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Interesting Stuff

RTSTools now up! Like RTSAuto, but for tools and related tips.

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July 24, 2017
RTSTools now up! Like RTSAuto, but for tools and related tips.

Tools come with the territory of being a gear head and a car enthusiast. We are just as passionate about tools as we are cars and love sharing tool information. That is why the second installment in the RTS project is now up and running at www.Rtstools.com
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Progressive Vs Linear springs

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July 13, 2017

Linear springs: Linear springs require the same amount of force per inch of compression throughout its full travel. Almost all OEM’s use linear springs for three main reasons: 1.The automaker has the luxury of designing the strut, tower, and suspension geometry around their spring and shock. Therefore if they want the car to be...
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E30 Stock Spring options and Spring rates

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July 5, 2017
E30 Stock Spring options and Spring rates

These are from technical specification drawings for stock E30 springs straight from BMW Germany. The spring forces and lengths were from BMW Germany, while I calculated the spring rates to accurately compare the springs per inch of travel. Only looking at spring force does not allow you to compare springs because it only signifies the force...
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E30 Electrical troubleshooting schematics

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July 2, 2017

        1988 E30 M3 Electrical Schematics 1987 E30 M3 Electrical Schematics 1990 E30 IX Electrical Schematics 1989 E30 IX Electrical Schematics 1988 E30 IX Electrical Schematics 1992 E30 Convertible Electrical Schematics 1990 E30 Convertible Electrical Schematics 1989 E30 Convertible Electrical Schematics 1988 E30 Convertible Electrical Schematics 1992 E30 Electrical Schematics 1991...
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E30 Torque Specs and Technical Specifications

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June 30, 2017

      Engine Torque Specs: Camshaft chain tensioner rail Securing nut……………………………………………………………………….35 ± 5 Nm (26 ± 4 ft. lb.) Camshaft drive belt tensioner to engine (Bolts)………………………………………………………………………….…………..22 ± 2 Nm (16 ± 1 ft. lb.) Camshaft oil carrier to cylinder head M6 bolts …………………………………………………………………………..…….9 ± 1 Nm (80 ± 9 in.lb.) M8 bolts………………………………………………………………………………22 ±...
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BMW Motronic Tuning, specifically Motronic 1.3, 1.1 and 1.0

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December 30, 2016
BMW Motronic Tuning, specifically Motronic 1.3, 1.1 and 1.0

*If you have .bin files for chips or XDF files for these ECU’s please email them to me at admin@rtsauto.com and I will upload them to this page as a resource for others.* Bosch Motronic 1.3, 1.1, 1.0, 1.7 are the primary ECU’s that power all E30’s. 1.3, 1.1, 1.0 for M20’s (6 cylinders)...
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How dealer auctions work and where dealerships get their used cars from; how to buy a good car

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December 12, 2016
How dealer auctions work and where dealerships get their used cars from; how to buy a good car

The used car market in north america is a very saturated market and therefore heavily standardized. Below is some information that will make you a better informed buyer:   Where do original and used car dealerships get their cars from? Used car dealerships leverage either of two systems: Buying cars from dealership auctions  The...
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BMW ETK part catalogue

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September 18, 2014
BMW ETK part catalogue

There are many online based ETK systems like realoem and bmwfans.info for BMW parts and most work great, however none are as accurate and up to date as the ETK directly from BMW. Luckily BMW has their ETK available online with a general login. To access it just press the link below and enter the...
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E30, BMW, and Mercedes Driveshaft and u-joint rebuild, non-serviceable u-joints.

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January 3, 2014

BMW (including E30’s) and some Mercedes drive-shafts particularly of the 80’s-90’s vintage have what are called non-serviceable staked in u-joints. Over-time the grease inside the u-joints drys out, get pasty or otherwise stops performing its job; this causes the u-joint needle bearings to bind. Binding u-joints will cause vibrations to be felt at a...
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The mystery of the unknown BMW Vin number

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June 8, 2013
The mystery of the unknown BMW Vin number

Many months ago I took out a 380 ECU out of my E30, expecting to find a 153 ECU, that I changed with a 173. The Vin sticker on the ECU reads: WBATE5FFHA1716242 It seem that this VIN does not exist? When I search the last 7 digits in realoem/BMW ETK I get an...
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