 Which Spring is Sprung?, Not sure we have the answer here at 914 World ? |
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| ctc911ctc |
 May 20 2025, 06:55 PM
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Senior Member  Group: Members Posts: 1,129 Joined: 9-June 18 From: boston Member No.: 22,206 Region Association: North East States 
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1970 916-6 all original
I rebuilt the Marelli distro, it was caked in grease and the shaft was sticking because of the shaft grease had turned into glue,,,,,,,typical stuff. Purchased the rebuild kit from one of our best vendors, and when I went to replace the springs I noticed that one was very different from within the kit. Sooooo, either the kit is wrong or the previous owner/mechanic/factory used a different spring formula.  The ones on the left are the same, each are in good shape, the ones on the right are VERY different. My guess is that the advance curve is designed to be smoother through the arc of the engine RPMs, where one side of the two weights advances first and then the other. My concern is that the stiffer spring is really stiff, even on a log scale there is a long way between these two. Any ideas as to which is the correct one? (Yes I did triple check that I had ordered the correct kit.) |
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| porschetub |
May 20 2025, 09:46 PM
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#2
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Advanced Member Group: Members Posts: 4,830 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
QUOTE(ctc911ctc @ May 21 2025, 12:55 PM)  1970 916-6 all original I rebuilt the Marelli distro, it was caked in grease and the shaft was sticking because of the shaft grease had turned into glue,,,,,,,typical stuff. Purchased the rebuild kit from one of our best vendors, and when I went to replace the springs I noticed that one was very different from within the kit. Sooooo, either the kit is wrong or the previous owner/mechanic/factory used a different spring formula. The ones on the left are the same, each are in good shape, the ones on the right are VERY different. My guess is that the advance curve is designed to be smoother through the arc of the engine RPMs, where one side of the two weights advances first and then the other. My concern is that the stiffer spring is really stiff, even on a log scale there is a long way between these two. Any ideas as to which is the correct one? (Yes I did triple check that I had ordered the correct kit.) Did you buy the BX or AX kit ? , yours will be an AX dizzy if correct fitment ? The kit you have could be a BX type which from memory is for the 2.4T dizzy and has a different advance requirement hence the heavy springs. IMO fit the springs for your old unit if correct as you mentioned the engine ran fine previously ,can't see an issue here ,cheers. |
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Posts in this topic
ctc911ctc Which Spring is Sprung? May 20 2025, 06:55 PM
ClayPerrine It is the bigger spring on the right. Marelli dist... May 20 2025, 08:45 PM
ctc911ctc
It is the bigger spring on the right. Marelli dis... May 20 2025, 09:04 PM ClayPerrine I have 3 marelli distributors for the 914-6. All ... May 21 2025, 06:04 AM ctc911ctc
I have 3 marelli distributors for the 914-6. All... May 21 2025, 07:15 AM ClayPerrine
I have 3 marelli distributors for the 914-6. Al... May 21 2025, 07:21 AM ClayPerrine You need one big one, and one small one to get the... May 21 2025, 07:21 AM |
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