Wimmer Compression Releases
Thread Starter
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Road Master
Joined: Jan 2012
Posts: 1,090
Likes: 243
From: Maine
That would require a very deep relief area cut that would be next to impossible to do well by hand.
Elite HDF Member
Joined: Jul 2008
Posts: 4,741
Likes: 45
From: Indian Land, SC
Not having one to see first hand but looking at your pictures, why did you have to grind the area on the head that you did? That caused the unit to angle down which is causing it to hit the bolt and the fins.
Last edited by HDV-GLIDE; Mar 16, 2013 at 10:47 AM.
Road Warrior
Joined: Aug 2006
Posts: 1,575
Likes: 7
From: Wisconsin
I tried to install the Wimmer compression release on my brother's Street Bob this past week. The pictures shown below are exactly what I ran into as well. After plenty of grinding, it still didn't fit and certainly never sealed up.
The single plug they sent was an Autolite. The plug did have the same thread pattern and fit in the hole as the stock HD plug but did not fit a 5/8" spark plug socket. WTF? Also, they didn't even send the other plug for a matched set? Yeah, the kit came with 1 spark plug.
After screwing around with the half baked contraption for about 45 minutes, I packed it all back up and told my brother to send it back.
My opinion is that its a good idea, but they need to make one that fits a twin cam engine and not some half fitting, grind here, mis-matched spark plug piece of crap they sent. If you think you want one of these things, do yourself a favor and save your $150.
The single plug they sent was an Autolite. The plug did have the same thread pattern and fit in the hole as the stock HD plug but did not fit a 5/8" spark plug socket. WTF? Also, they didn't even send the other plug for a matched set? Yeah, the kit came with 1 spark plug.
After screwing around with the half baked contraption for about 45 minutes, I packed it all back up and told my brother to send it back.
My opinion is that its a good idea, but they need to make one that fits a twin cam engine and not some half fitting, grind here, mis-matched spark plug piece of crap they sent. If you think you want one of these things, do yourself a favor and save your $150.
The email quoted below is my experience with the Wimmer compression relief; I’m still waiting to hear back from them.
Hi Lee,
This past weekend I got my bike out of storage and attempted to install the Compression Release I recently purchased and ran into some problems. Due to the angle of the tube that exits the base it looks like I would need to not only grind the lip off the plug bore edge (which I did) but also grind a large portion of the cooling fins and the top of the head bolt….is this normal? I was under the impression this was a pretty straightforward install that may require a LITTLE grinding to work, having to grind in 3 places was not what I thought needed to be done.
I have attached pictures that show what I am talking about. Notice that the MCR is still not sitting flush even after taking a considerable amount of material from the plug and rounding the corners of the release. In fact, if I do take enough material to make it sit flush then it will hit the head bolt and I could possibly need to grind a relief area in 2 cooling fins.
Is the angle on the MCR I have correct? Do you make one with a steeper angle?
Please advise.
Thanks
-Mike
Cooling Fin Contact:
Head bolt Contact:
Material Removed:
Still Not Sitting Flush:
Hi Lee,
This past weekend I got my bike out of storage and attempted to install the Compression Release I recently purchased and ran into some problems. Due to the angle of the tube that exits the base it looks like I would need to not only grind the lip off the plug bore edge (which I did) but also grind a large portion of the cooling fins and the top of the head bolt….is this normal? I was under the impression this was a pretty straightforward install that may require a LITTLE grinding to work, having to grind in 3 places was not what I thought needed to be done.
I have attached pictures that show what I am talking about. Notice that the MCR is still not sitting flush even after taking a considerable amount of material from the plug and rounding the corners of the release. In fact, if I do take enough material to make it sit flush then it will hit the head bolt and I could possibly need to grind a relief area in 2 cooling fins.
Is the angle on the MCR I have correct? Do you make one with a steeper angle?
Please advise.
Thanks
-Mike
Cooling Fin Contact:
Head bolt Contact:
Material Removed:
Still Not Sitting Flush:
Last edited by equandt; Mar 19, 2013 at 09:25 PM.
Thread Starter
|
Road Master
Joined: Jan 2012
Posts: 1,090
Likes: 243
From: Maine
I tried to install the Wimmer compression release on my brother's Street Bob this past week. The pictures shown below are exactly what I ran into as well. After plenty of grinding, it still didn't fit and certainly never sealed up.
The single plug they sent was an Autolite. The plug did have the same thread pattern and fit in the hole as the stock HD plug but did not fit a 5/8" spark plug socket. WTF? Also, they didn't even send the other plug for a matched set? Yeah, the kit came with 1 spark plug.
After screwing around with the half baked contraption for about 45 minutes, I packed it all back up and told my brother to send it back.
My opinion is that its a good idea, but they need to make one that fits a twin cam engine and not some half fitting, grind here, mis-matched spark plug piece of crap they sent. If you think you want one of these things, do yourself a favor and save your $150.
The single plug they sent was an Autolite. The plug did have the same thread pattern and fit in the hole as the stock HD plug but did not fit a 5/8" spark plug socket. WTF? Also, they didn't even send the other plug for a matched set? Yeah, the kit came with 1 spark plug.
After screwing around with the half baked contraption for about 45 minutes, I packed it all back up and told my brother to send it back.
My opinion is that its a good idea, but they need to make one that fits a twin cam engine and not some half fitting, grind here, mis-matched spark plug piece of crap they sent. If you think you want one of these things, do yourself a favor and save your $150.
I really would like this to work...BUT I don't want to hack the head up and then find it does not seal correctly 100% of the time.
Elite HDF Member
Joined: Jul 2008
Posts: 4,741
Likes: 45
From: Indian Land, SC
It appears that they never tried it on stock HD heads but on aftermarket motors i.s. S & S, etc. If they had, they would have seen the issues and possibly corrected them.
Yes, for $150, you should get the CR and two plugs.
Glad that inner voice told me to sit back and wait for feedback before ordering one.
Yes, for $150, you should get the CR and two plugs.
Glad that inner voice told me to sit back and wait for feedback before ordering one.
Thread Starter
|
Road Master
Joined: Jan 2012
Posts: 1,090
Likes: 243
From: Maine
Well the only suggestion I got from Wimmer was to grind away until it fits (no chit). So I said screw it, Im going to make it work. The pictures give an idea of what it took to make it sit flush, certainly not a plug-n-play device like their video implies. I asked for pictures of them installed on a stock TC96 head and was told they did not have any.
Anyway, be advised it takes a lot of grinding for these to work.
Anyway, be advised it takes a lot of grinding for these to work.
Elite HDF Member
Joined: Jul 2008
Posts: 4,741
Likes: 45
From: Indian Land, SC
I'm sure when people Goggle Wimmer Compression Releases and stumble upon this thread, not many will be sold to HD owners.
I guess I was right, they never tried these on a stock HD head because if they did, they would have designed them differently.
It's still not to late for them to do this and if they do make them fit a HD head perfectly without any grinding, they would probably sell a **** lot of them. I know I would be in line for one......
I guess I was right, they never tried these on a stock HD head because if they did, they would have designed them differently.
It's still not to late for them to do this and if they do make them fit a HD head perfectly without any grinding, they would probably sell a **** lot of them. I know I would be in line for one......
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