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06-01-05, 09:20 AM
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Pulsation Damper versus the Banjo Bolt Modification
I have just read (again) a great thread https://www.rx7club.com/2nd-gen-archive-72/skeptic-banjo-bolt-pd-elimination-mod-395021/ concerning this modification. I have done this mod to both of my 88 S4 N/A's. After carefully reading the thread, I can see both sides of the argument but would like to share what I did that was an additional modification to sort of "make up" for the romoval of the Pulsation Damper.
It is a simple additional modification in addition to replacing the PD with a Banjo Bolt. What I did was on the fuel line running from where the PD used to be, I coiled about a foot of extra fuel line to act as a "diaphragm" as it would absorb the so called pulasations. I also coiled some fuel line coming out the the secondary rail.
My reasoning behind this is the fact that the PD contains a SMALL diaphragm to absorb and level out these shock waves and the extra coiled loose footage of the extra fuel line would absorb or level out perhaps at least as much of those vibrations..
So far so good. Again I can see pro's and con's on both sides but had chosen to do the Banjo Bolt Mod about a year ago on both cars with the extra fuel lines.
I would however be interested in opinions of that modification of additional coiled fuel lines.
It is a simple additional modification in addition to replacing the PD with a Banjo Bolt. What I did was on the fuel line running from where the PD used to be, I coiled about a foot of extra fuel line to act as a "diaphragm" as it would absorb the so called pulasations. I also coiled some fuel line coming out the the secondary rail.
My reasoning behind this is the fact that the PD contains a SMALL diaphragm to absorb and level out these shock waves and the extra coiled loose footage of the extra fuel line would absorb or level out perhaps at least as much of those vibrations..
So far so good. Again I can see pro's and con's on both sides but had chosen to do the Banjo Bolt Mod about a year ago on both cars with the extra fuel lines.
I would however be interested in opinions of that modification of additional coiled fuel lines.
Last edited by ddub; 06-01-05 at 10:03 AM.
