Progress Thread 74 Mustang II - Build as semi-daily driver

LILCBRA · Jul 9, 2021

Here's to hoping you can get the car on the dyno to see how it compares to your estimates and a congratulatory cheers on passing inspections and being able to drive it!

2Blue2 · Jul 9, 2021

Im excited it got legal papers!

Drive, DRIVE, DRIVE!!!

Enzio · Jul 9, 2021

YaHoo! Rock and Roll!

extra_stout · Jul 9, 2021

And the car broke down
I think the Bosch coil that was in the car when I bought it, isn't happy. But I have an spar coil here.
While I was standing in a parking lot waiting for the tow truck the radiator decided to start leaking...
Radiator and coil are the two things that I didn't renew.
Overall not so bad, because the engine signalized early enough that it was unhappy and I could pull into the parking lot. Insurance pays the tow truck... Now I know what is broken.
I'm unsure if I should get a new radiator or let a local shop rebuild it. Someone bought a new radiator that fits? What is the quality?

extra_stout · Jul 10, 2021

Just saw that the Mustang II radiators 75+ have a complete different mounting bracket.
Seems that more likely this would fit: https://www.ebay.com/itm/2338846169...d=link&campid=5335821607&toolid=20001&mkevt=1
This would be a cheap solution, but unsure what the quality is.
I think for the same money (with shipping and everything) a radiator shop could rebuild my brass radiator in good quality...

extra_stout · Jul 10, 2021

Stupid question: does our ignition wiring have a resistor? 12V for starting and than it will drop to lower voltage? Similar to 1gen Mustang?

extra_stout · Jul 10, 2021

extra_stout said:
Stupid question: does our ignition wiring have a resistor? 12V for starting and than it will drop to lower voltage? Similar to 1gen Mustang?

Now I can answer my own question: yes there is a resistor and the voltage drops after starting to around 8.X V

2Blue2 · Jul 10, 2021

No answer for 74 radiator or the Maverick Radiator fit.
Does 74 have the hose mounted radiator fill?

If ya get yours rebuilt, a least you'll know it will fit.

Enzio · Jul 10, 2021

extra_stout said:
Now I can answer my own question: yes there is a resistor and the voltage drops after starting to around 8.X V

I learned something I guess. That doesn't sound right to me. But I've never messed with a 74. Where are you measuring?

Enzio · Jul 10, 2021

extra_stout said:
I think for the same money (with shipping and everything) a radiator shop could rebuild my brass radiator in good quality...

If I was in your position that's what I'd do.

extra_stout · Jul 10, 2021

Enzio said:
I learned something I guess. That doesn't sound right to me. But I've never messed with a 74. Where are you measuring?

I measure between ground (body) and + terminal of the ignition coil.
I just checked the wiring diagram for 74 I have and if you follow the + terminal of the ignition coil you see a resistor. That is the same wiring as at the first generation mustangs and has something to do with the coil resistance. Stock coils have around 1,5 Ohm (V8) and only can be used with this resistor that is in the stock wiring. If the original coil gets 12V all the time it will die. BUT for better starting the coil gets 12V as long as you are on "start". I use a pertronix 1 which can work with 8.xV, but it is designed for 12V. It works until a small voltage drop is enough to shut the pertonix "off". I already have 12V that is switched with an relay for the holley e-choke, so I will connect that also to the red wire from the pertronix and never should have problems again.
I had to call a friend who told me that
I had 10 years ago the same problem with my 66 coupe
I'm not good with wires... I think i said that once.
On Monday I will call a radiator shop and try to get a quote or at least a price guess/range. The radiators I saw on the i-net where all smaller in width, which I could solve with a bracket, but also costs cooling area. And as you all said: it fits and I don't have to mess with hoses again.

extra_stout · Jul 10, 2021

I think in 75 the ignition changed to the breaker less ignition with a module...

extra_stout · Jul 10, 2021

Ah... found this picture. Could be that in 75+ there is still a resistor wire...

extra_stout · Jul 12, 2021

785 (2 years warranty) vs 130 (5 years warranty) bucks... China wins even if I need two different silicone elbows, which are another 40 bucks.

Enzio · Jul 12, 2021

extra_stout said:
I measure between ground (body) and + terminal of the ignition coil.

I gotcha now! Yes there is a resistor...Duh.

extra_stout · Jul 15, 2021

The alu radiator arrived today. 4.2 kg vs 8.7 kg and 660€ savings. The radiator looks surprising well and is much more rigid than the brass radiator.
Hopefully I can finish the radiator swap at the weekend.
Still need to mess with the ignition. I also need to check for good ground of the pertronix...

I still need to make and post pictures...

extra_stout · Jul 17, 2021

Alu radiator is hanging in there! Because it is ~3 inch smaller, I had to make brackets (I knew that before). No big deal. Now the power steering pump and the oil filter gets cold air directly... It is a feature, not a bug
Hood still closes, but I had to redrill the mounting brackets of the e-fan. Overall I have the same radiator to engine clearance, but 3 rows of great chinese aluminium radiator goodness. If I have ever problems again I can buy now a radiator that is easily available.
Because brass radiator cores seem to be expensive at the moment, I have googled current scrap prices for brass/cooper. It seems, that I will get nearly 100 bucks for 3 scrap radiators... Perhaps I will wait another 10 years. Seems to be better than other investment opportunities.

Earthing/ground of pertronix is good. Also checked the battery and engine ground wire. Everything is fine. Because the e-choke gets 12V from a relay I just hooked up the pertronix 1 to the choke terminal. Wire is thick enough, perhaps I will change the fuse from 10 to 15A. A friend told me that it is running with a 10A fuse in his car fine... Do you have any experience?

The two stage thermo switch is switching both stages... So I ordered a new one. So it will take some days till I can fill up the cooling system and fire the car up.

extra_stout · Jul 17, 2021

Could all be worse...
My speedo is working perfectly

Cool sticker at the rear window (10 HP worth):

LILCBRA · Jul 17, 2021

I can't help with the Pertronix, I don't have any experience with them.

Enzio · Jul 17, 2021

Nice looking engine bay!

Progress Thread 74 Mustang II - Build as semi-daily driver

LILCBRA

I wish I didn't have all of these balls in the air

2Blue2

will be trying this sex one when I can find it

Enzio

Dang it. I was hoping mine would get 3 more inches

extra_stout

extra_stout

extra_stout

extra_stout

2Blue2

will be trying this sex one when I can find it

Enzio

Dang it. I was hoping mine would get 3 more inches

Enzio

Dang it. I was hoping mine would get 3 more inches

extra_stout

Attachments

extra_stout

extra_stout

extra_stout

Enzio

Dang it. I was hoping mine would get 3 more inches

extra_stout

extra_stout

extra_stout

LILCBRA

I wish I didn't have all of these balls in the air

Enzio

Dang it. I was hoping mine would get 3 more inches

Similar threads

Progress Thread 74 Mustang II - Build as semi-daily driver

I wish I didn't have all of these balls in the air

will be trying this sex one when I can find it

Dang it. I was hoping mine would get 3 more inches

will be trying this sex one when I can find it

Dang it. I was hoping mine would get 3 more inches

Dang it. I was hoping mine would get 3 more inches

Attachments

Dang it. I was hoping mine would get 3 more inches

I wish I didn't have all of these balls in the air

Dang it. I was hoping mine would get 3 more inches

Similar threads

Privacy & Transparency

Privacy & Transparency