Rear Sub-Frame Bushing Kits - TCCoA Forums
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post #1 of 79 (permalink) Old 03-13-2010, 08:27 PM Thread Starter
DLF
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Rear Sub-Frame Bushing Kits

I've begun the development of UHMW bushing kits to replace the stock bushings in the rear IRS sub-frame, which are no longer available from Ford.

More info HERE.

98 Toreador Red Mark VIII LSC - 13.221 @ 104.91
95 Pearl White Thunderbird SC 5spd - 12.879 @ 106.66
98 Laser Red/Black Cobra Coupe (T-56/IRS) - 12.483 @ 110.94
My Web Site
Delrin IRS Bushing Kits - UHMW Spring Perches - SS Steering Joints
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post #2 of 79 (permalink) Old 03-14-2010, 10:49 PM
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I'll be interested as soon as I get the cash. Probably a couple months away I'd say.

teksid block with forged internals, MHS stage 2 heads and cams, 80 mm 03 Mustang MAF, Bullitt intake with Accufab oval throttle body, Kooks headers, 2.5 inch catless true dual exhaust, w/x pipe and Magnaflow Magnapacks, Dirty Dog 3000 stall marauder tq converter, BC automotive built 4R70w transmission ,MMX Dynotech Drive shaft, Trac loc differential with 3.73's, custom made fssb, and lecb, rear shock tower brace by Azzkickers, JL subframe connectors, Eibach 1.5" lowering springs, koni shocks, dyno tune by Tim Barth at Mr Norm's garage
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post #3 of 79 (permalink) Old 03-17-2010, 04:09 PM Thread Starter
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There are now design renderings of the bushings, that may be viewed HERE.

98 Toreador Red Mark VIII LSC - 13.221 @ 104.91
95 Pearl White Thunderbird SC 5spd - 12.879 @ 106.66
98 Laser Red/Black Cobra Coupe (T-56/IRS) - 12.483 @ 110.94
My Web Site
Delrin IRS Bushing Kits - UHMW Spring Perches - SS Steering Joints
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post #4 of 79 (permalink) Old 03-25-2010, 09:07 PM Thread Starter
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Making progress.

The upper prototype is complete, and came out just as I had designed it. Tomorrow I'll make the lower prototype.


98 Toreador Red Mark VIII LSC - 13.221 @ 104.91
95 Pearl White Thunderbird SC 5spd - 12.879 @ 106.66
98 Laser Red/Black Cobra Coupe (T-56/IRS) - 12.483 @ 110.94
My Web Site
Delrin IRS Bushing Kits - UHMW Spring Perches - SS Steering Joints
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post #5 of 79 (permalink) Old 03-26-2010, 07:47 PM Thread Starter
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Here's a picture of the complete upper and lower bushing set.


98 Toreador Red Mark VIII LSC - 13.221 @ 104.91
95 Pearl White Thunderbird SC 5spd - 12.879 @ 106.66
98 Laser Red/Black Cobra Coupe (T-56/IRS) - 12.483 @ 110.94
My Web Site
Delrin IRS Bushing Kits - UHMW Spring Perches - SS Steering Joints
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post #6 of 79 (permalink) Old 03-27-2010, 08:14 PM
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Nice work! I had seriously considered doing this myself when I worked at a machine shop. I had 2 new factory bushings that I measured some dimensions off of. I had looked fairly quickly in a MSC catalog for polyurethane and Delrin and that would have been REALLY expensive for the right diameter. Although I just checked online and its not THAT bad. I didn't go much farther though because I needed the car on the road really soon so I bought them from the dealer.

Just curious, why the diff dia aluminum sleeves for front and rear? IIRC the bushings are the same exterior size front and rear. Is it to make the front ones a little stiffer?

1995 T-bird 4.6l - Eibach lowering springs, Cobra R hood, One 12" sub woofer, Alpine type-R front speakers. 16.249 @85.11mph 1/4 mile
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post #7 of 79 (permalink) Old 03-27-2010, 09:05 PM
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Thats awesome there is now a replacement part for the factory bushing that really is an upgrade. Can't wait to hear about the handling when you take it to the road, this was one of the last suspension parts I considered replacing but not now. I hope others will support this enough for a few batches.

Spinning pies like wheels.

DD driving my 20 year old project

Now with new ball joints...again
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post #8 of 79 (permalink) Old 03-27-2010, 10:45 PM Thread Starter
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Quote:
Originally Posted by David_viny View Post
Nice work! I had seriously considered doing this myself when I worked at a machine shop. I had 2 new factory bushings that I measured some dimensions off of. I had looked fairly quickly in a MSC catalog for polyurethane and Delrin and that would have been REALLY expensive for the right diameter. Although I just checked online and its not THAT bad. I didn't go much farther though because I needed the car on the road really soon so I bought them from the dealer.

Just curious, why the diff dia aluminum sleeves for front and rear? IIRC the bushings are the same exterior size front and rear. Is it to make the front ones a little stiffer?
Delrin isn't the correct material for this application, it's just too hard. UHMW, amongst its other properties, resists the transmission of noise and vibration due to its composition. It is damn difficult to machine, however.

Where did you get the idea that I was using two different sleeve diameters? I originally thought that I'd use two different lengths, as the stock front and rear Bushings ARE different, but upon further investigation, I'm going to use the same length for all 4 positions.

98 Toreador Red Mark VIII LSC - 13.221 @ 104.91
95 Pearl White Thunderbird SC 5spd - 12.879 @ 106.66
98 Laser Red/Black Cobra Coupe (T-56/IRS) - 12.483 @ 110.94
My Web Site
Delrin IRS Bushing Kits - UHMW Spring Perches - SS Steering Joints
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post #9 of 79 (permalink) Old 03-28-2010, 11:59 AM
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Quote:
Originally Posted by DLF View Post
Where did you get the idea that I was using two different sleeve diameters? I originally thought that I'd use two different lengths, as the stock front and rear Bushings ARE different, but upon further investigation, I'm going to use the same length for all 4 positions.
Yea, I'm retarded. I just re-read the other link and that's obviously length.

1995 T-bird 4.6l - Eibach lowering springs, Cobra R hood, One 12" sub woofer, Alpine type-R front speakers. 16.249 @85.11mph 1/4 mile
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post #10 of 79 (permalink) Old 03-30-2010, 03:31 PM Thread Starter
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There's only 1 set still available in this first batch of 6 sets, the others have all been presold.

98 Toreador Red Mark VIII LSC - 13.221 @ 104.91
95 Pearl White Thunderbird SC 5spd - 12.879 @ 106.66
98 Laser Red/Black Cobra Coupe (T-56/IRS) - 12.483 @ 110.94
My Web Site
Delrin IRS Bushing Kits - UHMW Spring Perches - SS Steering Joints
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post #11 of 79 (permalink) Old 04-05-2010, 09:08 AM Thread Starter
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Here's a picture of a full set. The first set is shipping today.


98 Toreador Red Mark VIII LSC - 13.221 @ 104.91
95 Pearl White Thunderbird SC 5spd - 12.879 @ 106.66
98 Laser Red/Black Cobra Coupe (T-56/IRS) - 12.483 @ 110.94
My Web Site
Delrin IRS Bushing Kits - UHMW Spring Perches - SS Steering Joints
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post #12 of 79 (permalink) Old 04-10-2010, 01:10 AM
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they look flawless! stupid question. what's the price on a set of this?
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post #13 of 79 (permalink) Old 04-10-2010, 04:41 AM Thread Starter
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they look flawless! stupid question. what's the price on a set of this?
$400 shipped.

98 Toreador Red Mark VIII LSC - 13.221 @ 104.91
95 Pearl White Thunderbird SC 5spd - 12.879 @ 106.66
98 Laser Red/Black Cobra Coupe (T-56/IRS) - 12.483 @ 110.94
My Web Site
Delrin IRS Bushing Kits - UHMW Spring Perches - SS Steering Joints
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post #14 of 79 (permalink) Old 04-10-2010, 02:32 PM Thread Starter
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Road and Track Results

Tested on my '95 SC

ROAD

My car is already setup pretty stiff. H&R Springs, Koni Shocks (set + 1 1/2 turns from full soft), Delrin IRS Bushings, 1 3/8" bars F&R.

Even so, I was expecting a fairly dramatic change, and a noticeable increase in NVH. However, the change wasn't all that much. There is a slight increase in harshness over expansion joints and the like, and a little more mechanical noise, but not much. I would have no issue using these mounts on a daily driver.

I made the round trip to Englishtown (70 mile round trip) today on DR's, so I didn't push too hard in the corners, but it did feel more stable. I'll take a road trip later this week on my street tires, and push a little harder.

TRACK

On 3/10/2010 @ Englishtown, I had my best previous results. The DA that night was -912 feet.

My best ever 60' was 1.765
My best ever ET was 12.925

Today I went to Englishtown again. The DA today ranged from -685 to -558 feet.

I made no changes to my car, other than the UHMW sub-frame mounts.

Same tune, gas (Exxon 93), tires (MT 275/40-17 DR's), tire pressure (20 lbs.), and the same launch RPM (3,500).

My new best 60' is 1.742, and another 1.759
My new best ET is 12.879, two others were 12.921 and 12.913

So, in worse conditions, I picked up .023 on the 60' and bettered my previous 1/4 mile time by .046.

Most noticeable was the lack of drama during shifts. Previously, the car sort of shimmied when I shifted, today I felt none of that.

I'm quite pleased with the early results. I think with more passes I can improve even more, now that the car is planted better.

98 Toreador Red Mark VIII LSC - 13.221 @ 104.91
95 Pearl White Thunderbird SC 5spd - 12.879 @ 106.66
98 Laser Red/Black Cobra Coupe (T-56/IRS) - 12.483 @ 110.94
My Web Site
Delrin IRS Bushing Kits - UHMW Spring Perches - SS Steering Joints

Last edited by DLF; 04-10-2010 at 02:45 PM.
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post #15 of 79 (permalink) Old 04-13-2010, 07:54 PM Thread Starter
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All kits that have been paid for are shipping in the morning via USPS Priority.

Only 1 kit remaining from this batch. Then it will be quite some time before another batch is available.

98 Toreador Red Mark VIII LSC - 13.221 @ 104.91
95 Pearl White Thunderbird SC 5spd - 12.879 @ 106.66
98 Laser Red/Black Cobra Coupe (T-56/IRS) - 12.483 @ 110.94
My Web Site
Delrin IRS Bushing Kits - UHMW Spring Perches - SS Steering Joints
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post #16 of 79 (permalink) Old 04-16-2010, 11:56 PM
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DLF I think you just improved the stock IRS, Are you going to test them in the mark8.

DO you think its possible to design a front lower control arm out of aluminum, that can more than handle the car weight and stresses and save unsprung weight. I have a feeling ford could have done aluminum in the front if only for the mark 8. It would also need lifetime bushings if it was to be done aftermarket.

Spinning pies like wheels.

DD driving my 20 year old project

Now with new ball joints...again
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post #17 of 79 (permalink) Old 04-17-2010, 08:19 AM Thread Starter
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DLF I think you just improved the stock IRS, Are you going to test them in the mark8.
No, my stock bushing in the LSC are fine, and it doesn't have enough power (yet!) to stress them.

Quote:
Originally Posted by Splattered View Post
DO you think its possible to design a front lower control arm out of aluminum, that can more than handle the car weight and stresses and save unsprung weight. I have a feeling ford could have done aluminum in the front if only for the mark 8. It would also need lifetime bushings if it was to be done aftermarket.
Anything's possible, but that's beyond my capabilities.

98 Toreador Red Mark VIII LSC - 13.221 @ 104.91
95 Pearl White Thunderbird SC 5spd - 12.879 @ 106.66
98 Laser Red/Black Cobra Coupe (T-56/IRS) - 12.483 @ 110.94
My Web Site
Delrin IRS Bushing Kits - UHMW Spring Perches - SS Steering Joints
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post #18 of 79 (permalink) Old 04-17-2010, 11:24 AM
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No, my stock bushing in the LSC are fine, and it doesn't have enough power (yet!) to stress them.



Anything's possible, but that's beyond my capabilities.
What about the front strut rod bushings? Ford is the only option and the aftermarket sucks. They are simple doughnuts with metal ferrules and washers.

95 4.6L Rusty Survivor!
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post #19 of 79 (permalink) Old 04-17-2010, 09:39 PM Thread Starter
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What about the front strut rod bushings? Ford is the only option and the aftermarket sucks. They are simple doughnuts with metal ferrules and washers.
The Ford parts are good, and still available, why reinvent the wheel?

98 Toreador Red Mark VIII LSC - 13.221 @ 104.91
95 Pearl White Thunderbird SC 5spd - 12.879 @ 106.66
98 Laser Red/Black Cobra Coupe (T-56/IRS) - 12.483 @ 110.94
My Web Site
Delrin IRS Bushing Kits - UHMW Spring Perches - SS Steering Joints
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post #20 of 79 (permalink) Old 04-20-2010, 11:23 AM Thread Starter
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The last set from this batch is SOLD.

Last edited by DLF; 04-20-2010 at 11:44 AM.
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post #21 of 79 (permalink) Old 04-20-2010, 12:21 PM Thread Starter
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I'm going to order the materials to make another batch, which should be ready to ship in late May.

The price will be $400 shipped (lower 48).

However, I'll offer a pre-order discount of $50 to anyone who pays in full (using the PayPal personal tab to avoid the fees), before the end of April.

98 Toreador Red Mark VIII LSC - 13.221 @ 104.91
95 Pearl White Thunderbird SC 5spd - 12.879 @ 106.66
98 Laser Red/Black Cobra Coupe (T-56/IRS) - 12.483 @ 110.94
My Web Site
Delrin IRS Bushing Kits - UHMW Spring Perches - SS Steering Joints
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post #22 of 79 (permalink) Old 05-03-2010, 11:07 AM Thread Starter
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Well, I'm not going to make any more of these until someone orders a set.

I can't afford to invest $400 + in materials and hardcoating, spend days making these, just to have them sit around.

So, the first person who orders a set will get them for $350 (paid via the PayPal personal tab), about three weeks after they make payment, and all others will have to pay $400.

98 Toreador Red Mark VIII LSC - 13.221 @ 104.91
95 Pearl White Thunderbird SC 5spd - 12.879 @ 106.66
98 Laser Red/Black Cobra Coupe (T-56/IRS) - 12.483 @ 110.94
My Web Site
Delrin IRS Bushing Kits - UHMW Spring Perches - SS Steering Joints
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post #23 of 79 (permalink) Old 05-03-2010, 11:11 AM
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I just wanted to add that even though I had perfect stock bushings in my car I had these installed yesterday. I already had Dougs Delrin kit in there . All I can say is wow. I thought the Delrin made a difference but these subfram ebushings just made my car feel so much tighter going around aggresive turns. Much better road feel. I was actually amazed. Now you will feel the bumps a bit more but my car is alreayd pretty stiff suspension wise. Great investment on my behalf

Going for broke!!!!
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post #24 of 79 (permalink) Old 08-22-2010, 01:42 AM Thread Starter
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So, the first person who orders a set will get them for $350 (paid via the PayPal personal tab), about three weeks after they make payment, and all others will have to pay $400.
This deal is off the table, as I've received an order.

Complete Sub-Frame Mount Kits will be ready to ship in a couple of weeks @ $400.

98 Toreador Red Mark VIII LSC - 13.221 @ 104.91
95 Pearl White Thunderbird SC 5spd - 12.879 @ 106.66
98 Laser Red/Black Cobra Coupe (T-56/IRS) - 12.483 @ 110.94
My Web Site
Delrin IRS Bushing Kits - UHMW Spring Perches - SS Steering Joints
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post #25 of 79 (permalink) Old 09-13-2010, 10:22 PM Thread Starter
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I've made another batch of these, 1 set is sold, 4 are currently available.

If I make another batch in the future, the price will be going up to $450 as these are a complete PITA to machine, so this is your last chance to get them at this price.

NOTE: These are not stock style rubber replacement mounts. They are designed for performance applications, as NVH will be adversely affected. You will feel, and likely hear, more than you would with the stock mounts.

$400 shipped (lower 48).

Click HERE to order.

98 Toreador Red Mark VIII LSC - 13.221 @ 104.91
95 Pearl White Thunderbird SC 5spd - 12.879 @ 106.66
98 Laser Red/Black Cobra Coupe (T-56/IRS) - 12.483 @ 110.94
My Web Site
Delrin IRS Bushing Kits - UHMW Spring Perches - SS Steering Joints
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post #26 of 79 (permalink) Old 10-14-2010, 09:28 AM Thread Starter
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** Sale - Reduced Price **

Until October 31st, I'll offer these for only $375 shipped (lower 48).

Click HERE to order.

98 Toreador Red Mark VIII LSC - 13.221 @ 104.91
95 Pearl White Thunderbird SC 5spd - 12.879 @ 106.66
98 Laser Red/Black Cobra Coupe (T-56/IRS) - 12.483 @ 110.94
My Web Site
Delrin IRS Bushing Kits - UHMW Spring Perches - SS Steering Joints
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post #27 of 79 (permalink) Old 10-22-2010, 10:14 AM
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Theoretically, I'd guess that these could further contribute to reduction of wheel hop, and driveline vibes. Given the right level of forces, I believe this could help the longevity of the driveline (or raise level of first order bending). And also reduce propensity for wheel hop / loading/unloading which results in half-shaft destruction.

Count me in as soon as I get my motor back-in, and get the mod fund to eb and flow a bit!

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post #28 of 79 (permalink) Old 10-27-2010, 02:48 PM Thread Starter
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The sale price ends soon.....

98 Toreador Red Mark VIII LSC - 13.221 @ 104.91
95 Pearl White Thunderbird SC 5spd - 12.879 @ 106.66
98 Laser Red/Black Cobra Coupe (T-56/IRS) - 12.483 @ 110.94
My Web Site
Delrin IRS Bushing Kits - UHMW Spring Perches - SS Steering Joints
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post #29 of 79 (permalink) Old 10-27-2010, 10:42 PM
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post #30 of 79 (permalink) Old 10-27-2010, 10:46 PM
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Anyone with rotted rear sub frame brackets should buy these kits since the ford rubber as New old stock is rare.

Spinning pies like wheels.

DD driving my 20 year old project

Now with new ball joints...again
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