Hi All,

I have a question regarding the importance of the muffler, and the pressure nipple to the fueltank...

I want to try and preserve some scale looks to a Corsair, which is running an OS 90 Four-stroke and to do this, I would like to exclude the muffler and make something more scale OR, to put a flex pipe routed directly to where one of the scale exhausts would exit. Is there anyway to do this, with a suitable substitute for the pressure nipple....can I install the nipple on a straight pipe and still get sufficient pressure, or will I need to install a pump of sorts?

Thanks again..

PS, noise pollution is notan issuewhere I am from, so the only purpose the muffler is serving right now is for fuel pressurisation.

In the early engines , 4 strokes ran exhaust pipes (no muffler) and a pressure nipple. I don't know the guys name or web site ( i'm sure someone else does) but he now sells custom dual exhaust for 4 strokes for Mustangs and spitfires. Maybe he does Corsairs and OS 91's.

Corsair used a 18 cylinder radial Pratt & whitney Double Wasp. It used a ring type header to collect the exhaust, which exited out 2 header tubes on both sides the cowl at 4 o'clock and 8 o'clock positions.
I have seen the other headers for the war birds that had V-12s in them You can get something similar to the Corsair but it`s for the radial engines. The header wraps around the engine a lot like the big ones do, but you still have to add collectors and exhaust headers.
Good luck.

Hi,
have a look at www.keleo-creations.com that could give you an idea or two.
Dave :^)

Speedster & Dave,

Yep, that is kind of what I am looking for, but I was hoping not to buy anymore parts :-) f I had to summarise, the question would be:
Can I take a straight-through pipe, drill a hole in it, tap the nipple in, and just have the pipe exit the cowl without any muffler?
The main concern of mine is the tank pressurisation.

There is little space in the cowl for the part mentioned on your site Dave, but it does look cool. It also means I would have to mount the engine inverted, and I was hoping to keep it at 90 Deg.

Thanks for all the help

Regards, Andy