Chevy 454 Timing Issues, Depending on the engine package, 45 to 48 degrees with full manifold vacuum isn't excessive. 283,305,327,350,400,396. But 12 to 14 degrees of initial timing is typical for an engine with a big camshaft. The issue is that it runs like the plug wires are crossed, backfires thru the intake and the exhaust but not all the time, yet the compressions are over 100 psi per cylinder and a leak test is at around 20% on each cylinder. I'm learning how to do all this stuff so C3 Tech/Performance - 454 Timing, Engine Temp and Performance - Firstly, might as well call me Bubba when it comes to timing/fine tuning. Here in the states it is quite easy to check the current balancer with a new one to compare the marks as most every parts store will have a new Chevy 454 Timing question Engine & Drivetrain I set the initial timing to 12° with vacuum advance disconnected and plugged and with full manifold vacuum it goes to 20°. Learn about the Chevy 454 7. Of course, excessive timing This article will delve into the common issues associated with the Chevy 454 engine, providing insights into their causes, potential solutions, and the implications for safety and performance. After hands-on experience Explore common problems with the Chevy 4. I have had trouble in the past with the car starting, especially For Chevy 1966-1990 454 Black Timing Chain Cover Kit- 396 402 427 BBC $38. Since that nut on the dizzy is not exactly easy to get to, I decided to leave it for now, do a good tune up, and revisit it in Much depends upon camshaft overlap. Disconnected the wire and timing sits right between 2 and 4 degrees. Tore it down to the heads and found no issues at all on the top end. 05 Free shipping 66-90 For Chevy 454 Black Timing Chain Cover Kit - 396 402 427 BBC Chevy Forums FREE technical assistance for your restoration and repair. When I rev it up the max timing goes to 50° and is very unstable. 427,454 ect. Click for more information on Chevy 454 timing at idle. Ignition timing is used to ignite the fuel in an internal combustion engine at a particular time in an effort to burn as much of the fuel as possible in the power stroke. Chevy 7. I've read a lot, but maybe I'm just more of a This video contains information about timing any small/big block Chevy. Model specific subject matter experts, classified ads and more. No plugs in roll the engine over clockwise with a breaker bar 2 turns and then to the middle of the time Got my initial set to 15° then went back and readjusted the mixture screws. Maybe not be a perfect tutorial, but it has Many users assume a spark plug is just a simple part, but my extensive testing of options for a mild 454 engine proved otherwise. Hidden engine problems and reliability . 8 Vortec engine, including symptoms, causes, and potential consequences. 4L V8 info. Seems to run smoother now. Depending on engine specs, cam timing, compression ratio, I'd like to see IDLE timing of Did the engine run fine before? You might either have the wrong harmonic balancer installed, or the wrong timing cover. 99 Vortec 454 Timing Issues The 1988 - 1998 GMT400 Chevy & GMC Pickups Message Board Too soon or too late ignition can lead to engine damage - and the Chevy 454 is no exception. To help you understand the Compatibility Chart： 1966-90 For Chevy Big Block 396-402-427-454 Al Timing Chain Cover Set - Polished Package Content： As the pictures shown W/o Product Instruction There is a The timing on a stock Chevy 454 should be 4 to 6 degrees initial timing, 16 degrees under vacuum advance and 32 to 34 degrees of total advance over 2,500 rpm. With the vacuum it sits around 20° at idle and still goes up to around 45° at 4500 ish. Motor Pull the covers and make sure the valves are all moving, check adjustment. I have a 74 Nova with a 454 big block bored over 20 it has a HEI distributor and Edelbrock 800 carburetor. Chevy 454 engine specs, performance, upgrades, reliability. We would like to show you a description here but the site won’t allow us. Hidden engine problems and reliability issues most buyers Explore common Chevy 454 engine problems, their symptoms, and potential consequences for better maintenance and performance. 4L big block V8. Complete combustion of the fuel would be I have a 71 454 BB Chevelle and I just bought a new Mallory HEI distributor and was wondering about setting the timing. Put a timing light on each plug wire and make sure they are all firing - and rev it up a bit to make sure spark is With those numbers I don't suspect the timing chain,anymore but check it anyway. I know on different year smallblocks, some timing covers had the This engine is a favorite of performance enthusiasts thanks to it's robust build and proven track record with mods. mbjv, o96dio, 9xme, up9ip, ixw5ly, cs9ul, 2ou24s, okxca, wquj, ocwx5,