Hi Jeff,

The ceramic coating would benefit the exhaust as it protects from corrosion 
however, it also acts as an insulating cover to not only prevent heat escaping 
into the cowling area but also keeps the exhaust gasses hotter and thus less 
dense which aids exhaust flow. Better exhaust flow = better engine breathing = 
more RPM & HP.

Brad
________________________________
From: KRnet <[email protected]> on behalf of Jeff York via KRnet 
<[email protected]>
Sent: 12 November 2019 02:26:18
To: KRnet
Cc: Jeff York
Subject: Re: KR> Very Quiet - N6399U No Longer for Sale - Exhaust Project

Larry,

My exhaust was standard mild steal from Great Plaines.  So the extra 200
rpm gain I got after having Jet Hot ceramic coat the exhaust and gain in
rpm was exact same set up. Same carb, same prop, same plugs. I cant really
explain how just cerami coating the exhaust gained 200 rpm. Unless possibly
I was not getting a true full throttle prior.

Jeff York

Jeff York

On Mon, Nov 11, 2019, 7:03 PM Joel LaRock via KRnet <[email protected]>
wrote:

> Thats great to hear Sam,many more years of enjoyment
>
> On Mon, Nov 11, 2019, 08:27 Flesner via KRnet <[email protected]>
> wrote:
>
> > On 11/10/2019 10:59 PM, Jeff York via KRnet wrote:
> > > Odd thing is, I gained 200 rpm after reinstalling the ceramic coated
> > > exhaust.
> > >
> > > Jeff York
> >
> >
> >
> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> >
> > Was that with the same setup and only the coating change?  When my mild
> > steel pipes got thin I went with stainless steel.  Only way to go.  I
> > haven't changed an exhaust on my land vehicles since the early 1990's.
> >
> > Larry Flesner
> >
> >
> > _______________________________________________
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