OK, here are the facts. It’s a 1974 e9, so the Porsche motors are identical, as verified by my mechanic. The older e9 regulators are quite different. I think the key to installation is with the rubber stoppers that others have commented on. The reason we went to the Porsche ones is because one of the two e28 regulators that we purchased was bad. On a hunch, my mechanic purchased the Porsche ones to see if they would fit. They were identical. Height, dimensions and gear. I have the e9 shop manual that describes the installation of the window. It’s not very complete on the window installation.
E9 front window regulator.
- Thread starter Pflyer
- Start date
? The spacing for the holes? Doesn’t appear to be the same?
Just the picture?
Just the picture?
BTW, window is not in yet, so there may still be issues. Will post when complete. Headers are in and yet to be joined to stainless exhaust. When that’s done window will be installed. Also, found refurbished clock on eBay. Mine was kaput.
Good eye!
Does look like the "upper" gearbox mounting hole has the locating shoulder on the new motor and not on the old (original?) on left..
Is that same picture of "first" replacement - no difference to 2nd replacement?
Does look like the "upper" gearbox mounting hole has the locating shoulder on the new motor and not on the old (original?) on left..
Is that same picture of "first" replacement - no difference to 2nd replacement?
Can we clarify if we are taking interchange of the entire unit (regulator and motor) or just the "motor"? I have a Euro so front windows are manual (actually happy about that) but rears are motorized and slow. Would be nice to be able to swap out motors "in-situ" and leave the regulators alone. Also, for general knowledge, what does the Porsche unit cost?
The one on the right is the new one. The replacement (e28) is on the left. If you zoom in, the holes are equidistant.
Why are you not using the E28 motor which all the forum members are using?
Pittraider18
Active Member
In an earlier post in the thread, he mentioned that one of the E28 motors he had was a bad unit and his mechanic wanted to check the Porsche unit. If it does turn out to work then it opens up yet another avenue of potential replacement parts!
Thanks Pflyer, this could be very nice discovery.
Anyone, how can E28 or Porsche regulator/motor of same size and dimensions be a more powerful electrical motor?
Anyone, how can E28 or Porsche regulator/motor of same size and dimensions be a more powerful electrical motor?
matthewp
Well-Known Member
what model porsche are the motors from ?
Don’t know. They look identical. No one on this thread has been able to verify, or even hint that the different motor with the same dimensions would cause the window to shatter. No one. I’m here to find out and will post the results. My mechanic, a damn good one, at Thunder Bunny Racing says it should work.
I am working on my cnc machine I bought thru Eastwood . Just drew up cad image to cut and fabricate the regulators to mount the e28 motors. Tired of the sardine can motors, even with synthetic grease it’s just a matter of time before they tire out. I am amazed at the possibilities available from this inexpensive cnc tool. It’s a game changer for the window motor Issue .
Jack
It’s been done before, I have seen it on you tube but you have to weld cut and eyeball the fit. I thought about doing it, but waited to get the right cnc machine at the right price. I would hate to ruin an e9 regulator by trial and error .
jmackro
Well-Known Member
I'm not getting what takes CNC machining, CAD imaging, welding, etc. etc. to bolt E28 motor-gearboxes to E9 regulators. Kurt DiLimon wrote up a simple procedure 10 + years ago that's available at: https://sites.google.com/site/kdelimon/windowmotorconversion1
I have followed Kurt's directions to convert both of my front windows and have extended it a bit to do the rears as well. This involves nothing more complicated than drilling another hole and extending the motor cut-out in the regulator frame.
Last edited:
With only two bolts holding the new motor to the regulator because they don’t line up?
You don’t think that’s a problem, then ok for that. But to supplement the install with pic hose on a plastic washer, not brass instead, and the tendency the bolts have to loosen up with use is asking for it, in the long run.
Sic (pic) meant ‘pvc’