C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

HEI capacitor

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Old Jul 13, 2005 | 10:02 AM
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Default HEI capacitor

Hi folks, new to the board.

Question: Has anyone here ever had the little HEI capacitor blow out? What were your symptoms (besides radio noise)? Did you figure out what caused it?

Engine is a MiniRammed ZZ4.

Thanks.
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Old Jul 13, 2005 | 10:54 AM
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From: Chandler AZ
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Though I haven't had this issue, I wanted to say welcome to the board. I would imagine if the capacitor did go open, it could cause radio noise and possible damage to the module from spikes it is supposed to supress.

Once again, welcome to the board.
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Old Jul 13, 2005 | 05:49 PM
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From: Rolla Mo
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Cant help you there but I have to ask, how do you like that miniram on the ZZ4?

Thanks,
Doug
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Old Jul 13, 2005 | 10:17 PM
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Love the MiniRam. At least when the engine was running right.
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Old Jul 14, 2005 | 09:48 AM
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From: Rolla Mo
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Wich MiniRam are you using and what cam?

Thanks,
Doug
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Old Jul 14, 2005 | 10:02 AM
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Originally Posted by ULTM8Z
Hi folks, new to the board.

Question: Has anyone here ever had the little HEI capacitor blow out? What were your symptoms (besides radio noise)? Did you figure out what caused it?

Engine is a MiniRammed ZZ4.

Thanks.
I was working for GM when the HEI system was introduced. Since then I have only seen on instance of that cap going bad. All that happened to that particular car was noise in the radio. In that case, the cap was just bad, it didn't physically come apart.
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Old Jul 14, 2005 | 07:03 PM
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I've heard claims that the car won't run at all, all the way to that the car can run fine without it. Is there a way to test the thing to see if it's bad?


I'm running the MiniRam I with a comp cams 212°/218° roller and AFR 180 cc heads.
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Old Jul 16, 2005 | 01:57 AM
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From: Rolla Mo
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If I remember correctly that part is only $9. I replaced mine when I installed my MSD box.
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