<div dir="ltr">David<div><br></div><div>It is possible that your fuel pump cannot quite keep up with the fuel needed at this top limit. I don't know what pump you have fitted but the square base version or the double version give a higher flow rate.</div><div><br></div><div>Before making major changes it might be worth checking that the pump has the correct diaphragm travel.</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, 25 Jan 2021 at 16:41, David P <<a href="mailto:frogeye@porterscustom.com">frogeye@porterscustom.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>
<p>..or a momentary loss of power to the fuel pump or delivery
pressure.. or a sticking valve.. many possibilities..<br>
</p>
<div>On 1/25/2021 9:20 AM, Kees Oudesluijs
wrote:<br>
</div>
<blockquote type="cite">
<p>Some parts like i.e. the distributor or carbs are taken of the
engine when it is rebuild and then after having lain on the
shelf for months or even years are put back on the engine the
way they came off, without resetting or cleaning. <br>
</p>
<p>In the distributor are the bob weights inside the body that
regulate the mechanical advance. These need regular maintenance
(mostly forgotten) to prevent them from corrosion and sticking.
It is not seldom that these get stuck or do not move freely
which might be a cause for backfiring. Also check the plugs and
wires.</p>
<p>If the car is still on points check the dwell angle and points
condition. Also check the timing.</p>
<p><br>
</p>
<p>Kees Oudesluijs</p>
<p><br>
</p>
<p><br>
</p>
<p><br>
</p>
<div>Op 25-1-2021 om 15:57 schreef <a href="mailto:rfbegani@gmail.com" target="_blank">rfbegani@gmail.com</a>:<br>
</div>
<blockquote type="cite">
<div>
<p class="MsoNormal"><span style="font-size:14pt;font-family:Arial,sans-serif">Listeners:<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:14pt;font-family:Arial,sans-serif"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:14pt;font-family:Arial,sans-serif">I
have been driving my 67 BJ8 since rebuilding and working
on the rest of the car the past year. After installing
the new shock absorbers and the new speedo, I took the car
for a ride. With the new shocks and the new Shaved tires,
she drives like brand new car down the Tamiami Trail at
50-70 mph, so I decided to push it a little more. However
at 4000 plus rpms and about 90 mph, I was not looking so
closely at the speedo or tack, the engine back fired, so I
let off the gas and returned to normal highway speeds.
Engine ran fine all the way home. Suggestions what could
cause the backfire at high speeds?<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:14pt;font-family:Arial,sans-serif"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:14pt;font-family:Arial,sans-serif">Bob
Begani <u></u><u></u></span></p>
</div>
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