Home > VansAirForceForums

- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics

Go Back   VAF Forums > Main > RV General Discussion/News
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Thread Tools Search this Thread Display Modes
Old 06-23-2018, 05:58 PM
steve91t steve91t is offline
Join Date: Nov 2010
Location: Huntersville, NC
Posts: 138

You canít crack the valve just a little? Otherwise this thing wonít help my scenario I described in my original post.
Reply With Quote
Old 06-23-2018, 11:48 PM
airguy's Avatar
airguy airguy is offline
Join Date: Oct 2006
Location: Garden City, Tx
Posts: 4,474

Originally Posted by steve91t View Post
You canít crack the valve just a little? Otherwise this thing wonít help my scenario I described in my original post.
No. This valve will not help your situation, trying to pass X amount of fuel FWF and returning Y amount back to the tanks while sending Z amount to the fuel divider. You will need an EFI installation for that.

Sorry, but there's no "easy button" on this one.
Greg Niehues - PPSEL, IFR, Repairman Cert.
Garden City, TX VAF 2019 dues paid
N16GN flying 380hrs and counting! Built an off-plan 9A with too much fuel and too much HP. Should drop dead any minute now.
Reply With Quote
Old 06-24-2018, 01:55 PM
lr172 lr172 is offline
Join Date: Oct 2013
Location: Schaumburg, IL
Posts: 3,585

Originally Posted by steve91t View Post
Can the bypass valve be cracked open on the ground with the engine running?
Depends how you set it up. My return is pre-servo, not post servo. I drilled an orifice that would flow about 8-10 GPH through the return circuit with the return valve open. I designed it this way to insure that enough flow would be remaining from the fuel pump to support full power on the engine if I accidentally left it open, which I have done far too many times. The mech fuel pump will flow 35-45 GPH, so I have plenty of margin at full power. My injectors are in the primer ports and I will get stumbling when I go to idle on final and like to have to return open on landing to help reduce this when the ambients get hot.

My return starts at the FI servo, not the fuel pump to help take more heat out of the fuel. However, my situation is a bit unique and need to shed more heat due to the injector locations on the hot side of the baffles.

RV-6A / IO-320, Flying as of 8/2015
RV-10 in progress

Last edited by lr172 : 06-24-2018 at 02:20 PM.
Reply With Quote
Old 06-25-2018, 07:56 PM
Smilin' Jack Smilin' Jack is offline
Join Date: Jan 2011
Location: Cumming, Georgia
Posts: 853
Default IO360 hotbstart

Ibhad my share of problems starting after a lot of stuff trials and errors installed a slick start.

She starts every time hot or cold

Alot of folks have Ideas but putting enough spark on the plugs helps the engine start

Cold starts. Fuel oump on for about 2 seconds
Mix rich theottle 1/4 open firesnoff on about the secound blade

Hot starts
Blip the fuel pump a nani second
mixture idel cutoff
Throttle about half open
Crank as reduce throttle toward idle as engine fires at some point during the throttle reduction slowly put mixture in

Thats it works fine if the battery is good

Pull a couple botton plugs and check for led deposits. If you see leadnin the plugs lean aggressively on the ground

Check injector nozzles for trash. It will cause your 4!cylinder engine to really miss behave

Hope part of this helps
Smilin' Jack & Anita Hunt
N507H RV7, KJZP Jasper, GA
Retired Corporate Pilot CFI-AI, MEL
CE500, LRJT, HS25, C650, SBJT, CL60
Hunt Aviation, LLC.
Pilot Service, IPC's Biennials.
Comm Glider
Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

All times are GMT -6. The time now is 04:58 AM.

The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.