Dwell setting 12? - Team Camaro Tech
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post #1 of 7 (permalink) Old Aug 9th, 02, 01:28 PM Thread Starter
Join Date: May 2002
Location: Laurel, MD USA
Posts: 7
Hi all...Just recently picked up a 69 rs/ss 396/350 stock. At high rpm's it seemed to have a little valve rattle, so I proceeded to check the dwell and timing. Dwell was set at 11 and timing at TDC. I tried setting the dwell to specs 28-32 and adjusted the timing. The motor wold break down badly. So after an hour or so of playing with this, I ended up setting the dwell at 12 and timing at TDC. Runs fairly good. Whats up with this????

Thanks in advance for any input.
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post #2 of 7 (permalink) Old Aug 9th, 02, 01:54 PM
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Location: Fortuna, CA
Posts: 26,461
Set #1 to TDC and verify the dampner and pointer are correct.

"The '69, the '96 & the club"
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post #3 of 7 (permalink) Old Aug 9th, 02, 02:22 PM Thread Starter
Join Date: May 2002
Location: Laurel, MD USA
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With #1 at TDC the mark on the harmonic balancer is lined up with the TDC mark on the degree indicator tab. It's been a long time since I've worked on these cars, so I'm a little rusty. Needless to say this has got me realy confused.
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post #4 of 7 (permalink) Old Aug 9th, 02, 02:42 PM
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Join Date: May 2001
Location: Houston, Texas
Posts: 4,491
If the dwell was at 12, it wouldn't run.

Verify you're on the right scale on your dwell meter.

Don~ ZZ430DropTop
70 RS/Z28
67 RS/SS Convertible, 70 RS/Z28

[This message has been edited by ZZ430DropTop67RS (edited 08-09-2002).]
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post #5 of 7 (permalink) Old Aug 9th, 02, 03:01 PM Thread Starter
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Location: Laurel, MD USA
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The instrument I am using is a volt, dwell, rpm meter. I am reading the V8 scale. Maybe there is a problem with the meter. I will try to find another meter to verify asap.
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post #6 of 7 (permalink) Old Aug 9th, 02, 04:28 PM
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Location: LR AR
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Set a new set of points with a feeler gauge if you are unsure of the dwell meter. That should get you started.

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post #7 of 7 (permalink) Old Aug 10th, 02, 04:03 AM
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Location: Riverdale,Ga. U.S.A.
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I hate to pop in without positive info but it seems to me I ran into this problem back in the 70's and it was because of excessive shaft end play. Setting the gap statically seems like it should be in the ballpark but then cranking it and using the dwell meter showed variations that shouldn't have been there that the engine shouldn't have been able to run on. Changed to an HEI and never looked back.

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