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smithmod
06-10-2019, 08:21 AM
We need to pull out the old backup car and need some advice to help get us as close as possible right out of the gate. Car is an 07 Smackdown. I have the S7 spindles and the new updated 4 bar mounts to put on it but we never raced either before. Does anyone have any baseline set up thoughts for us on this car? With the updated front end, I want to make sure I have what I need under it. Any help would be appreciated. TIA
MasterSbilt_Racer
06-10-2019, 12:26 PM
We need to pull out the old backup car and need some advice to help get us as close as possible right out of the gate. Car is an 07 Smackdown. I have the S7 spindles and the new updated 4 bar mounts to put on it but we never raced either before. Does anyone have any baseline set up thoughts for us on this car? With the updated front end, I want to make sure I have what I need under it. Any help would be appreciated. TIA

What is your primary car?
smithmod
06-10-2019, 01:10 PM
'14 Pierce
MasterSbilt_Racer
06-10-2019, 01:55 PM
Crossmember still in 07 location?
smithmod
06-10-2019, 02:36 PM
We were told by the previous owner that the Right side frame rail was raised but I don't know about the cross member. Is there an easy way to tell?
MasterSbilt_Racer
06-11-2019, 10:14 AM
If it isn't flat, its probably original, I would guess.
MasterSbilt_Racer
06-11-2019, 01:47 PM
Set your ride height at 3.5" both fronts with s7 spindles. Set rear ride heights. Measure all pin to pin.
500# of spring. 275# rf spring
150# lr spring or stack of your choice. 250# rf spring

Lf 550# at ride height pin to pin
Rf 600# at ride height pin to pin.
Lr 700# at ride height pin to pin.
Rr 330# at ride height pin to pin.

Rf 1400# at ride height pin to pin minus 3"
Rf 2400# at ride height pin to pin minus 3.75"
Rf 2800# at ride height pin to pin minus 4"
MasterSbilt_Racer
06-11-2019, 01:48 PM
500# lf spring above. And 250# rr spring

This all assumes a 2007 crossmember and may still bottom out.
MachineMasters
06-11-2019, 02:45 PM
I'd go with what MasterSbilt_Racer said above.
My only change would be a stiffer RF spring where I'd do a 325 or a 350, but depends on driving style, track, etc. of course.
MasterSbilt_Racer
06-11-2019, 04:26 PM
I'd go with what MasterSbilt_Racer said above.
My only change would be a stiffer RF spring where I'd do a 325 or a 350, but depends on driving style, track, etc. of course.

We ran a 300 a lot. Went as high as 350 sometimes. I think that's a fair suggestion. Really depends on bump situation.
smithmod
06-12-2019, 09:16 AM
Thanks guys! We appreciate the help.
smithmod
06-12-2019, 09:21 AM
Do I need to shim the rack and pinion up when we put the S7 spindles on? and what's the purpose for that? I have another MastersBilt driver that says they had to do this.
MasterSbilt_Racer
06-12-2019, 10:46 AM
Do I need to shim the rack and pinion up when we put the S7 spindles on? and what's the purpose for that? I have another MastersBilt driver that says they had to do this.

I can't remember. That may be right. I'd just check bumpsteer once you are done. That would be the reason to do it.