Are the 85-86 pistons "quiet" enough to use knock sensors?
02-18-2020 | 07:05 PM
#31
Thread Starter
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Joined: May 2012
Posts: 4,976
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From: Thousand Oaks California
They're all group 1 pistons so getting a few extra wont be too hard. Or I could have the valve reliefs mirrored on all 8 pistons and drop the CR a bit so it's happier on pump gas.
It seems like there is enough room on the piston head and it would help when boosting the engine at some point.
I don't think the edges would cause hot spots and pre-ignition issues, but I could be wrong.
It seems like there is enough room on the piston head and it would help when boosting the engine at some point.
I don't think the edges would cause hot spots and pre-ignition issues, but I could be wrong.
02-19-2020 | 11:16 PM
#32
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Joined: Feb 2005
Posts: 15,230
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From: Anaheim
They're all group 1 pistons so getting a few extra wont be too hard. Or I could have the valve reliefs mirrored on all 8 pistons and drop the CR a bit so it's happier on pump gas.This might work. Calculate the compression ratio and see where you are at.
It seems like there is enough room on the piston head and it would help when boosting the engine at some point.
I don't think the edges would cause hot spots and pre-ignition issues, but I could be wrong.
It seems like there is enough room on the piston head and it would help when boosting the engine at some point.
I don't think the edges would cause hot spots and pre-ignition issues, but I could be wrong.
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The Forgotten On (02-20-2020)
02-20-2020 | 12:11 AM
#33
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Joined: May 2012
Posts: 4,976
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From: Thousand Oaks California
If it is around 9.5:1 or so (after figuring in an extra set of valve reliefs) I will be happy. I intend to run it on pump gas, 87 if possible like the 81 originally used. I like a fast flame front
