Gt-12

[gwaii]

http://www.bfgoodrichtires.ca/tire-selector/name/g-force-sport-tires

i'm looking at these for tires in a 235/40/17 rear,205/40/17 front.

 

[Sasquatch_Ryda]

I like the second set. Looks like the old Shelby mustang wheels!

 

[gwaii]

that's exactly what they are designed after.but they want over $400 a pop,the others are about 230.

 

[Sasquatch_Ryda]

wow! For that price, I like the torque thrust style just as much!

 

[gwaii]

wow! For that price, I like the torque thrust style just as much!

that's sort of what i was thinking.

 

[gwaii]

well,done deal.

the rims are on the way-i went with the first style,$1120 delivered,tax in.

 

[Sasquatch_Ryda]

Yeehaw!

 

[gwaii]

ya,still have to wait till i can afford tires-but at least i can bolt on some bling.

 

[superds]

Any more progress on this awesome build?

 

[gwaii]

minor stuff,been waiting on front suspension components,and other work stuff needs to be done.

 

[COPPERHEAD85]

Friggin work always gets in the way....................But my Vacation started at 12 noon today!
Gotta get tires for the wifes jeep,do some work on the house then its junk yard surfing the rest of the week.

 

[gwaii]

Vacation.

what's that?

 

[gwaii]

so,i've been dealing with a little problem since welding on the upper spring mounts.i could not budge the rear suspension,even when i jumped on it the springs wouldn't compress a bit.
i know the jag rear was set up for a much heavier car,so i figured there must be some preload on the springs.when i took a spring off the shock,i found exactly 2 1/2" preload.
some quick calculations determined a spring rate of 170lb/in,so 2 1/2"=425lbs just to start it moving....and theres two springs on each side,for 850 lbs/side.
but it's not quite so bad,as the spring is 4" down a 12" arm,so that must be multiplied by .66 for 561 lbs per side.so i would need to put over 1100lbs on the back of the car just to get the springs to start to move.

my plan is to cut 1 1/2 coils from each spring,giving it only 1/4" preload.this will raise the spring rate to about 190 lb/in,for a total per side of 380lb/in,times the .66 for 250 lb/in each side.
i only need a little over 1 1/2" of compression at the spring for ride height,so this works out to a total load on the rear of around 750lbs.

i think this gets me into working range.

 

[martin]

When you narrowed the rear end it put the springs into a more vertical position, effectively reducing the springs effort on the suspension. Have you taken that into account?

 

[gwaii]

yes.they are now in a near vertical position,so it makes the calculations a bit easier.
another thing that i had to get used to was the short travel,i'm used to doing these calculations for long travel truck suspensions-1 1/2" travel at the spring for full droop seems plain weird.my total travel(measured at the wheel)is 4".