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  • Drag Suspension Setup

    Soft front springs, firm rear springs, Dial in your instant center to keep the rear of the car from squatting or coming up, is that a good place to start? Where does the rear ride height usually end up compared to stock, for a "good" instant center, Fox/Sn95, stock suspension mounting points.
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  • #2
    What works for a drag radial car with a stick is going to be completely different than on a 28x10.5 tire car with a transbrake.

    For me personally I'd start with adjustable rear shocks, a good anti-roll bar and aftermarket control arms with spherical bushings. That's after reinforcing the torque boxes and doing subframe connectors though.

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    • #3
      Originally posted by BP View Post
      What works for a drag radial car with a stick is going to be completely different than on a 28x10.5 tire car with a transbrake.

      For me personally I'd start with adjustable rear shocks, a good anti-roll bar and aftermarket control arms with spherical bushings. That's after reinforcing the torque boxes and doing subframe connectors though.
      I already have everything you mentioned. Lets say drag radial with a stick.
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      • #4
        Might be easier with the slick and stick.

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        • #5
          slick and stick. Much easier to optimize on a stick car imho.

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          • #6
            What are some general tuning principles with front and rear springs and ride height?
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            • #7
              i'd honestly just search for someone who has done the hard part with a combination similar to yours, and then fine tune from there. I can help find a build. whats the combo?

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              • #8
                Originally posted by Tremor14 View Post
                i'd honestly just search for someone who has done the hard part with a combination similar to yours, and then fine tune from there. I can help find a build. whats the combo?
                I am just looking for general suspension tuning advice really, I am thinking of building a n/a high 9 second car that focuses on suspension vs raw power, I'd like to know how to make a stock suspension mustang hook, on a drag radial, trans is up in the air at this point. I'd really like to know about instant center/percentage of rise/anti squat etc for the rear, and spring setup for the front and rear.
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                • #9
                  Originally posted by Mach1 View Post
                  I am just looking for general suspension tuning advice really, I am thinking of building a n/a high 9 second car that focuses on suspension vs raw power, I'd like to know how to make a stock suspension mustang hook, on a drag radial, trans is up in the air at this point. I'd really like to know about instant center/percentage of rise/anti squat etc for the rear, and spring setup for the front and rear.
                  I've followed the rule of "make the bottom bar level/parallel to the ground at ride height." On my current car I have cut the rear spring to get the bottom bar level on a 26" tire. I've run the mickey thompson 235/60 radial and the 26x8.5 slicks with similar results on the same combo. In the rear I have adjustable uppers and lowers from wolfe with the stock spring location cup on the lower bar, and 10 way strange shocks. I also run 10 way strange in the front. This combo is probably very close to low 10's high 9's (ran 6.59@106 1/8th so far.)

                  Last year I ran a 302/t5 on 26x8.5 slicks(same suspension stuff but with much looser shock settings) and went 7.40. I think the stock location holes, a level lower bar and some good adjustable shocks will be all you need to go high 9's. You might look into the team Z upper rear relocation kit, I've read a bunch of good stuff about it. Its supposed to correct the instant center for fox bodies, you might even call team Z and ask them what it corrects it to and they may tell you the information you're after.

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                  • #10
                    Originally posted by Blue88Coupe View Post
                    I've followed the rule of "make the bottom bar level/parallel to the ground at ride height." On my current car I have cut the rear spring to get the bottom bar level on a 26" tire. I've run the mickey thompson 235/60 radial and the 26x8.5 slicks with similar results on the same combo. In the rear I have adjustable uppers and lowers from wolfe with the stock spring location cup on the lower bar, and 10 way strange shocks. I also run 10 way strange in the front. This combo is probably very close to low 10's high 9's (ran 6.59@106 1/8th so far.)

                    Last year I ran a 302/t5 on 26x8.5 slicks(same suspension stuff but with much looser shock settings) and went 7.40. I think the stock location holes, a level lower bar and some good adjustable shocks will be all you need to go high 9's. You might look into the team Z upper rear relocation kit, I've read a bunch of good stuff about it. Its supposed to correct the instant center for fox bodies, you might even call team Z and ask them what it corrects it to and they may tell you the information you're after.
                    Nice, thank you! What kind of 60's are you cutting?
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                    • #11
                      Originally posted by Mach1 View Post
                      Nice, thank you! What kind of 60's are you cutting?
                      I've been cutting 1.56/1.57 on 8# pretty regularly. This past weekend I turned it up and left on 14# and went 1.53 once or twice. I'm hoping to get a 1.4x next time out.

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                      • #12
                        I dug through my time slips from this past weekend and went a 1.51, that was the fastest ever 60'. It wasn't a good pass though cause I was hitting boost cut dialing in the boost controller. Here is a pass from this past weekend probably a 1.54 60' never mind the popping and banging from the other car.


                        You'll be able to leave a lot harder than this setup with a clutch, i Leave off the trans brake at 3500. Last year with the 5 speed I'd dump the clutch at 5500 302/t5/4.56/26" and it would tote the front tire but the 60' was only around 1.55. I did a bunch of reading on the stick/radial when I had the t5 because I wanted to run on the street and what I *read* (not actually tested first hand) was that the stick would tear the stiffer sidewalls out of the radials pretty quick so I wound up just running my slicks everywhere.

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                        • #13
                          So the idea on the team z UCA mounts appears to raise the UCA axle side mounting point to help with the instant center, I wonder if an offset bushing would do the job, I bet it would have issues rotating in the bushing "housing" on the axle.
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                          • #14
                            I'd ask this guy...

                            [ame]http://www.youtube.com/watch?v=bmPiiEbW668&sns=em[/ame]

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                            • #15
                              damn

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