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08-23-2021, 06:42 PM

#21

Quartermileman

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Drew Backlund Shotgun Mufflers

The holes are to let some exhaust go through then you adjust the springs for what rpm you want the flaps to open for racing.

If you don't or didn't have holes in the flaps, you had copies!!!

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Padraig (08-23-2021)

08-23-2021, 06:44 PM

#22

Quartermileman

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Drew Backlund Shotgun Mufflers

"Some, nor dime. Sorry. Slanted fingers on telephone keyboard."

What did you mean by this???
Jerry

08-23-2021, 07:04 PM

#23

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Quote:

Originally Posted by Quartermileman

"Some, nor dime. Sorry. Slanted fingers on telephone keyboard."

What did you mean by this???
Jerry

Alot of times i press letter next to what i try to press. Some people call it fat fingering.

08-23-2021, 07:07 PM

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Quote:

Originally Posted by Quartermileman

The holes are to let some exhaust go through then you adjust the springs for what rpm you want the flaps to open for racing.

If you don't or didn't have holes in the flaps, you had copies!!!

They looked like these

08-23-2021, 08:12 PM

#25

SFOcean

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Those pictured are generation 2; generation 1 had holes in the plate only.

08-24-2021, 12:04 AM

#26

Griff

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Quote:

Originally Posted by Quartermileman

I knew Drew quite well in the 80's when he built these.
I had a set and they didn't last long on daily use on a drag hydro.
I may have a new set in my shop

There is a guy looking for a set recently in this thread. Drew Marine 4” Shotgun Exhaust Tips

For SB's post, he meant to type SOME and not dime.

Quote:

Originally Posted by Quartermileman

The holes are to let some exhaust go through then you adjust the springs for what rpm you want the flaps to open for racing.
If you don't or didn't have holes in the flaps, you had copies!!!

The earlier ones had holes in the flappers. The later ones had holes on the bottom