REFLECTOR: Exhaust upgrade

[Richard J. Gentil]

Geoff,

We really appreciate you being the guinea pig for us. Maybe you have VOBA see if the cannot strong arm a better price for you. ;)

As for orders, if the testing is conclusive and am sure we could put a group order together and see if we can get you a kickback as well as a bulk order discount for the rest of us. 

Richard 

Sent from my iPhone 5

On May 24, 2013, at 7:13 PM, Geoff Gerhardt <geoff.gerhardt at gmail.com> wrote:

> Guys,
> 
> I've ordered a new set of pipes from Clinton at Custom Aircraft Parts.  I will be replacing my stock Velocity exhaust that are 2-1 and vent out the bottom of the cowling.  The exhaust from Custom Aircraft is a set of 4-4 pipes that will vent out the rear of the cowling into the prop.
> 
> I will collect some good data this weekend (weather permitting) of my current performance.  Hopefully by next weekend, I'll have the new exhaust mounted and can collect data with it installed.
> 
> Here's what I'm expecting:
> Clinton has indicated that going from the 2-1 stock Velocity exhaust to the 4-4 will result in a significant HP boost (12-18HP).  He thinks that the 2-1 format for an IO-360 is the worst configuration, as the exhaust pulse from one is interfering with the intake for the other cylinder.  He expects that I will see a measurable and significant increase in static RPM with this switch.
> 
> I expect my CHT's will drop.  I have pretty big holes for my existing exhaust to exit the cowl.  I think this is adding a lot of pressure to the lower cowling.  Also, venting the exhaust out the rear of the cowling will actually create a vacuum inside the cowling.
> 
> Cruise TAS?  Who knows.  We'll see if there is, indeed, some drag from the exhaust disrupting the airflow.  The added HP will help, I suppose.
> 
> If anyone has some suggestions for a test flight that will provide good comparative data, please let me know.
> 
> This exhaust system will cost me $1200.  He indicated that he would lower the price if more orders were rec'd.  He wouldn't give me a lower price by acting as the guinea pig and providing good before/after test data, but said if anyone mentioned my name, he would give me a percentage of the sale.  So, if after you see the data from my testing and you want to order a similar set of pipes from Clinton, mention my name.
> 
> Geoff
> 
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