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Light weight advance springs for Dist #355970
06/23/09 07:36 PM 06/23/09 07:36 PM
Joined: Sep 2003
Posts: 314
North East Missouri
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express Offline OP
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I have a 79 Lil Red Express 360 stock. I have some Mopar dist springs I bought 25 years ago. Both of the new springs are lighter than the lightest one in the dist now.

These seem awful light to me, will these work better that stock or not.?

Stock has one light & one heavy spring.
thanks, Doug

cny25421@centurytel.net 70 Duster Turbo Charged 79 Lil Red Express Bonded Locksmith
Re: Light weight advance springs for Dist [Re: express] #355971
06/23/09 07:41 PM 06/23/09 07:41 PM
Joined: Jun 2004
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wilmington,ohio
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ohiodemon Offline
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probably the best thing you can do is put them in and try it out.
set your initial timing where you currently have it.
Re: Light weight advance springs for Dist [Re: express] #355972
06/23/09 08:27 PM 06/23/09 08:27 PM
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Lincoln Nebraska
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RapidRobert Offline
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Quote:

Stock has one light & one heavy spring.
thanks, Doug

I'd keep the light one, toss the heavy one & add one of your MP light springs

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Re: Light weight advance springs for Dist [Re: express] #355973
06/23/09 08:32 PM 06/23/09 08:32 PM
Joined: Nov 2007
Posts: 5,337
the house on the left.
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cogen80 Offline
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the house on the left.
keep the lighter spring thats in the dist now. and replace the heavy spring with one of the ones you bought 25 years ago. should bring total timing in about 2200 +/- rpm.
Re: Light weight advance springs for Dist [Re: cogen80] #355974
06/24/09 06:27 AM 06/24/09 06:27 AM
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nielsville, minn.
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quickd100 Offline
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Just remove the one heavy stock spring and leave that slot blank. With one factory lite spring your total advance should be all in around 21-2200rpm. Those real lite aftermarket springs will be all in around 1100rpm. Dave
Re: Light weight advance springs for Dist [Re: quickd100] #355975
06/24/09 09:44 AM 06/24/09 09:44 AM
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North East Missouri
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express Offline OP
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Thanks guys, that's what I will try.
Thanks Robert for the chart too! Man when does the stock springs go to full advance Must be 2800 with size of that spring!

cny25421@centurytel.net 70 Duster Turbo Charged 79 Lil Red Express Bonded Locksmith
Re: Light weight advance springs for Dist [Re: express] #355976
06/24/09 11:53 AM 06/24/09 11:53 AM

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I use the real light Mr. Gasket springs part # 925B.

Full advance is in by 1200 or so.

Works great on the street.
Re: Light weight advance springs for Dist #355977
06/24/09 12:25 PM 06/24/09 12:25 PM
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Posts: 279
pgh pa
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captaindodge Offline
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I run no springs in my '69 440 r/t for over a year now with no problem and the timing light is steady.

Re: Light weight advance springs for Dist [Re: express] #355978
06/24/09 03:01 PM 06/24/09 03:01 PM
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Lincoln Nebraska
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RapidRobert Offline
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Quote:

Thanks guys, that's what I will try.
Thanks Robert for the chart too! Man when does the stock springs go to full advance Must be 2800 with size of that spring!

The other springs listed are in a Crane kit that is no longer available but I'm sure nowadays there are other springs available(MSD??). yes the stock setup w the light spring and the heavy one w the long loop it'd be lucky to be all in by 2800

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Re: Light weight advance springs for Dist [Re: RapidRobert] #355979
06/24/09 05:51 PM 06/24/09 05:51 PM
Joined: Jan 2003
Posts: 1,069
Washington State
70Duster440 Offline
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I don't mean to hijack this thread but it raises questions. Everyone's always talking about having their total timing all in by 2500 rpm or thereabouts. When Don at FBO set up my distributor, mechanical doesn't start until about 2200 and is all in by 3400. (Of course, with the vacuum advance, it does start advancing at lower rpms).

Question is, why pick one rpm level as your target total over another? What advantage would I have with my total (34*) in by 2500 vs. 3400?
Re: Light weight advance springs for Dist [Re: 70Duster440] #355980
06/24/09 09:41 PM 06/24/09 09:41 PM
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Lincoln Nebraska
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RapidRobert Offline
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Quote:

I don't mean to hijack this thread When Don at FBO set up my distributor, mechanical doesn't start until about 2200 and is all in by 3400. (Of course, with the vacuum advance, it does start advancing at lower rpms).
Question is, why pick one rpm level as your target total over another? What advantage would I have with my total (34*) in by 2500 vs. 3400?

Not a hijack at all, that is a legitimate Q. You want as much advance as it will take wo pinging at any rpm/load/temp and engines can have full adv wo pinging in the 2500 range(or sooner). Those #'s(2200-3400) dont sound right

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Re: Light weight advance springs for Dist [Re: RapidRobert] #355981
06/25/09 12:47 AM 06/25/09 12:47 AM
Joined: Jan 2003
Posts: 1,069
Washington State
70Duster440 Offline
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Washington State
Quote:

Quote:

I don't mean to hijack this thread When Don at FBO set up my distributor, mechanical doesn't start until about 2200 and is all in by 3400. (Of course, with the vacuum advance, it does start advancing at lower rpms).
Question is, why pick one rpm level as your target total over another? What advantage would I have with my total (34*) in by 2500 vs. 3400?

Not a hijack at all, that is a legitimate Q. You want as much advance as it will take wo pinging at any rpm/load/temp and engines can have full adv wo pinging in the 2500 range(or sooner). Those #'s(2200-3400) dont sound right



The dizzy was tagged with the specs and I have verified them (total timing @ rpm). Just don't know why he chose them. (And if you've ever tried to talk to Don, well, you know it's a challenge). Maybe I need to experiment. If it will make for snappier response on the street, I'm for it. Thanks.
Re: Light weight advance springs for Dist [Re: 70Duster440] #355982
06/25/09 08:05 AM 06/25/09 08:05 AM
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Lincoln Nebraska
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RapidRobert Offline
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You have no mechanical adv until 2200 rpm? just off of idle as the rpms climb you would need the spark to start advancing & I had an eng I was playing with & I used one of those I believe lean burn dizzys w no adv & it got way hot fast from the retarded timing in the driveway just from goosing the throttle. I had a ph conversation w Don @ FBO & it went real well and I even get along w Dave Hughes

Last edited by RapidRobert; 06/25/09 07:35 PM.
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Re: Light weight advance springs for Dist [Re: RapidRobert] #355983
06/25/09 12:41 PM 06/25/09 12:41 PM
Joined: Jan 2003
Posts: 1,069
Washington State
70Duster440 Offline
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Washington State
Don's a better talker than a listener - at least in my experience. Yes, mechanical starts pretty late. Vacuum, a few hundred off idle (don't recall the exact rpm).
Re: Light weight advance springs for Dist #355984
06/25/09 06:39 PM 06/25/09 06:39 PM
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Balt. Md
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383man Offline
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Quote:

I use the real light Mr. Gasket springs part # 925B.

Full advance is in by 1200 or so.

Works great on the street.



Same here as the Mr Gasket springs work great on my combo. I like a quick advance as long as it don't ping. Helps the low end. Ron
Re: Light weight advance springs for Dist [Re: 383man] #355985
06/25/09 07:41 PM 06/25/09 07:41 PM
Joined: Jan 2003
Posts: 1,069
Washington State
70Duster440 Offline
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Washington State
I ordered the #925B kit - which is supposed to be rated at 2000 - 2800 rpms. It will be here tomorrow.

Not sure if I should throw them in or mix and match with what I have. Right now there's a black and a silver and they're bringing mechanical in late.

5315154-DizzySprings.jpg (83 downloads)
Re: Light weight advance springs for Dist [Re: 70Duster440] #355986
06/25/09 07:55 PM 06/25/09 07:55 PM
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Lincoln Nebraska
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RapidRobert Offline
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The black one looks heavier, I would R&R it w (1) of the mr gasket ones & see what you get.

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Re: Light weight advance springs for Dist [Re: RapidRobert] #355987
06/25/09 09:22 PM 06/25/09 09:22 PM
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Taneytown, MD
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bigslant6fan Offline
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Just remember every one,The MP distributors built in the last 5-10 years have a Mallory style advance mechanism (like 70 duster,s).The correct kit is MP#P5153446.Springs intended for the older OEM distributors may work but the calibration chart may be off-I,ve never tried it,but I,m just mentioning it. I sell a spring kit for the older dists.with four different rates for $25.
Re: Light weight advance springs for Dist [Re: bigslant6fan] #355988
06/26/09 07:06 AM 06/26/09 07:06 AM
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Pittsburgh, Pa
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Jeff_383 Offline
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A little off the post, sorry, but the MP Mallory unit says it's max advance is 28 degrees. What do you have to do to get 35-36 out of it (mechanical)? Sorry if this is a easy answer, but I'm not that versed in distributors.
Re: Light weight advance springs for Dist [Re: Jeff_383] #355989
06/26/09 07:55 AM 06/26/09 07:55 AM
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Lincoln Nebraska
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RapidRobert Offline
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Quote:

the MP Mallory unit says it's max advance is 28 degrees. What do you have to do to get 35-36 out of it (mechanical)?

35-36 is a total amount(initial + mechanical) checked with the vac adv unhooked/plugged.

live every 24 hour block of time like it's your last day on earth
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