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Smart quod bastardus
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Ok here are the measurements I took today:
1) First the 0.8 bar stock spring-------- Spring Length = 7.0 inch Outer diameter = 2.70 inch Number of effective coils = 5.5 Wire diameter = 0.196 inch Installed height in WG = 2.5 inch Measured spring rate = 22lb/inch 2) Now the 1.0 bar spring---------- Spring Length = 7.25 inch Outer diameter = 2.70 inch Number of effective coils = 5.5 Wire diameter = 0.212 inch Installed height in WG = 2.5 inch Measured spring rate = 27lb/inch This should give you enuff information to order a custom spring if you do not find an OEM unit. From my calculations......at installed height in the Wastegate, the 0.8bar spring force required to pop the valve is about 101 lbs. for the 1.0bar spring it is 124lbs. Good luck ![]() ![]() ![]()
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1979 930 Turbo....3.4L, 7.5to1 comp, SC cams, full bay intercooler, Rarlyl8 headers, Garret GTX turbo, 36mm ported intakes, Innovate Auxbox/LM-1, custom Manually Adjustable wastegate housing (0.8-1.1bar),--running 0.95 bar max ---"When you're racing it's life! Anything else either before or after, is just waiting" Last edited by fredmeister; 03-08-2008 at 09:46 PM.. |
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Registered User
Join Date: Aug 2007
Location: The Golden State
Posts: 1,533
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Fred thank you for the specs!
I can see you spent some time in getting this information and I appreciate it! Appears my spring is stock! Thanks to everyone for their input.
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Rod... 2010 - 997 PDK, Black on Black, Daily driver. 1987 - 930 Grand Prix White, Not looking for crazy HP, just harmony! |
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Registered
Join Date: Aug 2007
Location: Denver CO
Posts: 312
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My nib 1 bar spring is 6.75" long
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1979 930 Euro 50k:Lindren Green:B&B Dual Out Pipes:K27:965 I/C: --SOLD!! ![]() |
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A fellow Pelacanite
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Measure the wire diameter, I'm gonna guess it's thicker.
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1981 UK 930. G50/01 shortened, 964 3.8RS Fibreglass Body Kit, 18" Alloys 8.5" F & 10" R, 225's F & 285's R, Special Colour Metallic Blue Paint, FIA Sparco Evo's, A/C and Air Pump removed, Electronic Boost Controller, GHL Headers, Tial46 WG. Fitting - New service kit. Needs Fitting - Innovate XD-16 Kit, Kokeln IC. Stephen's K27 HFS, EVO Intake Assy & his Modded USA Fuel Head. 1983 UK 911 3.2 Carrera Sport Coupe. Black, Black Leather with Red Piping, Black Alloy Gear Knob, K&N Air Filter Element, Turbo Tie rods. Needs Fitting - K&N CO Sensor, Round A/F Dial Gauge, Factory Short Shift Kit. http://www.danasoft.com/sig/Iamnotanumber.jpg |
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Drivin' Miss Daisy
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Quote:
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58 VW Split Window Bus - Porsche Powered 78 911SC Turbo Look - Megasquirt II, EDIS, 964 intake 92 964 Turbo |
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Registered
Join Date: May 2002
Location: Georgia
Posts: 2,869
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No, I found a .7 spring and bought it...still on the shelf as I havn't done the conversion yet. I might get to it this winter. I've been having too much fun driving the car to want to work on it.
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1986 3.2 Carrera |
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Drivin' Miss Daisy
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Thanks.
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58 VW Split Window Bus - Porsche Powered 78 911SC Turbo Look - Megasquirt II, EDIS, 964 intake 92 964 Turbo |
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