Pete's 1994 Mustang GT Diary thread
4/19/10, 01:48 PM
#1581
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4/19/10, 01:56 PM
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I figured out that the driver's side arm was about 1/8" longer than the passenger side arm. I adjusted, and so far so good. I feel like there is more grip out back, but it's probably just in my head.
5/4/10, 05:18 PM
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5/4/10, 07:19 PM
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Bullitt/Mach springs are cool... but theres so much better to be had. if I had the funds mine would be gone too lol. especially if i had better shocks and struts like pete does, and a watts.
its funny to think that petes brokeass GT could outhandle my bullitt now I think.. well, if it had a competent driver
its been pretty cool to watch this car get better and better as my bullitt becomes worse and worse.
its funny to think that petes brokeass GT could outhandle my bullitt now I think.. well, if it had a competent driver
its been pretty cool to watch this car get better and better as my bullitt becomes worse and worse.
5/5/10, 05:09 PM
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Bullitt/Mach springs are cool... but Terminator's are better. if I had the funds mine would be gone too lol. especially if i had better shocks and struts like pete does, and a watts.
its funny to think that petes brokeass GT could outhandle my bullitt now I think.. well, if it had a competent driver its been pretty cool to watch this car get better and better as my bullitt becomes worse and worse.
its funny to think that petes brokeass GT could outhandle my bullitt now I think.. well, if it had a competent driver
its been pretty cool to watch this car get better and better as my bullitt becomes worse and worse.
And if he decides to overhaul that 5.0L into a stroker, watch out
5/5/10, 08:50 PM
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I am a big fan of the springs. They are absolutely amazing for stock springs. The spring rate on them is 650lb/in which is pretty stiff(stiffer than your termy springs. 
), but the Race springs I'm getting are 750-950lb/in.
I'm also looking for a set of either Race or Super Race rear springs to compensate for the height difference. I'm definitely not going to be doing a stroker motor in this car. I'm hopefully getting a job this summer to add into my "new car" fund... 96-98 Cobra 99-04 GT... or maybe I could reallistically think about that Daytona... Mmmmmmmm.
), but the Race springs I'm getting are 750-950lb/in. I'm also looking for a set of either Race or Super Race rear springs to compensate for the height difference. I'm definitely not going to be doing a stroker motor in this car. I'm hopefully getting a job this summer to add into my "new car" fund... 96-98 Cobra 99-04 GT... or maybe I could reallistically think about that Daytona... Mmmmmmmm.
5/6/10, 06:06 AM
#1593
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I forgot that mine were vert springs 550 lb/in. 
But those are still better than my cut and sagged factory ones 
Good to hear you'll be earning extra money
I'm in the slow process of recovering financially in the hopes that someday I'll get a brand new car or a slightly used one.
But those are still better than my cut and sagged factory ones Good to hear you'll be earning extra money I'm in the slow process of recovering financially in the hopes that someday I'll get a brand new car or a slightly used one.
Last edited by edumspeed; 5/6/10 at 06:09 AM.
5/8/10, 01:37 PM
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So I guess since spring rates increase slightly when they are cut, maybe cutting a coil off the rear Machs would make them as stiff as the Race springs... That would be cheaper...
Last edited by cntchds; 5/8/10 at 01:48 PM.
5/8/10, 05:14 PM
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cheap project Cobra: don't (want to) know where that hp figure got pulled out from though. 
shipping not included
http://honolulu.craigslist.org/big/cto/1726941138.html
shipping not includedhttp://honolulu.craigslist.org/big/cto/1726941138.html
5/8/10, 10:04 PM
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5/9/10, 01:10 PM
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cheap project Cobra: don't (want to) know where that hp figure got pulled out from though. shipping not included
http://honolulu.craigslist.org/big/cto/1726941138.html
shipping not includedhttp://honolulu.craigslist.org/big/cto/1726941138.html
5/9/10, 01:14 PM
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That won't increase the spring rate, but decrease it instead bec. it will have less coil tension, and by the fact the spring will heat up in the cutting process, it will harm it even more. The old front springs my car had were only cut half a coil, and you saw how bad they were.
Originally Posted by gt40mkII
Hooke's law does not deal with actual changes to the spring itself (which would result in a change to k - the spring constant.)
Short Version
-------------
The typical automotive suspension coil spring is made from steel alloy wire with a constant diameter. The formula for this kind of spring is:[/LEFT][INDENT]rate = ( wireDiameter^4 * 1470000 ) / ( coilDiameter^3 * numCoils )
If we cut coils, we reduce the number of coils and the rate, according to the above formula, goes up.
To think of it another way. A coil spring is essentially a torsion bar that is bent around a center axis. Compressing the coil effectively twists the coiled bar. The formula for a torsion bar is:
SR = TR x BD4 / BL x LL2
Where:
SR = Spring Rate
BD = Bar Diameter
BL = Bar Length
LL = Lever Length
Cutting a coil effectively reduces the length of the torsion bar. Again, looking at the above equation for a torsion bar, the shorter the bar the higher the spring rate.
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Short Version
-------------
The typical automotive suspension coil spring is made from steel alloy wire with a constant diameter. The formula for this kind of spring is:[/LEFT][INDENT]rate = ( wireDiameter^4 * 1470000 ) / ( coilDiameter^3 * numCoils )
If we cut coils, we reduce the number of coils and the rate, according to the above formula, goes up.
To think of it another way. A coil spring is essentially a torsion bar that is bent around a center axis. Compressing the coil effectively twists the coiled bar. The formula for a torsion bar is:
SR = TR x BD4 / BL x LL2
Where:
SR = Spring Rate
BD = Bar Diameter
BL = Bar Length
LL = Lever Length
Cutting a coil effectively reduces the length of the torsion bar. Again, looking at the above equation for a torsion bar, the shorter the bar the higher the spring rate.
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