Early '85 7.5 Drums and Such August 26, 2009, 01:24:33 PM Not sure this is in the right spot, but here goes. I have what I believe to be an early '85 Turbo Coupe, and an '86. There are a few things I can think of right off that are differences, and I am wondering if these things are at all unique to an Early '85 vs a late '85.1. The 7.5 Drums have a different depth (deeper on the early ones), and the axle housings have a different length to coincide. (shafts and Track Widths are the same, which would be a correction to searched thread from '05.)2. The Cast Tube between the Turbo and Throttle Body is smooth on the earlys and finned or ribbed on the later cars. This one could just be a change for '86, please let me know if so.3. The Distributor Rotor is the dome on the early vs. the arrow style on the later cars. This may vary year to year, please let me know.Lastly, what is the build date (week or month even) where the Early '85 distinction is made?I am just trying to tie up loose ends as to whether or not these pieces and some others (on my '85) are from different year cars...or perhaps are unique to Early '85s vs. later 4-eyes.Thanks, you are all wonderfulCooter Quote Selected
Early '85 7.5 Drums and Such Reply #1 – September 01, 2009, 10:16:51 AM Quote from: CootersXR7;2883551. The 7.5 Drums have a different depth (deeper on the early ones), and the axle housings have a different length to coincide. (shafts and Track Widths are the same, which would be a correction to searched thread from '05.)No, there is no correction. The info we have been stating for a while now is correct. The 86-88 7.5's have the wider housing, but the axle lengths and track-width are the same as the earlier cars.The bolt-on dist rotor is early, the press-on one late.If your car has the green-top injectors and the in-line intake, it's an early '85. If it has the brown-tops and the square intake, it's an 85.5. The 85.5 ECU would be a PC-1 if it's a manual.This is assuming it hasn't been upgraded.The intake tube on the engine in my '86 XR4Ti was finned. On the '85TC engine I used in my Ranger swap years ago, it was smooth, as was the one on my '84 XR-7.What is the build date on your car? Quote Selected
Early '85 7.5 Drums and Such Reply #2 – September 01, 2009, 10:17:50 AM Thanks for moving this thread.In Regards to the 7.5 Axle comments, I am looking into getting the exact widths to pass along as an update to the Axle Sticky and the date for when it changed which may tie into the whole idea of pre 85.5 or not. There was a different post (before the Sticky) that showed the widths being different, so nevermind the width correction. However, I don't see that the bearing surface and location is confirmed to be the same.The finned intake tube must be a Model year change now, but if someone could confirm that I won't have to look up the revision history for the part.So the Distributor does tie in to the pre 85.5 or later theme of this thread? Cool.My '85 does indeed have the earlier intake (I haven't looked at the injectors or computer).I seem to recall a build date in March of '85, but trying to get an accurate date with my Ford Sources doesn't work anymore (it doesn't go back that far).Thanks for the reply,Cooter Quote Selected
Early '85 7.5 Drums and Such Reply #3 – September 01, 2009, 10:38:17 AM There are already exact widths of the axle housings listed in the sticky thread, in at least 2 places.I'll ask again...what is the build date of your car? Quote Selected
Early '85 7.5 Drums and Such Reply #4 – September 01, 2009, 10:48:49 AM Sorry Chuck, our posts (and my edits) have been stepping on each other... Please read my edited post.Highlights:-My concern is in the bearing surfaces.-I do not have an accurate build date but I seem to recall March of 1985 from when I got the car 8 years ago. If you have means to look it up that would be great. Quote Selected
Early '85 7.5 Drums and Such Reply #5 – September 01, 2009, 11:05:40 AM Is it not on the door tag? Quote Selected
Early '85 7.5 Drums and Such Reply #6 – September 01, 2009, 11:34:57 AM I will check the tag again, but I only remember being able to make out tire sizes (barely)...Also, please note that it is clear now that my car is an early '85 or pre '85.5. The point of this thread is to find out which items can clearly be stated as 'being different' on either side of the 85.5 cutoff date for the 85s, and also find what this date is.(As an aside, I am looking more specifically into the axle stuff to update the spreadsheet and to be sure my spare axle shaft will work.)So total items now that are one way or another between an early 85 and late 85 are?:-Injectors (Green to Brown)-Intake (Inline to Square-Distributor Rotor (Dome to Pointer)-Axle Housing (Called Tube Assembly in the Industry, as Housing is the title of what is commonly called the 'Center Section'; Length Change)-Drums (Depth Change to coincide with Axle Tube Width Change)-ECU (Not sure what is different)Anything else? Anyone disagree, or have anything to add?Thanks again,Cooter Quote Selected
Early '85 7.5 Drums and Such Reply #7 – September 01, 2009, 12:16:36 PM Quote from: CootersXR7;289298I will check the tag again, but I only remember being able to make out tire sizes (barely)...Wrong door tag. The tire size and pressure tag is on the passenger side door on my 84.The tag with the build date, gross weights etc. is on the drivers' side. Quote Selected
Early '85 7.5 Drums and Such Reply #8 – September 01, 2009, 12:31:54 PM Quote from: CootersXR7;289298-ECU (Not sure what is different)The ECU is different because the programming is different due to the different injectors. Quote Selected
Early '85 7.5 Drums and Such Reply #9 – September 03, 2009, 09:23:00 AM OK, Back at it. My '85 is indeed an early '85. It was built in the last Quarter of 1984, the date isn't fully legible, but I could make out the 84 and the first digit "1" for the month, but I can't tell if it is 10, 11, or 12. (My '86 was built in September of 85, and maybe my old Cougar XR7 was the March '85 in my early on guess, not that any of this matters).With that put to bed, does anyone know the date (or date range) for the completion of the 85.5 Changes?And are there anymore changes than this?:-Injectors (Green to Brown)-Intake (Inline to Square)-Distributor Rotor (Dome to Pointer)-Axle Housing (Called Tube Assembly in the Industry, as Housing is the title of what is commonly called the 'Center Section'; Length Change)-Drums (Depth Change to coincide with Axle Tube Width Change)-ECU (To complement different injectors)Thanks, Quote Selected
Topic: Early '85 7.5 Drums and Such (Read 1225 times)
previous topic - next topic
