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These posts are from John Sachs on HTT:
From: MSN Nicknamejohnsachs (Original Message) Sent: 9/9/2005 2:52 PM
Just had a customer drop off an '06 A motor for a 106" kit.Quickly looking over the heads:
Exhaust looks real efficient,port is similar to the HTCC exhaust.
Intake looks like they dropped (wrong direction) the port about .060".
Haven't flowed them yet,maybe this weekend.Less work to be done on the exhaust,and a lot more to be done on the intake.
John
From: MSN Nicknamejohnsachs Sent: 9/10/2005 3:34 PM
Well,I guess I have to admit that the '06 intake port is,after all,pretty good.
I flowed the stock intake port,and it was about 12 cfm better than the '99 - '05 stock intake ports.Actually,I've seen some inexpensive ported big valve heads that didn't flow much better.
Looking into the port,it seems Harley has blended the seat insert area,smoothed the area around the guide boss,and created a nice short side turn.The 1.808" intake valve is seating at the very edge of the valve.
John
From: MSN Nicknamejohnsachs Sent: 9/11/2005 12:57 PM
It's HOT out,looks like rain,so after church,I decided to do an at random intake port flow shootout.
The figures are at 10",heads have some miles,have NOT been bead blasted, and all look equal in terms of residue (small amount).
(Bruce)The only inlet guide I could come up,that would work on all the heads,to stay consistent with,was an adjustable 11/2" long billet velocity stack I made years ago.The '06 SE catalog says they offer flanges that will work with early to late,and late to early.I'll check with HD tomorrow.
The figures will reflect valve lifts of: .300" .400" .500" .560"
The heads were rear heads: 2002, 2005 ,2006.
REAR 2006 head: 107.1 cfm,124 cfm, 126.5 cfm, 126.5 cfm.
REAR 2005 head: 101.5 cfm, 114.8 cfm, 115.5 cfm, 115.5 cfm.
REAR 2002 head: 93.8 cfm, 113.4 cfm, 118.4 cfm, 117.6 cfm.
Obviously you must be very careful if you're going to fluff up the ports in the '06 heads.It's real easy to hurt the flow by going in there with a rock or sanding drum to remove material.
John
From: MSN Nicknamejohnsachs (Original Message) Sent: 9/9/2005 2:52 PM
Just had a customer drop off an '06 A motor for a 106" kit.Quickly looking over the heads:
Exhaust looks real efficient,port is similar to the HTCC exhaust.
Intake looks like they dropped (wrong direction) the port about .060".
Haven't flowed them yet,maybe this weekend.Less work to be done on the exhaust,and a lot more to be done on the intake.
John
From: MSN Nicknamejohnsachs Sent: 9/10/2005 3:34 PM
Well,I guess I have to admit that the '06 intake port is,after all,pretty good.
I flowed the stock intake port,and it was about 12 cfm better than the '99 - '05 stock intake ports.Actually,I've seen some inexpensive ported big valve heads that didn't flow much better.
Looking into the port,it seems Harley has blended the seat insert area,smoothed the area around the guide boss,and created a nice short side turn.The 1.808" intake valve is seating at the very edge of the valve.
John
From: MSN Nicknamejohnsachs Sent: 9/11/2005 12:57 PM
It's HOT out,looks like rain,so after church,I decided to do an at random intake port flow shootout.
The figures are at 10",heads have some miles,have NOT been bead blasted, and all look equal in terms of residue (small amount).
(Bruce)The only inlet guide I could come up,that would work on all the heads,to stay consistent with,was an adjustable 11/2" long billet velocity stack I made years ago.The '06 SE catalog says they offer flanges that will work with early to late,and late to early.I'll check with HD tomorrow.
The figures will reflect valve lifts of: .300" .400" .500" .560"
The heads were rear heads: 2002, 2005 ,2006.
REAR 2006 head: 107.1 cfm,124 cfm, 126.5 cfm, 126.5 cfm.
REAR 2005 head: 101.5 cfm, 114.8 cfm, 115.5 cfm, 115.5 cfm.
REAR 2002 head: 93.8 cfm, 113.4 cfm, 118.4 cfm, 117.6 cfm.
Obviously you must be very careful if you're going to fluff up the ports in the '06 heads.It's real easy to hurt the flow by going in there with a rock or sanding drum to remove material.
John