REFLECTOR: Thanks

[Brian Michalk]

For octane boost, it's 5% to 10% by weight.
For cooling, one can go upwards of 50% water/fuel.  So that's a lot of 
water for cooling, yes.  If it's for extended ground ops, then not so much.

On 06/22/2013 11:18 AM, Mark Magee wrote:
> H2O injection should help considerably toward CHT I had calculated 
> considerably more than a gallon of water to get an IO540 at WOT to 
> cruise altitudes on a warmer day.
>
> Mark B. Magee
> N34XL
> Sent from IPhone 4S
> 1COR 16:13-14
>
> On Jun 22, 2013, at 10:40 AM, Brian Michalk <michalk at awpi.com 
> <mailto:michalk at awpi.com>> wrote:
>
>> Water is an excellent octane booster, which is why some modern cars 
>> recirculate a small amount of exhaust back into the intake manifold.
>> I've been wondering about installing water injection to aid with high 
>> power operation, as well as cooling on the ground.  A one gallon tank 
>> would be good enough for maybe up to one hour of ground ops/high 
>> power ops.  Depends on the operating regime.
>>
>> On 06/22/2013 10:25 AM, Scott Derrick wrote:
>>> Not necessarily, depends on what is the replacement.  Most of the 
>>> replacements I've read about would work in any 100LL application 
>>> like turbo charged TCM's, which absolutley require 100LL.
>>>
>>> -------- Original Message --------
>>> Subject: Re: REFLECTOR: Thanks
>>> From: Brian Michalk <michalk at awpi.com>
>>> To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
>>> Date: 06/22/2013 09:02 AM
>>>> Don't forget about 100LL availability.
>>>> I know, it's like trying to time the stock market, and the phase in 
>>>> will probably be tens of years away.
>>>> If 100LL does go away, then you'll have to pull them again and go 
>>>> back to lower compression.
>>>>
>>>>
>>>> On 06/21/2013 10:46 PM, Lou Stedman wrote:
>>>>> Thanks for all who joined the conversation about the Ipad and 
>>>>> which software for flight planning was best. I have taken the 30 
>>>>> day trial for Foreflight and we will see what happens.
>>>>> I have another subject I would like to bring up about engines. 
>>>>> Yesterday, while going through my conditional inspection at my 
>>>>> local AP shop, we found aluminum shavings in the oil filter. With 
>>>>> that I elected to pull all four jugs to have a look. What we found 
>>>>> was wear of one of the piston pins and some scoring of the barrel. 
>>>>> One was very noticeable the other three were slight. Not wanting 
>>>>> to take the chance of further damage, I have elected to take them 
>>>>> into Penn Yan Aero for work. I dropped them off today and Penn Yan 
>>>>> said that at least one of the pistons would need to be replaced 
>>>>> but he thought the jugs would mill up OK. Now I have a decision to 
>>>>> make. I have always wanted to put in high compression pistons to 
>>>>> get that additional 20 HP, if that is true. I am told that the 
>>>>> increased compression will not put any extra stress on the engine. 
>>>>> What I don't know is what other concerns I should have before 
>>>>> making my decision. Would it have any effect on cooling? Do I need 
>>>>> to use a different plug? Does the higher compression have any 
>>>>> effect on starter? Any education from you engine guys would be 
>>>>> appreciated. Thanks
>>>>>
>>>>>
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>>>>
>>>>
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>>> -- 
>>> While I see many hoof marks going in, I see none coming out. It is easier to get into the enemy's toils than out again.
>>> Aesop
>>>
>>>
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>
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