Do you have a '72 914 made after # 473 29 10933?

[alphacrimedog]

I am looking for owners of 1972 914's made late in the model after VIN # 472 29 19032. If you have one manufactured after this serial number and your vehicle is still in basic stock configuration I have some questions about your front brake set-up.

1. According to Dr. 914, George A Hussey Jr. in his book " 914, 700 Tech Tips" he writes on page 52, " The 70-72 914/4 brake rotor up to chassis number 472 29 19032, was fitted as a solid rotor with14mm holes drilled lug bolt holes. The very late 72 and 73 models were fitted with a tall hatted four lug solid rotor with a road wheel centering disc built into the middle." Does anyone else with a 72 made after # 19032 have the rotors WITHOUT the "tall hatted road wheel centering rotor? I have a late 72 ( made after #19032) and it has the early style rotor without the centering hub.

2. Does anyone with a 72 made after # 19032 have early style calipers and rotors? ( Conventional wisdom says it should all be "late" stuff)

3. If you have early Pedrinis fitted to your car, does that mean that you also have to have early rotors and therefore early calipers as well? I understand that early Pedrinis will not fit on later style front rotors.

Dave at Pelican has been trying to help me sort this out. He suggests there were 3 rotors for the 72 914/4. One for the early car having both early rotors and calipers. A second rotor made for the late style caliper( After serial # 19032 ) made WITHOUT the road wheel centering hub, and a third one for late calipers WITH the road wheel centering hub. Early Pedrinis would only fit ( without modification of some sort) the early rotor and the second one without the centering hub. Later Pedrinis would only fit the late rotor (Late 72 after #19032 and 73-76). According to his Porsche parts book, crica 1980, he shows 3 different rotors for the 914/4.
Part # 411.407.705 was used through late 72 up to # 19032.
Part # 411.407.075 "A" was used up through early 1973, chassis # 4572902510
Part # 411.407.075 "B" was used until the end of the 76 model.

1. Can anyone confirm the existence of 3 rotors? Are there any owners out there who have the 411.407.075 "A" rotor? ( I am assumming that this rotor fits late calipers but does not have the centering hub requiring the use of "early Pedrini" wheel.

I trust what Dave is saying but it is different from what Dr. 914 says about the 72 rotors. And a few other learned Porsche people also say there are only two types of rotors. I would appreciate any feedback from 1972 owners whose car was manufactured after the magic number #19032 to let me know exactly what their car came equipped with regarding rotors and calipers. Early or Late?

[sacook]

>>>>1. According to Dr. 914, George A Hussey Jr. in his book " 914, 700 Tech Tips" he writes on page 52, " The 70-72 914/4 brake rotor up to chassis number ............"


Alpha, nice siting of resources, is that MLA, or APA , format lol

.....geeese I need a brake from school lolol. One more final tomorrow.

[alphacrimedog]

Its late and I cant type anyway. I was supposed to be asking about cars built after serial # 19033.

[LateApex]

I believe that's MLA style.

[ejm914]

My '72 had VIN #19703, the late calipers and non-centering rotors. When I bought the car it had 90K on it, no way of knowing if those were the rotors it left the factory with.

[Dave at Pelican Parts]

BTW, the late wheels fit early rotors as well.

As far as I can tell, the only time this makes any kind of difference is when you order replacement rotors (or calipers). The pads are all the same, the rebuild kits are all the same, the brake lines after mid-1971 are all the same.

It may be that the late rotor superceded the middle one. It wouldn't be the first time that VW/Porsche, in their near-infinite wisdom , decided to drop a low-volume part and required several other parts to be changed as well.

--DD

[philinjax]

If you have the taller hat front rotors with the raised ring around the center hub, then you have the late rotors. The late rotors won't fit the early calipers. The early rotors won't fit the late calipers.
There is about a half inch difference between the early and late caliper mountings surfaces (on the struts) to the center of the rotor slots on the calipers.
Phil

[S. Frankiewich]

My '72 has a VIN of 20696. It's been a long time since the original rotors were on it. I've always used late-style rotors with the centering hat but I also use steel wheels so it doesn't matter. I have a set of Pedrinis that I'll install someday. Only one of the wheels is machined for late-model rotors. I figure when the time comes I'll get a new set of front rotors and have the hat machined off. That way all of the wheels will fit. Either style of wheel will fit on the back.

Steve
Stockton, CA

[philinjax]

Here is a pic. of the early and late model calipers.
Phil

[alphacrimedog]

ejm914 has the same set up that my car has. Late calipers but no high hat centering ring on his rotors. Anyone else have the same? I know one other example does not prove anything beyond a resonable doubt, but it looks like Dave at Pelican is right about there being 3 different rotors. So if I have to replace my rotors, I guess that Ill have to buy late rotors and have the centering ring machined off if I want to keep my Pedrinis?

[alphacrimedog]

I guess that if I am concerned about this topic with all of its intricacies, I must have been bitten by the Porsche bug in a big way.

Ok, so the moral of the story is that there are three rotors, and two calipers, and ifin you want to switch to BMW calipers without machining them then you need the earlier caliper, regardless of whether you have non-hubcentric rotors. Right?