Speedometer Cable Length Question

[sayah]

Does anyone know the correct lengh for 911 speedometer cables. I am considering having a new one made and the people at the shop doing the job seem to know what kind of ends to put on it but want to know the lenght.

Thanks for informed responses.

[Early_S_Man]

What year car?

[sayah]

The car is a 1975 911.

[Britwrench]

You can use 901 741 111 01 (this part is available), which is the substitute for 901 741 112 01 the current part number for that car. According to the info I have the cable is 2442mm long.

[Halm]

Learned something the hard way last Fall about the cables. Seems that the one available for early cars is slightly longer than the original one. The slack from the extra length must be spread out equally between the attachment points. In other words, don't just stick on there and let the extra length find a home. If it is not equal, it will snap within 100 miles.

[sayah]

My math is terrible, does that make it 244 cm long?

[Pat S]

Originally posted by Halm
Learned something the hard way last Fall about the cables. Seems that the one available for early cars is slightly longer than the original one. The slack from the extra length must be spread out equally between the attachment points. In other words, don't just stick on there and let the extra length find a home. If it is not equal, it will snap within 100 miles.

What do you mean by spread out equally? I'd think as long as it isn't kinked or bent sharply anywhere it should be fine?

Pat

[Halm]

Originally posted by Pat S
What do you mean by spread out equally? I'd think as long as it isn't kinked or bent sharply anywhere it should be fine?

Pat

Pat, what I am trying to describe is that the exta length has to "live" somewhere, either in the area of the speedo, or at the transmission. Let's say that the new cable is 6 inches longer than the original. Then 3" of the new slack should be at the trany, and 3" at the speedo. Don't put it all, for example, up in the dash at the speedo.

HTH

[Pat S]

Okay. I guess the 901 has a different connection than the 915s. On the 915 there is no place to store the extra on the tranny side since it goes straight into the tunnel. If you pulled it back some there you would have one heck of a kink

Thanks,
Pat

[fintstone]

I have a new one in my garage labeled 90174111101 (64-76 911) that I purchased a while back. It is about a foot longer than that at about 109 inches or about 2768 MM. The label is handwritten, so the part number/fitment may be incorrect.

[Halm]

FWIW, I was told that I had to use the longer one becaue the original length was NLA.

[sayah]

The longer one with excess lenght is noisey right up behind the speedo.