help with IO-470 timing

Aircraft powered airboat discussion.
Post Reply
GMAC 76
Site Supporter - V
Site Supporter - V
Posts: 1267
Joined: Sun Jan 04, 2009 11:12 pm
Location: LAKE PLACID FL.... LAKE ISTOKPOGA

help with IO-470 timing

Post by GMAC 76 »

what is the best timing degree to set for an IO-470 using automotive fuel our 520 tag says 22BTC but the tag on the 470 is missing thanks for the help

User avatar
hostile
Southern Airboat Member
Posts: 306
Joined: Wed Aug 26, 2009 11:01 pm
Location: South FLA Dammit!

Re: help with IO-470 timing

Post by hostile »

Depends on which dash number engine. It varies from 20BTC to 26BTC. I'm showing an IO-470G with 8:1 comp using 91 octane at 26BTC. There is a IO-470H at 8.6:1, 100 octane at 20BTC and an I0-470J with 7:1, 80 octane at 22BTC.

User avatar
glades cat
Site Supporter - III
Site Supporter - III
Posts: 3047
Joined: Mon Jan 22, 2007 2:36 pm
Location: Miami, Fl

Re: help with IO-470 timing

Post by glades cat »

Speedwheelie set my io-470-j @ 25.
"Leave a legacy...Preserve the irreplaceable"
12' x 7' sled built by Scorpion, Cont. O-470-K, 72" Whisper Tip
Rigged by Gladescat & sons in 2009

gruprgetr
Site Supporter - V
Site Supporter - V
Posts: 2089
Joined: Mon May 02, 2005 10:05 am
Location: st.cloud,fl

Re: help with IO-470 timing

Post by gruprgetr »

what gladescat said :bounce: :bounce: :bounce:
(SWAMP GAS)
IF YOU PISS SOMEONE OFF MEANS THEY HEARD YOU
AIRBOATS DONT SPREAD HYDRILLA

AIRBOATS DONT CAUSE ANIMOSITY- PEOPLE DO!!
PROTECT YOUR FUTURE WEAR A PFD AND VOTE!!
on a dark calm night ya can hear the cryaker scratchin on your poly

Post Reply

Return to “Aircraft Power Only”