H0SS302

would ford alphabet c springs work like that too? they are progressive to arnt they?

Texas_Hot_Rods

Let us know when you're ready for some boost, Paxton is wanting to hook us up on some new technology for cheap and we always have a killer deal on Prochargers, KB's, and Whipples!

Texas_Hot_Rods

[blockquote]
Ford Motorsport "B"springs are progressive"C" springs are linear.

Linear springs...no matter how hard you compress them, they will always have the same resistance

Progressive springs...the harder you compress them, the more resistive they become...thats why the progressive springs have a 425-530 lb/in rating...first inch they are 425 in/lb and then get more resistive after that

The reason the progressive springs are good for stock strutsis because they do part of the dampining. Linear springs do not do any of the dampening.

Make sense?

The softer B springs would allow for more stored energy for launching the car thus improving weight transfer. The stiffer the spring the less stored energy for launching the car and hence less weight transfer.

If you're looking for track times, then stick with the softer springs. If you want handling then go for the stiffer springs.

Here's the specs...

M-5300-C:
Lowers 1979-94 Mustangs - Front .875" - Rear .5"
Lowers 1994-04 Mustangs - Front 1.125" - Rear .750"
Spring Rate - Front 650 - Rear 200/300


M-5300-B:
Lowers 1979-94 Mustangs - Front .875" - Rear .5"
Lowers 1994-04 Mustangs - Front 1.125" - Rear .750"
Spring Rate - Front 425/530 - Rear 200/300

More Specifically here's a few more rates for comparison sake...



Stock Spring Rates

Model/Year
Front Spring Rate (lb/in)
Rear Spring Rate (lb/in)

Mustang GT/V6 Coupe 1994-2004
450 (linear)
210 (linear, solid axle)

Mustang GT/V6 Vert. 1994-2004
400 (linear)
185 (linear, solid axle)

Mustang Cobra Coupe 1999-2001
500 (linear)
475 (linear, IRS)

Mustang Cobra Coupe 2003-2004
600 (linear)
600 (linear, IRS)

Mustang Cobra Vert. 2003-2004
500 (linear)
470 (linear, IRS)

Mustang Mach1 Coupe 2003-2004
600 (linear)
250 (linear, solid axle)

Mustang Bullitt Coupe 2001-20022
600 (linear)
250 (linear, solid axle)




Aftermarket Spring Rates

Manufacturer/Part Info
Front Spring Rate (lb/in)
Rear Spring Rate (lb/in)

Ford Racing B Springs (M5300B)
425-530 (progressive)
200-300 (progressive, solid axle)

Ford Racing C Springs (M5300C)
650 (linear)
200-300 (progressive, solid axle)

Ford Racing F Springs (M5300F)
460-570 (progressive)
170-310 (progressive, solid axle)

Ford Racing G Springs (M5300G)
500-570 (progressive)
170-310 (progressive, solid axle)

Eibach Pro-Kit Springs (94-04 Mustangs)
425-530 (progressive)
200-300 (progressive, solid axle)

Eibach Sportline Springs (79-04 Mustangs)
425-630 (progressive)
140-295 (progressive, solid axle)

H&R Sport Springs (94-04 Mustangs)
490-575 (progressive)
205-250 (progressive, solid axle)

H&R Sport Springs (99-04 Cobra)
700-760 (progressive)
685 (linear, IRS)

H&R Super Sport Springs (94-04 Mustangs)
700-760 (progressive)
275-300 (progressive, solid axle)

H&R Race Springs (79-04 Mustangs)
750-850 (progressive)
260-280 (progressive, solid axle)

H&R Race Springs (99-04 Cobra)
750-850 (progressive)
770 (linear, IRS)

Steeda Sport Springs (79-04 Mustangs)
650 (linear)
200-250 (progressive, solid axle)

Steeda Sport Springs (03-04 Cobra)
720-780 (progressive)
650-790 (progressive, IRS)

Steeda Competition Springs (79-04 Mustangs)
750-850 (progressive)
250 (linear, solid axle)

StangSuspension Springs (94-04 Mustangs)
490-575 (progressive)
205-250 (progressive, solid axle)




Hope this helps...Brian



[/blockquote]

stacy532

My name is stacy and I have 2 stangs one is a 95 cobra with a d1sc procharger e cam and canfield heads , I dont have any track times its still in the shop... But my dd is a 2004 gt its always felt the part of a 16 second car kinda sluggish off the line ... I ran it with my mt et drags a week ago , it also has a bisanni o/r x pipe , and a pieced together cai, and 3.73 gears .. 14.29 @95.11mph is all she would do with a 5000rpm launch ....I did some math on your 12.0 second pass in the same air as my car is running in and it is figuring up around a 12.6 at 106mph ... here are some figures im trying to do up here on the plains do you think its possible?

lets try some dragstrip math
2004gt 5000rpm launch =14.29 @95mph lol<4400' air


70mm tb + plenum +underdrive pullies and aluminum driveshaft =26hp and .29 better in the 1/4 mile
so with a 6000 rpm 1.75 60' launch =13.65at 99mph

next mods being long tubes and mid pipe 35hp = 0.36 better in the 1/4 mile =13.29 at 102mph


next mods being 90/10 struts 10 way strange shocks control arms and weld front wheels , cat back or mufflers and

and loose all junk in trunk 100lbs worth , id say .0.31 seconds better? and get a 1.65 60' =13.15 at 103mph


last timming adjuster and lightning 90mm mass air meter and a tune , 0.19 seconds better..

.
could this car run a 12.79 at 104.85 in lubbock without heads or cam work ?

red93z

awesome thread!!!


how much slower would this setup be with an auto?

dimebag

lets be serious tho, how nesacery was the cai really?[&:][8D]

w8less

i cant help but think some 4cylnder springs might have helped

stacy532

talking about mine its got the fender well of a mac and the tb side is a bbk?

ColinGT

That is sick ****, but you launched the hell outta it. on stock axles? Damn

dimebag

im very , very tempted to do this, pricing it all out now, i dont see myself having a problem doing it(e/t wise), and itll be cheaper then a s/c set up...