Well.... $800,$1000... I think this included installation and an engine analyzer... but the club sold that plane... now has a new 2003 Ovation... but I couldn't fly it anyway if I still lived there. Min 750 hours reqd for insurance, plus too much $$ in that tier.
Auto engines use O2 analyzers, which don't like leaded gasoline. My '88 Z car has 5 computers in it. At least 1 manages the engine timing and injectors. -- Ross On Wed, 25 Feb 2004 13:41:42 +0200, Stephen Jacobs <ask...@microlink.zm> wrote: >>>>>>> I agree with your endorsement of GAMI injectors. The flying club > Mooney turbo 231 6 cylinder got them at a cost of 1K per injector > ($6000). And you could cruise at 170Kts at altitude at around 9gph > after leaning. > > > Isssssh - Someone's having you on here, that must have been the budget > for the whole fleet. Have a peek on the GAMI site > (http://www.gami.com/) > > TCM /Lyc 6 cyl = $800/set on exchange ($950 turboGami's) > Lyc 4 Cyl = $700/set on exchange. > > > I suspect your club Mooney may have received the whole deal - $6k would > cover the Gami's and a very nice graphic engine analyzer with parameter > settings and alarms on EGT and CHT (all 6); oil temp /press /fuel flow > (HP readout) fuel tracking /OAT and obviously - the whole ROP /LOP > mixture tracking /processing and indication. > > It is however not about the 15% plus fuel saving (not that this will > hurt)- it is all about taking the motor to TBO without hassles or even a > top o/haul. More so, this is about reliability during daily operations. > > I know of a pair of TIO 470's that went 200 hrs over TBO without any > problems, including turbo's or a top. Only hassles I recall related to > the exhausts - this was related to the Gami's. > > My motor (IO-540 K1A5 - 300hp) was a typical midlife Lyc when I bought > the bird - I know, I had a look with a boroscope (sp). Fair > accumulation of carbon and BB's at and below 65. 300 hrs later it was > almost clean inside and all the BB's were over 70. That got my > attention. > > 400 hrs later the motor failed due to a failure in the accessory drive > train and the bird was written off. (Nobody hurt) I got to see inside > the cylinders - clean as a new engine, very little C, certainly a great > deal less than 400 hrs earlier. No burnt vales as the OWT's promised. > > Clean burning means no un-burnt whatever - keeps the cylinders clear, > valves (stems and seats) clear and efficient, cooling works better, > plugs last my plugs were still fine after 400 hrs). > > The next bonus was range - my Cherokee 6 carried 84 gals and sipped away > at 10 gph at (typically) 12,500' (my favourite level over Africa) and > still cracking 135KTAS - you figure the range with only one take off, it > is agonizing (but very handy) > > The short story is that someone has painstakingly figured out a set of > different size nozzles for each of the engine models that they cater > for. > > This is antiquated and crude by modern (auto) standards, but it does > mean that we can address the differences in gas flow patterns that cause > different amounts of fuel to be delivered to the various cylinders in > the traditional old airplane engine. That is why, when you lean an > aircraft engine (slowly), it will initially run rough as a first > indication. It runs rough simply because each cylinder is receiving a > different amount of power (it is getting more /less fuel than its > neighbour). > > A set of GAMI's will iron this out (mostly) - Gami will re-issue you > with more accurate nozzles if you have an engine monitor and provide > them with specific info on your engine. > > All of the above is obviously irrelevant to most modern auto engines, > their systems are decades ahead and probably have real-time info from > each pot telling a processor to change the mixture for almost each > stroke. Issssshh > > Steve J > jayq...@microlink.zm > > > > > _______________________________________ > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html -- Using M2, Opera's revolutionary e-mail client: http://www.opera.com/m2/
