Reply to thread

See what others are reading now! Try Forums > Current Activity

Message: <blockquote data-quote="vwmania" data-source="post: 1200373" data-attributes="member: 8882">There Are Four Different Ignition SystemsYou Can Use On a VW1. The Stock Points/Condensor System. Works okay, but the voltage at the plugs gradually drops as the rpm increases (this happens with all points/condensor systems) and the points will also start to "float" at very high rpm. The plugs get about 18,000 volts. The points wear fast because they have to switch about 5 amps, and so they spark. The condensor reduces the sparking but it still happens so the points wear out (burn). The spark also slows down the switching process, so the coil gets a "soft" switch and the resulting plug voltage is a little less than it could be. (The coil produces the high voltage to the plugs when the points open and the magnetic field inside the coil collapses. The faster you can cut the power to the coil the faster that field collapses so the better the plug voltage).2. The Pertronix/Compufire Points Replacement Modules. These replace the points with a hall-effect sensor or (in some earlier models) an optical sensor. They electronically switch the power to the normal coil, so the coil is still working at 12 volts (but the elecronic switching is faster than the sparking points so coil performance is a little better). The plugs get about the same 18-20,000 volts. These points replacement units don't wear so your timing stays very steady and doesn't need adjusting much.3. Transistor-Assisted Ignition. These use a very small current through the points to switch a power transistor on and off (imagine the power transistor as an electronic relay - using a small current to switch a bigger current) and the power transistor supplies a normal 12 volts to the coil. But like the Pertronix it provides faster switching than sparking points can, so coil performance is a little better than stock - still in the 18-20,000 volts range to the plugs though. The points last a long time as they don't spark any more - only a tiny trigger current flows through them. These systems are not very common these days, but will work well, and are easy to build. You could consider these sytems as a cheap alternative (but roughly equivalent) to the Pertronix/Compufire.4. Capacitance Discharge Ignition (CDI). This can be triggered by systems #1 or #2 above, but is not used in conjunction with system #3 at all. (Consider it as a BOOSTED #3). The CDI system has a couple of very large capacitors continously charging from a high frequency circuit using a "toroid" (donut shaped) transformer inside the unit (the high frequency produces the characteristic whine like a camera flash charging up) and when the points or the Pertronix triggers it, the capacitors dump about 400 volts through the coil, so you get about 40,000 volts out of it for the plugs, rather than the normal 18-20,000v. This provides a thinner but much hotter spark which will light a weak or rich mixture, so you get easier starting, and you also get slightly better economy, and your plugs last longer. And of course - if you use it with the normal points, the points will last a long time because they are only providing a small trigger current - the capacitors are providing the main pulse to the coil. You can open the plug gap a little with a CDI - for a longer spark. Up to about 0.045", but if you set it at 0.035" you can forget the plugs for many thousands of miles - the electrodes with still burn away slowly, but won't go "over gapped" because you started with a modest increase. One useful feature of POINTs fired CDIs is that they can be used to upgrade the ignition on early VW engines and still retain the retarded #3 ignition which is needed for the non-doghouse engines.MSD is usually a variation of the CDI - providing a multi-spark rather than a single spark.There are also magnetos which will fit the VW engine - these are self contained ignition systems - no battery is needed, and are sometimes used in VW aircraft engines.</blockquote>

Verification

The Marketplace Latest

R35 GTR 2020 Original Rim Wheels
- Started by aycy
- Chassis and Wheels
Greddy Trust R35 Y Pipe GTR GTR35 Exhaust Used
- Started by aycy
- Exterior and Body
Nissan Silvia S15 Door Trim Card Panel Bride
- Started by aycy
- Interior and Cockpit
Atlas Force UHP Used Tire Tyre 275 35 20
- Started by aycy
- Chassis and Wheels
R35 GTR Ohlins Adjustable Suspension
- Started by aycy
- Chassis and Wheels
Nismo LMGT4 40th Anniversary 18x9.5+12 White
- Started by aycy
- Chassis and Wheels
Rays G025 18 inch VW Audi S3 A45 CLA45 Golf MK7 MK8 Rim
- Started by aycy
- Chassis and Wheels
S13 S14 S15 Used Drift Rim Tire Set
- Started by aycy
- Chassis and Wheels
R35 Used Titanium Exhaust
- Started by aycy
- Engine and Performance
PWR FL5 / FK8 Street Radiator 42MM
- Started by aycy
- Engine and Performance

Posts refresh every 5 minutes

The hunt for this Skyline

So recently i was surfing the web about stuff of my skyline and suddenly this poped out.

Has anybody ever seen this guy? The...

Asking!!!Please help!!!

Can anyone help me fuction for each item of below:

Apexi AFC Neo
Apexi AVC-R
Apexi AVC-D Boost Controller
Apexi EL2 Control Unit
Apexi Rev/Speed Meter - RSM

neep opinion

i need to know which is better???
1) install k&n filter but air intake is hot coz air taken from the hood......the k&n filter i am using is those 360 degree type for caburetor engine
2)stock air filter but modified...