Coil spring selection.

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Aug 22, 2017 | 10:09 AM

Oldcrowbarber

Thread Starter

Mountain Pass

Joined: Jan 2016

Posts: 191

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From: Old Fort TN

Coil spring selection.

I'm dropping a sbf 302 in my 67. The engine will have aluminum heads and intake. 2 sets of coil springs are listed for the bump side truck 6cy or 8cy springs.

I know the inline 6 full dressed weight around 490-560lbs. And most V8 choices for this truck was a FE 252-390 weighing in around 650-700 lbs.... Now a 302 weighs around 460-500lbs. And once I start swapping aluminum heads and intake it Will be even lighter.

So with the weight so close to the inline 6 should I use the 6cyl spring?

Aug 22, 2017 | 11:36 AM

ultraranger

Lead Driver

Joined: Apr 2011

Posts: 6,399

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From: El Dorado, Arkansas

I currently have an inline 240/C-4 but plan to swap to a 5.0L/5.8L engine/4R70W transmission. I swapped to front disc brakes in 2014 with a front disc suspension from a '77 F100.

At the time I installed this disc brake/suspension setup on my '69 F100 Ranger, I also installed new Moog CC808 progressive rate coil springs.

Aug 22, 2017 | 11:58 AM

NumberDummy

Ford Parts Specialist

Joined: Nov 2006

Posts: 88,826

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From: Simi Valley, CA

1967/70 F100/250 240/300 I-6 & 1971 F100/250 240/300 I-6 before serial number M00,001: The standard equipment front springs have a 1055 lbs. load rate.

1967/70 F100/250 240/300 I-6; 1971 F100/250 240/300 I-6 before serial number M00,001: The optional front springs (standard equipment with V8's except Camper Special) have a 1155 lbs. load rate.

V8's were also available with optional 1250 lbs. & 1300 lbs. load rate front springs.

1967 F100/350: 240 I-6 standard equipment; 300 I-6 & 352 optional. 240 not available with Camper Special.

Sep 3, 2017 | 01:10 PM

Jackassrock

New User

Joined: Sep 2017

Posts: 10

Likes: 1

From: Cincinnati

Here's a question from a newb.
Are the CC808s a direct replacement for a '69 f-100?
The old ones on my truck have a pigtailed end, and the 808s I've seen in pictures don't. Do I have to buy a different bushing to install these or something?

Sep 3, 2017 | 01:34 PM

ultraranger

Lead Driver

Joined: Apr 2011

Posts: 6,399

Likes: 40

From: El Dorado, Arkansas

Quote:

Originally Posted by Jackassrock

There are no bushings on the springs. They just attach to the spring seat at the lower end on top of the radius arm/I-beam and the upper end of the coil spring is just indexed into the pocket of the spring 'bucket'.

This was on a '72 F100 I had converted to front discs and installed the Moog CC808 progressive springs on.

This was on my own '69 F100 I converted to front discs and installed the Moog CC808 springs on.

Sep 4, 2017 | 07:19 AM

Jackassrock

New User

Joined: Sep 2017

Posts: 10

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From: Cincinnati

I see now what happened. I was seeing some pics that weren't the actual spring I was looking for in my google search. All good now.

Aug 12, 2023 | 05:24 PM

RTT

Fleet Mechanic

Joined: Apr 2017

Posts: 1,391

Likes: 106

From: COSMOS

Quote:

Originally Posted by NumberDummy

Is the rating for a V 8 1155lbs. for both springs or 1 spring ??? I am guessing 1 spring since truck weigh 4000 lbs. I guess.............How much does a truck weigh

I ask these questions cuz , I bought some new Jeep coil springs for a song & & they look to be the almost identical to my current springs on my 1971 truck . Only problem is it looks like the load rating is only 660lbs .
I do not know if that is lbs/inch but I think it is total for the spring . Would you think a 2007 -20018 wrangler Unlimited would have that small a spring rating ,660lbs

Jeep has a tow rate of 2000lbs. & load capacity of 1000lbs . I wonder if these ratings includes the weight of the JEEP , which I say a JEEP weighs 2000lbs so now I am confused....ha.......

My truck has a GVW of 4450lbs. & 1290lbs. at the pad , what ever that means ............lol.........So I guess a Bumpside has twice the strength of a 2013 JEEP