[NSRCA-discussion] check valve with muffler pressure?

[Ron Van Putte]

On Jan 6, 2007, at 11:58 PM, Ed Alt wrote:

>
> I thinking of adding a Tetra check valve into the muffler pressure  
> line from a 1.20AZ.  The tank is just a 2 line system and the  
> system would be unregulated.  Will this cause problems with the  
> needle setting wandering due to being unregulated?  I was thinking  
> that it might work since the pressurization should be fairly low  
> compared to what would happen if it was a crankcase tap.  The  
> problems I'm trying to cure is that the needle is very unresponsive  
> right now and even with a rich setting on T/O, it's sagging a  
> little in the uplines. Right now there's no tank pressure at all,  
> so the sagging isn't a huge surprise, but the way the needle reacts  
> on the ground doesn't seem right.  So is the check valve likely to  
> help or should I leave it out?
>

I did this using a Foremost check valve in a pitts style muffler  
pressure line from a Thunder Tiger 1.20 RE.  on a 74' Extra 300.  It  
worked extremely well.  However it did require careful initial  
adjustment iof the idle and main needle valves.

Ron Van Putte