LS3 block into my C5Z
Thread Starter
Pro
Joined: Apr 2011
Posts: 696
Likes: 7
From: Sacramento Ca
LS3 block into my C5Z
Can anybody enlighten me what I'll need to do in order to complete this swap? It'll be a LS3 based 416 so it'll have the 24x wheel on the crank... I've got my nice double roller and melling pump now, will that transfer over? What happens with the cam timing at that point? I know I'll need a MAP extender which is fine cuz I have a 102 and running long injectors with ls2 rails.. and then I'll need the knock sensor extenders cuz they're on the sides of the block now...
Racer
Joined: Mar 2010
Posts: 431
Likes: 13
From: Sherman Oaks CA
Thread Starter
Pro
Joined: Apr 2011
Posts: 696
Likes: 7
From: Sacramento Ca
I think I've got it sorted out. The new style knock sensors should thread in the sides of the block using the racetronix extenders. I purchased an LS3 front cover with sensor that will work with the extender as well. My batwing and pickup will work. Only things I'm iffy on is my melling pump, nice true double roller set, Rear and valley covers...
Safety Car
Joined: Jul 2004
Posts: 3,904
Likes: 29
From: Vancouver Washington
I think I've got it sorted out. The new style knock sensors should thread in the sides of the block using the racetronix extenders. I purchased an LS3 front cover with sensor that will work with the extender as well. My batwing and pickup will work. Only things I'm iffy on is my melling pump, nice true double roller set, Rear and valley covers...
Last edited by Last C5; Feb 25, 2015 at 06:00 PM.
Le Mans Master
Joined: Jan 2009
Posts: 6,226
Likes: 33
From: Morton illinois
St. Jude Donor '14-'15
I think I've got it sorted out. The new style knock sensors should thread in the sides of the block using the racetronix extenders. I purchased an LS3 front cover with sensor that will work with the extender as well. My batwing and pickup will work. Only things I'm iffy on is my melling pump, nice true double roller set, Rear and valley covers...
You won't need extenders. Just tap the holes in the block. It's barely anything.
Supporting Vendor
Joined: Apr 2011
Posts: 3,332
Likes: 195
From: Frederick Maryland
St. Jude Donor '08-'09-'10-'11-'12, '14-'15-'16-'17-'18
You will need to:
Drill and tap sides of the block for relocating the knock sensors.
MUST use 1X cam gear set up
Must notch the passenger side engine mount to clear the 3rd bolt boss for AC.
Knock/cam wiring harness/map harness (when using FAST 102)/throttle body harness (you need to use LS2/NW 102) since the intake manifold has 4 bolt set up for TB. Casper has everything you need.
We have done this swap many times.
Drill and tap sides of the block for relocating the knock sensors.
MUST use 1X cam gear set up
Must notch the passenger side engine mount to clear the 3rd bolt boss for AC.
Knock/cam wiring harness/map harness (when using FAST 102)/throttle body harness (you need to use LS2/NW 102) since the intake manifold has 4 bolt set up for TB. Casper has everything you need.
We have done this swap many times.
__________________
Last edited by Rick@RKT Performance; Feb 28, 2015 at 12:45 AM.
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Thread Starter
Pro
Joined: Apr 2011
Posts: 696
Likes: 7
From: Sacramento Ca
Thanks for chiming in, guys. So I can't run my current timing set? Even tho I'm still using my C5 PCM? I've already gotten the LS3 cover with sensor... also a double roller doesn't fit with the LS3 cover?
Supporting Vendor
Joined: Apr 2011
Posts: 3,332
Likes: 195
From: Frederick Maryland
St. Jude Donor '08-'09-'10-'11-'12, '14-'15-'16-'17-'18
Make sure your timing chain is for 1X (not 4X) and you can use it. You will need to clearance the front cover if you use double roller timing chain. The kit should come with spacers for the oil pump.