Frequently Asked Questions
For what specific engine models has the FAA approved GAMIjectors?
This question is probably the most popular. So popular is it, that we have a specific section dedicated to your need. Simply visit our compatibility page for the latest FAA approval on both TCM and Lycoming engines.
What about small-bore TCM engines like the IO-360 and TSIO-360 engines in Mooneys, Skymasters, etc.?
These engines have precisely the same sort of mixture imbalances as the big-bore engines, and would benefit from GAMIjectors in exactly the same fashion. And because many IO-360 and TSIO-360 installations tend to be tightly cowled and hot-running, the reduced CHT's make possible by lean-of-peak operation will be especially valuable with these powerplants. The FAA required GAMI to go through a completely separate set of certification tests before they approved GAMIjectors for these small-bore engines. The FAA has approved the STC and GAMIjectors are now available from GAMI.
What about TCM engines with top-mounted "tuned" induction systems, like the GTSIO-520 and IO-550-G? Would they too benefit from GAMIjectors?
GAMI has instrumented and flight-tested GAMIjectors in a number of these engines. While they have less uneven mixture distortion than other TCM engines, the GAMIjectors provide noticeable improvement, although not as much as with bottom-induction engines.
What about fuel-injected Lycoming engines? Could they benefit from GAMIjectors?
GAMI has gathered data on a number of these engines, and found that injected Lycomings also have substantial mixture distribution imbalances that could be corrected with GAMIjectors, although for completely different reasons than in the TCM engines. Among other things, we've found that Lycomings manufacturing tolerances on their fuel injector nozzles are extremely broad, causing them to have significant variations in flow. GAMI now is certified for most normally aspirated Lycoming engines. GAMI has also completed FAA-Certification Testing for the turbo-charged engines and has the STC in hand. For the latest on GAMIjector engine certifications, see our compatibility page.
I'm interested in ordering a set of turboGAMIjectors for my Cessna T210. However, my GEM shows that my #4 cylinder peaks first, not #1 or #2. Will turboGAMIjectors still work on my engine?
GAMI gets questions like this all of the time. The answer is: if your bottom-induction TCM engine does not exhibit the characteristic maldistrubution pattern in which the rearmost cylinders (#1 and #2) are leaner than the others, then there's something wrong with your engine! Your engine might have mismatched, out-of-tolerance, or dirty injector nozzles. Or you might have an induction leak. GAMI has never seen a bottom-induction TCM engine with equal-flow nozzles and an airtight induction system that did not exhibit the characteristic rear-is-leanest pattern.
My engine is still under factory warranty. Will installation of GAMIjectors® on my engine void my warranty? What is TCM's position on this?
Excellent Question! TCM's official position---is that TCM will not dishonor any warrant merely because of the addition of any STC'd part or modification. This has been publicly confirmed by several TCM representatives, such as Loren Lemon, the West Coast Technical Representative. In addition with over 7,000 sets sold to date, GAMI is not aware of a single TCM warranty claim where GAMIjectors were named as a contributing factor.
They do, however, reserve the right to dishonor the warranty if they can demonstrate that the failure was caused by the modification, with the burden of proof being on TCM.
Once again, GAMI now has over 15,000 sets of GAMIjectors® and turboGAMIjectors flying, and all were sold with an absolute money-back satisfaction guarantee. To date, no GAMIjectors-related warranty claims have come up with TCM.
If you have any questions that are not answered here please contact us.