Stock 318 initial timing problems. At 5,500 feet elevation and 9.

Stock 318 initial timing problems All you guys seem to run a lot of initial timing with good results, don't see why my car would be any different. make one adjustment at a time from there. Home. Thread starter Jimbo6954; Start date May 4, 2021; Tags 1986 d150 318 (at 3500 RPM) which turns out to be about 14 BTDC at idle. If you have a decent 4bl carb you could probable get 10 or 12 out of it. Readjusted idle-mixture screws for maximum vacuum and RPM readings. P. You can verify all that with a Here is something to consider. neura Discussion starter. Stock 1972 Dart 318 timing. BUT setting timing THERE can affect the base initial timing. SHARE POST #14. lol Motor is a '74 mild build 318 with stock bottom, KB pistons, Mopar purple cam (dont know specs, bought the motor pan to carb complete from a third party) stock 74 318 heads with over size 360 valve Rework the distributor so you can put sufficient initial timing on the engine. It's beneficial for allow the ECU to control the ignition timing. 10+ is where you want to be as stumblin horse is running. For a factory engine, the factory timing is going to be darn 318 Ignition Timing HELP Performance Talk : Moparchat - Home of MOPAR enthusiasts worldwide! > Technical Forums > I kept detailed records for initial timing, mechanical advance, total advance and mileage. I was driving to pick my wife up a few days ago, the truck started running like it was way too advanced, it was detonating when i gave it gas from a stop and running great on the highway, i had to drive about fifteen miles The engine has the tunnel port heads and 2 X 4 intake, Lunati roller, Dove roller rockers, smith bros push rods, and an Accel distributor. Welcome to hot rodding . Did initial timing by ear and set it so it idled nice and sounded good. /ret. 030 with KB pistons ~9:1 compression Indy LAX heads TTI shortys, full exhaust Eddy air 106°) Trans: Rebuilt 727, shift kit, stock converter Rear-end: 8. Now with a basically stock 318, I would like to ask what total timing some of you out Do you guys find when you get the timing just where you want it and proceed to tighten the hold-down nut on the distributor bracket that it moves the timing? Is that something normal? Do I have something out of spec? If not, Initial timing is the base amount, and affects idle power and smoothness. Re-cored big stock 74 dart swinger 318 radiator and stock shroud, 4 blade non-flex direct drive cooling fan, gutted thermostat. Jump to Latest 87 D100 318 auto. Hello guys. Vac can makes my grand total cruise timing right at 52 degrees. I have it set at 34 degrees total now. If it must be changed, merely loosen the hold-down nut and Hello guys, trying to dial in my timing but there are no marks Ive adjusted by ear but would like a pic of a dialed in 318 @12 degrees or even close would be a big help. And what is a suggested non stock total timing range? I understand all builds would differ. Stock Magnum Timing Chain? Krooser: Circle Track Chat: 1: 07-30-2013 06:15 PM: Wanted. Proceed with normal timing checks on mechanical and vacuum advance. 512 lift. The consensus seems to be 16 degrees initial timing and total timing of 38 degrees. 5 degrees. 15 initial on ported would be a good start. 3--As one of our other members said, the rotor can point to China so long as it points to Here's my 2cents; Your "initial timing" needs to satisfy idle requirements and that is all. Total timing 28 to 34 degrees. The initial timing must be set manually. Joined Jul 1, 2018 Messages 8 Reaction score 0 Location Boise Idaho. Local time 87 D100 318 auto. New posts Recent Posts Classifieds Search forums. ECU controlled timing is preferred (because there are many ECU parameters/features that function off of the timing control), and use the MSD CD ignition box for increased spark energy. but what should my vacuum advance be adjusted to? Now to keep this ball rolling, im gonna start another thread on initial timing, and my specific case, It’s important that the engine be idling at its warm-idle rpm. You might try Mopar Performance, I haven't looked thru one of their catalogues in awhile. New posts New articles New profile posts New article comments Latest activity New showcase items. I'll see if we can figure out a way to limit some of the timing problems you have with too much Don't know anything about the engine really but is suppose to have a small Rv type cam with stock heads and I'm . I've read a lot of posts and articles on here and elsewhere about initial timing on a SBC. jp253 Member. Jump to Latest Follow Total initial + mech advance of 36 is generally considered good and safe for most engines. Timing that is set outside the parameters of the capability of the engine may cause severe damage to the engine. Initial timing - 15-16 degrees BTDC Mechanical - adds about 17 degrees, in by about 2000 rpm, total of about 32 degrees 41-629, and I decided to gap them at . Thanks! See Unplug my vacuumed advance, plug the hose end and set my initial timing to is need. The timing procedure for the 318 is similar to that of the other Chrysler "LA" series engines. Thread starter toddlaine; Start date Mar 21, 2012 - toddlaine Well-Known Member. I put timing tape on my HB. Electric fan on a manual switch, 180 deg. ) until I bumped the initial timing up. Return to curb idle and rehook vacuum line to port at carb. Adjust the cars reaction and performance per the fuel you use everyday. The stock spec for a '71 318 is + or - 2. which is basically the same thing as the marks on your HB. This engine is super high compression, though. With vacuum attached, raise RPM to 3500, now timing should be between 50 & 55 degrees. I am using a stock HEI ignition. I can get the engine to idle with 18 degrees initial timing but it is rough and stalls when ever shifting from park to reverse or drive. I first set the distributor by ear to idle smoothly and then connected a timing light. Take special note that the 0 degree timing is set at 500 RPM with the trans in DRIVE. Finally gave up and advance the initial timing to the highest manifold vacuum, hence 24 degrees. Too much initial timing + bottom line octane (87) will cause your problem. Then you want the mechanical to add no more than 20, for a total of 36 max. This is the engine; 318ci, bored . Alikazam #379927 April 22nd 2010 6:10 am. I'm tuning everything again after rebuilding my 1806 carb and I've BAD advice to "let the initial timing fall where it will". More of a "hot rod" thing, rather than a "stock" thing. No issues when driving on hwy. The initial is determined by what gives you max manifold vacuum. They Currently the car is a 73' Duster Twister with a stock 318 with stock exhaust manifolds and stock 2bbl intake manifold. DONE. SB Timing gear. this is what its supposed to do, it will only do this at high vac condition like idle. stock Calling an illegal alien an 'undocumented immigrant' is like calling a drug dealer an 'unlicensed pharmacist' I asked this same question in the past and one member told me the had their 318 almost up to 20* without issue. thermostat, new water pump, 3 year old champion alum. But if the rpm decreases, then retard the timing to find the highest rpm , less than 750. Have someone raise the RPM to 3500, timing should be about 36*. The only time the car runs hot is when idling in traffic and when idling to set timing/idle mixture. "The book" shows how to insert the intermediate shaft, that is the drive gear/ oil pump drive, and if done properly, everything comes out "OK" THE REASON it is originally done that way is so the assembly line folk can wrench, repeat so the plug wires First let me say I have not owned a timing light since 1978 but will pick up a basic one today. Got it idling nicely but as soon as I put it into gear (727 Auto) it dies. Thread starter 66belvedere318poly; Start date May 28, 2014; May 28, 2014 #1 6. This is how a stock 318 should work. 34 degrees is the spec under heavy throttle with little to no vacuum. --B-300-- ive had a 83 truck with the 318 and it llasted all those years but if your having problems get it replaced because itll be a lot cheaper to replace the timing It don't matter what the chain is like, where the timing chain is, tooth off, stretched or on the floor, Tab indicates TDC and that's been verified by piston stop test. Initial timing should have zero effect on highway cruise temp. Now we're talking about 18-24 initial haha! Of course my stock 307 was a completely different engine too. Started out at 10* ATDC, I put it all the way to 12* BTDC If you have an early timing cover (marks on the passenger side) with a later damper, or later timing cover (marks over on the driver's side) with an early damper, then the timing marks are gonna be waaay off. For better performance and an increase in emissions, the timing can be increased. Thread starter videoword; Start date May 10 the throttle plates should close just enough that vacuum is no longer present at the timed port. For some reason, the Typically I've seen 32-36 degrees total timing on mopar small blocks (moparts. Initial timing-Start with a COLD non-running engine. Someone give me a timing tab and im not sure if its the right one. 54 posts I'm looking for the manufacture recommended specs regarding Ignition Timing on a 1968 318 LA. Jump to Latest Hello I am new to the forum, I have a 1987 D150 with a 318 and a 727 behind it. Runs good. However, as modifications are made, and emissions aren't an issue, timing curves can be modified. 84 D150 318 Timing / Fuel Issues. That means you likely need to shorten the mechanical advance Brief history, on initial fire up we had some fuel and timing issues. Click for a larger view. I bought a used Have been chancing my tail on my 318 engine not running correctly. , cam-lifters-p-rods n rockers. Your Power timing is just that. 3,681 57. Certain engines may accommodate a little more depending on how they are built, altitude, gas quality, etc. Definitely swap the timing set out for a good double roller set A. Leave your timing backed down where you have it now and run 93 octane. Just trying to get an idea of where it should be when Timing issue 318. stock Calling an illegal alien an 'undocumented immigrant' is like calling a drug dealer an 'unlicensed pharmacist' Save Share Like. Try a few different settings by locking it in then taking it on the road for Has anyone here ever seen a engine run with 35 degrees initial timing? Broke in the new cam on 318 after break in i was checking stuff, timing was at 35 My 273 bracket racer was set up for 35 degrees BTDC total timing (I think that was recommended back in the 1970's for a Mopar small block. My question is to learn the purpose of what I did. Any assistance on where I should start looking for the issue? Thanks in advance. Have fun, Mark 1999 Dodge 3500 CTD 4x4 1987 Dodge RC 318 4x4 Engine problems stock 318 2 bbl. Bad Banana, Oct 24, 2011. . When I received my timing light, I checked my initial timing and it was around 22 degrees btdc. Im dealing with timing problems right now, and Im set to 8deg initial. So i've got this 318 I bought non running. Likes: 25. Because the 318 was in production for so the timing was set about 30 deg. Possible the shroud is packing air, restricting flow? Could also be really lean. You could set the initial with the vac gauge method then shorten the slots to get 35 total (initial+slots "The thing" about timing traditional V8 engines. Finally got it going and when setting timing by vacuum gauge it likes ~30 degree BTDC initial and like 45 all in. thanks, Wagonman 1973 340 with stock iron heads, auto (unknown cam but very aggressive) Unknown compression >10:1; New ignition system > MSD billet dizzy with an 6AL box coil; Initial timing 20 degree's (idles much better here than at 15 degrees) All in by 2800 or so at 40 degree's (sounds fine with no load) Pump gas 93 max The timing for it stock says 4 BTDC. S. Jul 21, 2013 Stock, the initial advance was 5 degrees, with a total of around 26 degrees coming in at 3,200 rpms (or so). The issue you're describing sounds more like the choke to me if it's an electric choke and not the one that uses the heat from the ex man. The 23* is closer to what I would run. 9 stock short block, Engine Quest CH318B heads with 1. Vacuum levels at idle with a stock or very mild cam should be 17"-19". So I set it So it appears that I need to add 10° initial timing to get to 34°. I normally run 87 fuel. Timing light says spark is at 35 initial and 60 total off the crank. 3 row radiator 318 ignition problems. Timing should not be far above 15*. 042 spark gap. My total timing is 52* at 3500 RPM and initial is about 12* at 850 RPM. I also have an issue with one of the spark plugs (#7) being very close to the stock cast exhaust manifold. Strange timing issue - '68 318. 21 Gears Rev-n-nator MSD blaster 2 coil Initial timing set around 15° Also running a Summit distributor _____-I have checked I'e got a 4bbl edy n performer intake n petronix ignition what' a good initial timming I'm getting hard start when hot I've put the recommnded carb spacer Home. At 5,500 feet elevation and 9. Had a well known Mopar engine rebuilder[Wayne Hyrowick] rebuild my engine ,Keith Black #167 pistons, . 318 Poly timing tab and timing marks. I know that Chrysler calls for initial timing at TDC for this engine in stock form. Jun 22, 2021 #3 Daniel Anderson Member. I have a 1973 318 with similar symptoms. Had a few setbacks. I am generally not to concerned with initial timing but the total timing is way more than I feel is safe. A. Either way, it will take a couple of tank full's of gas before you will see any improvement. I’m trying to compare several things and for the life of me I cannot locate the original recommended timing from Chrysler. Joined I set initial timing at 14deg and with vacuum disconnected and plugged I got 37deg all in at 3300RPM and with vacuum connected to ported, total was 54deg. Chrome timing cover: 68cuda92stealth: Rear Wheel Drive - Parts Wanted: 3: 01-08-2008 12:43 AM: Stock gas tank (in stock position) with drop sump: drag-n-cuda: Performance Talk: 1: 04-14-2004 11:17 AM: Pure Stock, Street Stock, Bomber Dodge Just wanting to make sure when I go back together I won't have problems dialing the timing in. Took the 84 engine out, put in 77 truck engine with 84 Dist. If you modify the distributor so it has less mech advance, then you can have the 32 degrees total timing that most vortec headed motors like and a more reasonable initial timing setting. This will also result in you needing to change the In my case I run about 16 deg initial timing and 34 deg total timing. I'm just trying to narrow in on With the marks lined up per the instructions, the dials can be set based on the timing profile described in the instruction booklet. i can get the initial idle and timing to around 15 BTDC,1200 RPM, and am pulling somewhere between 25 and 30 vac. and total timing checked with timing light. If your maximum mechanical advance is closer to 18*, then an initial timing of 14* will produce a total timing of 14 + 18 = 32*. 2 Consider that the baseline initial and timing curve. Just to give you guys something back: I asked a comp cams tech the same question, he came up with: "I would recommend idle timing between 8 and 14 degrees advance and total timing at 30-34 degrees advance. This popping through carb means your intake valve is 318 Stalling Problems HELP! Thread starter blevins2005; Start date Jul 1, 2018 - B. I attempted to fire the 318 magnum for the first time on yesterday. When under throttle, about 2000 rpm, it jumps up to about 40 degrees advance. If it starts when hot at 23, run it. Also where can I get a reliable quality new ignition module? Unless you get lucky you will probably have to go aftermarket. May 2, 2011 #3 sheetmetaldan Well-Known Member. After last rebuild it had a Winters intake 318 Problems. controle module i will add to the system. The timing chaim is out of the equation, degreed cam is out of it, a Tooth off, 180* off none of that matters. Use a timing light with vacuum advance disconnected. You might even back it down a couple of * and try adding some octane booster. Upon initial start, the timing marks align at TDC and then it will creep up to about 20 degrees advance at idle. (vac advance is plugged for now). set where you want initial timing. I have a dial timing light, an rpm meter and a vacuum gauge. blevins2005 Member. 25, 3. Turns out a "happy" INITIAL timing (vacuum advance disconnected) is about 28 degrees BTDC, which seems very My 318 Duster ran like crap when I first got it (backfiring, stumbling, stalling, etc. Joined Nov 29, 2018 Posts 40 Reaction score 2 Location Nipawin, Saskatchewan, Canada Car: 1974 Dodge Dart Swinger Engine: 318 Bored . My original post i was asking where i should set the timing at for a basic stock 318 2 barrel 904 automatic duel exhaust. Check out this Chrysler 318 Engine from Mopar that is equipped with parts from Edelbrock, Holley, and Engine quest, as this beast gets over 400 hp inside Popular Hot Rodding Magazine Generally Mopar small blocks (LA and Magnum) like 10-16* initial timing and no more than 35* overall. We set an initial timing of 10 degrees with a total mechanical advance of 34 degrees, these are standard settings for a street driven vehicle that sees little-to-no track time, like our Dart. 5'' dual exhaust and a high flow air filter housing, with deleted vac lines and intake heater from the exhaust manifold. I'm assuming this is a vacuum leak? It's a stock 318 with Edelbrock 4bbl intake a Edelbrock carb. Find the timing mark on the vibration damper (the big round wheel about 1 inch My son has a 1978 dodge w150 with 318 2 barrel 727 transmission fully stock no mods except cherry bombs and all emissions have been removed. Initial on most ford FEs ran best around 12-14*, and total of 38*. then watch for marks and bring them up NOT on TDC but rather WHERE IT IS THAT you want the intial timing, say, 8-10BTC with a dead stock cam, 10-15 BTC with a hot cam. Before it happened to me, I had to run almost 14* initial advance to keep it from backfiring and stumbling badly. With the hot bade initial timing set, you can then reconnect the vac advance line to the ported vacuum port on the carb. What I have: Mopar LA 360 it has a 9. I have problems timing the engine. 30 over , Hastings Piston rings, 30 over, If the timing chain looks to be ok, set the initial timing with vacuum advance disconnected. That is just initial timing to get you I wouldn't run that engine/camshaft combo at 12* initial. Brooklyn Park, Maryland In production from the early 1960s to the early 1990s, the Chrysler Corporation's 318 cubic-inch, V-8 engine is found in all domestic Dodge and Plymouth cars and trucks. Mar 21, 2012 #1 What should I set my initial timing to? I Just bought a timing light and this is my first try at this. It has the 318 Link To eBay Motors. The initial timing is off the scale of the balancer, somewhere around 30-34 degrees. PROCEDURE Step One Determine the base line of the settings that affect timing and write them down. This does NOT apply to some V6s (even/odd fire) and some 4 bangers. A stock mechanical advance often comes in slowly and not reach 20 until 3000 rpm or more. So I'd start there. With the vacuum advance canister disconnected and vacuum source port plugged, the initial timing is set to 15* BTC - total timing kicks-in @ 2600-3000 RPM's, and now at 33* BTC. Above 36 you would just need to experiment and see if you can avoid detonation and pinging. If you have a timing light with the advance knob, you adjust the knob until the timing mark reads zero on the pointer, then read the timing at the knob. Jul 1, 2018 I have gotten everything together You can generally run initial timing as high as 16 BTDC without any issues on a relatively stock engine. Thread starter sheetmetaldan; Start date May 1, 2011; May 1, 2011 #1 In some cases you can go much higher with the initial but witht he stock 2bbl and distributor that may give you fits. (someone stuck 4 BIG diameter pushrods indumbass thought motor was toast ) Edelbrock 318/360 intake, 1406 carb. Electric choke - you shut the car off, next time you start the car, there's not enough fuel in the line to get it going, but, step on the gas pedal, the choke closes and if the engine's warm it's getting too much fuel in the mixture. If you The timing chain in my '70 318 jumped a couple months ago and it SUCKED, to put it lightly. I found a smaller Revisit Chrysler 318 timing suggestions. 6 to 1, heads are GT40P with stock valve sizes, no porting, but Manley stainless valves and GT40 valve springs and keepers. What do the rest of you stock class mopar oval track guys run for total advance ignition timing? I seem to run hot right now at 230 after the feature. Here is how I would do this with one of my units. " You're not too far off from the stock specs Initial timing was 6* and total centrifugal advance was 20 CRANKSHAFT degrees at 4,000 CRANKSHAFT rpm, or 26* total, with a maximum advance limit of 28 CRANKSHAFT degrees. Back the timing off, less advance. If the rpm goes up, you are on the right track. Thread starter jp253; Start date Jul 21, 2013; J. Thats an issue if your running 308-331 gear because the motor wont be at enough rpm untill the motors turning approx 3200rpm when the cars going at least 70-75 mph & thats with 14" tires Hi Guys, Looking for some assistance in tuning my LA 360 short block. R150-250 is 11 BTDC. But, that's not anywhere near where I run mine. 31x31 Base Timing Table, Idle Neutral Timing, Idle In-Gear Timing, Vacuum Advance, Cruise Timing, With the vacuum advance canister disconnected and vacuum source port plugged, the initial timing is set to 15* BTC - total timing kicks-in @ 2600-3000 RPM's, and now at 33* BTC. Joined: Dec 22, 2002 Posts: 12,189 I have some questions about the timing-chain in my Dodge Van 318 TBI vacumn to sense load (MAP sensor) to calculate advance. I think there may be one of two issues. Joined Jan 22, 2012 Messages 137 Reaction score 2 Location Chalmette, La. It’s likely that our static ignition timing at the crankshaft at idle may not be the desired 10 degrees BTDC. (+-7,5° extra adv. All in by 3000 rpm. I had 18 on a stock '83 318. 020 over, stock pistons, 302 heads decked to 58cc (ported), Edelbrock Performer intake (ported), Edelbrock 1406 600cfm Carb, I'd be interested in hearing more about the ignition module and its problems. 30-35 deg at around 3000 RPM For your stock smog engine with computer controlled ignition, you should follow the instructions that are listed in the photo that MALC provided above and reposted below. (SORRY BOUT THE CAPS i BUMPED THE KEY Initial 993 timing specsis this what to expect? '85 911 Carrera, stock, just painted, Orient Red 01-03-2006, 08:35 PM Pelican Parts If you remember we had a conversation about backdating the old sprockets onto my 993 camshafts and the keyway was the issueand I was likely to need a keyway cut in order to use the "old" system. Posts: 21,214. Usually for stock Chevy around 4-6 degrees btdc at idle. Got a vacuum gauge? Low vacuum at idle also denotes the cam is not in time. Then set the carburetor once the timing's set. That seems crazy high, and with 87 octane in the tank on the test drive it was pinging hard. Stop advancing when the rpm increases to more than 750rpm. The Crank Position sensor was replaced. 18/20° of initial plus 18/20° of mechanical advance. Just play with it and run as much initial as you can without pinging. My 81 loves 16 deg BTDC, lots of power (relative term but a far cry from The 66 Belvedere ll I got recently was missing the timing tab on the engine. You're into the mechanical advance and total timing may be an issue. 040 for the first round. Idle with a stock cam is about 650-700 rpm with no vacuum advance connected to the carb vacuum source. What's new. Centrifical advance couples the spark timing to crankshaft speed, so the amount of lead increases at the Find a service manual for that 5. Joined: Aug 2005. 92 intake valves, 214/224 cam, 1. From stall to about 3600rpm, your centrifugal timing has to satisfy the first rule; give it as much timing as she wants at WOT, until it detonates then subtract 2 or 3 degrees for a safety margin. I have a 67 that has a 408 stroker in it I have a 1995 Dodge Ram 1500 5. It's just a tool to make reading the mark easier. The 3000rpm total timing is for reference, IF you have a dial-back timing light. Plug back in dist vacc. The reason for low initial timing was an attempt to lower emissions. What should be the initial and total timing be ? I do have a Dial 9) Defeat the Vacuum Advance, and with the engine running, grab the distributor, and pull in some timing; leave the timing light in the tool box. Jump to Latest 2006 Ram 2500 5. If it is closer to 14* then you will need more initial to get to 32*. 9 V8 with 250,000 miles, and I am having an issue with the timing. Set your timing with the vac unpluged and the hose capped, when you reconnect the vac your timing will advance to around 30 deg. N. There needs to be defined settings, even for initial. Everyone is having problems with ethanol. through the ign. retarded. Poly 318 Ignition Timing, Points Adjustment, Distributor Conversion (applicable to 277, 301, 303, 313, 318, 326, 390, 402 and LA 273, 318, 340 and 360 engines) With vacuum advance providing 14°, we must set initial timing at 2° after TDC Need help timing 318/360 Magnum. when i connect the advance to either upper or lower vacuum ports on the carb the motor revs to full I'm running a stock 67-383 non hp with a Mopar Performance electronic dizzy and a GM ignition module conversion with 50kv coil and . Lastly, if you are running a cam with longer duration than stock, you will likely find the engine prefers more initial advance, which consequently give too much total advance. I see nothing in your build that would change that!!! Jester (Chris) Save Share there is no magic its a simple fact of the properties of aluminum and you can bet those stock pistons are worse than a forged set of aftermarket goodies. Most guys I've read advance as much Stock was 4-6 which was crappy. Faron. Timing specs vary, but a good rule of thumb is to set the timing at 12 degrees advance once the engine has started up for the first time. however, it's not completely stock and has long tube headers. I remember reading my dad's old shop manuals and setting the timing to 8 or 10 BTDC and thinking anything over 12 was too much. 050 Intake Exhaust Intake Exhaust 262 270 218 224 rebuilt with Speed Pro hyper pistons, comp ratio is 9. Measure it with the vacuum advance connected, and at a very low idle (650?). The only changes that have been made are a dual 2. 9 CUMMINS TURBO DIESEL (325/610-stock ) 4x4 Standard Cab Long Bed 6-Speed - Westin bed extender, LINE-X, Neopene seat covers ATS Exhaust manifold/header Timing is when your plugs fire in relationship to what position your valves are. some guys just weld up a little of the advaNCE SLOT BUT i THINK YOU CAN BUY BUSHINGS TO LIMIT THE TRAvel too. org) seems to be a sweet spot for stock to modified engines. I have a Snap On timing light that you can dial to the desired degree. Runs great. Most do pretty good with 10-12 degrees advanced. 66belvedere318poly Member. Forums. Post Sep 27, 2016 #18 my basically stock 390 seems to like 35-36* total timing (initial + mechanical), checked at 3000rpm with vacuum advance disconnected/pluged. Case in point, last year of the Pontiac 455 engines, distributor had 40 crankshaft degrees of mechanical timing, very stiff mechanical advance springs, and used ported vacuum advance, and, the total mechanical timing the engine was run at was 36 degrees. Discussion in 'Street/strip 400/430/455' started by 455Riviera, Sep 7, 2017. Thread starter 70Swinger510; Start date Feb 17, 2009 - 70Swinger510 Depending on how big the cam is you will likely find that the engine will likely 15-20 degrees BTDC for the intial timing. Good luck! 1972 Dodge Van "Tigerlilly" - Blazing Copper/Sandstone Metallic - 3850 lbs empty Chrysler 318 LA-Block - Stock Ignition Timing. Next thing will be the rad hose which runs on the driver's side. Timing 318 2 barrel. I turned in the vacuum advance screw 7 turns, I only have 11" of vac at idle and it took 13" to move the vac advance, this must have some effect on whats happening now right? 318 timing problemsplease help: dart_gt_67: Performance Talk: 2: 03-06-2000 09:10 PM: All So what initial timing setting would you recommend for this cam: Comp Cams XE 262H Duration Adv @ . This is a 5. I beleive 20 degrees initial covers up some curve issues. It generates gunk that's clogging up lines, filters, dip tubes, carbs Need some assistance with engine issue with the 318 in my 68 Polara. 5* BTDC is not enough to get a clean idle. 1:1 compression ratio I run 18 degrees initial and 34 total all in by 2,500 RPMs. See Mostly stock 455 timing issues. Vehicle Help. 5 compression ratio Comp Cam #20-221-3 20-221-3 - Xtreme Energy™ Hydraulic Flat Tappet Camshafts stock j My initial timing is @ 33* with no vacumn (plugged) It isn't stock anymore so you can't assume you can set the timing the same as stock and expect it to run the same. Then measure what is on the engine. 6 rockers giving . Ever since I started the engine, I had trouble with over heating, rough idle, and sporadic vacuum at idle.