5.3 on propane help

Eddyj · Sep 17, 2015

Anyone want to make a list of what is needed for this starting with a LS with no top end.

rajincajingt · Sep 17, 2015

Eddyj said:
Anyone want to make a list of what is needed for this starting with a LS with no top end.

do you have a propane system already?

Eddyj · Sep 17, 2015

Yep on an old school 350.

onepieceatatime · Sep 17, 2015

Re:

I'm guessing some mounts and a carb LS intake? I'm sure I'm missing something

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Eddyj · Sep 17, 2015

The msd box is self contained? You still use coil packs? What sensors are needed? Do you still use ecm?

Jduck · Sep 17, 2015

Eddyj said:
The msd box is self contained? You still use coil packs? What sensors are needed? Do you still use ecm?

http://www.msdignition.com/Products/Ignitions/Distributorless/Ignitions/6010_-_MSD_6LS_Ignition_Controller_for_LS1-LS6_(24_tooth_crank_trigger)_Engines.aspx

rajincajingt · Sep 18, 2015

Eddyj said:
The msd box is self contained? You still use coil packs? What sensors are needed? Do you still use ecm?

Eddyj said:
Yep on an old school 350.

My process was long...

Th400 flex plate from WOD. ARP flex plate bolts
Mini starter to clear the dshaft
Mast baffled pan and pan gasket with accumulator an connections

Accumulator with turn on valve
Gauges plug in with the adapters
Alternator needs a plug and resistor to wire, summit and jegs
Do whatever you want for an air filter, you can reuse the OG
I don't have my belt part number but the AC compressors apparently don't make good air sources

Had to fab Engine mounts to existing hangers

Exhaust, WOD has nice small Sanderson headers. Sealed right up! I had to build a new y pipe

You have to add a steam connection to your radiator or plumb up a surge tank for the steam management... See bila vista les cooling article
The propane evaporator water lines plug up nice to the heater hide nipples on the pass side of the block. You'll probably need a step up fitting for the bigger nipple
The edelbrock intake has mounts for msg box, but it leaves it open to the engine bay. Inner fenders is a must or tuck it under the dash. My IMPCO 425 bolted right up.

It DOES NOT come with gaskets and it takes LS2 intake gaskets. ARP head bolts. Not sure those stock intake bolts can be reused

The MSD box needs 12v. Ignition. Ground. Cam position, crank position, MAP sensor is optional,
The MSD outputs are two pigtails of coil packs, and tach
I opted for new coil wires and plugs

Make sure the motor is grounded good
Add fluids
Turn key
Take it around the block for a spin

Enjoy throttle response and awesome fuel economy or the rock solid bottom end that just begs for forced induction

blaisetd · Sep 18, 2015

MSD box is stand alone. You need the crank, cam and map sensors, carb intake (there are a few
Different ones) and the stock or aftermarket coil packs.

Eddyj · Sep 18, 2015

Nice write up. With first hand experience. :dblthumb:

rajincajingt · Sep 18, 2015

here is a couple of vids with the set up in use:

ingrid's revenge v notch
https://youtu.be/VECT8quTHek

bailey's boulders
https://youtu.be/LavZa5e1v-s

i've been super impressed with the engine. not much of a power gain, but its definitely on power MUCH quicker so throttle responce is awesome, and the fuel efficiency is incredible. with my SBC an 8gal tank would not last all day. this last trip to HS, i ran a good bit of the park on one tank. one tank lasted all day and half way into the morning of the next. i wheeled the rest of the day on a new tank and it lasted to lunch on the saturday. the SBC would need a solid 4 tanks for a 3 day wheeling trip. no full throttle hill assaults, but a lot of trail time and a lot of fire roads.