153225_911_zpsd4266871.jpg (http://s1135.photobucket.com/user/sellitx/media/IMG_20130713_153225_911_zpsd4266871.jpg.html)

intake shot (i still need to fine a air filter)

http://i1135.photobucket.com/albums/m639/sellitx/IMG_20130713_153257_246_zps07434cd4.jpg (http://s1135.photobucket.com/user/sellitx/media/IMG_20130713_153257_246_zps07434cd4.jpg.html)

the basic wiring harness layout (i used jeep iam not a fiddle valve)

http://www.diyautotune.com/images/msharness/mswiring.png

[4.3LXJ]

Very nice Matt. I have been daydreaming about getting one someday for the Mighty Mite build I will do. Gotta make sure it will handle the engine first. Lots of stuff on the dream engine

[msmoorenburg]

Very nice Matt. I have been daydreaming about getting one someday for the Mighty Mite build I will do. Gotta make sure it will handle the engine first. Lots of stuff on the dream engine

just food for though if you can put a pertronix in it and a basic tbi your set. I think the older chevy cars with a 2.0 had a tbi that has the tps and iam with 2 injectors in one unit. I'll be using this on my Galaxie

http://www.holley.com/data/HolleyNews/Pictures/Large%20H-93.jpg

[4.3LXJ]

Yup, Paul has one on an engine going into the Mighty Mite ................ When he gives me a break from his TJ :rolleye0012:

[msmoorenburg]

Yup, Paul has one on an engine going into the Mighty Mite ................ When he gives me a break from his TJ :rolleye0012:

Also when ordering the megasquirt ask them to install the pull up resistor for "pertronix" if not you need a MSD 6a and $13 on a resistor or $200 on a msd box.

[4.3LXJ]

Good to know. That one is a while out for me. I am sure I will forget by then

[msmoorenburg]

So it lives with a noisy lifter and a idle that is at 1100 (i'm working on that) 1/2 of my issue is it will not get past 160 degrees (engine temp) and that is right at the end of the warmup tune (closed loop)


Alfa 2nd tune - YouTube

[msmoorenburg]

For anyone looking to do this here is my current wiring diagram and parts

O2 sensor AC Delco AFS75 AC Delco Amazon 32.32
O2 sensor plug AC Delco PT386 AC Delco Amazon 18.29
Modded Megasquirt MS2 complete with harness DYIAuto www.dyiauto.com 583.35
Fuel Injector Connector S697 Standard Motor Products Rockauto 19.68
Idle Air Control Valve Connector S551 Standard Motor Products Rockauto 16.21
Coolant Temperature Sensor 5S1018 (SU109) AIRTEX / WELLS Rockauto 7.39
Air Temperature Sensor 5S1007 (SU107) AIRTEX / WELLS Rockauto 17.37
Coolant Sensor Connector 1P1006 (254) AIRTEX / WELLS Rockauto *10.30
Air Temperature Sensor Connector 1P1016 (235) AIRTEX / WELLS Rockauto *13.19
Throttle Position Sensor TPS324 Duralast AutoZone 41.99



http://i1135.photobucket.com/albums/m639/sellitx/mswiring_zps8872c548.png (http://s1135.photobucket.com/user/sellitx/media/mswiring_zps8872c548.png.html)

the fuse box is 2 Dorman Products#326-85668

http://www.jegs.com/images/photos/300/326/326-85668.jpg

[Mudderoy]

So it lives with a noisy lifter and a idle that is at 1100 (i'm working on that) 1/2 of my issue is it will not get past 160 degrees (engine temp) and that is right at the end of the warmup tune (closed loop)


Alfa 2nd tune - YouTube (http://www.youtube.com/watch?v=ni-gA_vO_9s&feature=share&list=UU0lwFxBQsnHsQpWxC-KRXwA)

Does that indicate it's running too rich?

[msmoorenburg]

Does that indicate it's running too rich?

the O2 says its n the 14 range but it stays in closed loop till 160 degrees and it goes by IAC steps via temp to create a high idle

http://i1135.photobucket.com/albums/m639/sellitx/iacsteps_zpse02897b9.jpg (http://s1135.photobucket.com/user/sellitx/media/iacsteps_zpse02897b9.jpg.html)

[4.3LXJ]

Tstat?

[msmoorenburg]

Tstat?

it could be.... This car is a test bed and it has a cracked head (water during a major freeze). So the main purpose is to convert a car that is across the country that is a 77 alfa with mech injection. This car will probably be fixed or sold as is when done.