Search found 1132 matches

by GMAC 76
Wed Apr 14, 2010 8:07 pm
Forum: Aircraft Power Only
Topic: timing a gpu
Replies: 17
Views: 1133

Re: timing a gpu

i have 2 bendix mags for gpu for sale on page 2 of the classifieds on southern airboat check them out they are beauties and ready to install and i stand behind what i sell
by GMAC 76
Wed Apr 14, 2010 6:46 pm
Forum: Aircraft Power Only
Topic: timing a gpu
Replies: 17
Views: 1133

Re: timing a gpu

thanks mr w. i understand now. i have only been working with aircraft engines for 41 years so i always listen to and greatly appericate any good advice especially from the oldtimers cause they been there and done that
by GMAC 76
Wed Apr 14, 2010 12:51 pm
Forum: Aircraft Power Only
Topic: timing a gpu
Replies: 17
Views: 1133

Re: timing a gpu

i am always wanting to learn please tell me how do you install a mag into an untimed engine so it will start and run with a timing light i undrestand the light use after the engine is running but how does it work before that?
by GMAC 76
Wed Apr 14, 2010 12:35 pm
Forum: Aircraft Power Only
Topic: H or Q for 160
Replies: 13
Views: 911

Re: H or Q for 160

my neighbor has a 320 a/v on a 11.5 gielo hull he started with an H then tried a Q went back to the H he said he could not put enough pitch in the Q to give him the push he needed at 2900 plus because of the lack of pitch the Q was louder
by GMAC 76
Wed Apr 14, 2010 12:01 pm
Forum: Aircraft Power Only
Topic: more compression???
Replies: 3
Views: 610

more compression???

i had to mill .010 off the cyl decks on my 360 lyc i am wondering how much this added to my compression over and above the starting ratio of 10:1 a little, a lot or hardly none at all what do yall think?
by GMAC 76
Tue Apr 13, 2010 11:51 pm
Forum: Aircraft Power Only
Topic: timing a gpu
Replies: 17
Views: 1133

Re: timing a gpu

skyranch has a pretty sweet idea but you need to go past whatever degree you want and then come back tothat degree in the direction of prop rotation this will take all the backlash out of the gears making your timing degree more accurate just a thought but i have seen worn gears make up to 4 degrees...
by GMAC 76
Tue Apr 13, 2010 11:02 pm
Forum: Aircraft Power Only
Topic: Prop for 0-360 200 angle valve
Replies: 8
Views: 789

Re: Prop for 0-360 200 angle valve

i started with a 70 in powershift signature series with short hub (good prop) next put q series blades on same hub 70 in (really good prop) finally put whisper tip blades 70 in on same short powershift hub (wow super prop) sold all the other blades

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