OS 1.60 Issues

[Mark Hunt]

Jon,

I have the same setup.... I extended the pipe length by another 1/2" (minimum) and I mounted the kline right against the needle valve (1/2" of tubing - total) inlet.  It is very important that you keep the reg. close to the needle as well as try to isolate the reg. from hard vibration.  I wrap the reg. in a rubber band.  I am running 15%, APC 17x12, hatori header (and header extension).

I still have a hiccup if I fly around a mid-throttle, but quite rare.  It's getting hot here in TX so I've set the motor a bit rich and I'm turning approx. 8000 rpm on the ground.  I can send pics of my setup later today if you like....

(flyintexan at houston.rr.com)

Alot of guys around here in Dist 6 are running the same setup, but using a perry pump with good success as well.


Hope it helps,
Mark

P.S. I had to lean the low needle until it would barely even start, then backed off (rich) a 1/4 turn.  Now, I prime it, back flip, and its running.

  ----- Original Message ----- 
  From: JonLowe at aol.com 
  To: discussion at nsrca.org 
  Sent: Tuesday, June 01, 2004 7:09 AM
  Subject: OS 1.60 Issues


  I have a Titan, OS 1.60, Mueller header, Greve pipe, Ironbay regulator before the needle valve, OS #8 plug, running a 17x13 with 15%.   Tank is monted over the CG.  Hyde mount.  As near as I can measure around the header, I am at the length that Piedmont recommends for these pipes on their site.  Good power at full throttle, but midrange stinks, wanting to load up at 3/4 throttle, and not transition to full throttle.  Also, the mixture changes in the air, upright to inverted, going rich inverted.  I have the regulator mounted horizontally about 1.5 inches from the needle, do I need to mount it fore-aft like a Cline?  Do you think I need to extend the length of the pipe?  Any carb adjustment tricks?  I'm new to pipes, so any info will help.

  BTW, the original  pressure check valve went bad before I even got to fly it.  I got a check valve (Foremost) from my local hobby shop that seems to work, developing pressure and holding it well.  Have others had problems with the Ironbay valves?

  Thanks.

  Jon Lowe
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