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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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Mt.Gilead, Ohio
OhioMopar Offline OP
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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.


2016 Scatpack
1999 Dakota Sport
1969 Super Bee.
Looking for the original block for my Bee. The last 4 are 7449
Re: What timing are you running on your 512? [Re: OhioMopar] #2678104
07/16/19 10:25 PM
07/16/19 10:25 PM
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Nevada
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merpar Offline
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I've ran 451" it liked 34* total, running a 483 at 35* total had a 512and it liked 35*. So my experience they all seem to like 34-35 total timing. And that is running all on methanol.

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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Taxes R-US, NY
Dragula Offline
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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.

'71 Duster Pump Gas 512LD 2013 Mod Gas Winner GRS
https://www.youtube.com/watch?v=DNMPXgRryws (6.13) (9.68 at +137mph)

'70 Cuda, Plan C....605 Hemi
https://www.youtube.com/watch?v=WYw6RA-k5Bk (6.31)
https://www.youtube.com/watch?v=JCvfzsC4NgM (9.9)
Re: What timing are you running on your 512? [Re: merpar] #2678120
07/16/19 10:55 PM
07/16/19 10:55 PM
Joined: Aug 2011
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KATY TEXAS
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24 initial, 35 total,,about 6 more ported vacuum advance.


LINK TO MY STORY http://www.onallcylinders.com/2015/...s-to-build-brilliant-1968-dodge-charger/

512ci 9.7, Stealth heads, 3.54gear 4050lb,11.11 full street car trim.
Re: What timing are you running on your 512? [Re: csk] #2678124
07/16/19 11:08 PM
07/16/19 11:08 PM
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Alberta
Wookie316 Offline
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36 off a crank trigger


BARNEY the 71 Plum Superbee. 4100 at the line. B 512 with a Cope 727/ Ultimate 9.5” converter and a S60 with 4.10's out back! 10.10 @ 132.79 with a 1.36 60 Foot.
Re: What timing are you running on your 512? [Re: OhioMopar] #2678132
07/16/19 11:23 PM
07/16/19 11:23 PM
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Bend,OR USA
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All the iron headed motors I've tuned on the dyno and at the track like right at 34 to 36 max on both race gas and pump swill shruggy
BTW,, all of them would slow down with 33 and 37 total, which works well when your trying to slow the car down for a index. Retarding it is way safer than advancing them also up twocents
Aluminum headed motor may like more timing also, no two motors are identical, just like timing lights and timing marks, correct whistling
I like to retard the timing a little at a time until the car starts to slow down and then go the other way one degree at a time until it stops going faster and then split the difference to be safe work up scope


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: What timing are you running on your 512? [Re: Cab_Burge] #2678138
07/16/19 11:37 PM
07/16/19 11:37 PM
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Philadelphia
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radar Offline
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Mine on the dyno didn’t gain anything going over 34 at WOT. I’m at 15 cranking 23.5@ idle.

10.25:1, stealth heads, 240°s @.050

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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Massillon, Ohio
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Mine likes 34 total. Didn't pick up any at 36 and slowed down at 32.

Re: What timing are you running on your 512? [Re: OhioMopar] #2678148
07/17/19 12:54 AM
07/17/19 12:54 AM
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Oregon
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With the TF heads and that cam I'd start with 20 degrees initial and 34 total. For street driving you'll need some vacuum advance. The Trick Flow heads will get super hot at part throttle unless you give them some advance. If I was programming a curve I'd put 40 degrees at cruise and light throttle.

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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Calgary, AB
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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.
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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Mt.Gilead, Ohio
OhioMopar Offline OP
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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.


2016 Scatpack
1999 Dakota Sport
1969 Super Bee.
Looking for the original block for my Bee. The last 4 are 7449
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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Minn
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SportF Offline
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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.
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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TN
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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.
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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Mt.Gilead, Ohio
OhioMopar Offline OP
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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.


2016 Scatpack
1999 Dakota Sport
1969 Super Bee.
Looking for the original block for my Bee. The last 4 are 7449
Re: What timing are you running on your 512? [Re: OhioMopar] #2678272
07/17/19 12:03 PM
07/17/19 12:03 PM
Joined: Jun 2015
Posts: 94
TN
HDNMOPERS Offline
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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.
Re: What timing are you running on your 512? [Re: OhioMopar] #2678288
07/17/19 12:53 PM
07/17/19 12:53 PM
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flint michigan
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400/511 11.3:1, 270@50SFT .650 , MW Edelbrock looks to have same chamber design as the 440-1 by Indy. Reading my plugs mine likes 35*-37* total. Have a short curve in it with 31* initial 36* total and all in by 2500. Havent ran it yet to see what it wants exactly. This is 99% street driven.

Re: What timing are you running on your 512? [Re: mopar dave] #2678297
07/17/19 01:16 PM
07/17/19 01:16 PM
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So Near, Yet So Far
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Another vote for FBO. Swapped their vac-advance distributor with their clever plate into the 512 I had, 20 initial max 36, cleaned up the plugs a ton from the previous mech adv setup.
Drove nicer too.

Re: What timing are you running on your 512? [Re: OhioMopar] #2678321
07/17/19 02:29 PM
07/17/19 02:29 PM
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Romeo MI
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My advice.. start advancing the timing you have a temp issue first..
wave

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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Missouri
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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.

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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Mt.Gilead, Ohio
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Originally Posted by HDNMOPERS
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.

2016 Scatpack
1999 Dakota Sport
1969 Super Bee.
Looking for the original block for my Bee. The last 4 are 7449
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