twk63

I am in the process of installing a set of charley arms on my 1988 944 SP2 car. I currently have a 951 brake set-up on the car, with 951 hubs and spindles and the original lower a-arms.

My technician informed me that the pins on the charley arms are of a larger diameter than what my car will allow and that I will either need to sources pins for the correct diameter or have the existing pins machined to fit the spindle.

My question is what is the correct diameter pin for a 951 spindle and is there a source for extended length pins (my car is lower by nearly 2" in the front) that will fit a 951 spindle? I will machine the pins if I need to but I would first rather look for a replacement pin.

Josh B

I believe the stock a-arm ball joint pin is 17mm. The Charlie arms were available with a 19mm pin. To make that work you would machine out the receiving hole on the spindle.

Wrightwood Racing is who made the Charlie Arms. You might be able to contact them and order 17mm pins.

Josh B

This is a good thread for research - https://rennlist.com/forums/924-931-...rlie-arms.html

lart951

You don't machine the pins but the spindles need to be bored to 19mm

Dimi 944

2nd

Another option is to look for already machined spindles for 19mm pins.

twk63

Thanks, I opted to bore out the spindles as the simplest solution

Van

Note, there is a "proper way" to bore out the spindles. don't just try it with a 3/4" drill bit...