Backfire when letting off at trail speeds

[T-Nytro]

I have a Nytro with MCX turbo. I put a tunnel dump on it (no muffler) and now it backfires when I let off the throttle and coast. I know this is from not enough backpressure. Cruising A/F is 13.5. I leaned it out on the bottom end to get the proper A/F ratios. It doesnt bother me but will this damage the turbo at all?

Thanks

 

[Ted Jannetty]

I have a Nytro with MCX turbo. I put a tunnel dump on it (no muffler) and now it backfires when I let off the throttle and coast. I know this is from not enough backpressure. Cruising A/F is 13.5. I leaned it out on the bottom end to get the proper A/F ratios. It doesnt bother me but will this damage the turbo at all?

Thanks

Backfiring on Decel is usually because it is Too Lean on Decel OR there is an exhaust leak ahead of the muffler.

 

[T-Nytro]

There is no muffler. I did lean it out alittle. Thanks