Your weber floats might be partially full of gas. Makes the float level
unstable.
> On Oct 15, 2016, at 10:30 AM, D V <explore8@outlook.com> wrote:
>
> Two races ago I went off track and bent my exhaust pipe enough to break the
> welded joint near the muffler. In the interest of time, I cut the exhaust at
> the muffler and secured the pipe to the frame.
>
> At the last race, I noticed the car would backfire at deceleration which I am
> not surprised but I also noticed a stutter around 4-5k rpm.
>
> At NOLA this weekend it is more pronounced and comes in when shifting hard
> from 3rd to 4th. After 5k, it clears up and pulls normally.
>
> It doesn't seem to be affected by turns and more related to full throttle vs
> easing into the gas.
>
> Backpressure from the loss of muffler or unrelated issues?
>
> 1300 spitfire with single Weber 40.
>
> Sent from my iPhone
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