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360 on the dyno
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Greyhounds_AMX View Drop Down
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Joined: Nov/14/2009
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Points: 1268 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Greyhounds_AMX Quote  Post ReplyReply Direct Link To This Post Posted: Nov/29/2018 at 9:51pm
Thanks for digging that out. Do you know why they picked that particular exhaust lobe? I didn't see that one on their 904 lobe list.
1968 AMX 390 w/T5
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jcisworthy View Drop Down
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Points: 2805 		Post Options Post Options   Thanks (0) Thanks(0)   Quote jcisworthy Quote  Post ReplyReply Direct Link To This Post Posted: Nov/30/2018 at 4:02am
I picked the lobes. They are both on the .904 lobe list
Specializing in dyno services, engine building, and cylinder head porting

rbjracing.com
Phone Number 518-915-3203
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AMX1972 View Drop Down
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Points: 161 		Post Options Post Options   Thanks (0) Thanks(0)   Quote AMX1972 Quote  Post ReplyReply Direct Link To This Post Posted: Dec/03/2018 at 8:11pm
It would be interesting to see what effect removing the wall in the plenum on the air gap would do to your numbers and side to side air fuel...
1972 Javelin AMX T/A Red 360/4 speed

1968 AMX "The Pied Piper" "Cam Only" 390/727 1/8th mile bracket racer on E-85. 10.92@121.9 mph.
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jcisworthy View Drop Down
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Points: 2805 		Post Options Post Options   Thanks (0) Thanks(0)   Quote jcisworthy Quote  Post ReplyReply Direct Link To This Post Posted: Dec/04/2018 at 5:02am
I milled a cut out about 1/4" down for about 75% of the length of the wall in this intake
Specializing in dyno services, engine building, and cylinder head porting

rbjracing.com
Phone Number 518-915-3203
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AMX1972 View Drop Down
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Points: 161 		Post Options Post Options   Thanks (0) Thanks(0)   Quote AMX1972 Quote  Post ReplyReply Direct Link To This Post Posted: Dec/05/2018 at 10:06am
Nice work! I enjoy seeing 360 successes
1972 Javelin AMX T/A Red 360/4 speed

1968 AMX "The Pied Piper" "Cam Only" 390/727 1/8th mile bracket racer on E-85. 10.92@121.9 mph.
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Points: 1718 		Post Options Post Options   Thanks (0) Thanks(0)   Quote BassBoat Quote  Post ReplyReply Direct Link To This Post Posted: Dec/11/2018 at 9:52am
lots of info in this post.  Thanks for sharing!  I'm curious about why you chose a smaller than stock exhaust valve and how you got that to work.  Did you install seats?  My only experience with 1.6 valves was bad.  Three or 4 reseded to the point they beat up the seats and I had to go to a 1.76 valve when the heads were freshened up.  There were other issues on that engine and with that builder, so might not necessarily be the whole story.  But it would scare me to do it.  
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jcisworthy View Drop Down
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Points: 2805 		Post Options Post Options   Thanks (0) Thanks(0)   Quote jcisworthy Quote  Post ReplyReply Direct Link To This Post Posted: Dec/11/2018 at 12:38pm
I use 1.6 valves in factory heads using 1.625 or smaller. The larger 1.68 valve heads I use 1.65 valves and do not have issues with them. 
Specializing in dyno services, engine building, and cylinder head porting

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Phone Number 518-915-3203
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WesternRed View Drop Down
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Points: 5796 		Post Options Post Options   Thanks (0) Thanks(0)   Quote WesternRed Quote  Post ReplyReply Direct Link To This Post Posted: Dec/11/2018 at 6:49pm
Are you re-cutting the valve seat angle as part of the process or still using factory 30 deg setup?
I've finally given up drinking for good...........now I only drink for evil.
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jcisworthy View Drop Down
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Points: 2805 		Post Options Post Options   Thanks (0) Thanks(0)   Quote jcisworthy Quote  Post ReplyReply Direct Link To This Post Posted: Dec/11/2018 at 7:00pm
I re cut using 45* seats with all my iron heads. I also use 11/32 or 8mm stem valves in all my heads also. 
Specializing in dyno services, engine building, and cylinder head porting

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Phone Number 518-915-3203
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WesternRed View Drop Down
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Points: 5796 		Post Options Post Options   Thanks (0) Thanks(0)   Quote WesternRed Quote  Post ReplyReply Direct Link To This Post Posted: Dec/11/2018 at 10:28pm
Cool, that’s pretty much as expected.
I've finally given up drinking for good...........now I only drink for evil.
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