The Classic Opel Forums - View Single Post - 71 gt front caliper interchange-

Anonymous D · 11-06-2008

"This would be PERFECT! You can bolt on the calipers from the 75 models and get more braking."

No.

You should take any advice from an online board, with a grain of salt.

In this case, you are modifying the brakes, which is the most important safety system in the car. Your life, and the lives of others in your car or on the road, isn't worth risking by experimenting with results (from proceeding on a project based on insufficient initial information). In this case, you need to know that a brake upgrade requires more than changing the calipers to the 1975 Opel calipers alone.

You will also need the larger 1975 sized rotors and different brake hoses. Even then, it may cause a problem with clearance, and require you to get a different set of rims. It's a good combination with larger rear wheel cylinders, but that would also require installation of a proportioning valve in the hydraulic system.

11-06-2008	#6 (permalink)
Anonymous D Opeler Join Date: Aug 2004 Location: Planet Earth Posts: 502	Think Again "This would be PERFECT! You can bolt on the calipers from the 75 models and get more braking." No. You should take any advice from an online board, with a grain of salt. In this case, you are modifying the brakes, which is the most important safety system in the car. Your life, and the lives of others in your car or on the road, isn't worth risking by experimenting with results (from proceeding on a project based on insufficient initial information). In this case, you need to know that a brake upgrade requires more than changing the calipers to the 1975 Opel calipers alone. You will also need the larger 1975 sized rotors and different brake hoses. Even then, it may cause a problem with clearance, and require you to get a different set of rims. It's a good combination with larger rear wheel cylinders, but that would also require installation of a proportioning valve in the hydraulic system.