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Old 05-06-2016, 09:54 AM   #1
Mkn95u0
 
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how will 1" lowering springs affect my 1/4 runs?

Just looking for some feedback / information in terms of suspension. I'm not really familiar with how it will affect it or what i should look for in suspension.

likely continue to do drag racing.
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Old 05-06-2016, 10:00 AM   #2
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I installed Eibach Pro springs in my ZL1 and it made no difference in 60' times. I too thought it may negatively affect my dragstrip launch and weight transfer. Fortunately, this was not the case.
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Old 05-06-2016, 10:08 AM   #3
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Guarantee they will affect your launch. The stock springs have always yielded better squat and 60' times than lowering springs. I lost .1 to .15
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Old 05-06-2016, 01:10 PM   #4
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Guarantee they will affect your launch. The stock springs have always yielded better squat and 60' times than lowering springs. I lost .1 to .15
so lowering springs will negatively impact most 60' times & launches? Is it just recommended to keep the stock springs, or is there a better alternative?
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12.012 @ 115.75mph DA: 2371 | 486rwhp/467rwtq (11/8/2015)M
11.265 @ 123.55mph DA: 2318 | 526rwhp/532rwtq (11/19/2016)M
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10.609 @ 130.19 DA: 975 | 675rwhp/629rwtq (2/16/2020)D
Build: E-Force w/ 3.25" pulley (11lbs of boost), 10% OD under pulley, Fore Dual Fuel System, ID850's, AEM CAI, Borla Long Tubes, Flowmaster Super 10's, Circle D 3200 converter 258mm triple disc lockup, cam 226/242 116+4 LSA, ZL-1 Rear end, E85 & BRC Raceworks Tune (previously known as CMS)
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Old 05-06-2016, 06:29 PM   #5
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On a good drag radial with a 1" drop I went 1.46 10.05
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Old 05-06-2016, 06:36 PM   #6
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1.25 drop, M6 1.56 60' No difference here.
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Old 05-06-2016, 11:27 PM   #7
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Interesting convo.

I'd like to lower my car 1.0 front and rear.
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Old 05-07-2016, 01:40 AM   #8
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1in drop requires camber bolts so you have the most rubber on the ground during a launch.
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Old 05-07-2016, 04:52 AM   #9
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I've been running Eibach's pro kit for years and managed to cut a 1.60 60' on stock tires and NT05's. I can see it hurting with weight transfer due to the stiffness of the springs though. I never ran the car on stock suspension.

I will be upgrading to coilovers here in the next month or so to try to get more out of my car.
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Old 05-07-2016, 05:27 AM   #10
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Never ran mine on the stock springs. Made over 170 passes with my lowering springs. Never once gave it a thought, as drag racing was not on my priority list of concerns for lowering my ride. Looks and handling were the factors for me.
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Old 05-07-2016, 07:05 AM   #11
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Quote:
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Guarantee they will affect your launch. The stock springs have always yielded better squat and 60' times than lowering springs. I lost .1 to .15
I'm working with Jordan from JDP on my coiler settings for the new Ride Tech's and He want's almost full stiff in the rear and full loose in the front. Jordan say's with IRS you don't want the rear to squat. Custom spring rates as well 350 in the front and 550 in the rear, stock is 300/500.

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Old 05-07-2016, 07:11 AM   #12
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1"+ lowered 1.63 60's.


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Old 05-07-2016, 07:39 AM   #13
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woTVz_bwoDY&fs=1">woTVz_bwoDY&fs=1" type="application/x-shockwave-flash" width="855" height="505">

1.56 and still leaving soft. I also play with spring rubbers to stiffen the rear even more. I'll put them in later today and take a picture for you guys. But the IRS definitely does not like squat. Squat means loosing time going forward...... To an extent..
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Old 05-07-2016, 07:40 AM   #14
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https://youtu.be/woTVz_bwoDY
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