255 cam in a 96"?
Thread Starter
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Cruiser
Joined: Nov 2018
Posts: 128
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From: Mississauga
255 cam in a 96"?
Hello Everyone,
Do you need or should you get compression releases if installing the SE 255 camin a 96"? I have read and been told yes and been told no from many including mixed answers from various MOCO service Departments.
I do have the SE compensator and was told by a tech that the compensator is the real issue and in a 96" it would be no issue with the SE compensator?
Do you need or should you get compression releases if installing the SE 255 camin a 96"? I have read and been told yes and been told no from many including mixed answers from various MOCO service Departments.
I do have the SE compensator and was told by a tech that the compensator is the real issue and in a 96" it would be no issue with the SE compensator?
Seasoned HDF Member
Joined: Oct 2019
Posts: 10,841
Likes: 7,474
From: OH
Assuming you change nothing but the cam your nominal C/R is 9.3 :1 the actual is 9.02:1 ( Big Boyz Compression Calculator)
I.M.O. releases would not be required.
IF you are increasing compression and removing the heads anyway it might be smart and economical to have them installed while it`s apart.
I.M.O. releases would not be required.
IF you are increasing compression and removing the heads anyway it might be smart and economical to have them installed while it`s apart.
Ultimate HDF Member
Joined: Jun 2009
Posts: 6,899
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From: OH
There have been a lot of people that have run them without compression releases. I ran Andrews 48's in mine for a couple of seasons without releases. The main issue with the 255's were hot starts. The 96 is a pretty low compression set up stock.
If your worried about it that much why not consider an S&S EZ-Start cam?
If your worried about it that much why not consider an S&S EZ-Start cam?
Thread Starter
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Cruiser
Joined: Nov 2018
Posts: 128
Likes: 8
From: Mississauga
Assuming you change nothing but the cam your nominal C/R is 9.3 :1 the actual is 9.02:1 ( Big Boyz Compression Calculator)
I.M.O. releases would not be required.
IF you are increasing compression and removing the heads anyway it might be smart and economical to have them installed while it`s apart.
I.M.O. releases would not be required.
IF you are increasing compression and removing the heads anyway it might be smart and economical to have them installed while it`s apart.
I would be interested in how that big boys calc works and what I need to know to use it.
at what CCP do you start to need compression releases?
Seasoned HDF Member
Joined: Jan 2011
Posts: 157,534
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From: Michigan 15 Minutes East Of Hell
There have been a lot of people that have run them without compression releases. I ran Andrews 48's in mine for a couple of seasons without releases. The main issue with the 255's were hot starts. The 96 is a pretty low compression set up stock.
If your worried about it that much why not consider an S&S EZ-Start cam?
If your worried about it that much why not consider an S&S EZ-Start cam?
Seasoned HDF Member
Joined: Oct 2019
Posts: 10,841
Likes: 7,474
From: OH
Google the calculator and just fill in the blanks e-z p-z ( even I can do it)
Note the actual working compression shown at bottom of chart
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Cruiser
Joined: Nov 2018
Posts: 128
Likes: 8
From: Mississauga
I think I have narrowed it down to the 48H or the 255.
The ez-start thing just seems lseems other part time worry about breaking. Especially since I tend to keep my bikes a long time. My last bike I had for 12 years.
The ez-start thing just seems lseems other part time worry about breaking. Especially since I tend to keep my bikes a long time. My last bike I had for 12 years.
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Seasoned HDF Member
Joined: Jan 2011
Posts: 157,534
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From: Michigan 15 Minutes East Of Hell
Once again ... the Easy Starts work well and are very durable ... your peace of mind is important too .. good luck
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Seasoned HDF Member
Joined: Jun 2017
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From: Granville New York
A friend has the 255s in his 2010 street glide with a vance and hines pro pipe, heavy breather and a good dyno tune and that bike runs really good for a stock 96 incher. He has k7ck back once in a while on a hot start but nothing unbearable.
