Author Topic: Stock springs  (Read 4838 times)

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Offline Sirdeuce

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Stock springs
« on: September 30, 2010, 12:37:01 PM »
Let me bounce this of the guys. Probably targetted more at Bryan since he has the most track time in an MR2.  Stock springs, cut to drop the car just slightly, then move the perches down. I'm thinking cutting the springs just enough to lower the car by 1 inch. Be just enough to up the spring rate slightly. Cut the springperchers off in the lathe and weld them back 1 1/2 " lower than stock, 1" in the rear. Cut the bumpstops to 1" to allow more travel. 2nd scenario, just cut the spring perches and weld them at a height we can agree on. We have a few sets of springs we can play with so we don't have to get nervous about screwing things up. Or maybe the springs fron a later model MR2 will fit? Got any spares Bryan?
"I slept with faith and found a corpse in my arms on wakening; I drank and danced all night with doubt and found her a virgin in the morning."

Offline BigMike

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Re: Stock springs
« Reply #1 on: September 30, 2010, 04:24:56 PM »
I like both ideas a lot (lower the struts and increasing the spring rate)

I hear lowering the MK1 2" or more removes most adjustment from the suspension.

But now with the crash bolts I've got, maybe this doesn't apply anymore?
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Offline Sirdeuce

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Re: Stock springs
« Reply #2 on: September 30, 2010, 08:01:00 PM »
I have those roll center plates for you to copy too! That'll restore the adjustment deficit of lowering the car too much. The bump steer produced from excessive angles in the rear tie rods and front tie rod ends is another story though. Techno Toy Tuning has a sleeve that can be installed in the front to install the tie rod ends from the bottom of the steering knuckle. Requires a little work to get it done. Have to drill out the taper, install the sleeve, maybe weld it in place and ream it. I think it compensates for up to a  2 1/2" drop. The rear requires an extention of the rod end stud. I believe the toe goes out on a hard compression of the suspension if the car is dropped without addressing the tie rod ends. So much to ply with!
"I slept with faith and found a corpse in my arms on wakening; I drank and danced all night with doubt and found her a virgin in the morning."

Offline BryanH

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Re: Stock springs
« Reply #3 on: September 30, 2010, 08:29:45 PM »
I have no clue here... :)  Stock springs are no longer stock when they're cut and have spring perches moved around! 

All I know is the car doesn't have a lot of compresssion travel when lowered, and that is why some people run modified shock lengths.  But maybe that's where you're going with the spring perch modification.  That stuff goes over my head for some reason.

Offline Sirdeuce

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Re: Stock springs
« Reply #4 on: September 30, 2010, 10:29:30 PM »
I would very much like to find a shorter shock, but I can't find a dimensional listing. Any clues on that?
"I slept with faith and found a corpse in my arms on wakening; I drank and danced all night with doubt and found her a virgin in the morning."

Offline BigMike

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Re: Stock springs
« Reply #5 on: October 01, 2010, 11:08:43 AM »
Are the AE86 struts the same as AW11?
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Offline Sirdeuce

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Re: Stock springs
« Reply #6 on: October 01, 2010, 08:23:45 PM »
Not sure, but the front shocks would have to fit the rear of the AW11,
"I slept with faith and found a corpse in my arms on wakening; I drank and danced all night with doubt and found her a virgin in the morning."

Offline BigMike

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Re: Stock springs
« Reply #7 on: October 01, 2010, 10:41:13 PM »
Here are some Monroe part numbers I looked up that use replaceable strut cartridges:

ApplicationP/N
1987 MR272880
1992 MR273204
1988 Celica73238
1987 AE8673214
1987 FX1673224
1983-86 Tercel72867
1987-90 Tercel72876
1981-84 Starlet72837

Heavier Weight Toyota's
1979 Corona73951
1980-82 Corona73963
1978-80 Cressida73963
1981-82 Cressida73991
1983-92 Cressida73214
1983-86 Camry73238 (13.50in depth)
73210 (13.88in)
1979-81 Supra73951
1982-86 Supra73935

Next, check this out: http://www.monroe.com/catalog/documents/08_MountingLengthSheet.pdf

That is a complete list with sizes. So just cross-reference and see what is going on (I'm too tired to do it right now). Check the lengths on the Camry, Supra, Cressida, etcetera struts and let's see if we can use them

For instance, the MK1 MR2 strut (72880, see page 18) is 14.5" long, 15.75" compressed & 22.125 extended, with 6.375" travel

I understand this doesn't tell us everything, but hell, it's a start at least.........

BigMike
-/_/___/__________\___\_\-
|______________________|
|-------\___________/------|
```````````````````````       
R135
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  246

     My 1987 Supercharged 4A-powered 6-speed MR2

Offline Sirdeuce

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Re: Stock springs
« Reply #8 on: October 02, 2010, 10:59:06 AM »
The specs I need are body lengths and diameters. But the compressd and extended lengths are quite helpfull in giving the travel lengths. 
"I slept with faith and found a corpse in my arms on wakening; I drank and danced all night with doubt and found her a virgin in the morning."

Offline kdogae86

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Re: Stock springs
« Reply #9 on: December 02, 2010, 09:34:35 PM »
havent forgotten bout the stock specks bill.will post tomorrow.have had them sitting at home just forgot to post them.

Offline Sirdeuce

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Re: Stock springs
« Reply #10 on: December 03, 2010, 10:42:11 PM »
Cool, just something to kick around.
"I slept with faith and found a corpse in my arms on wakening; I drank and danced all night with doubt and found her a virgin in the morning."

Offline kdogae86

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Re: Stock springs
« Reply #11 on: December 09, 2010, 05:36:20 PM »
87-89  alignment specs in tenths of deg
camber -.3 to .8
cross camber -.5 to .5

caster 4.6 to 5.6
cross caster -.5 to .5

toe 0.0 to 0.08
cross toe 0.0 to 0.16

rear camber -1.4 to -.4
cross rear camber unknown but probly in the .5 to -.5 range
rear toe .16 to .24
total toe .32 to .48