rear coil spring update - Pontiac GTO Forum
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post #1 of 22 (permalink) Old 02-22-2010, 11:07 PM Thread Starter
 
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rear coil spring update

well I had to get a coil spring compressor because these spring are real stiff. I think some of you guys might be right about fitment. I think they are going to be to stiff and will probably sit to high. I also have to do some modifying on the spring compressor. The center bolt is to long (11 inches) and once I install the spring I wont be able to take the spring compressor apart so im thinking of cutting the bolt so its shorter (6 inches). The only thing is once I cut the center bolt the spring compressor will be GTO (or any other car that uses our style coil spring) only. Any other thoughts on this. The coil spring compressor was 35.00 dollarsat auto zone and well worth it real good quality ---Danfigg
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post #2 of 22 (permalink) Old 02-23-2010, 11:25 AM Thread Starter
 
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disreguard above. I got another coil spring compressor 35.00 dollars from Royal auto parts that works from the outside of the coil spring much better. I also was bottomed out with the other coil spring compressor thinking the coil spring was real tight. So know I have two types of coil spring compressors to add to my tools. The inside one for taller springs and the outside type for shorter springs and it also works with struts as well.----danfigg
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post #3 of 22 (permalink) Old 02-23-2010, 02:04 PM
 
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post #4 of 22 (permalink) Old 02-28-2010, 07:01 PM
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Few poeple have replaced more GTO rear coils than myself. Granted doing one of our Drag coils are a little more challenging, but I have never used a spring compressor at the rear. Granted, a compressor can make life a little easier.

for a really big spring install in the rear, with the rear on jack stands, the only thing I do is disconnect the sway bar end link, and lower shock mount. I do not remove the tire.

You can have a neighbor or helper stand on the lower wheel lip, and then put the upper spring seat in first, then with a small pry bar, lift up the bottom coil and role it into the lower seat.

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post #5 of 22 (permalink) Old 03-02-2010, 07:15 PM
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Quote:
Originally Posted by dms View Post
Few poeple have replaced more GTO rear coils than myself. Granted doing one of our Drag coils are a little more challenging, but I have never used a spring compressor at the rear. Granted, a compressor can make life a little easier.

for a really big spring install in the rear, with the rear on jack stands, the only thing I do is disconnect the sway bar end link, and lower shock mount. I do not remove the tire.

You can have a neighbor or helper stand on the lower wheel lip, and then put the upper spring seat in first, then with a small pry bar, lift up the bottom coil and role it into the lower seat.

mike
dms
True Mike but you haven't tried to install springs made for another car on it either . He got some springs that were "close" to the GTO springs

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post #6 of 22 (permalink) Old 03-03-2010, 11:33 AM
 
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Update?



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post #7 of 22 (permalink) Old 03-04-2010, 01:04 AM Thread Starter
 
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re

If the weather cooperates it looks like I will put them in tomorrow. Almost 3 foot of snow and no power since last weds I just got it back on Mon and my cable today. As far as coil spring removal, I notice the driver side seems easier to remove than the passenger side. Dont know why but the springs that were "close" to the GTO springs that i aquired may be in finally. Here are other close to the GTO spring The only difference from these 4 springs are spring rate and load rate. Just check how tall they are and if they are 10 inches like our GTO spring they should fit and give a different ride. To soft and they will sag to stiff and they may be to high. Im sure you all can tell which are the GTO springs---Danfigg

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post #8 of 22 (permalink) Old 03-04-2010, 01:55 PM Thread Starter
 
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left side done

I got the left side in and it raised the car from 25 3/4 inches from the ground to the lip that every one loves to cut off or "roll" and now it is 28 inches from the gorund to the lower quarter. I like it at 28 inches it might be a little high for others but now I can put my slicks under it and not have them rub. I used 2, 2 inch muffler clamps to help remove the GTO springs keeping them compressed. Removed the shocks and they popped out. Know getting the BMW springs in was a little harder. I had to remove the sway bar link and had to use the spring compressor. The right side is next and then a test drive. I am 5'10" and weight 235 so that 25 3/4 inches changes when I get in the car. I think I am going with some larger tires also probably 255/40/ 17 to take up some space in the wheel well 1477 lbs. max load
51 psi max inflation
8/32" tread depth
25lbs. tire weight
8.5-10" rim width range
9" measured rim width
10.2" section width
NA
25" over all diameter
830 rev per mile Click image for larger version

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post #9 of 22 (permalink) Old 03-04-2010, 03:50 PM
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The sure looks like it sits up awfully high. Lets see a full side shot.

If the car sits that high up as the picture indicates you better make sure you compensate the front end.

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post #10 of 22 (permalink) Old 03-04-2010, 04:15 PM Thread Starter
 
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all done

Ok both sides are done and I took it for a ride. It sits a little high but I like where it sits. The most important thing is that it rides smooth. It is not as harsh as I thought it would be and THE WHEEL HOPE IS GONE. Here are all the total measurements from before and after from the ground to the lower quarter ---- GTO springs Driver side 25 3/4 inches passenger side 26 1/4------ BMW X3 springs-Driver side 28 inches passenger side 27 1/2 inches. So now when I get in the car both side should be level. I dont know the measurements in mm. So any and all thought can begin on this low buck swap----danfigg Click image for larger version

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