Measured my ASA, here's some numbers...
01-19-2006, 06:52 PM
#1
Teching In
Thread Starter
iTrader: (1)
Join Date: Dec 2005
Posts: 29
Likes: 0
Received 0 Likes
on
0 Posts
Measured my ASA, here's some numbers... Just installed a new ASA cam, (I know, it's a 2400 lb. endurance road racing car).
I could not find any info other than the published specs anywhere, and the cam does not come with any data whatsoever (thanks GMPP?), so I thought maybe a couple people might be interested in some additional info.
Here are the measurements I was able to take, heads off, new chain, with a degree wheel and micrometer reading the lifter. The micrometer duplicated the published specs within +/- 0.001. It would probably be wise to assume a tolerance of +/- one degree also, and use this info at your own risk.
Published specs; 226/236 @ 0.050 verified installed
0.525/0.525" verified installed @ 0.308/9" actual lift
110 degrees LSA verified installed
What I measured;
Base circle 0.760"
Intake lobe centerline 108 degrees
Exhaust lobe centerline 248 degrees
Duration at 0.006", I=282, E=292
Ramp rate = 56
I could not find any info other than the published specs anywhere, and the cam does not come with any data whatsoever (thanks GMPP?), so I thought maybe a couple people might be interested in some additional info.
Here are the measurements I was able to take, heads off, new chain, with a degree wheel and micrometer reading the lifter. The micrometer duplicated the published specs within +/- 0.001. It would probably be wise to assume a tolerance of +/- one degree also, and use this info at your own risk.
Published specs; 226/236 @ 0.050 verified installed
0.525/0.525" verified installed @ 0.308/9" actual lift
110 degrees LSA verified installed
What I measured;
Base circle 0.760"
Intake lobe centerline 108 degrees
Exhaust lobe centerline 248 degrees
Duration at 0.006", I=282, E=292
Ramp rate = 56
Last edited by RSB; 01-19-2006 at 07:45 PM.
Very interesting.... I was Guessing a Mid 50 with at least a 108ICL. 
01-19-2006, 07:06 PM
#4
TECH Regular
Join Date: Oct 2005
Posts: 430
Likes: 0
Received 0 Likes
on
0 Posts
Err... come again on that exhaust centerline? Shouldn't it be 112 with the stated 110 LSA? <Edit> Oops, I see. You measured it as ATDC on the compression stroke. Not the usual convention...
01-19-2006, 07:37 PM
#5
!LS1 11 Second Club
Originally Posted by RSB
Just installed a new ASA cam, (I know, it's a 2400 lb. endurance road racing car).
I could not find any info other than the published specs anywhere, and the cam does not come with any data whatsoever (thanks GMPP?), so I thought maybe a couple people might be interested in some additional info.
Here are the measurements I was able to take, heads off, new chain, with a degree wheel and micrometer reading the lifter. The micrometer duplicated the published specs within +/- 0.001. It would probably be wise to assume a tolerance of +/- one degree also, and use this info at your own risk.
Published specs; 225/236 @ 0.050 verified installed
0.525/0.525" verified installed @ 0.308/9" actual lift
110 degrees LSA verified installed
What I measured;
Base circle 0.760"
Intake lobe centerline 108 degrees
Exhaust lobe centerline 248 degrees
Duration at 0.006", I=282, E=292
Ramp rate = 56
I could not find any info other than the published specs anywhere, and the cam does not come with any data whatsoever (thanks GMPP?), so I thought maybe a couple people might be interested in some additional info.
Here are the measurements I was able to take, heads off, new chain, with a degree wheel and micrometer reading the lifter. The micrometer duplicated the published specs within +/- 0.001. It would probably be wise to assume a tolerance of +/- one degree also, and use this info at your own risk.
Published specs; 225/236 @ 0.050 verified installed
0.525/0.525" verified installed @ 0.308/9" actual lift
110 degrees LSA verified installed
What I measured;
Base circle 0.760"
Intake lobe centerline 108 degrees
Exhaust lobe centerline 248 degrees
Duration at 0.006", I=282, E=292
Ramp rate = 56
