what timing
Thread Starter
Pro
Joined: Jan 2003
Posts: 528
Likes: 5
From: Templeton Ca
what timing
im looking for the timing for my '66 327/300 . my Chiltons manual list these distributors and timing for them:
1111152 8btdc
1111116 2atdc
1111153 6btdc
1111117 4atdc
my distributor is a rare on and not listed , it's
1111134
I was told it was listed in an old Delco-Remy book as a distributor for this engine but I can't find any info on it .
1111152 8btdc
1111116 2atdc
1111153 6btdc
1111117 4atdc
my distributor is a rare on and not listed , it's
1111134
I was told it was listed in an old Delco-Remy book as a distributor for this engine but I can't find any info on it .
Safety Car
Joined: Feb 1999
Posts: 3,631
Likes: 14
From: Fountain Hills AZ
The manuals assume that your distributor still has the same specs as original. Replacement, rebuilds, wear, or modifications can make original figures meaningless. I'd start by setting total to about 36º. If that results in too much or too little initial, the distributor will need to be recurved. Be sure to rev it until the advance is all in before setting total as many factory (and rebuilds) don't reach max advance until 4-5K.
Team Owner
Joined: Mar 2003
Posts: 26,118
Likes: 1,874
From: Greenville, Indiana
1111134 was replaced in service, 4-'67 with 1111154.
1111154 was replaced in service, 7-'67 with 1111195.
The above would have been service replacements for you OEM distributor which I believe is a 1111153.
If you have/had the '66 engine with A.I.R., it uses the 111117 but the above distributors are not replacements for that engine.
I would follow VetteRodders advice and see what you come up with.
1111154 was replaced in service, 7-'67 with 1111195.
The above would have been service replacements for you OEM distributor which I believe is a 1111153.
If you have/had the '66 engine with A.I.R., it uses the 111117 but the above distributors are not replacements for that engine.
I would follow VetteRodders advice and see what you come up with.
Melting Slicks
Joined: Jul 2004
Posts: 2,867
Likes: 195
From: Maryland
Assuming the 11153 distributor is unmolested it has the following ignition curve
0* @ 900 RPM
15*@ 1600 RPM
26*@ 4100 RPM
At 6* BTD initial your total advance @4100 would be 32*. You might want to bump up the initial timing to 10* and bring the total advance in earlier to say 3400 RPM for better engine response.
0* @ 900 RPM
15*@ 1600 RPM
26*@ 4100 RPM
At 6* BTD initial your total advance @4100 would be 32*. You might want to bump up the initial timing to 10* and bring the total advance in earlier to say 3400 RPM for better engine response.
Melting Slicks
Joined: Aug 2001
Posts: 3,003
Likes: 100
From: Phoenix AZ
The manuals assume that your distributor still has the same specs as original. Replacement, rebuilds, wear, or modifications can make original figures meaningless. I'd start by setting total to about 36º. If that results in too much or too little initial, the distributor will need to be recurved. Be sure to rev it until the advance is all in before setting total as many factory (and rebuilds) don't reach max advance until 4-5K.
http://www.lbfun.com/warehouse/tech_...stallation.pdf
Thread Starter
Pro
Joined: Jan 2003
Posts: 528
Likes: 5
From: Templeton Ca
Thanks for all the responses and the link to Lars timing info Dicecal . I've never tried to get total advance set so I guess I'll do some measuring and give it a try .
I think I might be about a tooth off too.
I think I might be about a tooth off too.
Thread Starter
Pro
Joined: Jan 2003
Posts: 528
Likes: 5
From: Templeton Ca
timing again
So after reading the articles/posts about my distributor and timing I put the original black springs and weights (changed when the rebuilt.
Borrowed a adjustable timing light , set the timing at 10 btc, and at 2500 rpm the timing light zeros out at 24 degrees . Does this give me a total timing of 34 degrees ? This is all with the vacuum hose removed and plugged .
I've never tried to get the total before and if i did it right I'll try to determine the curve .
Borrowed a adjustable timing light , set the timing at 10 btc, and at 2500 rpm the timing light zeros out at 24 degrees . Does this give me a total timing of 34 degrees ? This is all with the vacuum hose removed and plugged .
I've never tried to get the total before and if i did it right I'll try to determine the curve .
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Racer
Joined: Feb 2011
Posts: 497
Likes: 7
From: Sweden
So after reading the articles/posts about my distributor and timing I put the original black springs and weights (changed when the rebuilt.
Borrowed a adjustable timing light , set the timing at 10 btc, and at 2500 rpm the timing light zeros out at 24 degrees . Does this give me a total timing of 34 degrees ? This is all with the vacuum hose removed and plugged .
I've never tried to get the total before and if i did it right I'll try to determine the curve .
Borrowed a adjustable timing light , set the timing at 10 btc, and at 2500 rpm the timing light zeros out at 24 degrees . Does this give me a total timing of 34 degrees ? This is all with the vacuum hose removed and plugged .
I've never tried to get the total before and if i did it right I'll try to determine the curve .
Remove the springs or use a rubberband to hold the springs in place while you set the timing to 36* @ 2800rpm.
Re-install the springs / remove rubberband but leave the vacuum disconnected, fire it up, do a few quick rev’s past 3,000 rpm and verify that the full timing 36*comes in. If not, you need a softer set of springs so you get full 36* advance before 3000 rpm.
Connect vacuum and do a roadtest and listen for detonation and back off a bit if necessary.
Btw...Thanks to Lars for how to set a proper timing for performance.
Race Director
Joined: Jul 2001
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Team Owner
Joined: Mar 2003
Posts: 26,118
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From: Greenville, Indiana
Further, if the cap is rewired to compensate for the "tooth off" condition, that tends to confuse others that may be working on that engine in the future.
The "half tooth off" deal is what is rough on midyear SBC Corvette owners.
Team Owner
Joined: Oct 2000
Posts: 38,897
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From: Washington Michigan
