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Messages - Aerocoupe

2
User Rides / Re: Back in a fox. 1988 Turbo Coupe. The life journal.
Interesting and it made me go read.  You are 100% correct on the torsion bar and coming off center to the point the power steering fluid can assist the turning.  What actually controls the amount of fluid in the rack that decreases the turning effort for the driver is the spool valve in the rack.  From what I understand the flow control spring in the pump is "sized" so that the pump provides a steady volume of fluid through the range of engine speed which in turn gives the right feel to the steering.  Some tech info from one of the better steering vendors:

https://www.turnone-steering.com/blogs/tech-101/pressure-vs-flow

https://www.turnone-steering.com/blogs/tech-101/debunking-the-shim-kit-theory

https://www.turnone-steering.com/blogs/tech-101/why-the-flow-control-spring-shouldnt-be-cut

Article that goes into depth on how the rack works (spool info is in here):

http://www.mustangandfords.com/how-to/drivetrain/m5lp-1207-power-steering-steered-straight

So just like you and I said its costly to change the over boosted nature of the Fox body cars but if you really want that right feel and to do it right you need to change the rack.  This also explains why I did not like the steering my buddy's Fox Mustang after the spring was cut and the comments others made on "no real change" when they cut theirs.  I don't remember how much they cut but I don't think anyone got down below an inch in length.

3
User Rides / Re: Back in a fox. 1988 Turbo Coupe. The life journal.
Tbird232ci,

By no means am I telling you what to do but I did want to mention a couple things with regards to the steering effort on our cars.  In my experience cutting the spring on the pump only increases the effort of getting the steering wheel off center.  This is due to there being zero boost when the rack is centered.  Once it breaks off center that is when the boost is applied.  The boost is regulated by the torsion bar within the rack and pinion so unless you can rebuild a rack and change this part there is very little that can be done to change the boost on a Fox rack.  One thing that seemed to help was the larger diameter SN95 V6 power steering pulley which when installed on a Fox pump would under drive it thus would help with the over boosted feeling but not to the point of what I would call decent.

To really solve the over boosted issue a 99-04 SN95 rack needs to be installed which has improved bearings and stiffer torsion bars.  Notice I said "bars".  Different models of Mustang had different racks in them and are differentiated by the SPR code on the rack which can be found as follows:



This chart shows the racks by stiffness (1-6 in order of stiffness):



Obviously the Cobra R rack is unobtainium and everyone and their dog went after the '03 & '04 Cobra racks so they are impossible to find now so I would look for a '99, '01, or '02 Cobra rack and then on to the '02-'04 GT or Mach 1.

MM's hybrid steering shaft makes the adaptation to our cars very trouble free but they are not cheap but none of this is.  From there you get into having to decide whether or not to run the Fox inner and outer tie rods or to use the SN95 parts.  All of this is here:

https://www.maximummotorsports.com/Steering-Rack-SN95-to-Fox-swap.aspx

I have done this on both my '93 Coupe and my '83 T-Bird and it was like night and day difference.
4
User Rides / Re: My 85 TBird
Please post a video when you get that Terminator motor fired up.
5
User Rides / Re: Starting fresh
What's the reasoning for the 1" spacer under the FiTech?  If you could ditch that and use a 1" drop cleaner you might be able to use a stock hood.  May have to do some metal work on the underside of the hood but others have fit 351W under a stock hood in these cars.

Making some hella progress!
6
User Rides / Re: My 85 TBird
DAAAAAAAMN!!!!  Now you are gonna have a feeding frenzy with all of us wanting to see the whole body with color. Looks fantastic man, you have to be stoked!
7
Engine Tech / Re: 83 v8 thunderbird efi swap
So I would highly suggest going aftermarket like Painless like one of these two:

https://www.painlessperformance.com/wc/p.php?s=fefi

or Ron Francis like this one:

https://www.ronfrancis.com/prodinfo.asp?number=COBRA%2D75

The reason I say this is I stripped the EEC completely out of my '83 to put the carbed 351W in it and everything works as it should.  You can take this same approach and then put an aftermarket harness in the car which will avoid stuffing at best a 27 year old harness EEC-IV from a Mustang or at best a 32 year old EEC-IV harness from a T-Bird or Cougar in it.  With the EEC-IV cars the engine harness integrates into the dash harness so everything plays better with factory harnesses.  You are not in that category so why put an old harness in the car and risk electrical issues which make a project like this a bummer.

However, if you are a wiring guru then play on with the factory harness.

As for the fuel lines there are two ways you can do this that I know of.  One is to modify the stock sending unit / fuel pump hanger assembly to accept a high pressure fuel pump like a Walbro 225 lph unit.  The pump that is currently on it is a low pressure unit that moves fuel to the high pressure pump mounted on the passenger rear subframe.  Then you will need to either find factory 5.0 fuel lines for the high pressure and return lines to the motor.  Another option would be to remove the low pressure fuel pump from the stock sending unit / fuel pump hanger assembly and weld up the holes from the fuel lines that pass through the stock sending unit / fuel pump hanger assembly and reinstall into the tank.  From here you will need to build a high pressure fuel system with a fuel filter, regulator, and return line and a way to get the fuel out of the tank like a sump.  Lots of ways to do this as the Fox Mustang guys have been doing this for years with Aeromotive pumps and the like.  You can score a set of factory Mustang fuel injector rails and install a good regulator on that. From there Aeroquip and Russell both make fittings that will connect to the stock fuel rails and allow a guy to run the Teflon lined braided fuel lines back to the tank.  So lots of ways to get fuel from the tank to the motor.

The aftermarket harnesses will have a fuel pump turn on wire or possibly even include a relay then all you have to do is wire that up to the fuel pump.

Things like a clutch switch to interrupt the start circuit so you cannot start the car unless it is in neutral is up to you.  My '83 does not have this as I just did not wire it in.

If you need the Factory wiring diagram for your car I have one scanned up and can email it to you.
8
User Rides / Re: My 85 TBird
I can only imagine how that overhead work sucked and then combine it with sandblasting. Looks really good and you will be happy you went the extra mile.

That is the one thing I regret not doing when I had my car painted in ‘98 was doing the underside. Wasn’t an issue then but now I’m seeing very small areas of surface rust. Only a few but that’s how it starts. Having the car in the shop year around and not driving it in wet weather has helped.
9
User Rides / Re: My 85 TBird
Would you hurry up and get that damn motor started already????  That is just engine bay candy right there...who doesn't love a Terminator motor?
11
User Rides / Re: My 85 TBird
So Jack is a very smart guy but I’m running a full MM setup with panhard bar and torque arm in my Coupe and do you think any of it is bolted in? The answer is no sir. It literally takes an hour per side to weld up the torque boxes. The USF and LSF connectors do nothing to strengthen these areas. With the stiffening of the chassis more power will he directed to the place of least strength so my suggestion would be to weld ‘em up and then not have to deal with it later. Good insurance if you ask me.

The uppers look great man!! Keep pushing through as they are so worth it.
12
User Rides / Re: My 85 TBird
So I looked through all my crap (electronic and physical copies) and cannot locate that article in MM&FF where they welded up the torque boxes.  I followed the article on welding them up on my Bird but for the Coupe I just welded everything up that was a seam.  The Coupe was welded up back in 2000 has seen waaaay more torture than the Bird ever has and to this day zero issues.

I would just weld up everything where the parts were spot welded together and if I would have know these existed I would have put them on my Coupe:

https://www.ebay.com/i/191676321000?chn=ps&norover=1&mkevt=1&mkrid=711-117182-37290-0&mkcid=2&itemid=191676321000&targetid=474173633709&device=c&mktype=pla&googleloc=1024240&poi=&campaignid=6469750549&mkgroupid=79220335322&rlsatarget=pla-474173633709&abcId=1141176&merchantid=6296724&gclid=EAIaIQobChMIuNm3_s385gIVs41bCh2tTAbQEAQYBCABEgKi7PD_BwE
13
User Rides / Re: My 85 TBird
I would say it would be tight to a no go but I’m not sure where things hang down and where on a power seat.

Grigg’s website does say that on ‘94+ street driven Mustangs you will have to run a manual seat track on the driver side or modify the upper subframe tube to clear the power track. Might suggest the Fox style will clear it. I do know the lower seat frame just about touches the upper subframe tube when all the way back with the seat track bolted to the rear seat of holes on the lower seat frame of a Fox Mustang seat on a manual 83 Bird seat track.
15
User Rides / Re: My 85 TBird
The difference is huge. I had the Global West Units in my car for several years before I added the uppers. Added the uppers and ran the car with them for a couple of years. The car is so stiff chassis wise you can jack the car up on the driver front corner and pick that tire up along with the passenger front and the driver rear and the doors will open and close. For reference it did not feel like the car got any stiffer with the welded in six point cage.  Realize I also have the torque boxes welded up and tied into the rear bulk head with additional plate.  Saw this in an old MM&FF magazine article years ago and did it. I think I have that article scanned and can send that to you.

On a side note the ride improved with the subframe connectors installed.