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Old 04-21-2010, 04:01 PM   #1
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Cool For all you Megan Racing Coilover Users... Read this

This is a side by side comparison of the differences in just changing springs.... Swift Springs ARE basically the best springs on the market and this is why just upgrading the springs will REALLY help those MR coilovers....

Although this is for mini's they use the same diameter shock tubes....

In the end....

MR Coilver Springs are:
ID = 62mm
height =
180mm front
200mm rear
8/6 for street coilover series
12/10 for track coilover series

Replacement's use ID 65mm (Confirmation from Swift themselves) and retain same specs, but from all the research I have done, S13's weights are lighter, so I would go 10/8's...

MINI COOPER :: North American Motoring - Swift Springs dynoed

Quote:
Well I posted on another thread that I would in detail explain the substantial difference between Swift springs, and all other springs. So here it is.

I really don't know where to start with this but Ill just jump into it.
I have tested out many different types of suspension systems. One of the biggest factors in the entire suspension system is of course the Spring.

There are a few factors to look into when it comes to springs.
-stroke
-accuracy of spring rate
-weight

Now I'm sure most of you are aware of the spring binding problem with megan and the BC coilover system. Well that is completely a spring issue, most companies totally cheap out on the springs of the suspension systems especially the more inexpensive ones.

I have dynoed pretty much every springs I can get my hands on. So I can show you the differences of them. ......
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Old 04-21-2010, 04:15 PM   #2
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cool info, thanks
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Old 04-21-2010, 04:16 PM   #3
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Lol took me 2 years to find the right ID.... going to be ordering 10/8's next month and slap them on....
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Old 04-21-2010, 04:30 PM   #4
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you have to contact megan first and see if they are dampened correctly for a 12 springs. on average a spring difference of 2 is ok and no more. so if it's 8 then 6 or 10 but not 12.
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Old 04-21-2010, 04:32 PM   #5
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My front springs are Stance.
They are a wrong diamater; 65mm I believe; but they were cheap.

However, I have never heard of spring binding issues with Megan coilovers.
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Old 04-21-2010, 04:43 PM   #6
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Anything that approachs binding will reduce stroke.... Stroke is super important when in any surface. Because swift reduces the amount of coils but still retain linear spring rates, they can increase stroke without changing length of spring or spring rates....

Trust me megan coils suck.... ever lift a car with megans of them and they have no droop or go up a curb and you go 3 wheeling, its because there is no stroke....

All megans can go +/- 2kg/mm as per their site.....

Hence I am going with 10/8 or maybe 11/9 on MR Tracks which shipped 12/10.....

Also way less unsprung weight for all the springs so it rebounds and compresses during weight transitions much faster. It makes wheels stick to the ground longer....
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Old 04-21-2010, 05:39 PM   #7
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springs?

Where can we buy these cheap???




Help some people out from the swift manual.. PART #'s




180 millimeters = 7.08661417 inch
200 millimeters = 7.87401575 inch
7" LENGTH
Z65-178-080 8.0 4 48 93 3.7 117 4.6 936 2,064 0.99 2.18
Z65-178-090 9.0 5 04 89 3.5 117 4.6 1,049 2,314 1.05 2.32
Z65-178-100 10.0 5 60 86 3.4 116 4.6 1,157 2,551 1.10 2.43
8" LENGTH
Z65-203-080 8.0 4 48 107 4.2 128 5.0 1,025 2,259 1.31 2.89
Z65-203-090 9.0 5 04 102 4.0 128 5.0 1,152 2,540 1.35 2.98
Z65-203-100 10.0 5 60 100 3.9 125 4.9 1,250 2,756 1.47 3.24
Z65-203-110 11.0 6 16 92 3.6 126 5.0 1,389 3,063 1.48 3.26
Z65-203-120 12.0 6 72 92 3.6 125 4.9 1,496 3,299 1.51 3.33

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Old 04-21-2010, 07:27 PM   #8
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The best place I have found is evasivemotorsports.com. 360+ cali tax + shipping....
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Old 04-21-2010, 07:37 PM   #9
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Quote:
Originally Posted by Matej View Post
My front springs are Stance.
They are a wrong diamater; 65mm I believe; but they were cheap.

However, I have never heard of spring binding issues with Megan coilovers.
have stances front and rear, with shorter springs in the front. indeed they are 65 mm. ride is great, i have the track versions.
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Old 04-22-2010, 10:42 AM   #10
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Why Swift springs?

Why not go Hypercoil? Cheaper and still great quality stuff.
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Old 04-22-2010, 10:57 AM   #11
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Old 04-22-2010, 11:00 AM   #12
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Quote:
Originally Posted by !Zar! View Post
Why Swift springs?

Why not go Hypercoil? Cheaper and still great quality stuff.
Because Swift is JDM and Hypercoil isn't?

Much like how Eibach isn't JDM, thus no street cred.
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Old 04-22-2010, 11:26 AM   #13
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Because Swift is JDM and Hypercoil isn't?

Much like how Eibach isn't JDM, thus no street cred.

lol!
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Old 04-22-2010, 11:26 AM   #14
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Its funny that you mention that megan racing told me the same thing. Get swift springs for best suspension set-up
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Old 04-22-2010, 11:29 AM   #15
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Quote:
Originally Posted by !Zar! View Post
Why Swift springs?

Why not go Hypercoil? Cheaper and still great quality stuff.
Did you read the article?

Swift springs were off by 5lbs.

Hypercoils were off by 15lbs. (Yes I know that's not a lot, but still)

Swift springs have way less coils, so more suspension stroke.

You get what you pay for. Swift Springs are the best you can buy, therefore they are more expensive.
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Old 04-22-2010, 12:15 PM   #16
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I mean seriously... do people even know the differences on the street.... Like the premie rant said... paraphrase from CodyAce...

Roll in to a meet with his rocket ship and another S14 guy told him nice car. Then the kid asked Cody, what suspension you running, Cody said I built it with Koni's and GC's... The kid said why not put in some nice suspension and look into HKS....

Really.... General Pop wouldn't know the difference.... But its just I thought it was a great article and independent tested via grassroots....

I mean like said, Track vs. General Pop.... I don't dislike megans, but their suspension stroke sucks cause even at 12/10 the suspension really doesn't move and if you look at FEED Rx7, they are using 14/14 and still no complaints about suspension stroke and it settled really nice in the videos I watch of it.... Personally I doubt the shocks are blown and I am sure they still move so it lead me to believe something is wrong with the spring...

Lone and Behold this Mini thread which I thought was AWESOME.... and it is....
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Old 04-22-2010, 12:19 PM   #17
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Also if anyone has any doubts, here is exactly why they are better than others.

Swift Springs USA

Videos of on car suspension stroke tests, not just a dyno.......

Quote:
H5S.TW
Motorsport's most advanced spring material


Swift made a name for itself on the tracks of Asia, Europe, and U.S. by defying all accepted concepts and speculations about the future, if any, in coil spring science.
When many other company were looking at expensive and brittle titanium composites to create the next evolution of springs, Swift was looking at reinventing the entire science of coil spring dynamics. Swift saw that most others are using the old regular silicone chrome material, which was not strong enough. It used a heat tempering method that damaged the strength of the material that requiring more coils, in turn, more weight.
The material was also suffering from a short life span. With springs like this leading the industries, Swift saw room for improvement.

Swift's R & D team created material, called H5S.TW, which is stronger then regular silicone chrome material. Because of this material, we could make the spring wire thinner, and could wind the springs with fewer coils, which greatly decreased weight while dramatically increasing available stroke.

Barrel Design
Isn't the barrel design heavier? Not on Swift. Still one of the lightest!!

All of Swift Standard 10” and longer Coilover springs are barrel design; the design is to solve all spring bowing problems. With bowing springs, you can expect spring rate inconsistency, and rubbing against shock body that would lead to damages on the shock adjusting perch thread. (Except Swift Drag racing springs)

One approach would be to increase the number of coils on the springs. With more coils on the spring, you will experience less bowing motion. This is the easy and cheaper method to solve the issue. But the downside of this method is a decrease in suspension stroke, increase in un-sprung mass, and will effect the overall movement of other suspension components.

Unlike others, Swift designed barrel springs with one common rule, which is all the barrel springs design have a maximum of 4” OD. Because most other manufacture do not design their barrel springs with this rule. Most of their barrel springs outside diameter will differ from one rate to another. This creates a hard time for racers to test and see which rates will fit and which rate does not. A heavier rate spring tends to interfere with the suspension A-arm or other suspension components.

Generally speaking, the barrel designed springs tend to be heavier in weight than straight shape springs, but Swift coil springs will never have this problem because of our world leading coiling technology .
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Old 04-22-2010, 04:09 PM   #18
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Interesting. I though the test/talk was only towards Megan vs Swift.

But as for the price, I don't think 15lbs is enough for most weekend warriors to notice. So Hypercoil is still for me... I would like to know how consistent each companies springs are.
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Old 04-22-2010, 04:46 PM   #19
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Sorry Mel, gotta read the whole thread and I know its long but good info. But by far, swift was able to have the most stroke in the spring, meaning the ability for it to compress the furthest distance because of the shape of the design. Also was the most consistent throughout the stroke....

I think hypercoils are nice too, I LOVE their hydaulic perches too, but springs, I gotta give it to Swift...

One thing I gotta say, springs are like Monitors or LCD's buy once use on different computers, coils buy it and you can use it on all sorts of Dampner... Springs for megans using 65mm, but they fit most of the stances gr+ gr pros, PBMs, I think greddy's, and couple of others too...

So why not spend it.... I like PBM's cause they sell the dampner to swap out when blown.... No rebuild, just through the blown away ahahah...

Also I would love helper springs on the rear... Keep the car more planted... but eh... those are $$$
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Old 04-22-2010, 05:55 PM   #20
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cool thread, i will def be buying the SWIFT springs for my megan tracks after reading this!


ps do i get 60mm or 65mm? im not too bright on this shit.
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Old 04-22-2010, 05:56 PM   #21
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Good info. I've known for some time that Swift springs were good. Also, SPLparts sells them in 60 and 65mm ID in various lengths and spring rates for $170 a pair
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Old 04-22-2010, 06:35 PM   #22
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That's good and dandy that the Swift springs will give you more suspension travel, but really, how many 240s will benefit from them?

Most everyone's car on this forum are like 2" from the ground.

If the Sprint springs will give you 4" of travel versus having only 3" of travel with the stock Stance springs or whatever, you're still hitting the ground with your frame first, or your tires hitting the chassis somewhere.

So yeah, while they are lighter, which is a plus there already since springs can be part of the unsprung weight, are they going to be $170 for a pair better?

For some people that's not an issue, but for some others, that $170 can be spent on something else.

Just saying.
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Old 04-22-2010, 07:48 PM   #23
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Quote:
Originally Posted by PoorMans180SX View Post
Did you read the article?

Swift springs were off by 5lbs.

Hypercoils were off by 15lbs. (Yes I know that's not a lot, but still)

Swift springs have way less coils, so more suspension stroke.

You get what you pay for. Swift Springs are the best you can buy, therefore they are more expensive.
So ironic that you guys are spending nearly $400 on springs for a set of $850ish pair of dampers to fix a problem that *ANY* coil spring will experience when being compressed. BTW - Hypercoils and Eibachs are on $1 mil+ racecars, they are plenty good enough for an S13 on some super cheap Chinese made coilovers.

What you guys need are a set of thrust bearings somewhere between your spherical bearing on the camber plate/shock mount and the lower spring seat to allow the spring to naturally wind and unwind as they compress(all coil springs in the world do this due to their geometry). It does make a difference.

I've got some Vorshlag upper spring seats with thrust bearings up front and torrington bearings in the rear of my setup. Springs rotate freely and compress easily.
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Old 04-23-2010, 12:47 AM   #24
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You use 65mm.... Read the thread first...

@Def, I am thinking about those hydraulic perches from hyper coils, but I will look at thrust bearings and torringtons...

But seriously, I think springs will help and will make a difference.... But its worth a try, if not I can always reuse them some where else....

$170 a pair isn't too bad.... But keeping in mind about roll center and ride height is huge too...
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Old 04-23-2010, 03:47 AM   #25
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I 3 wheel with my Megan Tracks all the time, and that is with an open diff. Sucks. Swift springs huh? Cool. Something to consider.
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Old 04-23-2010, 07:17 AM   #26
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Quote:
Originally Posted by slider2828 View Post
You use 65mm.... Read the thread first...

@Def, I am thinking about those hydraulic perches from hyper coils, but I will look at thrust bearings and torringtons...

But seriously, I think springs will help and will make a difference.... But its worth a try, if not I can always reuse them some where else....

$170 a pair isn't too bad.... But keeping in mind about roll center and ride height is huge too...
You don't have to worry about roll center with Def, nor his spring/damper setup.

He has the 8611/8610 setup, along with his custom roll center adjusting FLCAs. His setup is money.
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Old 04-23-2010, 08:14 AM   #27
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Quote:
Originally Posted by slider2828 View Post
You use 65mm.... Read the thread first...

@Def, I am thinking about those hydraulic perches from hyper coils, but I will look at thrust bearings and torringtons...

But seriously, I think springs will help and will make a difference.... But its worth a try, if not I can always reuse them some where else....

$170 a pair isn't too bad.... But keeping in mind about roll center and ride height is huge too...
You've got to be kidding me at putting hydraulic spring perches on a set of Megans!!!

Those things are about $700 for 4, which is how much your whole set of coilovers cost. Plus they need to rebuilt every 10-20 HOURS of use. That's right, you went to the grocery store and back, you just used up 1 hour of your rebuild window. They are absolutely NOT for street cars. Torrington bearings are hard enough to keep clean with flushing them out every few thousand miles - not hard, but it is maintenance to keep them working well.

Let me save you some trouble since you seem to actually want a decent suspension, save up for something that's worth a crap and get some GOOD dampers on the car and just sell your Megans. Even something like a Koni 8610 front/Koni yellow or Bilstein rear wouldn't be much more expensive than what you're talking about donig and absolutely blow a set of "modded" Megans away.

Please, spend some time at Nissan Road Racing Forums - Powered by vBulletin if you really want to learn about suspension that doesn't suck. Trust me, Megans are absolute junk dampers - there is just no other way to describe them.
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Old 04-23-2010, 08:16 AM   #28
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I was just thinking about this last night Def.

Torrington bearings.... how hard are they to clean and keep clean?
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Old 04-23-2010, 08:32 AM   #29
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They aren't that bad. I just drop my spring perch every couple thousand miles and give them a good spray with WD-40. Seems to get most of the grit out. Then re-oil with a little bit of light machine oil(like All-in-One oil).

My car is not a daily driver though, so it's not a huge issue for me.

If I put over say 5k miles on the car a year I'd probably just get another set of Vorshlag spring hats with a thrust bearing integrated into them that's sealed.



That's the spring hats on the bottom, but I have the thinner "race" bearing to reduce the stack height.
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Old 04-23-2010, 09:19 AM   #30
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Yeah I do daily drive my car... as a matter of fact, it's going to pull double duty as a DD and track car, so I guess I will look into the "Vorshlag spring hats with a thrust bearing integrated into them that's sealed"

What do you think about these though Def?

Quote:
Originally Posted by SPLparts.com
Swift spring thrust washers use a composite washer to allow the spring to freely wind/un-wind as the spring is compressed, reducing noise and improving performance. The washers are placed between the spring and the upper and lower spring perch. Order the appropriate ID to match the springs. Consists of 4 metal and 4 composite washers, enough to fit 1 pair (ie.2) of springs.

I'm guessing the metal washers sandwich the composite washer, and the composite washer is supposed to be teflon lined or made out of teflon like material or something, and thus is naturally slippery?

I'm just guessing, but if these work, they might be a better solution to street cars than the torringtons.
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