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Eye of the Toiger
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MSD & Ignition upgrade
I want to upgrade my Ignition and distributor, what parts should I purchase to to the upgrade.
I have a 2.7L with Bosch Dist and Stock Ignition. Advice appreciated
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http://www.aircooled.com.au 1973 911 RSR clone powered by 77 3.0 turbo |
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02-01-2006, 04:58 PM
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Registered
Join Date: Nov 2004
Location: Greater Metropolitan Nimrod, Oregun
Posts: 10,040
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I'd get rid of the points.
Is your Bosch CDI Box bad? I sure wouldn't toss it out if not. Test your spark plug cables and see what resistance they have. There is no up grade if the stock ignition works well...
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"A man with his priorities so far out of whack doesn't deserve such a fine automobile." - Ferris Bueller's Day Off |
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02-01-2006, 05:34 PM
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Eye of the Toiger
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what kit can I get to replace the points and how can I tell if it has not been done already. CDI is fine how is this compared with a MSD?
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http://www.aircooled.com.au 1973 911 RSR clone powered by 77 3.0 turbo |
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02-01-2006, 05:41 PM
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Registered
Join Date: Nov 2003
Location: Ags, Mx or McAllen, TX
Posts: 2,792
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get the Crane XR 700 or if you are looking for a cheaper setup try the Petronix
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X/A |
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02-01-2006, 05:51 PM
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Join Date: Nov 2004
Location: Greater Metropolitan Nimrod, Oregun
Posts: 10,040
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Look in the dist. and see if the points are in there. If not sure, take a pic and post it.
The MSD is simply a replacement for the existing Bosch CDI box. It does nothing more except for the multi-spark at moderate rpm.
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"A man with his priorities so far out of whack doesn't deserve such a fine automobile." - Ferris Bueller's Day Off |
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02-01-2006, 07:09 PM
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GOT TURBO..
Join Date: Jan 2005
Location: Southern Sunny California
Posts: 552
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Better start up, diff in revs, but not alot on 2.7s. More reliable than a stock bosch
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02-01-2006, 08:23 PM
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Registered
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I have and MSD & Petronic ignition on my 77 and work great
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A L Rolon |
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02-01-2006, 08:32 PM
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Moderator
Join Date: Dec 2001
Posts: 9,569
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Going from Bosch to MSD or Permatune isn't an upgrade. The voltage to the coil is about the same, spark duration isn't materially different. If you have modified the engine you might need a different system, but even the legendary 935 used a Bosch CDI's (some a pair of them).
Some people believe that the points are the weak link in the system, but they aren't. With a CDI, the points carry almost no current and will last for tens of thousands of miles. Optical or hall effect triggers are just one more thing to go wrong. I would focus on making sure the stock ignition system is up to specifications-- check the cap, rotor and plug leads out, and make certain the mechanical and vacuum advance are working correctly on the distributor. That will give you the maximum bang for the buck.
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'66 911 #304065 Irischgruen ‘96 993 Carrera 2 Polarsilber '81 R65 Ex-'71 911 PCA C-Stock Club Racer #806 (Sold 5/15/13) Ex-'88 Carrera (Sold 3/29/02) Ex-'91 Carrera 2 Cabriolet (Sold 8/20/04) Ex-'89 944 Turbo S (Sold 8/21/20) |
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02-02-2006, 06:04 AM
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porsche
