Who makes a 500-550 lbs/inch rate front lowering spring for 67-68? - Vintage Mustang Forums
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post #1 of 10 (permalink) Old 08-16-2019, 12:52 AM Thread Starter
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Who makes a 500-550 lbs/inch rate front lowering spring for 67-68?

Hi guys, most of the lowering springs I see are 600-620lbs/in rate.

Does anyone out there make a quality 1-1.5” lowering spring with 500-550lbs/inch rate?

Will be complimenting these with Bilstein shocks.

Thanks

1967 Mustang
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post #2 of 10 (permalink) Old 08-16-2019, 01:28 AM
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I got mine from NPD, part number 5310-2B for a SBF, 5310-2A if you have a BBF.

1967 Mustang, mild 351W, 750 Demon, MSD, Pertronix, long tubes, Dan williams built top loader with Hurst shifter, #550 coils, 5 leaf mid-eye springs, 3:55's, CSRP disc brakes.
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post #3 of 10 (permalink) Old 08-16-2019, 01:30 AM Thread Starter
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do you have a pic showing how your car sits with those?

1967 Mustang
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post #4 of 10 (permalink) Old 08-16-2019, 01:37 AM
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This is how the car sat with stock suspension and the 550 coils and 5 leaf mideye rear springs.
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File Type: jpg file-21.jpg (312.8 KB, 16 views)

1967 Mustang, mild 351W, 750 Demon, MSD, Pertronix, long tubes, Dan williams built top loader with Hurst shifter, #550 coils, 5 leaf mid-eye springs, 3:55's, CSRP disc brakes.
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post #5 of 10 (permalink) Old 08-16-2019, 01:52 AM Thread Starter
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Wow that looks perfect... and lower than I expected!

Is that with or without Shelby drop?

Are the front coils in trimmed?

No lowering blocks in the rear?

What’s the size and backspacing of the wheels?

Thanks for the help!

1967 Mustang
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post #6 of 10 (permalink) Old 08-16-2019, 04:37 AM
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Global West S26 springs are what you want . The S27's (which are stiffer) are being used on my '68 fastback in my sig picture, but there's actually a poly spacer to raise the front end an inch.

1969 Convertible field find (450hp spaghetti noodle)
1968 Fastback (428 and a 4 speed)
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post #7 of 10 (permalink) Old 08-16-2019, 01:23 PM
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Quote:
Originally Posted by sycostang67 View Post
I got mine from NPD, part number 5310-2B for a SBF, 5310-2A if you have a BBF.
We've been having these springs produced exclusively for us (550 lb rate, 1-inch lowering) literally for decades now, by the same U.S. Manufacturer. They are, and always have been, right on the money.. And I dig our grey metallic powder coating, makes them look like a spring, not a lollipop.. LOL

Rick
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post #8 of 10 (permalink) Old 08-16-2019, 01:29 PM
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Short trip over to Livermore to see Maier Racing. Mike is a great guy and will get you taken care of.
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post #9 of 10 (permalink) Old 08-16-2019, 02:02 PM
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Luke87gt...... sent you a PM.

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post #10 of 10 (permalink) Old 08-17-2019, 01:39 AM
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Quote:
Originally Posted by luke87gt View Post
Wow that looks perfect... and lower than I expected!

Is that with or without Shelby drop?

Are the front coils in trimmed?

No lowering blocks in the rear?

What’s the size and backspacing of the wheels?

Thanks for the help!
That first pic, everything is stock except for the springs, no cut coils or blocks, just the 550 coils and 5 leaf mid-eye leaf springs. The rear shackles are from NPD as well and are adjustable but I have them on the higher of the 2 settings.

In my sig pic, I have the same springs but have done the shelby drop. Unfortunately it lowered the car to much for my liking and I put some 1" poly coil spacers in which pretty much set the car back to where it was before the shelby drop.

Wheels are 17x7 with 4" BS on the front and 17x8 with 4.5" BS on the rear.

1967 Mustang, mild 351W, 750 Demon, MSD, Pertronix, long tubes, Dan williams built top loader with Hurst shifter, #550 coils, 5 leaf mid-eye springs, 3:55's, CSRP disc brakes.
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