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#1498923 - 09/09/13 10:22 AM M Body handling improvements
440PURSUIT Offline
pro stock

Registered: 12/17/04
Posts: 1318
Loc: DC, MD Suburbs
Just scored a clean 1980 Diplomat 2 door.

What would be some good improvements to this car?

Cop Parts or aftermarket?

Thanks


Edited by 440PURSUIT (09/09/13 11:40 AM)

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#1498924 - 09/09/13 10:23 AM Re: M Body handling improvements [Re: 440PURSUIT]
67autocross Offline
super stock

Registered: 11/29/06
Posts: 970
Loc: Manitoba Canada
1980 or 1990? I think the last year for the M was 89
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#1498925 - 09/09/13 10:23 AM Re: M Body handling improvements [Re: 440PURSUIT]
Supercuda Online   content
I Live Here

Registered: 09/04/07
Posts: 11990
Loc: West Texas
You mean 80?

Cop stuff, if you can find it, is usually cheap. Firm Feel makes some stuff for them, not cheap but quality.

I believe Mopar Muscle had a series on upgrading the M some years ago. Finally, www.dippy.org is a good resource.
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#1498926 - 09/09/13 10:24 AM Re: M Body handling improvements [Re: 67autocross]
Supercuda Online   content
I Live Here

Registered: 09/04/07
Posts: 11990
Loc: West Texas
Quote:

1980 or 1990? I think the last year for the M was 89




Got to be 80, 81 was the last year of the 2 door I believe.
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#1498927 - 09/09/13 10:30 AM Re: M Body handling improvements [Re: Supercuda]
67autocross Offline
super stock

Registered: 11/29/06
Posts: 970
Loc: Manitoba Canada
Next question how much do you want to spend?
_________________________
A new iron curtain drawn across the 49th parallel

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#1498928 - 09/09/13 11:39 AM Re: M Body handling improvements [Re: 440PURSUIT]
440PURSUIT Offline
pro stock

Registered: 12/17/04
Posts: 1318
Loc: DC, MD Suburbs
1980

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#1498929 - 09/09/13 11:43 AM Re: M Body handling improvements [Re: 440PURSUIT]
440PURSUIT Offline
pro stock

Registered: 12/17/04
Posts: 1318
Loc: DC, MD Suburbs
Wow, my iPhone did some nasty Spell changes.

I would want to be conservative spending. Other muscle projects take precedence.

C

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#1498930 - 09/09/13 12:08 PM Re: M Body handling improvements [Re: 440PURSUIT]
67autocross Offline
super stock

Registered: 11/29/06
Posts: 970
Loc: Manitoba Canada
Solid K member mounts and good front shocks would be my first items.
_________________________
A new iron curtain drawn across the 49th parallel

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#1498931 - 09/09/13 06:55 PM Re: M Body handling improvements [Re: 67autocross]
Supercuda Online   content
I Live Here

Registered: 09/04/07
Posts: 11990
Loc: West Texas
http://firmfeel.com/fmj.htm

A god place to look around
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#1498932 - 09/16/13 10:43 PM Re: M Body handling improvements [Re: 440PURSUIT]
MarkM Offline
top fuel

Registered: 01/13/05
Posts: 2027
Loc: USA, MI
How crazy are you looking to get? The weakest part of the entire package are the torsion bars in my opinion. I've got a Fifth Avenue that I pretty much did everything to and still wasn't very happy with it until I put new bars in it.

Cop sway bars, frame ties, and modifying the power steering pump will give you the biggest improvement (providing everything else is straight) for the least amount on money spent. If you really want to make it handle:

-FF 300# torsion bars
-FF aluminum K frame biscuits
-Cop 1 1/8" front sway bar (civy is only 1 1/16") with poly bushings
-Cop 3/4" rear bar with poly bushings
-Frame ties
-5 leaf rear springs
-Dump the ISO setup in the rear and run B-body shock plates
-Bilstein shocks on all four corners
-11/16" tie rods
-Modify the stock power steering pump regulator valve to turn down the pressure
-Decent tires

This is what I did to my Fifth and it handles like it's on rails now.
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'87 Fifth Avenue: 512 low deck roller / 518 / 8.75


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