Rear Suspension help

RDY4WAR · August 10th, 2011, 11:14 AM

I'm setting the rear suspension for drag racing and I'm not sure on what spring I should go with. I have the other parts in already, just can't decide on a spring to match them. I did some searches online and found mixed reviews of what works with what setup and everything just seems so vague.

I've been considering 3 options; 1) keep the OEM springs, 2) Moroso trick drag springs, or 3) Steeda progressive rear drag springs.

From what I've read, the Moroso springs make the car actually sit slightly higher and don't do much better performance wise vs the stock suspension. I've also read that the Steeda springs are too stiff and without an anti-roll bar, won't do much good. Due to the cons of both of them, I've been considering just sticking with the OEM springs, but I do want a little better performance.

The current setup is all stock 4 cylinder suspension. What will be going in next weekend will be UPR adjustable upper and lower control arms and Strange 10 way adjustable shocks. The car is a stock long block 5.0L 302 carb'd with full bolt-ons. The stock E7 heads are slightly ported. I have an AOD with TCI "Saturday Night Special" torque converter, external fluid cooler, and Silverfox SPT-1 valve body. The rear end is an 8.8" rear with 4.10s, t-lok, c-clip eliminators, Moser 28 spline axles, and extended studs.

With that setup, I plan to launch on the car pretty hard so I'm looking for what spring is going to work best for those hard launches with the other suspension parts mentioned above. Thanks in advance.

MustangMatt96GT · August 10th, 2011, 11:58 AM

Springs are not as important as geometery. If you look at baseline suspensions relocated upper control arms that really improved my car. My car 60' the exact same every pass on the same tune up. He has some really really good information on his website aswell on how to set the cars up.

RDY4WAR · August 10th, 2011, 12:06 PM

Gotcha. Yeah, I just got off the phone with UPR and they advised to just keep the OEM springs and worry more with the shocks and control arms. Just put a bag in the passenger side rear to combat the roll.

ReverendDexter · August 10th, 2011, 12:13 PM

I know Team Z's recommendation is the stock spring with a coil cut off.

August 10th, 2011, 11:14 AM	#1
RDY4WAR I Post Entirely Way Too Much 07 Turbo Focus 12.93 @ 105mph Join Date: Feb 2010 Location: Glen Burnie, MD Posts: 6,006 iTrader: 0 reviews	Rear Suspension help I'm setting the rear suspension for drag racing and I'm not sure on what spring I should go with. I have the other parts in already, just can't decide on a spring to match them. I did some searches online and found mixed reviews of what works with what setup and everything just seems so vague. I've been considering 3 options; 1) keep the OEM springs, 2) Moroso trick drag springs, or 3) Steeda progressive rear drag springs. From what I've read, the Moroso springs make the car actually sit slightly higher and don't do much better performance wise vs the stock suspension. I've also read that the Steeda springs are too stiff and without an anti-roll bar, won't do much good. Due to the cons of both of them, I've been considering just sticking with the OEM springs, but I do want a little better performance. The current setup is all stock 4 cylinder suspension. What will be going in next weekend will be UPR adjustable upper and lower control arms and Strange 10 way adjustable shocks. The car is a stock long block 5.0L 302 carb'd with full bolt-ons. The stock E7 heads are slightly ported. I have an AOD with TCI "Saturday Night Special" torque converter, external fluid cooler, and Silverfox SPT-1 valve body. The rear end is an 8.8" rear with 4.10s, t-lok, c-clip eliminators, Moser 28 spline axles, and extended studs. With that setup, I plan to launch on the car pretty hard so I'm looking for what spring is going to work best for those hard launches with the other suspension parts mentioned above. Thanks in advance. __________________ 2007 Focus - 230/215, cams/head/manifold swap done, new #s soon ...going E85! 1985 Bronco - 351W & 4WD 1986 Mustang LX - 351W build in the works! David Michael Smith, 07/25/1956 - 12/08/2011 ...R.I.P dad! I miss you dearly! Last edited by RDY4WAR; August 10th, 2011 at 11:50 AM.

August 10th, 2011, 11:58 AM	#2
MustangMatt96GT Proud American 1996 Mustang GT Join Date: Dec 2006 Location: Lakewood, CO Posts: 10,689 iTrader: 3 reviews	Springs are not as important as geometery. If you look at baseline suspensions relocated upper control arms that really improved my car. My car 60' the exact same every pass on the same tune up. He has some really really good information on his website aswell on how to set the cars up. __________________ RIP Travis Billings Special Thanks to: Andrews Racing Transmissions Baseline Suspensions 25.3 SFI Chassis Build Never Lift Racecars

August 10th, 2011, 12:06 PM	#3
RDY4WAR I Post Entirely Way Too Much 07 Turbo Focus 12.93 @ 105mph Join Date: Feb 2010 Location: Glen Burnie, MD Posts: 6,006 iTrader: 0 reviews	Gotcha. Yeah, I just got off the phone with UPR and they advised to just keep the OEM springs and worry more with the shocks and control arms. Just put a bag in the passenger side rear to combat the roll. __________________ 2007 Focus - 230/215, cams/head/manifold swap done, new #s soon ...going E85! 1985 Bronco - 351W & 4WD 1986 Mustang LX - 351W build in the works! David Michael Smith, 07/25/1956 - 12/08/2011 ...R.I.P dad! I miss you dearly!

August 10th, 2011, 12:13 PM	#4
ReverendDexter Priest of the Car Gods Clapped-out '90 GT 'vert ~5.5 seconds off TTOD :( Join Date: Jan 2007 Location: Rohnert Park, CA Posts: 13,808 iTrader: 0 reviews	I know Team Z's recommendation is the stock spring with a coil cut off. __________________ O o /¯/______________________ \|BLAAAAAAAAAAAAAAAAAAAAAAAAARGH!!! \_\

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