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Old 06-28-2016, 04:45 PM
  #16  
gmgracing
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Mikey,

My specialty is product development. My educational background is both engineering and design. The following response is not marketing BS, but rather an explanation on how the industry works. I understand it is not perfect, given I am writing as the vendor here, but I hope it will suffice.

Eibach’s business model is that the product line is expansive in breadth (springs and swaybars for everyone!), but not in depth. They can only spend so much on development of a single product until it is no longer cost effective. A specialist like us is the opposite, we are narrow in our model focus, but our depth of understanding of that specific model is much deeper. However, we don’t want to buy a giant spring machine if we only want to make a couple spring types. If Eibach gets to sell more springs without investing their own dime into additional research, and if we get to produce a specialized spring without buying manufacturing equipment, it’s a win-win for both of us.

I have dozens of examples, but one stands out. I developed a very specific piston design that was perfect for a very specific need. It called for plenty of coatings, an offset dish, and a unique ring package. I contracted the actual production and QC to Mahle Motorsports. The end result was a very specialized piston that cost 2.5x more than the normal mass-produced Mahle Motorsport piston set did for the same application. However, they sold like hot cakes.

A rough list of factors to consider:
- Extra development investment performed by the specialist and supplier (but paid for by the specialist)
- Private label costs
- Smaller production batches
- Potentially different raw material/feature costs

I believe that what people get worried about is that the supplier is simply peeling off the manufacturer’s sticker and slapping their own overtop. It is true that there are a number of unscrupulous aftermarket companies that really do that (I have seen it on this message board more than once). Those types typically shout loud that they are a specialist, but ultimately they do not last for very long. To put it bluntly, they talk the talk, but don’t walk the walk.

Hope that helps,
Andrew Adams
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Old 06-28-2016, 11:10 PM
  #17  
bigrpowr
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Originally Posted by gmgracing
Mikey,

My specialty is product development. My educational background is both engineering and design. The following response is not marketing BS, but rather an explanation on how the industry works. I understand it is not perfect, given I am writing as the vendor here, but I hope it will suffice.

Eibach’s business model is that the product line is expansive in breadth (springs and swaybars for everyone!), but not in depth. They can only spend so much on development of a single product until it is no longer cost effective. A specialist like us is the opposite, we are narrow in our model focus, but our depth of understanding of that specific model is much deeper. However, we don’t want to buy a giant spring machine if we only want to make a couple spring types. If Eibach gets to sell more springs without investing their own dime into additional research, and if we get to produce a specialized spring without buying manufacturing equipment, it’s a win-win for both of us.

I have dozens of examples, but one stands out. I developed a very specific piston design that was perfect for a very specific need. It called for plenty of coatings, an offset dish, and a unique ring package. I contracted the actual production and QC to Mahle Motorsports. The end result was a very specialized piston that cost 2.5x more than the normal mass-produced Mahle Motorsport piston set did for the same application. However, they sold like hot cakes.

A rough list of factors to consider:
- Extra development investment performed by the specialist and supplier (but paid for by the specialist)
- Private label costs
- Smaller production batches
- Potentially different raw material/feature costs

I believe that what people get worried about is that the supplier is simply peeling off the manufacturer’s sticker and slapping their own overtop. It is true that there are a number of unscrupulous aftermarket companies that really do that (I have seen it on this message board more than once). Those types typically shout loud that they are a specialist, but ultimately they do not last for very long. To put it bluntly, they talk the talk, but don’t walk the walk.

Hope that helps,
Andrew Adams

AMEN . all it takes is anybody checking spring rate on both, and i'd be willing to bet they arent the same.
Old 06-29-2016, 01:34 AM
  #18  
El Dario Loco
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How are the Porsche GTS springs compared to the GMG ones? I know that Tom from TPC recommends them in combination with the DSC box.
Old 06-29-2016, 12:50 PM
  #19  
jcpca356
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I have a set of new H&R (installed and then taken off) springs if you're interested
Old 06-29-2016, 03:22 PM
  #20  
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Originally Posted by El Dario Loco
How are the Porsche GTS springs compared to the GMG ones? I know that Tom from TPC recommends them in combination with the DSC box.
I saw that too, I'd be curious as well.
Cjh
Old 07-04-2016, 03:51 PM
  #21  
BOOSTED TTS
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Techart's will do the job.

Manuel
Old 07-06-2016, 03:55 PM
  #22  
DocHW
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Who of you also replaced the rear toe links to properly set up rear toe with the lowering springs?
Old 07-06-2016, 03:57 PM
  #23  
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Originally Posted by DocHW
Who of you also replaced the rear toe links to properly set up rear toe with the lowering springs?
I did, with RSS and Porsche Motorsports.

Manuel
Old 07-06-2016, 05:05 PM
  #24  
nzskater
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I've had no issue dialling in the rear toe I wanted with the OEM links? Keen to understand why they need to be changed.
Old 07-06-2016, 05:29 PM
  #25  
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I am, im replacing mine with Torque Solutions rear toes links
Old 07-06-2016, 10:23 PM
  #26  
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Originally Posted by nzskater
I've had no issue dialling in the rear toe I wanted with the OEM links? Keen to understand why they need to be changed.
If you set a lot of rear camber you will wear the inner rear tires, AM toe links have more adjustability than stock links in correcting geometry.
Old 07-07-2016, 02:52 AM
  #27  
DocHW
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This is from the Tarrett site:
Don't know if this also applies to the usual 20mm drop with springs on the TT

Restore proper suspension geometry with this adjustable lower rear control arm. The factory control arm can’t compensate enough when lowering your 996/997, Cayman or Boxster, leaving you stuck with as much as ½” of toe in. The result is poor handling and rapid tire wear. This kit will provide the additional adjustment needed.
Old 07-07-2016, 04:48 PM
  #28  
atcbi5
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Originally Posted by gmgracing
Mikey,

My specialty is product development. My educational background is both engineering and design. The following response is not marketing BS, but rather an explanation on how the industry works. I understand it is not perfect, given I am writing as the vendor here, but I hope it will suffice.

Eibach’s business model is that the product line is expansive in breadth (springs and swaybars for everyone!), but not in depth. They can only spend so much on development of a single product until it is no longer cost effective. A specialist like us is the opposite, we are narrow in our model focus, but our depth of understanding of that specific model is much deeper. However, we don’t want to buy a giant spring machine if we only want to make a couple spring types. If Eibach gets to sell more springs without investing their own dime into additional research, and if we get to produce a specialized spring without buying manufacturing equipment, it’s a win-win for both of us.

I have dozens of examples, but one stands out. I developed a very specific piston design that was perfect for a very specific need. It called for plenty of coatings, an offset dish, and a unique ring package. I contracted the actual production and QC to Mahle Motorsports. The end result was a very specialized piston that cost 2.5x more than the normal mass-produced Mahle Motorsport piston set did for the same application. However, they sold like hot cakes.

A rough list of factors to consider:
- Extra development investment performed by the specialist and supplier (but paid for by the specialist)
- Private label costs
- Smaller production batches
- Potentially different raw material/feature costs

I believe that what people get worried about is that the supplier is simply peeling off the manufacturer’s sticker and slapping their own overtop. It is true that there are a number of unscrupulous aftermarket companies that really do that (I have seen it on this message board more than once). Those types typically shout loud that they are a specialist, but ultimately they do not last for very long. To put it bluntly, they talk the talk, but don’t walk the walk.

Hope that helps,
Andrew Adams
Cool, I propose the following; 1. send me a set of your springs. 2. I will remove my Eibachs 3. Instal the GMG type developed. In return, I will tell you if I feel any difference.

Last edited by atcbi5; 07-07-2016 at 06:23 PM.
Old 07-09-2016, 02:09 PM
  #29  
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^^^subscribed. When I was looking for springs, I called both Eibach and GMG. Only Eibach provided me with spring rates. GMG wouldn't. Not unreasonable for a consumer to know the specs of what they are purchasing. Especially when the product is close to twice the price.

Nice marketing write up from GMG. But unfortunately tells the educated consumer nothing.
Old 07-09-2016, 03:18 PM
  #30  
quick968
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Originally Posted by Jako
Especially when the product is close to twice the price.

Nice marketing write up from GMG. But unfortunately tells the educated consumer nothing.
This was exactly my thinking. When I club raced my 968CS I was using the Koni 3012's in the rear and 2817's up front. Jason at Paragon Products and I played nearly endless spring rate games with the Hypercoils, different rates for different tracks. Porsche Motorsports publishes their spring rates. Same goes for KW, Moton's. JRZ's, Ohlins, etc. They all will sell you any rate you want. The notion that GMG would keep their custom Eibach spring rates "secret" is laughable when it can be checked so easily. The rates by definition need to be VERY close to the off the shelf Eibach, or H&R, or whoever as the "mission" definition is essentially identical. The springs need to maintain a streetable ride height, doing spirited street driving, with a large cross section of cars at nearly identical gross weights, using the stock strut valving with or without a DSC box. Same, or nearly the same spring steel alloys. This by definition dictates a fairly narrow spring rate range or they simply won't work properly with the strut damping. The only variable is are they straight rate or progressive, not like they are full coilovers with helper springs and main coils. So unless your last name is Pobst or something similar, you won't see any real practical differences in day to day fun or even DE type driving. For the extra money between the Eibach vs GMG springs, I bought a nice set of GT2 front brake cooling ducts from Suncoast which come in handy here in the AZ heat.

CHeers
Mikey


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