Springs

[Tflong24]

All, I hope this particular discussion on springs hasn't been discussed, but I want to get some advice. As many of you out there, I would prefer for the rear of my Boss to be a little lower, maybe an inch max. However, I haven't tracked my car(yet), and even if/when I do, I will be a newbie. With that said there are some springs available now that lower the car and improve handling supposedly. Like others I am waiting for Boss specific FRPP springs. My main question is, to solve the rear height issue do you handling experts out there think just installing say the steeda Boss REAR springs without installing the front would hurt overall handling balance. Like I said, I'm no road race expert, but I do like the balance of the Boss now and wouldnt want to change it dramatically. But I would like to get rid of that what seems six inch tire/fender gap in the rear.

Thanks.

 

[steveespo]

M-5300-P



Lowered my Brembo GT 1.125" F/1.0" R Springs are slightly stiffer front and rear than Boss. Ride is still decent, little more chop over expansion strips etc. Hanling is super with less brake dive and better transition reaction. my car pulls 1.39g on the track and I think it has even more with a better driver.
Steve

 

[ihatepotholess]

your car looks amazing!

why does it look so much lower than Rick's (5 dot 0) car?

 

[Tflong24]

M-5300-P



Lowered my Brembo GT 1.125" F/1.0" R Springs are slightly stiffer front and rear than Boss. Ride is still decent, little more chop over expansion strips etc. Hanling is super with less brake dive and better transition reaction. my car pulls 1.39g on the track and I think it has even more with a better driver.

My main question is, to solve the rear height issue do you handling experts out there think just installing say the steeda Boss REAR springs without installing the front would hurt overall handling balance.
Steve

 

[HackBoss2901]

Tom, I've looked into solving the same problem. I've found no springs that offer a spring rate close enough to factory specs to lower the rear without upsetting the balance if you only changed the rear springs. I'm considering the Steeda Boss springs as well, but for now I'm going to wait.

 

[Tflong24]

Tom, I've looked into solving the same problem. I've found no springs that offer a spring rate close enough to factory specs to lower the rear without upsetting the balance if you only changed the rear springs. I'm considering the Steeda Boss springs as well, but for now I'm going to wait.

Thanks Hack. I am happy with the front stance and spring rate, but as you said it will totally change the rear as far as spring rate. So I'm at a loss. I don't really want to lower or even replace the fronts but for sure want to level the look in the rear. I guess I'll wait and see what comes out of FRPP.

 

[VoodooBoss]

I am happy with the front stance and spring rate, but as you said it will totally change the rear as far as spring rate. So I'm at a loss. I don't really want to lower or even replace the fronts but for sure want to level the look in the rear. I guess I'll wait and see what comes out of FRPP.

The P springs will lower your car 1' in the back and about a 1/4" in the front. The Boss lowering springs are not dead but I have no idea when they will be available. We've been waiting for a while but I don't think it's going to be much longer.

 

[steveespo]

The springs do settle about 1/4" more after use. I was at about 3/4" lower on both ends when they first were installed.
Steve

 

[PeteInCT]

Steve - looks sweet !

 

[adam81]

Tom, I've looked into solving the same problem. I've found no springs that offer a spring rate close enough to factory specs to lower the rear without upsetting the balance if you only changed the rear springs. I'm considering the Steeda Boss springs as well, but for now I'm going to wait.

Thanks Hack. I am happy with the front stance and spring rate, but as you said it will totally change the rear as far as spring rate. So I'm at a loss. I don't really want to lower or even replace the fronts but for sure want to level the look in the rear. I guess I'll wait and see what comes out of FRPP.

The 5300-P springs will work great for you if you want something now....

 

[Tflong24]

Tom, I've looked into solving the same problem. I've found no springs that offer a spring rate close enough to factory specs to lower the rear without upsetting the balance if you only changed the rear springs. I'm considering the Steeda Boss springs as well, but for now I'm going to wait.

Thanks Hack. I am happy with the front stance and spring rate, but as you said it will totally change the rear as far as spring rate. So I'm at a loss. I don't really want to lower or even replace the fronts but for sure want to level the look in the rear. I guess I'll wait and see what comes out of FRPP.

The 5300-P springs will work great for you if you want something now....

Are you talking about just the rears. My main question from the beginning is whether I can lower the rear ONLY without upsetting the handling balance. I am happy with the front height.

 

[300AGT]

Ok just putting this out there you could try a 55D spring . Its a rear only spring set they go for about $ 120 dollars and you can get at http://www.brembo50.com/ . This spring is made to lower the back of the Brembo GT 1/2 inch. It got the same working srping rate as the stock rear bermbo GT spring has over it travel .The spring should be a little sofer than the Boss 302 rear spring is and I am thinking it may make the car understeer a little more than the stock spring dose . But at $120 dollars it really easy to change the rear spring ( may take a half hour to get it done) you could give it a try and see if you like the way they work and the way the car looks. If you dont like them it not like you are out a lot of money and it easy to put the stock springs back in .

On my brembo GT i run the stock Brembo front spring with the 55D spring in the back with some Koni STR.t shock & sturts and for me it make a great DD set up.

 

[Tflong24]

Ok just putting this out there you could try a 55D spring . Its a rear only spring set they go for about $ 120 dollars and you can get at http://www.brembo50.com/ . This spring is made to lower the back of the Brembo GT 1/2 inch. It got the same working srping rate as the stock rear bermbo GT spring has over it travel .The spring should be a little sofer than the Boss 302 rear spring is and I am thinking it may make the car understeer a little more than the stock spring dose . But at $120 dollars it really easy to change the rear spring ( may take a half hour to get it done) you could give it a try and see if you like the way they work and the way the car looks. If you dont like them it not like you are out a lot of money and it easy to put the stock springs back in .

On my brembo GT i run the stock Brembo front spring with the 55D spring in the back with some Koni STR.t shock & sturts and for me it make a great DD set up.

300AGT, thanks for the advise. I am looking for about a 1" drop in the rear. What I think I might end up doing is either waiting on FRPP Boss springs and just installing the rears, or do the same with the Steeda Boss springs if FRPP never comes through. I know this may change handling some, but i am not a pro driver, so I doubt I will notice that much. As long as the car stays what I consider "loose" prone, I will be happy. I have yet to make my car push, but it sure is easy to get the rear out.

 

[2boss4u]

I feel the same way as Tfong24. just want to lower the car a little. Not an avid road racer but will track it alittle for fun. More interested in looks without hurting the car. I am leaning to the ford racing p springs at this time. My car will be here in 2 weeks. I know it sits too high, have seen a few .

 

[VoodooBoss]

The P springs lower it enough for me and they don't compromise the ride much. The 4x4 look is gone. Maybe you'll get lucky and the Boss lowering springs will be available soon after yours arrives.

 

[Justin]

Ok just putting this out there you could try a 55D spring . Its a rear only spring set they go for about $ 120 dollars and you can get at http://www.brembo50.com/ . This spring is made to lower the back of the Brembo GT 1/2 inch. It got the same working srping rate as the stock rear bermbo GT spring has over it travel .The spring should be a little sofer than the Boss 302 rear spring is and I am thinking it may make the car understeer a little more than the stock spring dose . But at $120 dollars it really easy to change the rear spring ( may take a half hour to get it done) you could give it a try and see if you like the way they work and the way the car looks. If you dont like them it not like you are out a lot of money and it easy to put the stock springs back in .

On my brembo GT i run the stock Brembo front spring with the 55D spring in the back with some Koni STR.t shock & sturts and for me it make a great DD set up.

how do you get them for 120? the site says 139.99 I assume that shipping is extra?

 

[BossJockey]

I read that the Steeda Competition rear springs are the same rate as the stock Boss rear springs. You may want to try them. If they work well let me know so I can get some.

See post #12 for the rates.
http://forums.themustangsource.com/f813/spring-options-494617/

 

[T1000]

Great post and Info guys, question I have on lowering the rear with the "P springs", Steeda or the 55D do you have to make an adjustment to the panhard bar, or will the factory bar and setting be ok?

 

[2012YellowBoss]

Great post and Info guys, question I have on lowering the rear with the "P springs", Steeda or the 55D do you have to make an adjustment to the panhard bar, or will the factory bar and setting be ok?

With the P springs you need to get an adjustable panhard to center the rear. I don't know about the others but would assume it is the same. IMHO, I think the Ford Racing parts are the way to go. It seems to me they have be track tested more then any others, I could be wrong but that is what I have seen.

 

[300AGT]

Sorry i got one the first sets of 55D spring and they were $119.00 then. I quest they when up in price from when i got mine. There no need for a adjustable panhard bar with the 55D spring .