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Old 10-04-2012, 02:43 PM
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Vacuum advance canister?

I am looking for the ac delco B28 vacuum canister, but discovered they are discontinued. Is the Autozone DV-1810 the same type of canister? I need a B28 style. Apparantly, they operate on 6-8" of vacuum, is this correct? Anybody know how much timing the B28 will add with 8" of vacuum it idle, (800rpm-in gear)?

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Old 10-04-2012, 03:17 PM
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I think that's correct on the vacuum if I recall correctly

Last edited by DoubleVision; 10-04-2012 at 03:29 PM.
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Old 10-05-2012, 09:34 AM
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Yes the 1810 (B28 spec) if its NAPA uses VC-1810 and autozone uses DV-1810, they should be all in by 8" hg and add up to 16 degrees crank timing @idle on manifold vac, they have a low starting point of about 3" hg. Cant speak for their availability.

For my money the crane points style dist vac adv kit 99601-1 may be a better choice with an adjustable canister. If it is anything like the HEI crane kit you should be able to duplicate the 3-8" hg operation of the B28 along with the 5" hg range. It comes with the limiter plate and springs allowing further tweaking.
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Old 10-05-2012, 11:04 PM
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What cars are these used on???

I just installed a new one from a high performance model and it doesn't even start to operate untill 10-12 inches of vac. at about 15 inches it is all in using a vac pump.
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Old 10-06-2012, 01:27 AM
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Some applications are listed in the following thread: Centrifugal advance
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Old 10-09-2012, 01:11 AM
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Cobalt....the units in the thread are for HEI...is there something similar for point style?? My MSD pro billet uses the point style.
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Old 10-09-2012, 10:05 AM
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Quote:
Originally Posted by bentwings View Post
Cobalt....the units in the thread are for HEI...is there something similar for point style?? My MSD pro billet uses the point style.
Not that I'm aware of. If I run across anything I'll post it here.
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Old 10-09-2012, 11:33 AM
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Quote:
Originally Posted by bentwings View Post
Cobalt....the units in the thread are for HEI...is there something similar for point style?? My MSD pro billet uses the point style.
See if this helps: Tech Tips
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Old 10-09-2012, 09:43 PM
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Thanks. Very informative article.
I think I found what I need in the list.

Since my vac at idle is relatively low, the B28 or VC 1810 is the one to use.
It's not recommended except for application with low vac and radical cams.

I'll order one this week and give it a try. Can't be any worse than what I have.

Thanks again
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Old 10-16-2012, 11:31 PM
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Well hitting AZ, NAPA, and O'reiley I came up with a blank. they could not find the unit I requested.

Gave up and ordered an adjustable vac advance unit. I did find the specs for it on the Accell web site. It is pretty fast acting in that it starts advancing at pretty low vac and is all in by 12-13 in at max deg of advance. About 1/2 way should work for my blower motor. I'm thinking about 10 crank deg to start and maybe work up to 15. I'm sure hoping to pick up the mpg I've lost since busting the original vac adv.

I won't get to try it untill the week end however. I have senior baseball practice both days so I'm going to be pretty worn out.
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Old 10-17-2012, 08:27 PM
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Got the adj vac adv today.

Quality leaves a lot to be desired. I spent about 20 min trying to get the allen wrench to engage the internal hex. Finally I tweeked the mounting bracket and gently forced the allen wrench into the socket. The internal guts seemed to be loose in that turning the allen wrench ccw as instructed only met with limited resistance then a "click." I wiggled the actuator rod a little and the internal guts seemed to take a seat.

From here I can adjust it as per the instructions. Sure hope this thing stays adjusted as it will be very difficult to reach once installed.

Made in the USA I think.
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Old 10-18-2012, 09:40 AM
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Quote:
Originally Posted by bentwings View Post
Got the adj vac adv today.

Quality leaves a lot to be desired. I spent about 20 min trying to get the allen wrench to engage the internal hex. Finally I tweeked the mounting bracket and gently forced the allen wrench into the socket. The internal guts seemed to be loose in that turning the allen wrench ccw as instructed only met with limited resistance then a "click." I wiggled the actuator rod a little and the internal guts seemed to take a seat.

From here I can adjust it as per the instructions. Sure hope this thing stays adjusted as it will be very difficult to reach once installed.

Made in the USA I think.
Accell products have been questioned for quality issues before, I doubt it is a native soil piece. Interested to know if the adjustments actually allow you to set the limit or the max amount of vacuum advance as well as the starting point/range as claimed. I guess you will need to put a light on the motor and check it to see, let us know.
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Old 10-18-2012, 02:58 PM
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Quote:
Originally Posted by bentwings View Post
Thanks. Very informative article.
I think I found what I need in the list.

Since my vac at idle is relatively low, the B28 or VC 1810 is the one to use.
It's not recommended except for application with low vac and radical cams.

I'll order one this week and give it a try. Can't be any worse than what I have.

Thanks again
I went to Autozone last week and ordered an AR15 can for my HEI Pro Billet, they can order the vc1810, but use their number-DV1810, they sell them for $11.99, go to the AZ web site and punch in the number....
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Old 10-18-2012, 07:26 PM
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Thanks. I think I will get one of these too.

Why does it take an auto enthusiast to weasle a part number out of auto parts stores??
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Old 10-18-2012, 08:18 PM
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Quote:
Originally Posted by Madmax305 View Post
I went to Autozone last week and ordered an AR15 can for my HEI Pro Billet, they can order the vc1810, but use their number-DV1810, they sell them for $11.99, go to the AZ web site and punch in the number....
Yep that is what I posted DV1810, but who's listening?,,,I digress

Quote:
"Why does it take an auto enthusiast to weasle a part number out of auto parts stores??"
Who else can?,,,speaking of cans are you going to check the limit on the unit
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