What timing are you running on your 512?
#2678092
07/16/19 09:51 PM
07/16/19 09:51 PM
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Joined: Aug 2003
Posts: 8,779 Mt.Gilead, Ohio
OhioMopar
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I finally have my 512 low deck in my Super Bee and I have started the tuning process. I've driven it around a little, put about 10 miles on it today without much issue. I'm curious what everyone sets their timing at on their combo? I know big block timing is normally most comfortable around 38 degrees, all in by 2500. I was also talking to someone that said the strokers like a little less timing. So far it hasn't given me the ride I expected out of a 512, so I'm ready to do some experimenting with the timing before I move on to the carb . It was starting hard and dieseling, as well as running hot and not idling. I've got it starting nice, idling well, but it still runs hot. 210 or so. I'm slowly getting it dialed in, (very slowly) but would like to know what has worked best for others with similar combos. Thanks. My combo real quick: '78 400 block, .040 over. 440 Source 4.25" stroke with ultra light crank. Dished pistons. Trick Flow 240 heads. Cometic head gaskets, 10.6:1 compression. Hughes roller rockers. Scott Brown solid cam .563/.555 lift, 248/258 duration @.050. Installed advanced 4 degrees. MP M1 single plane intake. Proform 1050 with 4150 base. MSD Pro-Billet distributor with a Digital 6AL box. Initial timing set at 17 degrees with the total set at 38.
1969 Dart GTS 340 1969 Super Bee X9 N-96 1969 Coronet R/T X9 N-96 2015 Dodge Dart GT 2019 Ram 2500 Big Horn. Looking for the original block for my Bee. The last 4 are 7449
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Re: What timing are you running on your 512?
[Re: merpar]
#2678119
07/16/19 10:54 PM
07/16/19 10:54 PM
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Joined: May 2004
Posts: 12,396 Taxes & Virus's R-US, NY
Dragula
I Live Here
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I Live Here
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We like 38*...We have run as much as 44*...It liked that too, but would ping on a hard launch when temp was over 170*
Last edited by Dragula; 07/16/19 10:56 PM.
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Re: What timing are you running on your 512?
[Re: merpar]
#2678120
07/16/19 10:55 PM
07/16/19 10:55 PM
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Joined: Aug 2011
Posts: 2,864 Pattison Texas
CSK
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24 initial, 35 total,,about 6 more ported vacuum advance.
1968 Charger COLD A/C Hilborn EFI 512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim 2020 T/A 392 Stock 11.79 @ 114.5
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Re: What timing are you running on your 512?
[Re: OhioMopar]
#2678145
07/17/19 12:31 AM
07/17/19 12:31 AM
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Joined: Feb 2003
Posts: 1,102 Massillon, Ohio
cudatom
super stock
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super stock
Joined: Feb 2003
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Massillon, Ohio
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Mine likes 34 total. Didn't pick up any at 36 and slowed down at 32.
Ok
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Re: What timing are you running on your 512?
[Re: Cab_Burge]
#2678149
07/17/19 01:18 AM
07/17/19 01:18 AM
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Joined: Oct 2012
Posts: 91 Calgary, AB
64Bel
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Then there's the 440/906 combo my dad has. 11.3:1, 565 cam, dist. locked at 40 and that's what it likes. edit: and that's on pump gas with a little bit of octane booster.
Last edited by 64Bel; 07/17/19 01:19 AM.
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Re: What timing are you running on your 512?
[Re: OhioMopar]
#2678169
07/17/19 07:01 AM
07/17/19 07:01 AM
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Joined: Aug 2003
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OhioMopar
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It looks like that for the most part 34 degrees is pretty common. Andy, vacuum advance is a problem... My distributor is lacking a vacuum canister.
1969 Dart GTS 340 1969 Super Bee X9 N-96 1969 Coronet R/T X9 N-96 2015 Dodge Dart GT 2019 Ram 2500 Big Horn. Looking for the original block for my Bee. The last 4 are 7449
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Re: What timing are you running on your 512?
[Re: OhioMopar]
#2678178
07/17/19 08:01 AM
07/17/19 08:01 AM
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Joined: Jan 2008
Posts: 1,213 Minn
SportF
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This topic comes up once in a while and as such, I took a poll at the drag strip two years ago. There was no mopar racers running a wedge that had it lower than 36. All racers I talked to were between 36 and 38. This was about 20 mopar racers. And most had all timing in between 1500 and 2K. I have asked this many times since then and its always the same result*.
Years and years ago a well experienced racer gave me some advice, "If everybody is doing it, its probably a pretty good idea".
As stated above, the time marks and the light may change things and every engine can be different. Good luck.
*One racer had his at 34 degrees, and he did this to slow it down. He still messes with timing to run his index.
Last edited by SportF; 07/17/19 08:03 AM.
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Re: What timing are you running on your 512?
[Re: OhioMopar]
#2678265
07/17/19 11:47 AM
07/17/19 11:47 AM
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Joined: Jun 2015
Posts: 150 It's Complicated
HDNMOPERS
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I have pretty close to your setup. 400/512 TF heads Solid FT 244*@50 .555 intake 252*@50 .563 exhaust with the LSA @ 112 with 10.3 comp M1 intake Thumper Carb 850. Next week were gonna fire it up and break the cam in on the run in stand. Had Don at FBO set me up vacuum advance dist. Not having the sheet in front of me. If I remember correctly. This is what he sent me. Initial 22* 34*total all in @ 3200 rpm 12* vacuum advance @ 10". Won't know how the vacuum advance curve works while doing cam break in. But if we get it on the dyno. Should be able to check it then.
Last edited by HDNMOPERS; 07/17/19 12:23 PM.
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Re: What timing are you running on your 512?
[Re: HDNMOPERS]
#2678268
07/17/19 11:53 AM
07/17/19 11:53 AM
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Joined: Aug 2003
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OhioMopar
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I'd be interested in seeing your results. I'm thinking I made a mistake putting a distributor without vacuum advance on it.
1969 Dart GTS 340 1969 Super Bee X9 N-96 1969 Coronet R/T X9 N-96 2015 Dodge Dart GT 2019 Ram 2500 Big Horn. Looking for the original block for my Bee. The last 4 are 7449
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Re: What timing are you running on your 512?
[Re: OhioMopar]
#2678272
07/17/19 12:03 PM
07/17/19 12:03 PM
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Joined: Jun 2015
Posts: 150 It's Complicated
HDNMOPERS
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Yeah me too. Will see. This will be 99% street car. With a occasional strip pass. So street manners is way more important to me. Shoot FBO a call. He may tell you vacuum would help or just get yours recurved.
Last edited by HDNMOPERS; 07/17/19 01:12 PM.
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Re: What timing are you running on your 512?
[Re: OhioMopar]
#2678334
07/17/19 02:56 PM
07/17/19 02:56 PM
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Joined: Nov 2015
Posts: 879 Missouri
jwb123
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I have posted it before but, get into the 21st century, engine programs are out there that will calculate the proper advance curve for what ever engine combination you have with what ever fuel octane you have. Are they 100% accurate, no, but they are close, at least in my experience. I use performance trends engine analyzer. As with all programs you have to take the time to input good info, if you do, it hits not only HP and Torque, but things like idle vacuum, timing curve, cranking compression, fuel volume requirements, and much more. I never build an engine without running it through the program. I get a lot of people who bring me a pile of parts to build an engine with, the program helps figure out if its a combination that will work, and helps convince them if it won't. Plus the program is a lot cheaper than a burnt piston, and fun to play with on a rainy day.
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Re: What timing are you running on your 512?
[Re: HDNMOPERS]
#2678337
07/17/19 03:09 PM
07/17/19 03:09 PM
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Joined: Aug 2003
Posts: 8,779 Mt.Gilead, Ohio
OhioMopar
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Yeah me too. Will see. This will be 99% street car. With a occasional strip pass. So street manners is way more important to me. Shoot FBO a call. He may tell you vacuum would help or just get yours recurved. Mine will also be mostly street, but I'm undoing some old advice I've adhered to over the years, i.e. that vacuum advance is for old ladies. I have an MSD pro-billet, so changing the advance curve and such is simple. However, 20 initial and 34 total isn't, so it looks like I'll be buying some bushings off the FBO site.
Last edited by OhioMopar; 07/17/19 03:45 PM.
1969 Dart GTS 340 1969 Super Bee X9 N-96 1969 Coronet R/T X9 N-96 2015 Dodge Dart GT 2019 Ram 2500 Big Horn. Looking for the original block for my Bee. The last 4 are 7449
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