Accel coils will they be effective pass 6500RPM
12-04-18, 11:27 PM
#1
Banned. I got OWNED!!!
Thread Starter
Accel coils will they be effective pass 6500RPM
my boy gave me 2 accel coils there model 8140c online it says high rpm but then it says effective til 6500 that means that after 6500 I won’t get spark ? I saw that these throw out 42000 volts that has to be better then stock want some advice B4 install here’s the link to the exact coil https://www.holley.com/products/ignition/ignition_coils/super_stock/parts/8140C does that mean that at 6500 I won’t get no more spark?
12-05-18, 05:21 AM
#2
ancient wizard...
No it doesn't. However unless your original Diamond coils are leaking/failing,they will put out a better quality spark than the new Accel coils will.
They're made of better quality materials.
The current Accel stuff is made in China,the company has changed hands so much all that's left of the product is the name. The older made in America Accel products were of higher quality.
If you were to do a proper side by side test of your oe coils and the Accel you would find the Accel provides no better spark quality than your originals and maybe less spark energy. Even though Their ad says they produce 42k volts,were you to replace yours with them ,you will not notice any gain in performance of your ignition system.
They're made of better quality materials.
The current Accel stuff is made in China,the company has changed hands so much all that's left of the product is the name. The older made in America Accel products were of higher quality.
If you were to do a proper side by side test of your oe coils and the Accel you would find the Accel provides no better spark quality than your originals and maybe less spark energy. Even though Their ad says they produce 42k volts,were you to replace yours with them ,you will not notice any gain in performance of your ignition system.
12-05-18, 09:35 AM
#4
Full Member
TL;DR: These coils will probably be worse at higher rpm than your existing coils, and may even be worse at lower rpm.
Long Version:
Unfortunately, Accel doesn't list enough details about their coils to be able to know how it will affect your spark. Based on the higher primary resistance of 1.4 Ohms and the listed application of 1968+ vehicles, I would assume that these coils are designed for points-style ignition.
All coils need to have the current through them limited in some manner to prevent them from burning up.
Points ignition uses higher resistance coils and ballast resisters, so that at full charge the coil current is low enough to not burn up the coil (maybe 3-6A).
Transistorized ignition (like on your '85) uses a low resistance coil (0.9 ohms based on car specs) which makes the full charge coil current quite high (10A+); the ignition module limits the coil current externally to something around 3-6A. This allows the coil to charge much faster, therefore storing more energy in its magnetic field in a shorter period of time.
If you use a points-style coil in a transistorized setup, the coil will not charge as quickly, leaving you with less spark energy per ignition event.
Voltage rating on aftermarket coils are almost meaningless, and are used for marketing because bigger numbers sell more coils. Most sources say only 8-12kV is needed to strike an arc. Higher voltage is generally only needed for higher combustion chamber pressures, larger spark plug gaps, and fouling plugs.
The RPM listed will probably be when the coil can no longer charge enough to strike a reliable spark on a V8. Since a V8 has 4 ignition events per rotation, and a 2 rotor wankel only has 2 ignition events, the coil is seeing half as much rpm as it would see on a V8.
Long Version:
Unfortunately, Accel doesn't list enough details about their coils to be able to know how it will affect your spark. Based on the higher primary resistance of 1.4 Ohms and the listed application of 1968+ vehicles, I would assume that these coils are designed for points-style ignition.
All coils need to have the current through them limited in some manner to prevent them from burning up.
Points ignition uses higher resistance coils and ballast resisters, so that at full charge the coil current is low enough to not burn up the coil (maybe 3-6A).
Transistorized ignition (like on your '85) uses a low resistance coil (0.9 ohms based on car specs) which makes the full charge coil current quite high (10A+); the ignition module limits the coil current externally to something around 3-6A. This allows the coil to charge much faster, therefore storing more energy in its magnetic field in a shorter period of time.
If you use a points-style coil in a transistorized setup, the coil will not charge as quickly, leaving you with less spark energy per ignition event.
Voltage rating on aftermarket coils are almost meaningless, and are used for marketing because bigger numbers sell more coils. Most sources say only 8-12kV is needed to strike an arc. Higher voltage is generally only needed for higher combustion chamber pressures, larger spark plug gaps, and fouling plugs.
The RPM listed will probably be when the coil can no longer charge enough to strike a reliable spark on a V8. Since a V8 has 4 ignition events per rotation, and a 2 rotor wankel only has 2 ignition events, the coil is seeing half as much rpm as it would see on a V8.
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