koni yellows w/ stock brembo springs?
- Thread starter Fun4me
- Start date
that sounds like a great option how much was the Boss springs
the link he sent me was $190
thanks for the info, learned something today and will be following this thread as im looking to get the yellows also, just not sure of the spring. good luck fun4me.
That was one of my previous plans. The actual Boss springs, not the Steeda ones made for the Boss. Currently running Boss shocks and struts with P springs on my GT.
The 55D springs are not as stiff as the Boss springs. 55D springs are lower...I've been meaning to throw them on the Boss just to see.
I have all three...I'd go with the P springs. Very happy with them so far on my GT. Going to the track with this setup (finally) this weekend.
The P springs work with my original top mounts and the Boss struts, so you should be good to go for fit. I'm thinking of switching to the Koni yellows too...at some point.
BTW, 26" tall tires look small even with the drop from the P springs. For the street, it looked way better with taller 27.7" tall 275/40/19, or the stock 255s.
Front Sway Rear Sway Front Springs Rear Springs
Base GT
34.6 mm 24mm 123 lbs. 156 lbs.
Brembo
34.6 mm 24mm 131 lbs. 167 lbs.
Boss 302
34.6 mm 25mm 148 lbs. 186 lbs.
Laguna Seca 34.6 mm 26mm 137 lbs. 191 lbs.
* measured in pound force inch (lbf-in)
Base GT
34.6 mm 24mm 123 lbs. 156 lbs.
Brembo
34.6 mm 24mm 131 lbs. 167 lbs.
Boss 302
34.6 mm 25mm 148 lbs. 186 lbs.
Laguna Seca 34.6 mm 26mm 137 lbs. 191 lbs.
* measured in pound force inch (lbf-in)
The P spring rates are a bit of a mystery. Supposedly they're the same rate as the K springs and I've found a tested variable rate of 173-239F / 195-236R.
The trouble with figuring the drop numbers from different springs is all the different tires that come with the different cars stock. The Boss has the same front tire as a Brembo GT, but the rear is .3" shorter so it will 'lower' the rear ~.15" compared to the Brembo.
So, no drop in the front and .15" rear w/ the Boss vs Brembo?
Would P springs be ok for a DD? With the wife in the car?
Anybody do P springs and leave the stock LCA, panhard, etc?
No...that was just for the stock tire variation. Supposedly the Boss is about 1/2" (11mm) lower in the front, and 1mm in the back...based on the Ford marketing info. What I was getting at is that I don't know if the quoted 1mm in the rear came from the tire or springs.
Yes...I think so, with a tall enough tire. Depends on your wife...mine is okay with the Boss ride. I think it matters more if you change anything else in the suspension, and the type of joints you use.
I'm still on the stock LCAs for now, but changed the panhard to center the axle. I was still with the stock one with the 55D springs and it was close enough to center for me.
So in your opinion, why are the P springs better than the Boss springs?
Or for that matter, is there a pronounced differance between the Brembo
springs and the P springs?(handeling)
How hard is it to change them out? Might try all 3 if its not too hard.
Rear is easy, front's not as much. Need to remove the strut assembly and compress to spring to remove. Then locate all the ball bearings you just dropped out of the strut mount bearing and re-pack. Reverse the procedure and realign the front end.
So about as hard as swapping the strut and spring. Shitty.
Are cc plates necessary for a "p spring" drop?
My guess is you will need plates or bolts.
P springs are better for handling, looks, reduced brake dive. I think this is the way the Boss should have come stock!
There's a huge difference between the Brembo and P springs.
Changing springs isn't *that* hard if you have the right tools...not so bad if you have enough tools...sux if you don't. I didn't drop any of my bearings, but I made sure the mount didn't separate when I took apart the strut assemblies.
Ok, but p springs require supporting mods. Not everyone wants to change Lca's, Add brackets, cc plates/bolts. It seems like the the oem Boss springs offer better handeling, cheap and easy.
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