Question about sensors, intake, MSD for tach, electric fan etc

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Milalynne

Well-known member
Joined
Aug 4, 2024
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Location
Bedford Texas
My Car
1971 Mustang Mach 1 Yellow gold
Sorry I tried to look through past post but after pages and pages from post over 10 years old I felt its going to be easier to create new one.

1. I have the MSD PM6425, It says I can hook up a tachometer to it. Is this ideal, any benefits etc? I do not have a tach yet but I am waiting to hear back from the fellow that can turn your clock to a tach but i thing he is pretty backed up so for now im just going to get a stand alone unit. I have my first road race at Hallet Motor Speedway Fun Race is what they call it at the two day Hallet even for the Mid American Shelby and Mustang 4 day event in the Tulsa Oklahoma area.

2. None of my gauges work as the previous owner put his heavily modified 351C in place while he rebuilt the original motor, I was able to get the original motor shipped to me which will stay packaged up. But the intake is the Edelbrock RPM Air Gap intake, Does the oil pressure sensor go in the back of the block or back the intake on the 71 351C ?

3. If I am going to be doing some road racing on weekends. naturally I need my Tach, oil pressure, temp gauge. Any other gauge/info that I should add to it?

4. I have the basic Fan driven belt setup, my dad and my brother love their electric fan on their 70's era vettes. I was wondering for my road racing should I go ahead and get a nice electric fan, where I can control what temp it turns on etc. (I took my Air conditioner off as I do not need it) but it could free a small amount of horse power and possible give it better cooling ability. The problem is there are so many too choose from. I learned from a post on here 12 years ago that you have to be careful and not get one built in China, I was hoping to hear how anyone that has one likes their, the brand, their thoughts etc. Money is not an object in my situation in this fan and gauge project ???
 
1 - The aftermarket tach and the tach conversion from rocketman are easier than the stock 71-73 mustang tachs. The one you're looking at just needs 12v+, ground, and ther directly hook up a wire to your coil or ignition box. As close to plug and play as you'll get.

2 - Oil pressure sender is in the top of the block behind the intake.

3 and 4 are kind of open ended and come down to personal preference. There are a million different gauges out there and at some point, somebody thought they were worth having. I like an AFR gauge. Vacuum/boost is nice to have. And most cars with optional gauges have some sort of amp/volt meter to monitor your charging.

With your goal of road racing, you could go with a stupid simple switch to turn on your fan. Turn it on, race, turn it off. You dont really care for it going on and off during the race. I use dual fans and an adjustable thermostat probe, with a switch to override it. It seems to work well.
 
1 - The aftermarket tach and the tach conversion from rocketman are easier than the stock 71-73 mustang tachs. The one you're looking at just needs 12v+, ground, and ther directly hook up a wire to your coil or ignition box. As close to plug and play as you'll get.

2 - Oil pressure sender is in the top of the block behind the intake.

3 and 4 are kind of open ended and come down to personal preference. There are a million different gauges out there and at some point, somebody thought they were worth having. I like an AFR gauge. Vacuum/boost is nice to have. And most cars with optional gauges have some sort of amp/volt meter to monitor your charging.

With your goal of road racing, you could go with a stupid simple switch to turn on your fan. Turn it on, race, turn it off. You dont really care for it going on and off during the race. I use dual fans and an adjustable thermostat probe, with a switch to override it. It seems to work well.
Thank you for 1 and 2 question, amp/volt is a great idea, do you mind if I get the information that is if you have for what fan system you went with it, and explain the adjustable thermostat probe to me just a little. Thank you so much you have been very helpful!
 
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