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Forum: Installation Discussion 03-15-2013, 02:55 PM
Replies: 3
Views: 18,198
Posted By dtilman
Weight of original Exhaust on B19?

There are two different general configurations of exhaust systems on the Beech aircraft. Generally, aircraft older than 1970 have a firewall mounted muffler. 1970 and later have a smaller muffler...
Forum: Installation Discussion 02-26-2013, 04:28 PM
Replies: 3
Views: 23,520
Posted By dtilman
Re: Installation issue with cowl flap on Glastar

Installation notes on Glastar: Cowl Flap hinge conflict:

We just spoke with a customer who has a Glastar with a fairly standard installation Lycoming O-320, factory standard exhaust and standard...
Forum: C177RG exhaust development (Public) 06-14-2011, 05:48 PM
Replies: 6
Views: 37,329
Posted By dtilman
Re: Lycoming IO 390 engine and Power Flow

Excellent! Did you fly with the exhaust before you changed the engine? If so - Can you comment on what kind of performance gains you saw with the engine change and then the Power Flow or was it all...
Forum: General Performance 10-23-2010, 02:49 PM
Replies: 2
Views: 18,799
Posted By dtilman
Re: High cylinder head temps - up to 450F

Note: we worked with the poster and here is a brief summary for everyone's benefit.

It appears that the "official" specification for how much fuel should be flowing on a particular...
Forum: Installation Discussion 10-23-2010, 02:33 PM
Replies: 2
Views: 25,007
Posted By dtilman
Re: Maintenance Issue / Tailpipe hanger strap

Further investigation and testing into the higher incidence of exhaust straps breaking has revealed the following:

1) Diamond factory installed Power Flow Exhausts were using a silicone material...
Forum: Aviat Husky 09-06-2010, 01:03 PM
Replies: 1
Views: 19,887
Posted By dtilman
Re: Final (#) of deposits received

We ended-up with 26 confirmed deposits on the Aviat Husky program, after asking initial deposit holders to confirm their deposits based upon our actual testing results, rather than our initial...
Forum: Beech Owner Comments 09-06-2010, 12:51 PM
Replies: 1
Views: 16,209
Posted By dtilman
Re: Another Power Flow Story

Outstanding! Thank you for posting. Very happy to hear of your results.
Forum: Robinson R22 09-06-2010, 12:48 PM
Replies: 0
Views: 17,510
Posted By dtilman
Talking R22 + Power Flow - Now FAA Approved

August 26, 2010

FAA AWARDS STC TO POWER FLOW TUNED EXHAUST FOR R22 MODELS WITH 160 HP ENGINES

Daytona Beach, FL – Following several years of development and testing, the FAA has awarded an STC...
Forum: Robinson R22 06-01-2010, 07:21 AM
Replies: 0
Views: 7,924
Posted By dtilman
R22 in Certification Testing

We have received official Testing authorization from the FAA for our STC project on the R22 (Lycoming O-320) and have started on all the required tests. We hope to have all the testing completed by...
Forum: C177RG exhaust development (Public) 05-05-2010, 09:44 PM
Replies: 28
Views: 43,987
Posted By dtilman
Re: EASA Certification

We haven't made it past the preliminary discussion stages on EASA Validation of the C177RG exhaust system, for several reasons.

It really boils down to how many people are ready to commit to...
Forum: Aviat Husky 11-20-2009, 05:10 PM
Replies: 0
Views: 9,257
Posted By dtilman
Blog started - must login to see

We started a progress report on the Aviat Husky. You must login in order to see the forum. It is called "Husky Exhaust Development."
Forum: Beechcraft Bonanza 11-20-2009, 04:33 PM
Replies: 0
Views: 29,670
Posted By dtilman
Blog started - must login to see

We have started a progress update blog on the Beechcraft Bonanza. You must login (or register to login) in order to see the forum called "Bonanza Exhaust Development".
Forum: C177RG exhaust development (Public) 07-18-2009, 12:48 PM
Replies: 4
Views: 14,071
Posted By dtilman
Re: # of C177 RG deposits received (updated frequently)

In case you aren't aware, Power Flow received FAA Approval (STC) on the C-177RG exhaust in December 2008.

As of July 15, 2009, we have shipped approximately 40 exhaust systems and by the end of...
Forum: C177RG exhaust development (Public) 07-18-2009, 12:39 PM
Replies: 6
Views: 37,329
Posted By dtilman
Re: Latest Update

The Power Flow Exhaust for the C177RG should fit and offer similar boosts in performance on the IO390 as it does for the IO360. We personally haven't done such an installation just yet, but we...
Forum: C177RG exhaust development (Public) 09-30-2008, 05:25 PM
Replies: 1
Views: 9,878
Posted By dtilman
September 2008 update

C177RG owners:

A version of this update just appeared in the CFO Digest in time for the 40th anniversary of the Cardinal.

Dear Cardinal Flyers:

Our congratulations on the 40th anniversary...
Forum: Installation Discussion 05-29-2008, 03:03 PM
Replies: 0
Views: 18,564
Posted By dtilman
Background on Beech Sundowner testing - why the mixture is so critical

Power Flow for the Beech Sundowner

You might recall that in 2007, Power Flow Systems, Inc. postponed the release of a tuned exhaust system for the Beech Sundowner series of aircraft equipped with...
Forum: Muffler 05-03-2008, 12:06 PM
Replies: 0
Views: 10,340
Posted By dtilman
Does the PFS have a flame tube?

Does the PFS have a flame tube?

This was asked on another user group after a pilot experienced a large loss of power using a traditional exhaust.

In a traditional exhaust, gases are shot at...
Forum: C177RG exhaust development (Public) 04-18-2008, 05:55 PM
Replies: 28
Views: 43,987
Posted By dtilman
Photos of System and test results

Many thanks to everyone that came to see the world premier of the C177RG tuned exhaust prototype at Winter Haven last week.

We are really happy with the response of the RG owners to our initial...
Forum: C177RG exhaust development (Public) 03-06-2008, 03:02 PM
Replies: 4
Views: 14,071
Posted By dtilman
Forum: C177RG exhaust development (Public) 03-06-2008, 02:07 PM
Replies: 28
Views: 43,987
Posted By dtilman
Weight of the Power Flow

Let me point out that the stock exhaust we weighed came in at a little over 26 pounds. If our production unit stays about the same as the prototype, it is possible that the PFS exhaust will be the...
Forum: Installation Discussion 02-08-2008, 01:23 PM
Replies: 0
Views: 14,727
Posted By dtilman
Cessna Short Stack vs. Classic - difference?

The only measurable performance difference between the short stack vs our classic (long pipe) are found only on the Cessna 172 and 177. This does not apply to Grummans and Piper installations.
...
Forum: FAQs 01-24-2008, 03:02 PM
Replies: 0
Views: 13,090
Posted By dtilman
How do you Lean for best power ? (fixed pitch)

Question: I want to evaluate the performance and improvement with a Power Flow exhaust as compared to the Standard exhaust. How do you lean for best power on my fixed pitch aircraft?

Answer:
...
Forum: FAQs 01-24-2008, 02:53 PM
Replies: 0
Views: 10,000
Posted By dtilman
No performance improvement - fixed pitch

Question: I installed a Power Flow on a 68 Cardinal with a Lycoming 150 HP engine, and a fixed pitch propeller. Everyone I know with the exhaust loves it and sees a dramatic improvement. I...
Forum: Installation Discussion 01-18-2008, 04:00 PM
Replies: 1
Views: 17,080
Posted By dtilman
180 HP conversions - Prop Pitch

For any of our customers, we always recommend first flying with the Power Flow installation on your propeller WITHOUT changing the pitch, in your typical flying conditions. The amount of improvement...
Forum: Installation Discussion 01-18-2008, 03:59 PM
Replies: 1
Views: 17,080
Posted By dtilman
180 HP Conversions C172 - prop pitch

Question sent in from a customer via email

I have ordered a 0-360 A4M overhaul 180 hp conversion for my skyhawk 172M from Penn Yan aero and have also ordered the powerflow exhaust from you.
...
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