Mallory failure, Optical sensor |
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Mallory failure, Optical sensor |
jeffdon |
Dec 8 2013, 03:13 PM
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#1
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Senior Member Group: Members Posts: 1,094 Joined: 24-October 06 From: oakland, ca Member No.: 7,087 Region Association: None |
Looks like I fried the optical sensor in my Mallory. Did some timing work, shut it down, then went out a few hours later to go for a drive. No spark. Put my old 009 with pertronix back in and its running.
Questions - 1) I have a bosch blue coil, and its measuring 3 ohms pos to neg, and 8k coil wire to either neg or pos. This seems a little low. Could it have been the cuplrit in killing my dizzy? 2) From what I have read, the blue coil has an internal resistor. Would adding a ballast resistor provide additional protection to the Mallory(once fixed) or would it just run like crap? |
gothspeed |
Dec 9 2013, 07:44 PM
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#2
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Senior Member Group: Members Posts: 1,539 Joined: 3-February 09 From: SoCal Member No.: 10,019 Region Association: None |
here is some info from msd, I am sure they are promoting their product, but there is probably some truth in their info as well.
http://www.msdignition.com/uploadedFiles/M..._vs_optical.pdf |
Jake Raby |
Dec 9 2013, 08:43 PM
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#3
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Engine Surgeon Group: Members Posts: 9,398 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
here is some info from msd, I am sure they are promoting their product, but there is probably some truth in their info as well. http://www.msdignition.com/uploadedFiles/M..._vs_optical.pdf I have over 800 Mallory Uni-Lite equipped engines all over the planet. Of those I can count the failures of the optical pick up that have made their way back to me on one hand. That includes running from Amsterdam to Beijing and from the northernmost tip of Africa all the way to the southernmost cape, mostly on dirt roads. Both those treks were with the same engine and the same dizzy, with no issues. Thats in a Type 4 application, as well. Unless some variable imposes a collateral condition I don't believe the optical unit will fail. |
gothspeed |
Dec 9 2013, 08:48 PM
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#4
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Senior Member Group: Members Posts: 1,539 Joined: 3-February 09 From: SoCal Member No.: 10,019 Region Association: None |
I have over 800 Mallory Uni-Lite equipped engines all over the planet. Of those I can count the failures of the optical pick up that have made their way back to me on one hand. That includes running from Amsterdam to Beijing and from the northernmost tip of Africa all the way to the southernmost cape, mostly on dirt roads. Both those treks were with the same engine and the same dizzy, with no issues. Thats in a Type 4 application, as well. Unless some variable imposes a collateral condition I don't believe the optical unit will fail. Well that is a good data sample ...... what coil and wires do you recommend using with this Unilite ? |
Jake Raby |
Dec 9 2013, 09:35 PM
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#5
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Engine Surgeon Group: Members Posts: 9,398 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
I have over 800 Mallory Uni-Lite equipped engines all over the planet. Of those I can count the failures of the optical pick up that have made their way back to me on one hand. That includes running from Amsterdam to Beijing and from the northernmost tip of Africa all the way to the southernmost cape, mostly on dirt roads. Both those treks were with the same engine and the same dizzy, with no issues. Thats in a Type 4 application, as well. Unless some variable imposes a collateral condition I don't believe the optical unit will fail. Well that is a good data sample ...... what coil and wires do you recommend using with this Unilite ? Magnecor are the best. |
gothspeed |
Dec 10 2013, 12:51 AM
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#6
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Senior Member Group: Members Posts: 1,539 Joined: 3-February 09 From: SoCal Member No.: 10,019 Region Association: None |
I have over 800 Mallory Uni-Lite equipped engines all over the planet. Of those I can count the failures of the optical pick up that have made their way back to me on one hand. That includes running from Amsterdam to Beijing and from the northernmost tip of Africa all the way to the southernmost cape, mostly on dirt roads. Both those treks were with the same engine and the same dizzy, with no issues. Thats in a Type 4 application, as well. Unless some variable imposes a collateral condition I don't believe the optical unit will fail. Well that is a good data sample ...... what coil and wires do you recommend using with this Unilite ? Magnecor are the best. what about the coil? |
Jake Raby |
Dec 10 2013, 05:49 AM
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#7
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Engine Surgeon Group: Members Posts: 9,398 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
I have over 800 Mallory Uni-Lite equipped engines all over the planet. Of those I can count the failures of the optical pick up that have made their way back to me on one hand. That includes running from Amsterdam to Beijing and from the northernmost tip of Africa all the way to the southernmost cape, mostly on dirt roads. Both those treks were with the same engine and the same dizzy, with no issues. Thats in a Type 4 application, as well. Unless some variable imposes a collateral condition I don't believe the optical unit will fail. Well that is a good data sample ...... what coil and wires do you recommend using with this Unilite ? ONLY a Mallory unit. I like the E Coil. Magnecor are the best. what about the coil? Mallory components don't like MSD, Bosch or other coils. Keep all compatible components and you'll be a lot better off. |
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