8 Pin CDI Rebuild

[911hunt]

I am almost finished with my 76 930 motor and need to sort out ignition. I have looked at the usual suspects that rebuild CDI boxes but many don't support the 8-pin CDI boxes. Does anyone have a recommendation for a trusted vendor to go through my 8-pin CDI? Thanks!

[MBAtarga]

Did you contact Pelican user ischmitz?

[Flat6pac]

Years ago,
I needed my 76 turbo 8 pin rebuilt and sent it to Zims in Texas
Try Bob Ashlock, on PP.
Bruce

[gumba]

Bob Ashlock rebuilt my 8 pin cdi a few years back.

[Jonny H]

We can put our modern electronics in your 8 pin case or we have a complete 8 pin replica box.

[john walker's workshop]

I used a 6 pin on my 77 930. Eliminate the two wires that go to that condenser looking module attached to the panel, get a 6 pin plug and swap the wires from the 8 pin plug in the correct order.

[blucille]

+1 for Bob Ashlock. Good guy, great work, fair prices, quick turn-around. What more could you ask for?

[Tom F2]

Another vote for Bob Ashlock.

[digitaldgp]

Another Vote for Bob Ashlock, he just finished my CDI.

[mysocal911]

Those Bosch CDI units are very reliable and rarely if ever fail. Many assume that this CDI has failed because it doesn't buzz
like the 3/6 pin Bosch units. Do a Google search for its part numbers; 0 227 300 002, 0 227 300 003, various rebuilders.
Typically the problems are; a bad 12V power input or a bad distributor signal, both easily checked with a volt/ohm meter.

Avoid using the Bosch silver coils with any CDI units

[mysocal911]

Interesting read here; 6-pin SC/Turbo CDI unit repair documentation

[Jonny H]

Originally Posted by john walker's workshop

I used a 6 pin on my 77 930. Eliminate the two wires that go to that condenser looking module attached to the panel, get a 6 pin plug and swap the wires from the 8 pin plug in the correct order.

A 6 pin box won’t drive an early Turbo tacho. You’ll need one of Bob’s adapters too.

[911hunt]

It looks like Bob is the go to guy. Thanks for the recommendations!

[john walker's workshop]

Originally Posted by Jonny H

A 6 pin box won’t drive an early Turbo tacho. You’ll need one of Bob’s adapters too.

Seems to drive mine.

[Jonny H]

Originally Posted by john walker's workshop

Seems to drive mine.

Check the year of the tacho, probably a later one.

8 pin boxes produce a 400V positive spike to drive the tacho. The tacho on the early Turbo is therefore more like a 69/70 tacho (that was driven direct from the coil). 6 pin boxes are just 12v so will only drive the low voltage ones (as fitted to the later Turbo).

8 pin boxes will drive tachos designed for 12v but I can’t imagine it is very good for the tacho!

[john walker's workshop]

Thanks, I'll check the date stamp.

[porschetub]

Originally Posted by gumba

Bob Ashlock rebuilt my 8 pin cdi a few years back.

Bob is a great guy to deal with,happy to help me with my ignition setup also.

[911hunt]

I received my box back last month from Bob an dit is an absolute work of art!

[dicklague]

Originally Posted by mysocal911

Those Bosch CDI units are very reliable and rarely if ever fail. Many assume that this CDI has failed because it doesn't buzz
like the 3/6 pin Bosch units. Do a Google search for its part numbers; 0 227 300 002, 0 227 300 003, various rebuilders.
Typically the problems are; a bad 12V power input or a bad distributor signal, both easily checked with a volt/ohm meter.

Avoid using the Bosch silver coils with any CDI units

the Bosch CDI is a 50 year old design with 50 year old components.

A modern CDI is much much better. Even having a soft rev limiter is great plus more spark.

Best day of my life is when I dumped that old Bosch!! My 911 came alive with a good modern unit.

I know you won't agree. Loren