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| Registered Join Date: May 2009 Location: Around Boston 
					Posts: 2,050
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				Eibach Valve Springs
			 
			Hi there. Anybody has used this set up? They have 2 kinds, Porsche 911 Air Cooled (from eibach website) 20701.212 (Set of 12) Dual Spring 31.6 mm 17.6 mm 55 lbs @ 36.5 mm 183 lbs @ 25.5 mm 11 mm 20.5 mm 20444.212 (Set of 12) High Lift Spring 31.75 mm 17.3 mm 90 lbs @ 36 mm 277 lbs @ 23.3 mm 12.7 mm considering it for my 2.7 heads with solex cams. Thank you. | ||
|  01-19-2011, 07:00 PM | 
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| Registered Join Date: Oct 1999 Location: Marietta, GA 
					Posts: 809
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			I would go with the heavier set (20444.212) I am running springs that have a seat pressure of 130# with Solex cams. About 300" open pressure. I have revved the engine to 8300 rpm without float. If you are running on the street the 90# seat will be fine.
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|  01-21-2011, 04:34 AM | 
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| Try not, Do or Do not | 
			I just bought two sets and I will test them and get back to you.  On paper both sets looks pretty good. 
				__________________ Henry Schmidt SUPERTEC PERFORMANCE Ph: 760-728-3062 Email: supertec1@earthlink.net | ||
|  01-21-2011, 04:33 PM | 
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| Registered Join Date: Jun 2003 Location: Camarillo, Ca. 
					Posts: 2,418
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Hi Neil, as a reference, with the spring # you have you can run a DC90 profile to approx 8700rpm with stock adj rockers/ Ti retainers. You can free up some Hp by setting your springs to a more moderate rate such as 80-90 lbs @ the seat.
		 
				__________________ Aaron.  F.S. 1965 Solex engine w carbs/cleaner Burnham Performance https://www.instagram.com/burnhamperformance/ | ||
|  01-21-2011, 05:26 PM | 
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| ALEX P | 
			Interested in this one as they seem very reasonably priced. I've seen the Eibach springs for sale on Ebay but where else sells them? Henry, please can you tell us what retainers are you testing them with and how long do you you expect to test them over? | ||
|  01-23-2011, 01:16 AM | 
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| Registered Join Date: Oct 1999 Location: Marietta, GA 
					Posts: 809
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			Aaron, What would you recommend with the DC70 cam and steel retainers? Thanks, neil | ||
|  01-23-2011, 05:19 AM | 
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| Registered Join Date: Jun 2003 Location: Camarillo, Ca. 
					Posts: 2,418
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			Hi Neil, I ran 110 lbs at the seat with the DC90 which IIRC has the same exhaust profile as the DC70. This was with a Ti retainer. If you are running John"s springs and are shifting at 8200rpm 110-120 lbs is acceptable. John may be a bit more conservative and have you run 120-130 lbs. Always double check with your cam guy prior to setting spring height. Some Empirical data for you; We had a missed shift and broke an exhaust rocker @ 9300-9400 rpm. No visual damage to the valve but it was replaced anyway. This was with the settings in the above post. 
				__________________ Aaron.  F.S. 1965 Solex engine w carbs/cleaner Burnham Performance https://www.instagram.com/burnhamperformance/ | ||
|  01-24-2011, 07:43 AM | 
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| Registered Join Date: May 2009 Location: Around Boston 
					Posts: 2,050
				 |   Here they are. Don't really have a way to test them. I hope I can have them working in the spring. Going in 2.7 heads(with the forged retainers) with webers and DC-30 cams. If anybody knows something that I should be aware, please let me know. Believe me I'm a rookie. And for the price just looked right. Thank you. | ||
|  02-04-2011, 04:24 AM | 
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| Registered | 
			Just completed a rebuild with the DC30 cams.   Love them! Chris 73 911 E | ||
|  02-11-2011, 12:17 PM | 
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| Registered Join Date: Oct 2009 Location: France 
					Posts: 109
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			This springs can be used with original steel valve spring retainers and seats without modification ?
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|  02-13-2011, 08:08 AM | 
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| Registered Join Date: Aug 2010 Location: NY & UK 
					Posts: 203
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			Would these work ok in my 3.0 SC with DC60 Cams?
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|  02-17-2011, 10:44 AM | 
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| yep, im slow in the head | 
			i drive by the eibach factory just about every time i leave my house, i wonder if i can stop in and pick up some springs in person. my motor over haul is asking for some better valve springs.
		 
				__________________ 1978 911sc Targa - CNC plasma/router cut parts, tig welding, sheet metal work, VAG-COM, LM-1. let me know if u need something | ||
|  02-17-2011, 10:51 AM | 
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| Registered Join Date: May 2009 Location: Around Boston 
					Posts: 2,050
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			So........ I'm just a driveway warrior.  Any attempts are at your own risk.. LOL I felt after talking to some builders that this were a good deal. Eibach is known for making springs. I paid 179 bucks for the set and this are the stiffer ones that can work on turbo and high RPM applications. I think they are a ridiculous deal for the price. From talking to Eibach they would work on any air-cooled 911. Just checked how much power you are adding. The only problem is that it could stretch your timing belt after soooo many years of use. How do you know that and when it's going to happen??? I don't know and at that point I'm sure I will be tinkering in a different car. Ask the pros but until 1977 ( 2.7 heads) valve retainers are forged so they are better. After that the retainers are cast so they are a little weaker. Again ask the pros for the right answer. If it makes a difference in my spirited street driving i can't really tell. I hope this helps and doesn't confuse anybody. | ||
|  02-17-2011, 12:30 PM | 
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| Registered Join Date: May 2009 Location: Around Boston 
					Posts: 2,050
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			And they are made in the USA.  God bless america!!!
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|  02-17-2011, 12:31 PM | 
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| Registered Join Date: Aug 2010 Location: NY & UK 
					Posts: 203
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			so how long have they been in motor for and is everything going just fine?
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|  02-17-2011, 12:39 PM | 
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| Registered Join Date: May 2009 Location: Around Boston 
					Posts: 2,050
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			Stevo. I just drop them at the machine shop. I will tell you in the spring how they perform. Talking to my machinist I should be able to go 7200 RPM no problem. There is a previous post by Nelica (I think) that is using them in a race app. | ||
|  02-17-2011, 12:47 PM | 
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| Registered Join Date: Aug 2010 Location: NY & UK 
					Posts: 203
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			Thanks
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|  02-17-2011, 12:52 PM | 
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| Registered Join Date: Oct 1999 Location: Marietta, GA 
					Posts: 809
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			I am not currently using these springs, but thinking about it.
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|  02-17-2011, 01:00 PM | 
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| Registered Join Date: Aug 2010 Location: NY & UK 
					Posts: 203
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			I think I will just pull the trigger on these, I was a bit skeptical as not a lot are using them, but I have just done some research online and I can't find any issues with them and they do MANY applications. Let's face it Eibach have been around for many years and are renowned for their Springs whether Industrial or Automobile... sure they will be up to the job.
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|  02-17-2011, 02:06 PM | 
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| Max Sluiter | Quote: 
   
				__________________ 1971 911S, 2.7RS spec MFI engine, suspension mods, lightened Suspension by Rebel Racing, Serviced by TLG Auto, Brakes by PMB Performance | ||
|  02-17-2011, 05:27 PM | 
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