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What do staggered rear shocks mean?
#11
Well the fact is. I must have gotten the shaft, because, I still have my original H code Mach I I ordered back in Jan 1972 from Condit ford in Newton NJ. If you CARE too look and check my vin in PERSON. I will put the car on the lift and you tell me I'M wrong. The real facts is in the writing. READ THEM. IF you have the original sales brochure from (let say) 72. There was no Vari ratio power steering . SPRINGS, I really can't prove that ( Rears springs been replaced). My new leaf springs had a much flatter arch (unloaded) compared too my original's, because I wanted comp style springs SHOCKS, Ford didn't care, as long as it had some. My original oil pan was so beat up (as a kid), that I made a skid plate. SO much for stiffer shocks. My parts cars {Couple's} had the same shocks. My wife's 67 coupe should have had been a S code 390, just by measuring front coils and comparing to factory Eaton spring specs. FACT WAS, It was only a C code 289. There is a lot of inaccurate information out here. I really don't care to argue the facts, as I'm too old too care. The fastbacks got the same suspension as a Mach, just E-70 not 78's
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#12
Out of curiosity why did the A\C option dictate the rear gear size???

Thanks!
Wade
1972 Mach 1 351 cj 4speed
"We confide in our strength, without boasting of it; we respect that of others, without fearing it."--Thomas Jefferson

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#13
It was because Ford didn’t want the a/c components spinning so fast on a regular basis is my best guess. You could get lower gears, 3.00, 2.75 and so on, just nothing more than the 3.25.

run_horse Run Horse Run!
John 72 Q Code
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#14
scgamecock, just as jpaz posted, it came down to the limitations of the AC compressors. At the time Ford was using York and Tecumseh AC compressors which were as good as any in the 70's. In fact the Tecumseh which had a cast iron housing was used in a lot of F600-F800 trucks with factory air.
The problem with the 3.91, 4.11, 4.30 cars was the extreme load imposed on the compressors when the sudden increase of extreme RPM's subjected them to stress they just were not engineered to handle. In fact in the 60's you could not get AC with any solid lifter engine since Ford knew how they were geared and how they would be driven. (High perf 289, 66 Police Interceptor 428, 427's and all Boss engines)

Steve

No Officer...I really don't know how fast I was going, my speedometer stopped at 140!
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#15
(10-01-2018, 10:16 PM)red351 Wrote: Well the fact is.    I must have gotten the shaft,   because,  I still have my original H code Mach I I ordered back in Jan 1972  from Condit ford in Newton NJ. If you CARE too look and check  my vin in PERSON.   I will put the car on the lift and you tell me I'M wrong. The real facts is in the writing. READ THEM. IF you have the original sales brochure from (let say)  72. There was  no Vari ratio power steering .  SPRINGS,   I really can't prove that ( Rears springs been replaced). My new leaf springs had a much flatter arch (unloaded) compared too my original's, because I wanted comp style springs  SHOCKS, Ford didn't care, as long as it had some. My original oil pan was so beat up (as a kid), that I made a skid plate. SO much for stiffer shocks. My parts cars {Couple's} had the same shocks.    My wife's 67 coupe should have had been a S code 390, just by measuring front coils and comparing to factory Eaton spring specs. FACT WAS, It was only a C code 289.    There is a lot of inaccurate information out here.  I really don't care to argue the facts, as I'm too old too care. The fastbacks got the same suspension as a Mach, just E-70 not 78's

So let me get this straight- these are the facts, don't dispute my facts, but I'm not going to back up my facts so don't question my facts. Speaking of inaccurate information, that post above is a bunch of it. Apparently, you are not too old to care. 

Fact - ALL Mach 1s had some flavor of the competition suspension package as standard equipment. 2V cars didn't get the rear bar or staggered shocks. 

Fact - Variable ratio steering was included with CS if you opted for power steering

Fact - CS springs and shocks were unique to the package and varied depending upon option load out. 

Supporting docs - see attached image below with snips of the 71 Facts book. You can view it at this link:

https://www.7173mustangs.com/attachment.php?aid=11017

also attached 1972 rear spring chart from the 65-75 MPC. Notice the different spring callouts w/ and w/ CS springs and that ALL 63R body code springs have "w/competition suspension" noted. 

thumb


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#16
(10-02-2018, 11:28 AM)secluff Wrote: scgamecock, just as jpaz posted, it came down to the limitations of the AC compressors. At the time Ford was using York and Tecumseh AC compressors which were as good as any in the 70's. In fact the Tecumseh which had a cast iron housing was used in a lot of F600-F800 trucks with factory air.
The problem with the 3.91, 4.11, 4.30 cars was the extreme load imposed on the compressors when the sudden increase of extreme RPM's subjected them to stress they just were not engineered to handle. In fact in the 60's you could not get AC with any solid lifter engine since Ford knew how they were geared and how they would be driven. (High perf 289, 66 Police Interceptor 428, 427's and all Boss engines)

Hmmm this kinda throws a curve ball at my engine and rear end plans.  I was planning on running a solid flat tappet cam and 3:90 gears. Undecided Undecided  I don't plan on drag racing the car so routine high rpms wouldn't be an issue.

Thanks!
Wade
1972 Mach 1 351 cj 4speed
"We confide in our strength, without boasting of it; we respect that of others, without fearing it."--Thomas Jefferson

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#17
3.90 gears and a 4 speed you would be turning some pretty high rpms just cruising on the highway. Assuming a 26" tall tire at 70 mph you would be turning over 3,500 rpm. Just a heads up.

'73 Grandé H Code. Headman long tube headers, T-5 Transmission, 3.70 Traclok, Lowered 1" all around, Aussie 2v heads w/ 2.19 intake, 1.71 exhaust, screw in studs, full roller cam 608/612 lift 280/281 duration LSA 112, Quick Fuel 750 CFM double pumper, AirGap intake.

'73 F code convertible. Bright red. Needs total restore. (IE HOT MESS)

- Jason
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#18
Well Mr. Hemi. The fact is, I'm glad you posted it in fords own words as to WHAT CAME STANDARD with the Mach vin #05. CS was only STANDARD if it was a 4V engine. There was no 4V 302. The 302 2V was the base engine. The 2V 351 option would cost you about $40 more. The standard Mach came without CS, so there would be no V-R steering, no HD suspension, or rear sway bar. It all very clear, if you would sit down and read ALL OF IT.

No need to apologize
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#19
(10-03-2018, 05:59 AM)scgamecock Wrote:
(10-02-2018, 11:28 AM)secluff Wrote: scgamecock, just as jpaz posted, it came down to the limitations of the AC compressors. At the time Ford was using York and Tecumseh AC compressors which were as good as any in the 70's. In fact the Tecumseh which had a cast iron housing was used in a lot of F600-F800 trucks with factory air.
The problem with the 3.91, 4.11, 4.30 cars was the extreme load imposed on the compressors when the sudden increase of extreme RPM's subjected them to stress they just were not engineered to handle. In fact in the 60's you could not get AC with any solid lifter engine since Ford knew how they were geared and how they would be driven. (High perf 289, 66 Police Interceptor 428, 427's and all Boss engines)

Hmmm this kinda throws a curve ball at my engine and rear end plans.  I was planning on running a solid flat tappet cam and 3:90 gears. Undecided Undecided  I don't plan on drag racing the car so routine high rpms wouldn't be an issue.

Run any gear you want just do not turn on the air when you are going to wind it up. The compressor is not engaged by the magnetic clutch unless you turn on the air inside the car. One of the first things I did when I got my car brand new was to pull the belt off the air cond., lol. Needed all the HP I could get.
Build the car you want and put into it what you want.


When a man is in the woods and talks and no women are there is he still wrong??
Tongue
David
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#20
(10-03-2018, 05:59 AM)cgamecock Wrote:
(10-02-2018, 11:28 AM)secluff Wrote: scgamecock, just as jpaz posted, it came down to the limitations of the AC compressors. At the time Ford was using York and Tecumseh AC compressors which were as good as any in the 70's. In fact the Tecumseh which had a cast iron housing was used in a lot of F600-F800 trucks with factory air.
The problem with the 3.91, 4.11, 4.30 cars was the extreme load imposed on the compressors when the sudden increase of extreme RPM's subjected them to stress they just were not engineered to handle. In fact in the 60's you could not get AC with any solid lifter engine since Ford knew how they were geared and how they would be driven. (High perf 289, 66 Police Interceptor 428, 427's and all Boss engines)

Hmmm this kinda throws a curve ball at my engine and rear end plans.  I was planning on running a solid flat tappet cam and 3:90 gears. Undecided Undecided  I don't plan on drag racing the car so routine high rpms wouldn't be an issue.

Don't let this scare you away from what you want to build. You just need to catch your breath and step away and think about how you are going to use your car. Show Queen, weekend cruiser, occasional driver, or a everyday ride makes a lot of difference. My mention about the solid lifter engines from Ford was in reference to a general non availability of AC and automatic trans since it was generally known how these engines would be used. Anyone that was willing to pay almost $500.00 for a 271/289 (High perf 289) over the 2bl 289 ($105) or 4bl 289 ($158) knew that it wasn't going to be used by Grandma to drive to the  ladies weekly sewing and knitting club.
My high school buddy owned a 70 Mercury Cyclone SCJ 429 with the 4.30 gear. A hour ride in it would have your ears ringing for the rest of the day. Was an absolute blast to drive something that felt like it was trying to push your eyeballs through the back of your head. The NO gas mileage aside, it was just a hot noisy ride where any trips were planned on where the gas stations were.
As David posted you can do as I did in my Mach 1 and just cut the AC off if you thought you were going to get involved in some sort of red light "Confrontation". My 85 GT has a micro switch so when you go to WOT it opens the circuit to the field coil. Nice to have but also just as easy to flip the off switch.
Still your car, as we always say, we all just want to help you make an informed decision. A lot of folks here have the "Been There Done That and Have the T-Shirt".  Big Grin

Steve

No Officer...I really don't know how fast I was going, my speedometer stopped at 140!
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