Digging up an old post but seems kind of relevant to my na f8b.
I have converted to electronic ignition(Crane cams XR700) and want to know if replacing my standard coil with a Bosch GT40R will gain any improvment in performance?
Cheers
First loss.....
If you've switched to electronic ignition then ditch the 9v coil and ballast resistor pronto!
F8B EFI turbo - Three pots and a snail.
Yep, turf the standard coil and go for one that doesn't require a ballast resistor (the GT40R is designed for use _with_ a resistor).
I'm running an MSD blaster SS coil and found it very good. Prior to that I had a Bosch GT40T transformer coil and it also performed well.
I'm running an MSD blaster SS coil and found it very good. Prior to that I had a Bosch GT40T transformer coil and it also performed well.
F8B EFI turbo - Three pots and a snail.
Pretty sure they don't make a GT40 anymore, so get the transformer version.
F8B EFI turbo - Three pots and a snail.
The GT40 and GT40R are designed to run with a ballast resistor at 9V. With an electronic ignition you should run 12V, which is what the GT40T is designed for. You can buy them at any decent auto shop, or an MSD Blaster SS.
F8B EFI turbo - Three pots and a snail.
I think I get it. The standard coil has a ballast resistor and measures 3 ohms inclusive of the balast resistor but I need a coil with no ballast resistor which will measure around 1.5 ohm and the voltage should increase to 12v.
Am I on the right track
Am I on the right track
My Coil looks like it has some serious issues.
I ran a resistance test on it and got 13.8 k/ohm on the secondary coil and it should be 8 k/ohms
The problem I found replacing it was that none of the Shelf coils have a ballast pole on them.
I know Brayden installed the MSD Blaster SS http://www.ebay.com.au/itm/MSD-Blaster- ... 2a1cac1d61
what do you do about the ballast pole and leads?
Im running points
I ran a resistance test on it and got 13.8 k/ohm on the secondary coil and it should be 8 k/ohms
The problem I found replacing it was that none of the Shelf coils have a ballast pole on them.
I know Brayden installed the MSD Blaster SS http://www.ebay.com.au/itm/MSD-Blaster- ... 2a1cac1d61
what do you do about the ballast pole and leads?
Im running points
"When there is no more room in hell, the dead will walk the earth"
George A Romero - Father of Zombie Films
Sorry Brayden, My history in spare parts says GT40R with resistor hence the R suffix, Gt40 without.Brayden » Wed Jan 25, 2012 8:48 pm
The GT40 and GT40R are designed to run with a ballast resistor at 9V. With an electronic ignition you should run 12V, which is what the GT40T is designed for. You can buy them at any decent auto shop, or an MSD Blaster SS.
I will try to remember to have a look at what is still avail. on Tues seeing tomorrow is Labor day hol.
So many delays to getting my MB back in order with 993cc & 5 speed transaxle... neighbor issue gone, donor shell up on rotisserie, new sheds on the way.... another project also..