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103 Head Question
Engine, Fuel and Exhaust
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Oct 9th, 2012, 10:35 AM
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Warming The Wheels
Ride: 2004 Geezer Glide FLHTCI
Join Date: Oct 31st, 2007
Location: Alberta Canada & Port Charlotte Florida
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103 Head Question
Is it the same 85 cc as for all previous stock twin cam engines? Thanks, Rod |
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Oct 9th, 2012, 05:23 PM
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Moderators
 Ride: 2003 Road King
Join Date: Aug 12th, 2009
Location: Central Florida
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Re: 103 Head Question
I read somewhere that they are 85cc's but cant be sure.
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Oct 9th, 2012, 10:07 PM
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Play The Throttle
Ride: 2002 FLHT
Join Date: May 8th, 2009
Location: San Antonio, Texas
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Re: 103 Head Question
Bathtub chamber volume typically runs between 85cc-86cc but I have seen them measure as high as 89cc.
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Oct 9th, 2012, 10:54 PM
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Contributor$
Ride: FLHR 09
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Re: 103 Head Question
Quote: Originally Posted by dolt
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Bathtub chamber volume typically runs between 85cc-86cc but I have seen them measure as high as 89cc.
Like dolt said above, one of mine was very far apart of the other.. so accurate measurement is needed to get them equal... And a good head man to check... Thanks Don Doorfman... I Know of No difference in the stock heads, being either 88", 95", 96" or the 103". Same.. 85cc Looking at Big Boyz caculator, they call out for 85cc as their stock starting numbers. signed....BUBBIE
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Oct 11th, 2012, 06:51 AM
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Warming The Wheels
Ride: 1967 FLH
Join Date: Feb 27th, 2009
Location: Munnsville, N.Y.
Posts: 107
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Re: 103 Head Question
They average between 85-87 cc's.
A good cfm, for a 103-107 ci engine is right around 160 cfm, @ 10"/.600" lift. 
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"If a street Harley doesn't have torque, how much horsepower it makes, simply does not matter." |
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Oct 11th, 2012, 11:28 AM
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Warming The Wheels
Ride: 2004 Geezer Glide FLHTCI
Join Date: Oct 31st, 2007
Location: Alberta Canada & Port Charlotte Florida
Posts: 143
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Re: 103 Head Question
Thanks to all for the info.
I am slowly getting my head around all the head variations. The best, Rod |
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Oct 15th, 2012, 07:08 AM
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Warming The Wheels
Ride: 1967 FLH
Join Date: Feb 27th, 2009
Location: Munnsville, N.Y.
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Re: 103 Head Question
Quote: Originally Posted by Rod Stewart
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Thanks to all for the info.
I am slowly getting my head around all the head variations. The best, Rod Do you know of an outfit, in Edmonton, by the name of Fabmasters Ltd.?
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"If a street Harley doesn't have torque, how much horsepower it makes, simply does not matter." |
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Oct 17th, 2012, 10:55 AM
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#8 |
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Warming The Wheels
Ride: 2004 Geezer Glide FLHTCI
Join Date: Oct 31st, 2007
Location: Alberta Canada & Port Charlotte Florida
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Re: 103 Head Question
FishHunter;
I am not familiar with Fabmasters. What do they do? Harley made Screaming Eagle 103 heads for a while. Anyone know the chamber volume and valve sizes for these? Thanks, Rod |
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Oct 18th, 2012, 09:11 AM
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Play The Throttle
Ride: 2002 FLHT
Join Date: May 8th, 2009
Location: San Antonio, Texas
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Re: 103 Head Question
Quote: Originally Posted by Rod Stewart
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FishHunter;
I am not familiar with Fabmasters. What do they do? Harley made Screaming Eagle 103 heads for a while. Anyone know the chamber volume and valve sizes for these? Thanks, Rod |
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Oct 19th, 2012, 06:56 AM
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#10 |
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Warming The Wheels
Ride: 1967 FLH
Join Date: Feb 27th, 2009
Location: Munnsville, N.Y.
Posts: 107
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Re: 103 Head Question
Yes, part #'s for the particular cylinder head would aid greatly to arrive at a conclusive answer.
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"If a street Harley doesn't have torque, how much horsepower it makes, simply does not matter." |
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