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07-26-2020, 02:51 AM | #1 |
Senior Member
Join Date: Dec 2018
Location: Berlin / Germany
Posts: 182
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Backfire in overrun mode (load change)
Hi folks, a few days / weeks ago I noticed "new" appearances of my 30s Tudor.
My manifold gaskets were burned as a result of a warped manifold, and the last time I drove this manifold I had backfiring in the exhaust (when accelerating ...). Because of the faulty seal at the time, the whole thing was so uncomfortable that I had always stepped on the gas on the way home. Now I've got a new manifold. This was completely redesigned and planned together with the intake manifold by the engine manufacturer. The whole thing installed with new seals, runs great! I also installed a seal for the rear silencer for the first time. Until then, this was backsing. I sealed the carburetor flange with Hylomar sealing paste due to the lack of a paper seal. Should also be tight. Regardless of all the new / restored seals, the "backfires" have unfortunately remained. It is now not a loud popping, but more like the turbo brawl of modern cars of higher performance classes. However, I would be interested to know where this comes from and whether / how it could be eliminated. As such, the engine runs super and quietly, pulls through occasionally, and gives no cause for complaint. Who has tips? Greetings Andy. |
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