its no different than a chevy, don't worry about initial timing at first, get a dial back timing light and set advance to 36 degrees at 2800 rpms then see where the idle timing is but if you want to just set the timing mark to the top of the tab and drive to check for pinging and starting issues then move down the tab 2 degrees until it don't. If it needs to be adjusted, do so now before setting timing. Remember, two degrees of dwell equals one degree of timing. Okay, now hook up the timing light and get it pointed to the timing marks. Rotate the distributor to get the correct advance setting, then turn off the engine and tighten the hold-down clamp. Replace the vacuum advance hose. HEI External Timing Adjustment Knob Visit the Speedway Motors Store 9 ratings Price: $32.72 This little jewel replaces the vacuum advance on an HEI distributor Allows you to change the timing without having to loosen the distributor Just turn the knob for instant timing adjustments Features a Natural aluminum finish. Joined Oct 28, 2012. 4,254 Posts. #8 · Jul 3, 2015. Chevycraze350 said: His is a toy so he wasn't looking to spend a shit ton on a stand alone computer I thought about it and I'm going to try and keep the tbi but I'm still clueless on the wiring up of it because the 5.7 tbi dosent have a crank sensor and the computer in the truck is for a 4.3. Joined Oct 28, 2012. 4,254 Posts. #8 · Jul 3, 2015. Chevycraze350 said: His is a toy so he wasn't looking to spend a shit ton on a stand alone computer I thought about it and I'm going to try and keep the tbi but I'm still clueless on the wiring up of it because the 5.7 tbi dosent have a crank sensor and the computer in the truck is for a 4.3. You only have to open your hood, locate where the HEI distributor will go, and set up its coil. The unit will take things forward from there on by smoothening your engine's ideal and improving its starting. Yet another area where this model impresses is its RPM range. Most budget models you see on the market won't go above 5,000 RPM. You simply right click, add a plot, and drag it to the point on the table you want it to be, and you're well on your way to creating your own completely custom timing curve. You can also set your desired maximum and minimum timing limits through out the curve by using the Data Editor Menu as safety precautions. Step Retard For Nitrous Applications. I set my initial timing at xiv degrees but then when I rev the engine and permit information technology fall back to idle, the timing light shows that the timing now is at 16 and.
On a small block Chevrolet, the rotor spins clockwise when viewed from above, for example. Start the engine with the B pin disconnected, and set the timing as seen on a timing light to the trigger offset you want to use by loosening the distributor and rotating it. Usually you will want a value between 0 and 10° BTDC. (I use 0.). Now rotate the engine clockwise with your finger over the Number One spark plug hole until the rotor again achieves 10 degrees BTDC while noting pressure on your finger over the spark plug hole. Also make sure the rotor is still pointing at the mark indicating Number One position on the distributor. Back in 1975 when GM started using HEI, they wanted plug gaps set at .060 till they found out it was hard on caps and rotors, as mentioned. ... Most gap points for Chevy small-block engines require . 016 to . 019 of an inch. ... 1970-75 Tune-up Specifications Year Engine Car Model Spark Plug Type (AC) - Gap PointGap Ignition Timing (BTDC or. Re: setting time on a 5.7. Here's what the manual states: EFI / MPI Models. 1. Connect timing light to number 1 spark plug wire. 2. Start engine and run at 1300 rpm until it reaches normal operating temperature. 3. Stop engine and connect the scan tool or timing tool to the DLC connector on the EFI/MPI wiring harness. Make sure the correct timing mark is lined up with the seam in the crankcase. If you turn too far clockwise, rotate it about 30 degrees back (counterclockwise) before moving forward again to find the correct position. Go more slowly next time! Take off the distributor cap and take a peek inside. So, set your initial timingwith no vacuum advance. Set your timing curve (springs/weights/bushings) with no vacuum advance. Then, plug your vacuum advance back in. Also, at 1200 RPM's you MAY have some mechanical advance already kicking in. I bring my RPM's down as far as possible when I set my initial timing - like 850 RPM's. 4:20 AM. Get an advance timing light from Sears and map it out from idle to 3000. Then run it over 2000 and set total advance to 34 - 36° advance at 2500 - 3000 rpm with the vacuum advance connected if you are using it. Set it the same 34 - 36 total if you are not using vacuum advance, you will just have more initial timing at idle. ACCEL 0416S-4 U-Groove Spark Plug Header Plug ; 14mm Thread; Shorty Plug For Headers; .750 in. Reach; Champion RC12/RC13/RC14 Heat Ranges ; 4 Pack; 10 8Pcs 41-962.
8.5 MM High Performance Spark Plug Wire SetHEISBC BBC 350 383 454 Electronic Universal Set For SBC & BBC Chevrolet Engines Electronic Ignition HEI Plug Wires, 90 Degree Boots on Both Ends Get more Spark to your Plugs with a set of High Performance Ignition Wires These 8.5mm wires feature high-temperature 100% pure silicone insulator outer layer!. Small block Chevys (and most other GM performance V8 engines) perform best when the total timing (full centrifugal advance plus the initial timing setting with vacuum advance hose disconnected) is all in by 2,500 - 2,800 rpm and is setto about 36 degrees. If you have an adjustable timing light, this is very easy to check. If you don't, you. On a small block Chevrolet, the rotor spins clockwise when viewed from above, for example. Start the engine with the B pin disconnected, and set the timing as seen on a timing light to the trigger offset you want to use by loosening the distributor and rotating it. Usually you will want a value between 0 and 10° BTDC. (I use 0.). Time it with a vacuum gauge, run it up to roughly 2500 rpm and turn your distributor until you reach your highest vacuum reading then lock it down. That should put you in the 8-10 degree range (no vacuum advance) for initial. This is of course assuming everything is set up as it should be. Then I filled the hole in the base where the vac advance went through. I then drilled 2- 3/8 holes in the bottom of the unit and epoxied fine brass screens to the inside. I installed the dist and wires and checked the timing. The total advance of the original dist was 15 degrees it was the same on the HEI unit so no modification was required. howto advance timingsbc, More Steps To SetTimingOnSbcWith Vacuum Advance Connect the vacuum pump to the distributor vacuum advance using a gauge. Start the engine and instruct your aide to crank it up to 2,000 rpm. Step 5: Increase the vacuum to the reading obtained during the driving test. Using the timing light, examine the timing mark on the harmonic balancer. . Burn these changes and close this menu. Step 4. Now navigate over to the Tools Menu and open up the Trigger Wizard. The Trigger Wizard dialog box will open. Step 5. Now it's time to check your timing. The goal is to verify that the commanded ignition timing, the static value you entered earlier, is lined up with the actual timing.
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It changes valve timingto enable the engine to rotate in the opposite direction. The firing order for a Chevy marine engine that makes a reverse rotation is 1-2-7-5-6-3-4-8. ... For the Chevy 350, the HEI Distributor Cap has this firing order: 1-8-4-3-6-5-7-2. For a small block Chevy V8 engine, the distributor cap firing order goes in a ...
Toset the timingon that engine, have the s/plugs out, and have the throttle at full, set that timer base under the flywheel tight against the rubber stop on the end of the full spark timer advance stop screw (wire it against that stop if necessary). Rig up a spark tester on the #1 cylinder plug wire. Hook up the timing light to the #1 plug wire.
6) This process allows the ignition to synchronize and fire the first spark plug within 180 degrees (1/2 engine revolution). 7) The camshaft position (CMP) sensor provides the ICM with cylinder #1 firing order information, which the PCM uses for sequential fuel injection.
With the Number One spark plug removed, place your thumb over the hole while turning the engine. Once you feel compression building, look for the zero mark on the harmonic balancer to approach the timing tag. We prefer to set the initial timing for most engines at 10 degrees Before Top Dead Center (BTDC).
265-283-327-350-377-383-400 without GM HEI Dist. Big Block Chevy, 396-427-454-502. Ford 289-302 Windsor or 351 Windsor. Ford 351 Windsor Tall Intake. Ford, 351C (4V) or Boss 302. Ford FE, 390-427-428. Ford, 429-460. Ford, Not Shown Above. For other Ford Combinations, Intake Adapters are available through Price Motorsports to fit a variety of ...