04SilveradoMykk
Full Access Member
Hey Guys,
I'm afraid this thread will be a slow build, because I'm broke. Rather I should say, I don't have the money to put into toys right now.
None the less, today I had an opportunity to pick up a '99 L31 5.7L core. Minus crank.
It's from a '99 Suburban 1500. It's a two bolt mains, virgin engine. It has not been previously machined and was replaced by a crate L31 from the original vehicle. The crank was pulled out of the block in two pieces and looks like it split due to casting flaws, after 80K miles.
The heads are going up for sale now on CL:
My plans for this engine:
4.040" bore x 3.75" stroke = 385ci
Balanced rotating assembly
Splayed 4 bolt main caps
Flat top 4vr pistons
10.5-1 static compression
Transfer over from my current engine:
Patriot 'Vortec' heads, 2.02"/1.6", 185cc Int runners
Comp XR276HR-10 cam & the rest of the Comp valvetrain
Professional Products single plane intake manifold
Speed Demon VE 650cfm
..if I feel the 650cfm is a bit small for the 385ci I'll either try to bump it up with a different mains body or different carb.
The only big purchase for this build will be the rotating assembly, splayed main caps & the machine work. It will be a while before I can even begin to order parts.
If I get my ducks in a row I should be able to pull my 357ci, transfer over the valvetrain & heads to the 385ci and get it back in and running in a weekend.
Just for fun, Desktop Dyno's estimated power output of the new engine combo:
Haha, I wish
Cheers ~Mykk
I'm afraid this thread will be a slow build, because I'm broke. Rather I should say, I don't have the money to put into toys right now.
None the less, today I had an opportunity to pick up a '99 L31 5.7L core. Minus crank.
It's from a '99 Suburban 1500. It's a two bolt mains, virgin engine. It has not been previously machined and was replaced by a crate L31 from the original vehicle. The crank was pulled out of the block in two pieces and looks like it split due to casting flaws, after 80K miles.
The heads are going up for sale now on CL:
My plans for this engine:
4.040" bore x 3.75" stroke = 385ci
Balanced rotating assembly
Splayed 4 bolt main caps
Flat top 4vr pistons
10.5-1 static compression
Transfer over from my current engine:
Patriot 'Vortec' heads, 2.02"/1.6", 185cc Int runners
Comp XR276HR-10 cam & the rest of the Comp valvetrain
Professional Products single plane intake manifold
Speed Demon VE 650cfm
..if I feel the 650cfm is a bit small for the 385ci I'll either try to bump it up with a different mains body or different carb.
The only big purchase for this build will be the rotating assembly, splayed main caps & the machine work. It will be a while before I can even begin to order parts.
If I get my ducks in a row I should be able to pull my 357ci, transfer over the valvetrain & heads to the 385ci and get it back in and running in a weekend.
Just for fun, Desktop Dyno's estimated power output of the new engine combo:
Haha, I wish
Cheers ~Mykk
