TIMJG Page 226 of the 70-72 6th edition clarification question

[Stan B.]

Hello again everyone.
On page 226 of the 70-72 6th edition TIMJG it shows a list about the front spring broadcast codes
What does it mean:
350 under 720 3931823 HS
350 over 720 3931824 HT

I realize there are different part numbers but what does "under 720 and over 720" mean???
Thanks and sorry if this is an obvious question.

[Ron G.]

Re: TIMJG Page 226 of the 70-72 6th edition clarification question

Could possibly be PSI.

[Terry M.]

Re: TIMJG Page 226 of the 70-72 6th edition clarification question

Could possibly be PSI.

Stan & Ron
I think the value is pounds per inch of travel, but I will have to do some checking when I get home.

[Jeffrey S.]

Re: TIMJG Page 226 of the 70-72 6th edition clarification question

I think it has to do with the weight each wheel carries. You start with a base for a car with no options and add the weight of each option. These weights are in the shop manual.

[Joe L.]

Re: TIMJG Page 226 of the 70-72 6th edition clarification question

I think it has to do with the weight each wheel carries. You start with a base for a car with no options and add the weight of each option. These weights are in the shop manual.

Jeffrey------


Correct. That's what it refers to. It's also in the AIM's.

[Edward J.]

Re: TIMJG Page 226 of the 70-72 6th edition clarification question

Stan the broadcast codes HS/HT one is for A/C and the other is w/o. A/C. Correct me if I am wrong guys.

[Joe L.]

Re: TIMJG Page 226 of the 70-72 6th edition clarification question

Stan the broadcast codes HS/HT one is for A/C and the other is w/o. A/C. Correct me if I am wrong guys.

Edward-------


I think what it amounts to is that it usually requires A/C to get to the "over 720". However, there may be other combinations of options that would also get a car to "over 720".

[Terry M.]

Re: TIMJG Page 226 of the 70-72 6th edition clarification question

Jeffrey------


Correct. That's what it refers to. It's also in the AIM's.

I agree. Too bad we don't have a "like" button here.

[Stan B.]

Re: TIMJG Page 226 of the 70-72 6th edition clarification question

Fascinating stuff!
Thank you all.

[Mark F.]

Re: TIMJG Page 226 of the 70-72 6th edition clarification question

Edward-------I think what it amounts to is that it usually requires A/C to get to the "over 720". However, there may be other combinations of options that would also get a car to "over 720".

Guys - I guess I'm just not following -
the lightest front curb weight I see for a '70, '71 or '72 is 1,574 lbs. (1970 conv.).
1,574 lbs./2 is 787 lbs. split between both front springs.
That's already over 720 lbs. with no added option weight.
What am I missing here?
How do we get below the 720 per side if the base car is already over that?
PS - have not had any coffee yet

[Terry M.]

Re: TIMJG Page 226 of the 70-72 6th edition clarification question

Here is where that information in the 1970-72 TIM&JG came from: The 1970 AIM.

spring rates.jpg

[Mark F.]

Re: TIMJG Page 226 of the 70-72 6th edition clarification question

Here is where that information in the 1970-72 TIM&JG came from: The 1970 AIM.

[ATTACH=CONFIG]104349[/ATTACH]

[Terry M.]

Re: TIMJG Page 226 of the 70-72 6th edition clarification question

There is also the fact that the spring is not at the outboard end of the control arm.

No coffee here, and not enough sleep either.