ACR's and clean up.
Road Captain
Joined: Oct 2007
Posts: 507
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From: Torrance, CA.
Got an email back from Jaime (Fuel Moto).
His reccomendation was to add the releases and use the .030 Gasket since Im sticking with my 48s. The benefits of a mild port are not going to be relevant with the 48s. Jaimes given me good advice so far.
End of the day Ill have a bump in compression and start easier which is what I wanted.
Does anyone know a good shop in Nor Cal that I can take the head to? Just to install MCRs.
His reccomendation was to add the releases and use the .030 Gasket since Im sticking with my 48s. The benefits of a mild port are not going to be relevant with the 48s. Jaimes given me good advice so far.
End of the day Ill have a bump in compression and start easier which is what I wanted.
Does anyone know a good shop in Nor Cal that I can take the head to? Just to install MCRs.
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From: Brentwood
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If you want acr’s I would suggest buying used 103 heads that already have them. Thats what I did on an 06 Ultra but I also have a Thundermax ECM on the bike so turning on the acr function and tuning was simple. Otherwise just have manuals machined into your heads like Fuel Moto suggested.
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Joined: Aug 2011
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From: SW Ohio
As Old Hippie and others have said, getting a set of 103 heads with ACRs is your cheapest route, then do your head work. The thing to remember about manual CRs is that a hot re-start at a traffic light when stalled is going to be slower, either you take the time to push them in or the motor slow cranks as it did before. It's also possible for a manual CR to become carboned up and stick open. Auto CRs are there for every start, are controlled by the ECM, provided they don't malfunction. I chose to use S&S EZ Start gear drive cams as an alternative to both. Always there, not electronic and nothing for me to do. When adjusting push rods on EZ Starts you need to make sure the exhaust PR is off the EZ Start lobe, real easy to do.
Last edited by Campy Roadie; Jan 11, 2019 at 07:21 AM.
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Outstanding HDF Member
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From: Brentwood
If you want acrs I would suggest buying used 103 heads that already have them. Thats what I did on an 06 Ultra but I also have a Thundermax ECM on the bike so turning on the acr function and tuning was simple. Otherwise just have manuals machined into your heads like Fuel Moto suggested.
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Outstanding HDF Member
Joined: May 2012
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From: Brentwood
As Old Hippie and others have said, getting a set of 103 heads with ACRs is your cheapest route, then do your head work. The thing to remember about manual ACRs is that a hot re-start at a traffic light when stalled is going to be slower, either you take the time to push them in or the motor slow cranks as it did before. It's also possible for a manual ACR to become carboned up and stick open. Auto ACRs are there for every start, are controlled by the ECM, provided they don't malfunction. I chose to use S&S EZ Start gear drive cams as an alternative to both. Always there, not electronic and nothing for me to do. When adjusting push rods on EZ Starts you need to make sure the exhaust PR is off the EZ Start lobe, real easy to do.
manual ACRs and automatic ACRs
what you are saying is manual (automatic compression releases) and automatic (automatic compression releases)
In other words ACR = Automatic Compression Release
With that said going ACR = Purchase Take Off 103 Heads which Im having trouble finding for less than $300 and then buy the harness. Probably be into it for $400 or more with shipping.
Do MCRs for like $150-175 parts and labor.
Not sure where Im saving on 103 heads??
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Joined: Aug 2011
Posts: 11,814
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From: SW Ohio
I just gotta call you out on the post.
manual ACR’s and automatic ACR’s
what you are saying is manual (automatic compression releases) and automatic (automatic compression releases)
In other words ACR = Automatic Compression Release
With that said going ACR = Purchase Take Off 103 Heads which I’m having trouble finding for less than $300 and then buy the harness. Probably be into it for $400 or more with shipping.
Do MCR’s for like $150-175 parts and labor.
Not sure where I’m saving on 103 heads??
Last edited by Campy Roadie; Jan 11, 2019 at 07:22 AM.
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From: Brentwood
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I just gotta call you out on the post.
manual ACRs and automatic ACRs
what you are saying is manual (automatic compression releases) and automatic (automatic compression releases)
In other words ACR = Automatic Compression Release
With that said going ACR = Purchase Take Off 103 Heads which Im having trouble finding for less than $300 and then buy the harness. Probably be into it for $400 or more with shipping.
Do MCRs for like $150-175 parts and labor.
Not sure where Im saving on 103 heads??
Thread Starter
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Outstanding HDF Member
Joined: May 2012
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From: Brentwood