Building a fresh 360ci engine for mileage & power

Propane, Butane, LPG, GPL, C3H8, C4H10
storm
Posts: 648
Joined: Wed Jan 10, 2007 10:10 pm
Location: NSW, Australia

Re: Building a fresh 360ci engine for mileage & power

Post by storm » Wed Sep 05, 2018 2:37 am

6mm fuel line? wow I fit 10mm to all the conversions I do. I dare say it is, combined with the lockoff, a restriction to fuel flow.

In my experience, road tuning, 10mm is a good size and the 2 lockoffs we use most in Australia are the next major restriction. Check the link in my signature for a little more information, unfortunately I don't have access to a reliable dyno to verify and provide print outs but that is what I have found so far.
Every job is a self-portrait of the person who did it. Autograph your work with excellence.

Fuel flow requirements calculations viewtopic.php?f=5&t=1638

User avatar
BigBlockMopar
Posts: 382
Joined: Sun Sep 02, 2007 3:29 pm
Location: Netherlands
Contact:

Re: Building a fresh 360ci engine for mileage & power

Post by BigBlockMopar » Wed Sep 05, 2018 5:02 pm

We can get 8mm line and (tank)lockoff parts here easily. That would be my first upgrade to do.
The current lockoff is a joke and seems to be ment for small engined cars, as I found its internal diameter is even smaller than the fuelline feeding it.
Lockoff shown here: viewtopic.php?p=12216#p12216

Actually, upgrading the fuelline was already in the plans when I get the time to install the vapour injection system 'next to' the current Impco E.
Plan is to have the digital ECU start the engine with the Impco-system, and switch over to vapour injection when some heat is in the cooling system.

Also plan to install a large Impco F-830 filter-canister which will also hopefully cure the drop in power during hard-acceleration with less than half-full LPG tanks.
https://www.bigblockmopar.com
'73 Dodge Dart - 360ci - 11.3:1cr
MegaSquirt + HEI 7-pin timing control - Edelbrock AirGap - Cold Air Intake
IMPCO E / 425 mixer - A518 OD-trans - 3.55 gears - 225/50/17" tires.

User avatar
BigBlockMopar
Posts: 382
Joined: Sun Sep 02, 2007 3:29 pm
Location: Netherlands
Contact:

Re: Building a fresh 360ci engine for mileage & power

Post by BigBlockMopar » Thu Sep 13, 2018 3:04 pm

I collected together all the videoclips of the 11 dynoruns and added the results per run in the clip.
Also tried to recall what was changed before each run, but my note-taking skills weren't up-to-par during the "dyno-fun" so only a few runs have info mentioned.
I also have screenshots of the digital MegaSquirt ECU, showing RPM, LOAD, COOLANT-temp, IGN Advance, DWELL, Intake temp and a bit more, but didn't include them into this video as I didn't feel it would make much sense to most.

https://www.youtube.com/watch?v=Ut3cHopC4Ko

:idea:
https://www.bigblockmopar.com
'73 Dodge Dart - 360ci - 11.3:1cr
MegaSquirt + HEI 7-pin timing control - Edelbrock AirGap - Cold Air Intake
IMPCO E / 425 mixer - A518 OD-trans - 3.55 gears - 225/50/17" tires.

Post Reply