If not you may have carbon build-up inside and it needs to be cleaned out with a combustion chamber cleaner, GM makes a good one. $59.98 Push rods are hollow steel with hardened ends on all but the 396 V8 which used carburized steel inserts. This is for an engine with stock camshaft, heads, stroke, and a compression ratio of 10:1. is 2 degrees. I will also agree about the carbon build up. 396-454 Big Block (1965-1991) and High Energy Timing Kit High Energy OE-Style Timing Sets - Timing Components - Products: 396-454 Big Block (1965-1991) and High Energy Timing Kit JavaScript seems to be disabled in your browser. What cr are you at and what are the cam specs? Thus, a car set up to produce 36 degrees of ... 1967-68 All 396 1969 Corvette 427 High Perf. I started with Nothing and still have All of Nothing! Re: 1966 396 375hp timing settings 04-27-06 11:56 AM - Post# 924708 In response to Tic's60 On my 9.5:1 ish 396 the initial is currently set at 16 and it has 22 degrees of mechanical - and it's all in by 3k. advance spec, the total centrifugal timing at cruise must be considered. Then, use a timing light or timing gun to check your vehicle's current timing number to … True valve timing on Chevrolet camshafts is milder in most cases than the timing specifications on blueprints indicate. For a better experience, please enable JavaScript in your browser before proceeding. Over 6,000 Automotive Torque Specs. Pull distributor, set ign rotor so that when you drop distb back in the rotor is pointing exactly at number 1 ign terminal on the distributor. Chevrolet includes clearance ramps in their valve timing … If you bring in the mech advance too soon it will start advancing below idle speed, which causes an erratic idle. Main Caps 396-454 (4 bolt) Inner and Outer bolts Engine Oil 110 ft-lbs. Customer reviews. ... All things considered, the 396 cubic-inch L78 big-block churned out 425 HP @ 6,400 RPM, and 415 lb-ft of torque @ 4,000 RPM. Chrome steel timing tab fits 1965-1991 Chevy 396-402-427-454 big block engines with an 8" harmonic balancer. Last time I drove it I did hear it pinging a little … It was set right on 0 when we started but it seemed to run a little better the more we moved the mark to the left of 0 but we didn't want to move it to far because it seemed we were going in the wrong direction. B. Bottom line is with the cam/comp your running in your 396 maybe now 402 if bore .030 for rbld bbc will run very well with approx 18 deg base timing + 18 deg mech adv all in by 2600rpm or so for 36-38 total with a min of 93 oct fuel and will likely need a hit of real lead booster to get closer to 97-98 octane for best perf,most power with no run on. We have initial (static) timing of 10-12 degrees, centrifugal advance of 20-24 degrees which would give us 30 - 36 degrees advance so far. ... /284981/5547/566 hi performance big block. I have to admit it has been a long time since we (my brother-inlaw and I ) did a tune-up like this (points, plugs, condenser, rotor etc.) I run 38 deg total (initial + mech) in my 396 on 92 octane with no problems. I would certianly check for timing chain slack. 6 degreed advanced or BTDC. 0 !!!!!!!! For the specs you referenced in your previous post, centrifugal advance is all in. Although the 390 was equipped in some high-performance applications, such as in the Mustang in 1967, the engine was known more for … 1970 Chevrolet Chevelle SS 396 Sport Coupe 375 … There were four in all: two high-performance car engines of 396 and 427-cid, a 366-cid heavy-duty truck unit, and a 427 heavy-duty marine version.The 396 was scheduled to replace the 409 in all its applications, even though that engine was hardly old. VerticalScope Inc., 111 Peter, Suite 901, Toronto, Ontario, M5V 2H1, Canada. No I don't mean harder plugs, competition coils, lumenition etc., that only affect the efficiency of the spark, but the actual ignition advance supplied by the distributor. Find CHEVROLET 6.5L/396 Chevy big block Mark IV Timing Chain and Gear Sets and get Free Shipping on Orders Over $99 at Summit Racing! Hey guys is 38* to much total timing for a 396 with steel heads, quadrajet (SMI), RV cam, flowmaster exhaust,? Correct Dist PN is 1111170 for '67 396/350 Mechanical advance curve is: 0 deg @ 900 rmp 8.5 deg @ 1250 rpm 17 deg @ 2000 rpm 32 deg @ 5000rpm Chev recommends that timing should be set to 4 deg btdc (that's two marks toward B) If you have high octaine fuel or lowered compression ratio, car should take 38 deg total advance. Comp Cams . The high-performance versions are slightly higher with a maximum advance of 38 degrees on premium fuel, if … Not getting any knocking...but it's a new motor and don't want to screw it up. 1969 396 Exc. Come join the discussion about restorations, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more! The 32 year old chain must be stretched out. By the sound your describing it sure sounds like too much retard in the timing, it's getting chocked up and coughing. 3) Standard and Alternative Wheel and Tire Sizes. Upon its release, this new powerplant was the most powerful engine to call the Corvette’s engine bay home. 14 global ratings. Detonation sounds a little like popcorn poping. 1969 Corvette 350 TI 1969-70 302 Camaro 1970 400 4-bbl It is a single wire sealed connector that has a tan with black stripe lead. Main Caps 396-427 (2 bolt) Engine Oil 95 ft-lbs. You can get a photo by calling your local Chevy dealer service center and requesting one. To adjust timing, start by finding the optimum timing number for the make and model of your vehicle, which you can find online or by asking someone at your local auto parts store. The cam was replaced by the previous owner, I was told it is a Lunati 108 centerline cam (not sure of the numbers, but it is a mild street cam with a lot of lope). Is it possible that the timing chain is worn so much (matching numbers motor) that the timing marks are off. Wiki User Answered . Comp Cams 3110 Performacne Timing Chain Set 1965-1996 Chevrolet Bbc 396 - 454. If you ping when at 14 degrees then bring the timing down to 12. 396/325 (Hydraulic) - .398 lift (intake and exhaust) 322 duration (intake and exhaust) 396/350 (Hydraulic) - .461 lift (intake) .480 lift (exhaust) 350 duration (intake) 352 duration (exhaust) Ed 2009 AACA 1st Place National Junior Award, VerticalScope Inc., 111 Peter, Suite 901, Toronto, Ontario, M5V 2H1, Canada. Check your firing order, 1,8,4,3,6,5,7,2. Then the slot must be partially welded up. 1970 Chevrolet Chevelle SS 396 Sport Coupe 375-hp Hydra-Matic (aut. The timing on stock 396, 402, 427 and 454 engines is 32-34 degrees total advance at 3500 rpm. You can put a stethascope on the timing cover while it is running to check for the noise. Bring engine to TDC on compression stroke. For a better experience, please enable JavaScript in your browser before proceeding. The Chevrolet "Big Block" is a term for a series of large displacement V8 engines that have been developed and produced in the United States from the 1950s until 2009. As American automobiles grew in size and weight following the Second World War, the engines powering them had to keep pace.Chevrolet had introduced its popular small block V8 in 1955, but needed something larger to … Crackling (pre-ignition) noise made by an engine "running on" with the ignition off is is very similar. Good luck. I replaced the point distributor with an Accel HEI. ... '68 396 timing suggestions? The 396 V-8 was just one member of a whole "Porcupine" family, officially titled Mark IV and marketed as the "Turbo-Jet." Took my 67 SS Chevelle out of storage this weekend and did a tune up before putting it on the road. Top Answer. The Chevrolet 396-cid, big-block's destiny was decided long ago. 3/8 Connecting Rod Cap Engine Oil 50 ft-lbs. I would set it between 12-14 degrees B. 66 396 .030 over (402), oval port heads cast iron, weekend warrior for chasing down cheese burgers and chocolate shakes. The cleaner would be called carbon remover or top engine cleaner. Asked by Wiki User. Search Car Torque Specifications by Engine or Model All, this video was designed to help others. Use a timing light with vacuum advance disconnected. The distributor timing curve and initial advance settings were designed to accommodate a wide range of operating conditions, such as driving habits, weather, altitude, maintenance schedules, and gasoline quality. A forum community dedicated to Chevrolet Chevelle owners and enthusiasts. The BoxWrench Engine Specs Database is a community resource for mechanics of all skill levels to access a reference library of Firing Orders, Distributor Rotation Directions and Block-Cylinder Numbering as well as Torque Specs, Timing Settings and Cylinder Head Tightening Sequences among other engine specs. It isn't likely to change much with HEI. JavaScript is disabled. 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. To get it to idle with the Vacuum advance disconnected and plugged, I had to set the timing at the first mark too the left of 0 which no matter how you look at it is not 4 degrees. Ignition Timing As you probably can guess, the timing advance curve for older Chevy V8’s was set up by the factory as a compromise. A forum community dedicated to Chevrolet Chevelle owners and enthusiasts. Also sometimes just installing the bronze bushing that comes in the kits won't shorten the mech curve enough. R.H.. - I have a 66 396 in a 68 SS. I'll say that the problem will go away when the engine is timed correctly. & a 427 chevy last 3 letters trk or krt year & hp. Engine has 10.0-1 CR, iron oval port heads , iron intake, Q jet, headers, and 221/233 dur cam. Mytmouse, Has your engine been restored? 4.8 out of 5. Ignition Timing for Modified Engines An often neglected but important area when tuning an engine is the ignition system. This video shows how to set Initial Timing and Total Advance Timing on 350 Small Block engine. You're probably near max for pump gas but if it's ok if it's ok (no ping or other problems). 1 8 4 3 6 5 7 2 An oldie, but a goodie- have fun. 4.8 out of 5 stars. After adjusting the mixture screws on the the Quadrajet, the 396 pumped out 199 (corrected) horsepower and 274 lb-ft of torque. The manual said set the timing at 4 degrees BTDC. Judging from the cam specs shown in the book, the later 427 and 396 had a slightly higher lift, .519 in and less duration on overlap to create a better behaved street engine, much like the taming of the 30 30 cam for the larger 350 LT-1 later created a better behaved and better performing street motor. The 390-cubic-inch "V8" was one of Ford's most popular big-block engines of the 1960s, and was widely used in passengers cars and trucks. Oil Pan Engine Oil 12 ft-lbs. 9.5:1, and,298/301 lift,218/224 dur,110 lobe... Too much throttle opening will make it diesel . The timing connector for the Chevy Silverado breaks out of the engine wiring harness conduit adjacent to the distributor. Customer Questions & Answers See questions and answers. And FWIW the shorter the mech advance curve (for more initial), the stiffer the springs will have to be for a certain "all in" rpm. Adjust the point dwell to 30 degrees and the adjust the idle speed. I'd have to say that each line ! 396-454 Big Block (1965-1991) and Gen III LS2 Single-Bolt Keyway Adjustable Billet Timing Sets - Timing Components - Products: 396-454 Big Block (1965-1991) and Gen III LS2 Single-Bolt JavaScript seems to be disabled in your browser. The specs are in the Service Manual (and also in CBTN), but you have to remember, Chevrolet specs are not the same as aftermarket specs. See Answer. Timing should be checked at each tune-up and any time the points are adjusted or replaced. Oil Pump Engine Oil 65 ft-lbs. L78 Technical Specs and Configurations. Make sure timing mark on balancer is 0. Dist has an aggressive mech curve and vac advance limited to 10 deg. Looking at the marks on the timing plate it looks like this A !!!!!!! so we may be a littl out of practice (bought this car only about 8 months ago) Every thing was going fine until we went to set the timing according to the 67 Chevrolet Assembly manual. 7/16 Connecting Rod Cap Engine Oil 70 ft-lbs. 2011-03-21 20:49:28. High Perf. JavaScript is disabled. The ignition timing is 4 degrees before top dead center. Come join the discussion about restorations, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more! GM 6.5L-396ci-V8 Engine Torque Specs. What is the timing specs for a 1969 396 Chevy big block? When I shorten the mech curve to where it needs to be for enough initial, many times I end up using the stock springs to get it UP to around 2500 "all in" rpm. I was trying to set the timing, but at the book 4 deg before, it dies.
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