Reyhan Blog: Bosch Gt40 Coil Specs

Bosch Gt40 Coil Specs

Sounds like you need the non r coil. This is a resistor inside the coil on the primary side that reduces the current flow partly so the points dont burn up.

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Bosch sports coil suits some points and some electronic ignition systems.

Bosch gt40 coil specs. Im using an after market electronic dissy. Bosch gt40 ignition coil. You can detect the presence of the resistor by measuring the ohms of primary side of the coil terminal 15 vs.

If it is 3 4a steady state current then resistance has to be 3 4 ohms which is not in this coil. Some people think the gt40 is not as robust as the standard types and i have noticed the same thing. Ignition coil gt40r bosch.

Gt40 fits vehicles fitted without primary ignition resistors. Maximum primary coil resistance reported by a friend is 075 ohms. Bosch ignition coils convert low voltage into high ignition system voltage creating an electric spark sent to the spark plugs which ignites the fuel.

I am not sure if heated coil has greater resistance for some reason. I bought a new coil for my 302 the other day as the old one shit itself. Please select the correct coil for your vehicle if in doubt please seek professional advice.

Ignition coils all bosch ignition coils are built to achieve or exceed oe specifications and are known industry wide for their reliability and performance. You want to either use the gt40 coil or a more normal bosch coil like the standard one. Ignition coils with the r are used with a ballast resistor which is about 18 ohms which then reduces coil input voltage to 9v.

But the gt40 will be fine until it dies like every other coil. Aussieveedubbers tech talk gt40r gt40 coils and electronic points. Coils without the r get the full 12 volts from the battery.

I was using the 6 cyl coil off my 250 that was in the car and it ran fine the shat after a while. Sae style secondary terminal primary terminal with 2x screw connections. I put the original coil off the motor out of a xc on it and it started.

Electrical specifications for bosch ignition coil no. Page 1 of 2 gt40 or gt40r for electric dissy posted in auto electrics including ecu engine management.

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