C6 LS3 416 Build Started
Thread Starter
Teching In
Joined: Aug 2017
Posts: 29
Likes: 7
From: Mansfield, Tx
C6 LS3 416 Build Started Starting a new build on my vette. I cut my oil filter open and it was full of pretty shiny things. The poor girl died from lifter failure. I ordered a new forged short block from Thompson Motorsports yesterday and will order the long block completion parts from them in the next couple days after I figure out the cam specs.
Thompson Motorsports
Blue printed New LS3 aluminum block
ACL coated racing bearings
K1 forged crankshaft
4.000" Manley H-Heavy 4340 forged connecting rods with ARP 2000 rod bolts
Diamond or Wiseco pistons with GFX file fit rings
ARP Main Studs
Frankenstein Thompson Edition M311 11* CNC 6 bolt heads
Extreme duty stainless intake and extreme duty solid exhaust valves
Billet Rocker Rails
.660 springs
3/8 pushrods
ARP Head Studs
Melling Select High pressure oil pump
Billet adjustable timing set
Johnson 2116LSR Lifters
Trunion Upgraded Rockers
GM MLS head gaskets
Trunion Upgraded Rockers
GM MLS head gaskets
Cam is still TBD
Thompson Motorsports
Blue printed New LS3 aluminum block
ACL coated racing bearings
K1 forged crankshaft
4.000" Manley H-Heavy 4340 forged connecting rods with ARP 2000 rod bolts
Diamond or Wiseco pistons with GFX file fit rings
ARP Main Studs
Frankenstein Thompson Edition M311 11* CNC 6 bolt heads
Extreme duty stainless intake and extreme duty solid exhaust valves
Billet Rocker Rails
.660 springs
3/8 pushrods
ARP Head Studs
Melling Select High pressure oil pump
Billet adjustable timing set
Johnson 2116LSR Lifters
Trunion Upgraded Rockers
GM MLS head gaskets
Trunion Upgraded Rockers
GM MLS head gaskets
Cam is still TBD
Last edited by icanski2; Oct 1, 2019 at 03:30 PM. Reason: i cant type for crap
Thread Starter
Teching In
Joined: Aug 2017
Posts: 29
Likes: 7
From: Mansfield, Tx
One cam that was recommended by Thompson is 240/256 113 +4. That thing has 22* of overlap so I'm concerned about tuning it for drivability with my 3000 stall in my auto tranny. I'm open to recommendations. I haven't picked the cam or CR.
Thread Starter
Teching In
Joined: Aug 2017
Posts: 29
Likes: 7
From: Mansfield, Tx
I need to look into that but I'm not sure the age of my intake will allow it. It's about 7 years old. I heard the older Fasts won't allow it.
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Thread Starter
Teching In
Joined: Aug 2017
Posts: 29
Likes: 7
From: Mansfield, Tx
Pistons and compression ratio We decided on -2cc ftat tops and a 11.2 CR using the Frankenstein Thompson Edition M311 Heads. We are setting the ring gap for the possibility of adding boost sometime down the road. I haven't had a chance to talk to a tuner or Cam Motion yet about the cam. Kyle at Thompson said the have had great luck with the 240/256 113 +4 .625 .625 cam he was suggesting. The valve events on that are IVO 11*, IVC 49*, EVO 65*, and EVC 11*. 22* Overlap.
I have lurked on this board a good bit and respect the knowledge and great information it provides. I would appreciate suggestions/feedback.
I have lurked on this board a good bit and respect the knowledge and great information it provides. I would appreciate suggestions/feedback.
Banned
Joined: Jan 2019
Posts: 1,747
Likes: 100
Just Liberty castings...Btw Eric won the Race Engine Challenge with liberty heads. Name means nothing but who's doing the work. 62 I've been dealing with Chris since he basically started....you need to ask who was the 1st guy who had his Factory port Ls3 program tested @ Sam...I've got Connection's on anything dealing with cylinder heads.
Anything!
What most don't know is A Lot of parts are made overseas and get here for finishing touches.
Anything!
What most don't know is A Lot of parts are made overseas and get here for finishing touches.
Staging Lane
Joined: Jul 2019
Posts: 60
Likes: 15
Your concern with possibly not being happy with 22* of overlap and the auto with a mild converter and conservative compression leads me to think the recommend cam is to large. I would keep the long runners in the intake and call Cam Motion for a better fit
Thread Starter
Teching In
Joined: Aug 2017
Posts: 29
Likes: 7
From: Mansfield, Tx
Thank you. I spoke with the tuner who did the previous dyno tune after my cam install he he said is was too big for my needs as well.
Just Liberty castings...Btw Eric won the Race Engine Challenge with liberty heads. Name means nothing but who's doing the work. 62 I've been dealing with Chris since he basically started....you need to ask who was the 1st guy who had his Factory port Ls3 program tested @ Sam...I've got Connection's on anything dealing with cylinder heads.
Anything!
What most don't know is A Lot of parts are made overseas and get here for finishing touches.
Anything!
What most don't know is A Lot of parts are made overseas and get here for finishing touches.
Banned
Joined: Jan 2019
Posts: 1,747
Likes: 100
My only goal with Chris and factory ls3 heads was to see 800+ hp with less than 418 ci or -.080 overbore and a 8 second pass. Flyin did that and I am glad to have known him to get the results and all the information on his setup.
Thread Starter
Teching In
Joined: Aug 2017
Posts: 29
Likes: 7
From: Mansfield, Tx
I went with a Pat G. spec'd Cam Motion 8620 core cam. 240/248 .626 .626 113 +3. PNG .368 lobes. (18 deg overlap) Static 11.2:1 Dynamic 8.45:1. Those are 3/8 pushrods with Johnson 2116LSR lifters.