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Topic: Can a 3g be damaging overkill? (Read 18312 times) previous topic - next topic

Can a 3g be damaging overkill?

Reply #120 –
Us design engineers use that term all the time...
11.96 @ 118 MPH old 306 KB; 428W coming soon.

Can a 3g be damaging overkill?

Reply #121 –
Props added for thunderchicken on the sticky,,,, I cant believe i forgot to.  Also, your latest drawing is on the sticky as well. This is the first time ive seen that version and it looks nice.

Can a 3g be damaging overkill?

Reply #122 –
Yes, I agree its simple too..  But after 'the fire' and the missing details (not to mention the frighteningly confusing wording/process on the NATO write-up) I felt over buttstuffyzing this process, especially on the 88 tc which is different than most,was important; ESPECIALLY for those who dont know a lot about cars...  They can see weve done our homework and built in safties along the way and the final layout is tested...  Idk, all goes back to fire paranoia for me!
1988 Thunderbird Turbo Coupe
'89 5.0 w/ ported intakes, Mallory Adjustable FPR, BBK shorties and H with 2.5" Flows, 130 amp 3G, 89 Mustang comp/wiring, Aluminum radiator w/ elec fan, T5 trans, King Cobra clutch, 3.55 gears, 13" Cobra brakes (front), Wilwood prop valve, Mustang A-arms, Front Coil-overs, MM CC plates, Silver 17x9 R's, 03 Cobra IRS, Aluminum DS, 2002 Mustang dash/console etc..., custom leather seats

Can a 3g be damaging overkill?

Reply #123 –
I'll agree.  I just read this whole thread and was beginning to worry about doing a 3g upgrade on my 84.  After reading TC's post it's not that difficult to understand...

And in regards to the K.I.S.S.:

Us alcoholics know it too!:drink:
84 TC 302 -5.0L/t5/7.5 locking rear and a 3.45 gear, Edelbrock Intake, Aluminum Heads, Edlebrock 65mm Throttlebody, Edlebrock Cam, 24lb injectors & MAS Air Sensor calibrated via chip,  BBK headers, Catback H pipe, Magnaflow lers :evilgrin:
:pics-stfu:

 Project Thread with pics

Can a 3g be damaging overkill?

Reply #124 –
Ok, so this is still bugging me: about 30% of the time I shut my car off (since the 3g upgrade) it continues to run for about .5 - 1 second.  The fuel pump also seems to continue to run that duration.  I just can't figure out what would cause this.  The only other change I made was moving 3 ring terminals (green fuse link - as seen in diagram, another fuse link, and a third fuse link I added to power just the EEC) to a distribution block about 8 inches from the solenoid (via an 8 gauge power cable).  Anyone have any ideas what might cause this or where I can start to troubleshoot?
1988 Thunderbird Turbo Coupe
'89 5.0 w/ ported intakes, Mallory Adjustable FPR, BBK shorties and H with 2.5" Flows, 130 amp 3G, 89 Mustang comp/wiring, Aluminum radiator w/ elec fan, T5 trans, King Cobra clutch, 3.55 gears, 13" Cobra brakes (front), Wilwood prop valve, Mustang A-arms, Front Coil-overs, MM CC plates, Silver 17x9 R's, 03 Cobra IRS, Aluminum DS, 2002 Mustang dash/console etc..., custom leather seats

Can a 3g be damaging overkill?

Reply #125 –
Since the circuits required to make the car run require and receive power only when the ignition is turned on the 3G swap couldn't possibly cause it (unless you really, REALLY screwed up the wiring :hick:). I would start looking at the IRCM and ignition switch
2015 Mustang GT Premium - 5.0, 6-speed, Guard Green - too much awesome for one car

1988 5.0 Thunderbird :birdsmily: SOLD SEPT 11 2010: TC front clip/hood ♣ Body & paint completed Oct 2007 ♣ 3.55 TC rear end and front brakes ♣ TC interior ♣ CHE rear control arms (adjustable lowers) ♣ 2001 Bullitt springs ♣ Energy suspension poly busings ♣ Kenne Brown subframe connectors ♣ CWE engine mounts ♣ Thundercat sequential turn signals ♣ Explorer overhead console (temp/compass display) ♣ 2.25" off-road dual exhaust ♣ T-5 transmission swap completed Jan 2009 ♣

Can a 3g be damaging overkill?

Reply #126 –
Yeah, I know the 3g wiring is pretty simple but it literally showed up after 4-5 years with this setup...  So I thought it could maybe be from the distribution block I used to free up space on my starter solenoid...  Idk why that'd make a difference, still basically connected in the same place...  It's just weird it'd show up on my first test drive after the 3g install.

IRCM is what?  That secondary computer on a TC?  In that case, I no longer have it.  As far as the ignition switch, is there a way to test it  or would I have to just swap it?
1988 Thunderbird Turbo Coupe
'89 5.0 w/ ported intakes, Mallory Adjustable FPR, BBK shorties and H with 2.5" Flows, 130 amp 3G, 89 Mustang comp/wiring, Aluminum radiator w/ elec fan, T5 trans, King Cobra clutch, 3.55 gears, 13" Cobra brakes (front), Wilwood prop valve, Mustang A-arms, Front Coil-overs, MM CC plates, Silver 17x9 R's, 03 Cobra IRS, Aluminum DS, 2002 Mustang dash/console etc..., custom leather seats

Can a 3g be damaging overkill?

Reply #127 –
Ok, I think I got it.  When I was 'simplifying' my solenoid stud (by adding a distribution block) I removed the ring terminal that powered my fan relay as well as the 'key on' signal wire which was connected to the green/red for the alternator.  So, to test drive with the new alt, I needed a 'key on' signal and a power source.  So, since I knew the green/red wire recieved 12v with the key on, I temporarily used this for both.  SO, when I go on a long trip, my cooling fan kicks on and when I kill the ignition, the fan blades keep spinning for a moment which I'm guessing generates current in the reverse direction and sends it into the system even though the key is off...  and on short trips, no fan, no reverse current.

Anyway, I'm pretty sure this is it...  I'm gonna try to fix this up asap.
1988 Thunderbird Turbo Coupe
'89 5.0 w/ ported intakes, Mallory Adjustable FPR, BBK shorties and H with 2.5" Flows, 130 amp 3G, 89 Mustang comp/wiring, Aluminum radiator w/ elec fan, T5 trans, King Cobra clutch, 3.55 gears, 13" Cobra brakes (front), Wilwood prop valve, Mustang A-arms, Front Coil-overs, MM CC plates, Silver 17x9 R's, 03 Cobra IRS, Aluminum DS, 2002 Mustang dash/console etc..., custom leather seats

Can a 3g be damaging overkill?

Reply #128 –
You are right in that a coasting DC motor becomes a generator.

Can a 3g be damaging overkill?

Reply #129 –
Here is something you may want to think about.
The stator output on the alternator, which is 1/2 the alternator output voltage, use to be used to power the choke heater in the carburetor days.
This way the choke didn't begin to heat until after the car was running.

How about using the stator output to pick a 6v relay to power your cooling fan?
The fan wouldn't start until the engine is running.

This way you wouldn't have the electrical load of the cooling fan on the battery at the same time you are trying to start the car.

Can a 3g be damaging overkill?

Reply #130 –
That's a good idea but I actually don't have the load on the battery while starting (usually).  The way I'm doing it is [different] keyed signal that is off during cranking.  Then my added temp sensor grounds the relay and closes the circuit at the right temp...
1988 Thunderbird Turbo Coupe
'89 5.0 w/ ported intakes, Mallory Adjustable FPR, BBK shorties and H with 2.5" Flows, 130 amp 3G, 89 Mustang comp/wiring, Aluminum radiator w/ elec fan, T5 trans, King Cobra clutch, 3.55 gears, 13" Cobra brakes (front), Wilwood prop valve, Mustang A-arms, Front Coil-overs, MM CC plates, Silver 17x9 R's, 03 Cobra IRS, Aluminum DS, 2002 Mustang dash/console etc..., custom leather seats

Can a 3g be damaging overkill?

Reply #131 –
booksix
for someone as humble as you sound,, you sure do have some smarts about you:hick: not many people would conclude to the dc motor generating power like you described.  good eye though.

My earlier opinion was that somethng was keeping the eec relay on longer than normal prior to the 3g,,,,,,,,,,Softtouch, your thoughts?
 

Can a 3g be damaging overkill?

Reply #132 –
LOL, thanks...  I appreciate your comment...  It was quite interesting.  I was on my way to work and it just clicked!  It was pretty cool!

Anyway, you were right in a way (as far as something being powered after the key is killed) only it was the ignition rather than th EEC relay (assuming I'm correct that is).
1988 Thunderbird Turbo Coupe
'89 5.0 w/ ported intakes, Mallory Adjustable FPR, BBK shorties and H with 2.5" Flows, 130 amp 3G, 89 Mustang comp/wiring, Aluminum radiator w/ elec fan, T5 trans, King Cobra clutch, 3.55 gears, 13" Cobra brakes (front), Wilwood prop valve, Mustang A-arms, Front Coil-overs, MM CC plates, Silver 17x9 R's, 03 Cobra IRS, Aluminum DS, 2002 Mustang dash/console etc..., custom leather seats

Can a 3g be damaging overkill?

Reply #133 –
Quote from: booksix;180736

Anyway, you were right in a way (as far as something being powered after the key is killed)  (assuming I'm correct that is).


well no shiznit sherlock,,,,:shakeass: :D

Can a 3g be damaging overkill?

Reply #134 –
lol, yeah yeah, I can state the obvious quite well!
1988 Thunderbird Turbo Coupe
'89 5.0 w/ ported intakes, Mallory Adjustable FPR, BBK shorties and H with 2.5" Flows, 130 amp 3G, 89 Mustang comp/wiring, Aluminum radiator w/ elec fan, T5 trans, King Cobra clutch, 3.55 gears, 13" Cobra brakes (front), Wilwood prop valve, Mustang A-arms, Front Coil-overs, MM CC plates, Silver 17x9 R's, 03 Cobra IRS, Aluminum DS, 2002 Mustang dash/console etc..., custom leather seats