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Advance curve in a Hemi Distributor #2788408
06/23/20 10:40 AM
06/23/20 10:40 AM
Joined: Dec 2007
Posts: 391
kansas
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farmboy Offline OP
enthusiast
farmboy  Offline OP
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kansas
Using a MSD distributor in a 433 Hemi, Stock crossram, small roller cam, mostly street 4 speed car. What would be a good advance curve and timing for this application. Lots of different choices with the MSD distributor. TIA

Re: Advance curve in a Hemi Distributor [Re: farmboy] #2788424
06/23/20 11:32 AM
06/23/20 11:32 AM
Joined: Dec 2005
Posts: 1,494
Shelby mi.
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JAKE68 Offline
pro stock
JAKE68  Offline
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Posts: 1,494
Shelby mi.
I WOULD START WITH ABOUT 15 INITIAL AND 32 TOTAL ALL IN ABOUT 2000 RPM


JAKES AUTOMOTIVE
Re: Advance curve in a Hemi Distributor [Re: farmboy] #2788427
06/23/20 11:36 AM
06/23/20 11:36 AM
Joined: Feb 2014
Posts: 1,695
central il.
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second 70 Offline
top fuel
second 70  Offline
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Joined: Feb 2014
Posts: 1,695
central il.
My Hemi is locked out at 34 and starts fine. It would love more for cruising but 34 is the most it wants WOT. You would need vacuum advance or new programmable MSD to pull timing as rpm's increase.

Re: Advance curve in a Hemi Distributor [Re: farmboy] #2788440
06/23/20 12:25 PM
06/23/20 12:25 PM
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Posts: 43,007
Bend,OR USA
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Cab_Burge Offline
I Win
Cab_Burge  Offline
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Bend,OR USA
Put the black bushing in and the lightest springs and set the total timing above 3000 RPM at 34 degrees and go have some fun up wrench twocents
You should have between 14 to 18 degrees at idle speed so it will start and idle good also scope


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Advance curve in a Hemi Distributor [Re: Cab_Burge] #2788465
06/23/20 01:39 PM
06/23/20 01:39 PM
Joined: Dec 2007
Posts: 391
kansas
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farmboy Offline OP
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farmboy  Offline OP
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kansas
Did just that, and I have a happy little engine now. Thanks guys

Re: Advance curve in a Hemi Distributor [Re: Cab_Burge] #2788468
06/23/20 01:41 PM
06/23/20 01:41 PM
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Posts: 8,192
fredericksburg,va
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cudaman1969 Offline
master
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Posts: 8,192
fredericksburg,va
My buddy’s 528 Barton Hemi was recommended at 30 total. We ran the old iron engine at 37, seemed to like it the best. Very light spring for start up then full at 800. The more advance the better the grunt and responsive down low

Re: Advance curve in a Hemi Distributor [Re: cudaman1969] #2788487
06/23/20 02:32 PM
06/23/20 02:32 PM
Joined: Dec 2013
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Wichita
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GY3 Offline
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Wichita
I'd happily talk to you about jetting but we know how that goes. grin


'63 Dodge 330
11.19 @ 121 mph
Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs.
10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.

Re: Advance curve in a Hemi Distributor [Re: Cab_Burge] #2788504
06/23/20 03:29 PM
06/23/20 03:29 PM
Joined: Mar 2005
Posts: 1,581
N/E, Michigan
RATTRAP Offline
pro stock
RATTRAP  Offline
pro stock

Joined: Mar 2005
Posts: 1,581
N/E, Michigan
Originally Posted by Cab_Burge
Put the black bushing in and the lightest springs and set the total timing above 3000 RPM at 34 degrees and go have some fun up wrench twocents
You should have between 14 to 18 degrees at idle speed so it will start and idle good also scope



iagree 100%

Re: Advance curve in a Hemi Distributor [Re: farmboy] #2788624
06/23/20 08:12 PM
06/23/20 08:12 PM
Joined: Jan 2003
Posts: 11,890
Benton, IL.
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DaveRS23 Offline
Special needs idiot
DaveRS23  Offline
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Joined: Jan 2003
Posts: 11,890
Benton, IL.
On the dyno during break-in, my 540 liked 31* total. And I like as much initial as it will take until it starts to kick against the starter. The bumpier the idle, the more initial it likes. Right now, I think it is 25* initial and all in by 1,800.


Master, again and still
Re: Advance curve in a Hemi Distributor [Re: DaveRS23] #2788728
06/24/20 08:11 AM
06/24/20 08:11 AM
Joined: Jan 2003
Posts: 13,319
Marion, South Carolina [><]
an8sec70cuda Online content
I Live Here
an8sec70cuda  Online Content
I Live Here

Joined: Jan 2003
Posts: 13,319
Marion, South Carolina [><]
My 575" hemi likes 34°. I have it locked out and no trouble w/ starting. Idles better locked out too.


CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax






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