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  1. #1
    Join Date
    Apr 2009
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    363

    LS-3 approved by FAA for Cesna 172

    Well...local junkyards are gonna be a bit more baren. Cars, Boats, and now Aircraft. Pretty wild.



    "What happens when you put a Corvette engine in the Cessna 172? First, you use 1/2 the fuel, and SECOND, youíre not using avgas that is half again the cost of mogas, and you donít pay road tax, a better than 67% savings. Nor do you add oil each flight or so.

    Quiet Aviation (QA, previously Orlando Helicopter Airways) has received the FAA approval by way of an Issue Paper to install the GM LS3 430hp all aluminum V8 in the Cessna Models 172I thru 172M. This Issue Paper establishes the Basis or method in which this retrofit is to be made that when completed will become a Supplemental Type Certificate (STC) which can then be installed in the 172ís and Skyhawks. QA will begin immediately in defining the details, documenting, implementing, and testing this first ever chance to greatly modernize these airplanes and boost their performance with an advanced and proven automotive engine."






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    You can't be slick to a can of oil


  2. #2
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    a cheaper more efficient Cessna! wait till we start putting prochargers on thoses

  3. #3
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    Jan 2013
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    Cypress, California
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    Interesting. Is the radiator enclosed in the sheetmetal under the oil pan? Just wondering how that part works. Also the motor is rated at 430hp at what 5500rpm? So the gear reduction is like what 2:1? Thanks for the interesting post.

  4. #4
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    thats really interesting and neat to see.
    I am not useless, I can still be used as a bad example!


    -Bob

  5. #5
    Join Date
    Jun 2001
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    I wonder why there are two different versions with the engine reversed.
    VaporWorx. We Give You Gas http://www.vaporworx.com

  6. #6
    Join Date
    Apr 2004
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    Quote Originally Posted by CarlC View Post
    I wonder why there are two different versions with the engine reversed.
    The only difference is the intake orientation. Cant see if they actually have the cold air intake complete in first pic. Has to go in backwards so they can drive the planetary off the flywheel.
    Mike Redpath
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  7. #7
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    nice, i like the fuel line routing..... not sure but I have have contracted a tubing fetish.
    MrQuick ΜΟΛ'ΩΝ ΛΑΒ'Ε

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  8. #8
    Join Date
    Apr 2004
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    Quote Originally Posted by Ash View Post
    Well...local junkyards are gonna be a bit more baren. Cars, Boats, and now Aircraft. Pretty wild.

    "What happens when you put a Corvette engine in the Cessna 172? First, you use 1/2 the fuel, and SECOND, you’re not using avgas that is half again the cost of mogas, and you don’t pay road tax, a better than 67% savings. Nor do you add oil each flight or so.

    Quiet Aviation (QA, previously Orlando Helicopter Airways) has received the FAA approval by way of an Issue Paper to install the GM LS3 430hp all aluminum V8 in the Cessna Models 172I thru 172M. This Issue Paper establishes the Basis or method in which this retrofit is to be made that when completed will become a Supplemental Type Certificate (STC) which can then be installed in the 172’s and Skyhawks. QA will begin immediately in defining the details, documenting, implementing, and testing this first ever chance to greatly modernize these airplanes and boost their performance with an advanced and proven automotive engine."
    Never heard the term "issue paper". I think the terminology meant here is the FAA has granted approval to relicense the Cessna in experimental R&D category to allow testing and development of the engine package. Trust me when I say this is a LONG LONG way from getting an STC. It can take years and STUPID money to get this approved. I know of an engine swap my uncle did using ALL FACTORY Cessna parts going from 145hp to 210hp and took 10 years and a DER to get approved.

    fuel burn is misleading considering rpm is going to be higher than normal range for cars in order to take advantage of the horsepower. If you flip over to the details on the powerplant on their web page, it does use a 2:1 gearbox, and they have derated paower to 180 hp so as not to exceeed Cessna structural limits. The one big no no I see is the use of ethanol gas. Any use of ethanol gas is forbidden in airplanes as it lowers the vapor point of the gas and could easily vaporlock with the right under cowl temps and air density. Also ethanol corrodes aluminum and guess what Cessna fuel tanks, valves, a lines are made from?
    Mike Redpath
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    Musclerodz.com

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  9. #9
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    Aug 2004
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    Quote Originally Posted by MuscleRodz View Post
    Never heard the term "issue paper". I think the terminology meant here is the FAA has granted approval to relicense the Cessna in experimental R&D category to allow testing and development of the engine package. Trust me when I say this is a LONG LONG way from getting an STC. It can take years and STUPID money to get this approved. I know of an engine swap my uncle did using ALL FACTORY Cessna parts going from 145hp to 210hp and took 10 years and a DER to get approved.

    fuel burn is misleading considering rpm is going to be higher than normal range for cars in order to take advantage of the horsepower. If you flip over to the details on the powerplant on their web page, it does use a 2:1 gearbox, and they have derated paower to 180 hp so as not to exceeed Cessna structural limits. The one big no no I see is the use of ethanol gas. Any use of ethanol gas is forbidden in airplanes as it lowers the vapor point of the gas and could easily vaporlock with the right under cowl temps and air density. Also ethanol corrodes aluminum and guess what Cessna fuel tanks, valves, a lines are made from?
    All I took from that is that I should buy one and slap a big ol dirty snail on it and have some fun!
    Matt
    72 Chevelle 6.0l lsx/th400, twin turbo precision 67mm billets, built 12 bolt, C6 Z06 brakes, Front suspension from SC&C, Fabricated spindles, SPC uppers and lowers, Coilovers, A1000 fuel, etc etc.

  10. #10
    Join Date
    Oct 2012
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    LS-3 approved by FAA for Cesna 172

    That's cool. I think turbos were created originally for planes. Because the air is less dense but I'm guessing the computer will correct those issues now. But I don't really have a clue, sounds good though.

  11. #11
    Join Date
    Mar 2012
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    97
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    What he said... These comments are spot on...

    Quote Originally Posted by MuscleRodz View Post
    Never heard the term "issue paper". I think the terminology meant here is the FAA has granted approval to relicense the Cessna in experimental R&D category to allow testing and development of the engine package. Trust me when I say this is a LONG LONG way from getting an STC. It can take years and STUPID money to get this approved. I know of an engine swap my uncle did using ALL FACTORY Cessna parts going from 145hp to 210hp and took 10 years and a DER to get approved.

    fuel burn is misleading considering rpm is going to be higher than normal range for cars in order to take advantage of the horsepower. If you flip over to the details on the powerplant on their web page, it does use a 2:1 gearbox, and they have derated paower to 180 hp so as not to exceeed Cessna structural limits. The one big no no I see is the use of ethanol gas. Any use of ethanol gas is forbidden in airplanes as it lowers the vapor point of the gas and could easily vaporlock with the right under cowl temps and air density. Also ethanol corrodes aluminum and guess what Cessna fuel tanks, valves, a lines are made from?

  12. #12
    Join Date
    Mar 2008
    Posts
    986
    i suppose the FAA would frown on a set of long tube headers and a 3" X pipe...

    towards the end of that page, it says that the conversions will be done starting sometime in 2011.. wonder what became of it?

  13. #13
    Join Date
    Nov 2011
    Location
    Lowell MI
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    50
    What would happen if you gave it the whole 430 HP ?

  14. #14
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    Jan 2013
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    Cypress, California
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    Quote Originally Posted by SPDMETL View Post
    What would happen if you gave it the whole 430 HP ?
    I think the problem is propeller speed. If one had a gear reduction unit to the propeller then that would be possible. That would also mean you could use a different propeller that would take a bigger bite out of the air. Then there are things to consider such as engine rpm and fuel consumption.

  15. #15
    Join Date
    Aug 2012
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    Dawsonville Ga
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    Not to be picky or anything, but that is not an ls3. The rectanguler port l92 head castings that ls3's employ do not have the "freeze plugs" on the end of the heads. I'd say this is more than likely that this is an ls1. I'm actually trying to convince myself that these pictures haven't been photocropped, and this is actually fake. Hmmmmm.
    Scott
    70 Chevelle on a custom chassis with coilovers, RED sleeved 434Ē with Mamo 265ís, Mast electronics, built t56, wilwood 6/4, 12 bolt 3:73, bla bla bla...
    my build thread:http://www.lateral-g.net/forums/showthread.php4?t=39631