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Popping on overrun

7K views 28 replies 10 participants last post by  luckyduck 
#1 ·
Here's the thing, I've disabled the AI, turned my mixture screws out 2.5 turns, rejetted to 130 mains with one shim under the needle and this is my setup:

-Snorkel removed
-Unifilter air filter
-Norman Hyde togas

Why do I still get popping on overrun (deceleration?). Is it just something I have to live with with the Hydes or am I still running lean on my pilot jet?

Going from the stock 1.5 turns to the 2.5 turns on the idle mixture screws did help soften up the popping, I think. We'll see, because the popping is worse when the engine is fully warmed up than when it warming up.
 
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