Mancini vs Mr. Gasket distributor advance springs
#2701992
09/29/19 01:42 PM
09/29/19 01:42 PM
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Joined: May 2011
Posts: 220 Aurora, CO
jbeintherockies
OP
enthusiast
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OP
enthusiast
Joined: May 2011
Posts: 220
Aurora, CO
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Hi, Has anyone on here tried both the Mancini and Mr. Gasket distributor advance springs? I was wondering if there is any difference in spring stiffness between the two. https://www.manciniracing.com/disadweigspr.htmlThe car I am working on has what appears to be a Mopar Performance distributor. https://drive.google.com/file/d/11wCWbwdOc88JX-NO2QipOSd-XHDh5A8M/view?usp=sharingI have read to use one Mr. Gasket spring and one of the springs that comes with the distributor to get my total timing all-in at around 2500 rpm. Right now, it is all-in at about 3000 rpm. I will call Mancini on Monday to see what they suggest. Thank you in advance for the help. Jon
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Re: Mancini vs Mr. Gasket distributor advance springs
[Re: jbeintherockies]
#2702021
09/29/19 03:17 PM
09/29/19 03:17 PM
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Joined: Jan 2007
Posts: 953 Badham Co.
Y3 70 BEE
super stock
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super stock
Joined: Jan 2007
Posts: 953
Badham Co.
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The Mopar Performance springs are the ones they sold to put in a distributor, they are really light. Removing the heavy spring and just using the stock light spring usually works good for a street car.
Last edited by Y3 70 BEE; 09/29/19 03:19 PM.
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Re: Mancini vs Mr. Gasket distributor advance springs
[Re: jbeintherockies]
#2702045
09/29/19 06:15 PM
09/29/19 06:15 PM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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Can you please explain the table a little bit. Is it suggesting that my advance with the advance springs that come with a Mopar Performance distributor should provide all-in advance by 1100 rpm?
What is "point x" and what is "point y"? X is when the spring or spring combo starts advancing & y is when the particular spring or spring combo reaches full advance. EDIT I forget where I copied the chart from but yes it is sayin the MP combo would be all in at 1100
Last edited by RapidRobert; 09/29/19 06:17 PM.
live every 24 hour block of time like it's your last day on earth
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Re: Mancini vs Mr. Gasket distributor advance springs
[Re: RapidRobert]
#2702087
09/29/19 08:43 PM
09/29/19 08:43 PM
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Joined: Feb 2013
Posts: 141 Missouri
randavis
member
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member
Joined: Feb 2013
Posts: 141
Missouri
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Is that chart in distributor degrees or crank degrees. If dist degrees, then crank degrees would be 2200 for the MP springs which is what I seem to remember from the old catalogs.
74 Challenger, bought it new. In 1978 I replaced the original 318 with a 446 and 727. Mild cam, Jardine headers, and Holley Sniper EFI. New engine! 511" RB, Edelbrock Performer RPM heads, Eagle rotating assy, Comp hyd roller cam, Doug's 2" headers.
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Re: Mancini vs Mr. Gasket distributor advance springs
[Re: jbeintherockies]
#2702088
09/29/19 08:46 PM
09/29/19 08:46 PM
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Joined: Jan 2003
Posts: 11,993 Benton, IL.
DaveRS23
Special needs idiot
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Special needs idiot
Joined: Jan 2003
Posts: 11,993
Benton, IL.
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Our big blocks tend to like the advance all-in as quick as possible as long as it doesn't ping under load. Small blocks tend to be less picky. But you do not want the advance to begin until the RPM is above the idle. If it starts advancing while idling, you will be chasing the idle speed all the time, since the advance will be changing with engine speed especially when dropped in gear if an auto. For a big block, I like to try for advance to start about 1,000RPM and be all-in by 1,500RPM. Then check to be sure that there is no spark knock under 2,500RPM. And the more overlap in the cam, the more advance they like in the idle. Most of my big blocks (and my current Hemi) have 25* to 28* advance at idle. Basically, all I can get before it starts kicking back against the starter.
Master, again and still
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Re: Mancini vs Mr. Gasket distributor advance springs
[Re: DaveRS23]
#2702090
09/29/19 08:58 PM
09/29/19 08:58 PM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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thats what I was getting ready to comment on is that you dont want the springs to start advancing until several hundred RPM above the idle speed & someone said something about the center hole in the FBO plates to be to big possibly causing a problem (hanging up or inconsistent advance amt I would guess). I have several of em & I am going to check that out & maybe reduce the center hole ID but it is a good deal for the money.
live every 24 hour block of time like it's your last day on earth
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Re: Mancini vs Mr. Gasket distributor advance springs
[Re: randavis]
#2706484
10/13/19 08:05 PM
10/13/19 08:05 PM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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Is that chart in distributor degrees or crank degrees. crank
live every 24 hour block of time like it's your last day on earth
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Re: Mancini vs Mr. Gasket distributor advance springs
[Re: jbeintherockies]
#2706839
10/14/19 09:38 PM
10/14/19 09:38 PM
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Joined: Feb 2010
Posts: 1,645 Phila. Pa.
Mattax
top fuel
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top fuel
Joined: Feb 2010
Posts: 1,645
Phila. Pa.
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It may be a DC/MP vac advance distributor based on what I can see of the number. If so, its already got a pretty good curve in it. If you're dedicated drag racing, then the vac advance isn't needed and in that case, using a lighter primary spring may be an advantage. You'll then need to be sure there is enough initial tension so the advance is stable at idle speed. Leave the heavy spring installed. That's part of the secret of why the MP/DC distributor are better than most aftermarket. A heavy secondary spring normally is used to slow down advance as the rpms get into better combustion above roughly 2000. But it also is used to offset electronic switching time (slew rate). see https://board.moparts.org/ubbthread...ry-unilite-timing-issue.html#Post2488504If you're not dedicated drag racing, then work with the factory springs - especially if it is a DC/MP distributor. You can tweak the tension on the primary, and the engagement point on the second spring by turning the spring perch. If the advance is really too long - say because a long duration cam is being used, then weld a tack on the inside of the slots. File it and you're done. If its not a MP distributor, depending on the original application you may find a really long advance, like 30*. In which case, weld a tach and file it to length.
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Re: Mancini vs Mr. Gasket distributor advance springs
[Re: jbeintherockies]
#2707198
10/16/19 08:53 AM
10/16/19 08:53 AM
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Joined: Jan 2003
Posts: 11,993 Benton, IL.
DaveRS23
Special needs idiot
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Special needs idiot
Joined: Jan 2003
Posts: 11,993
Benton, IL.
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Yeah, with 4.10s, you will probably be able to be all-in much earlier than 3,000 without pinging. In fact, I would try all-in by 2,000.
Master, again and still
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