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Smoking engine |
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Greyhounds_AMX
AMC Addicted Joined: Nov/14/2009 Location: Kansas City Status: Offline Points: 1268 |
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Lash caps maybe?
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1968 AMX 390 w/T5
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Boris Badanov
AMC Addicted Joined: Dec/14/2013 Location: NH USA Status: Offline Points: 4209 |
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Don't take that much material off the seat, you are VERY likely to
have cracks later! In FACT (as I look at the blue print) you are likely to break through just cutting that much material away. I.M.O. DONT DO IT! |
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Gremlin Dreams
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Trader
AMC Addicted Joined: May/15/2018 Location: Ontario Status: Offline Points: 6882 |
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I don't know your setup but You may be able to install these:
Really depends on your"about" dimension, but 0.050" on the spring is not going to make huge difference on it's performance. Shimming and geometry is more important once you are this close, my opinion.
Edited by Trader - Aug/06/2019 at 7:05am |
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Mikel
AMC Apprentice Joined: Jul/15/2014 Location: CT Status: Offline Points: 85 |
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Thank you guys.
Trader - Those spring retainers, would they work with a 3/8" valve stem? If they do, I suppose removing 0.050" would not be too risky. |
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Greyhounds_AMX
AMC Addicted Joined: Nov/14/2009 Location: Kansas City Status: Offline Points: 1268 |
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Mikel,
What is the part number of your springs and of your retainers?
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1968 AMX 390 w/T5
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Mikel
AMC Apprentice Joined: Jul/15/2014 Location: CT Status: Offline Points: 85 |
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Trader
AMC Addicted Joined: May/15/2018 Location: Ontario Status: Offline Points: 6882 |
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I really don't know if the retainers would work.
The spring number 74600K1, when I search comes up with dual and single springs with 7 and 10 degree retainers??? The 3/8" valve size seems the only thing consistent. Maybe just having a bad Google Day! I would suggest asking the Lunati Tech. And I would not machine for the 0.050", your going to have slightly higher seat and open pressures and not within spring bind. Again, ask Lunati Tech.
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Greyhounds_AMX
AMC Addicted Joined: Nov/14/2009 Location: Kansas City Status: Offline Points: 1268 |
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There are single groove 10 degree locks available that will give +0.050", Lunati 77116-16. That would be an easy way to get a little bit additional room.
With those in play you'd still be 0.093" from coil bind and most people look at 0.060" as the minimum.
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1968 AMX 390 w/T5
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Mikel
AMC Apprentice Joined: Jul/15/2014 Location: CT Status: Offline Points: 85 |
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These are double springs. From memory, these had a 1.5" OD and came with 10 deg retainers. Thanks.
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Mikel
AMC Apprentice Joined: Jul/15/2014 Location: CT Status: Offline Points: 85 |
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Thanks. I'll have to see if they offer the same in four grooves!
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