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Registered
Join Date: Jul 2005
Location: Cleveland, OH
Posts: 1,367
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Race valve springs...
What do folks recommend for race valve springs? running 993rsr cams.
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01-07-2019, 02:16 PM
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Registered
Join Date: Oct 2005
Location: Northern California
Posts: 3,747
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I am pretty sure all of my engines have used Randall Aase's parts. Time tested I reckon.
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Mike PCA Golden Gate Region Porsche Racing Club #4 BMWCCA NASA |
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01-08-2019, 09:53 AM
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Schleprock
Join Date: Sep 2000
Location: Frankfort IL USA
Posts: 16,639
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The AASCO, EBS Racing VMax and the recent Eibach springs all get good reviews from people. Not too much seat pressure and not too much over the nose/open pressure.
AASCO also makes the titanium retainers for the 993's smaller 8mm valve stems, which is nice
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Kevin L '86 Carrera "Larry" |
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01-08-2019, 09:56 AM
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It's a 914 ...
Join Date: Jan 2008
Location: Ossining, NY
Posts: 4,706
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Does EBS still make the VMax springs for 911s? I looked quickly at their site and only saw them for Boxster/996?
Aasco does seem to have a proven product. I noticed that they are good for .520" lift. This is a lot of lift, but there are cams out there with more than .520". I wonder what springs people use for those? Scott |
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01-09-2019, 05:13 AM
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Registered
Join Date: Jul 2005
Location: Cleveland, OH
Posts: 1,367
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Yes ebs has them. I just had them quote. You also need to get there seats and retainers. As best I’ve calculus ebs ones have most loft potential. At 75lb seat pressure 0.568” lift and at 88 lbs seat press 0.0.528lift. Both with 0.050” margin to coil bind
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01-09-2019, 06:17 AM
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Schleprock
Join Date: Sep 2000
Location: Frankfort IL USA
Posts: 16,639
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Unfortunately EBS Racing's website seems like it has always been a struggle. I feel like they have much to offer that is NOT on their website. For instance they promote the nice CP Carrillo pistons in their email subscription but you won't find them on their site.
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Kevin L '86 Carrera "Larry" |
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01-09-2019, 07:12 AM
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Schleprock
Join Date: Sep 2000
Location: Frankfort IL USA
Posts: 16,639
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AASCO does a nice job of describing their springs in their spec sheet. You have to scroll down the page a bit to see the link/image in the "Technical Information" box
Products | Valvetrain I've heard Kibblewhite touted only a few times, but I haven't heard of anybody's direct experience with them. Automotive, Porsche®, 911/ 930/ 964/ 2VÂ*| Kibblewhite Precision Machining, Inc
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Kevin L '86 Carrera "Larry" |
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01-09-2019, 07:50 AM
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Puny Bird
Join Date: Nov 2002
Location: Port Hope (near Toronto) On, Canada
Posts: 4,566
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Quote:
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'74 Porsche 914, 3.0/6 '72 Porsche 914, 1.7, wife's summer DD '67 Bug, 2600cc T4,'67 Bus, 2.0 T1 Not putting miles on your car is like not having sex with your girlfriend, so she'll be more desirable to her next boyfriend. |
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01-09-2019, 12:03 PM
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Schleprock
Join Date: Sep 2000
Location: Frankfort IL USA
Posts: 16,639
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Yep Mark is correct Eibach has two versions available for the old 911.
Here's the current catalog listing for the valve springs. I took a catalog snapshot of the Porsche springs so we don't have to rely on the link in the future https://eibach.pl/files/Eibach_EVS.pdf 
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Kevin L '86 Carrera "Larry" |
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01-09-2019, 12:24 PM
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Chain fence eating turbo
Join Date: Dec 2008
Location: Austin, TX
Posts: 9,126
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I believe John Dougherty's website tells you what force?
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Cory - turbo'd '87 C3.2 Guards/Blk, 3.4, 7.5:1 CR P & C's, 993SS cams, Borg-Warner S366 turbo @ 1.2-1.5 bar, depending on mood  , Treadstone full bay IC, 70mm TB, TiAL F46 WG, HKS 1 1/2" BOV, twin 044 pumps, MicroSquirt AMP'd w/GM smart coilpack, Bilstein coilovers, Tramont wheels (285's rr, 225's frt), Big Reds frt, 993 rr., tower brace, MOMO wheel
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01-09-2019, 12:27 PM
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