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Re: 6.4 rotating assembly into 5.7 builds
[Re: mshred]
#3222100
03/22/24 12:02 PM
03/22/24 12:02 PM
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Joined: Jan 2005
Posts: 12,419 Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,419
Kalispell Mt.
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Ive contemplated the possibilities and decided it is just best to buy a good used 6.4 block and used pistons before boring a 5.7 block unless you had a brand new block that didn't need bored but you would still need custom pistons that cost as much as a good used 6.4 block. The 6.4 blocks have gotten a lot cheaper lately.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: 6.4 rotating assembly into 5.7 builds
[Re: HotRodDave]
#3222644
03/25/24 09:30 AM
03/25/24 09:30 AM
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Joined: Apr 2009
Posts: 3,415 Toronto
mshred
OP
master
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OP
master
Joined: Apr 2009
Posts: 3,415
Toronto
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Ive contemplated the possibilities and decided it is just best to buy a good used 6.4 block and used pistons before boring a 5.7 block unless you had a brand new block that didn't need bored but you would still need custom pistons that cost as much as a good used 6.4 block. The 6.4 blocks have gotten a lot cheaper lately. Thanks for the input Dave. Everything G3 hemi around here is still crazy expensive, guys still want 2k for early 5.7 cores although some pop up for $500-$800 from time to time. Anything 6.1 or 6.4 is crazy money still, but someone local was selling a 6.4 rotating assembly and I thought maybe the crank and rods could work with a custom or off the shelf piston. Just wasn't sure who was doing it. I figured the 6.4 pistons would be a no go just on the bore size alone.
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Re: 6.4 rotating assembly into 5.7 builds
[Re: mshred]
#3222651
03/25/24 10:32 AM
03/25/24 10:32 AM
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Joined: Jul 2006
Posts: 164 Pahrump NV.
Doright
member
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member
Joined: Jul 2006
Posts: 164
Pahrump NV.
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I put 6.1 pistons in a 5.7 with Eagle heads and big cam makes great power @ 10.5 to 1 with a mild tune.
D Barnett A&P mechanic, FCC general radio Telephone operator.
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Re: 6.4 rotating assembly into 5.7 builds
[Re: Doright]
#3223155
03/27/24 02:48 PM
03/27/24 02:48 PM
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Joined: Apr 2009
Posts: 3,415 Toronto
mshred
OP
master
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OP
master
Joined: Apr 2009
Posts: 3,415
Toronto
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I put 6.1 pistons in a 5.7 with Eagle heads and big cam makes great power @ 10.5 to 1 with a mild tune. Can you share any more details on it? Stock 6.1 pistons and 5.7 crank? What are the cam specs and power numbers?
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Re: 6.4 rotating assembly into 5.7 builds
[Re: mshred]
#3227125
04/15/24 12:08 AM
04/15/24 12:08 AM
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Joined: Feb 2022
Posts: 1,225 Nor here, Nor there
Dart 500
pro stock
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pro stock
Joined: Feb 2022
Posts: 1,225
Nor here, Nor there
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Ive contemplated the possibilities and decided it is just best to buy a good used 6.4 block and used pistons before boring a 5.7 block unless you had a brand new block that didn't need bored but you would still need custom pistons that cost as much as a good used 6.4 block. The 6.4 blocks have gotten a lot cheaper lately. Thanks for the input Dave. Everything G3 hemi around here is still crazy expensive, guys still want 2k for early 5.7 cores although some pop up for $500-$800 from time to time. Anything 6.1 or 6.4 is crazy money still, but someone local was selling a 6.4 rotating assembly and I thought maybe the crank and rods could work with a custom or off the shelf piston. Just wasn't sure who was doing it. I figured the 6.4 pistons would be a no go just on the bore size alone. I would buy the rotating assembly and then keep your eyes out for a block and everything else needed, even if it requires a trip over the border. Piece it together over time
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Re: 6.4 rotating assembly into 5.7 builds
[Re: mshred]
#3227877
04/18/24 12:00 PM
04/18/24 12:00 PM
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Joined: Jan 2005
Posts: 12,419 Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,419
Kalispell Mt.
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I just had a thought this morning, I'll try mocking it up today and let you know if it looks like it will work.
03 to 08 5.7 blocks are slightly taller and the later eagle pistons are slightly shorter, I am gonna try a 6.4 crank in an early 5.7 block with the later pistons and see how far out the deck they are and if not too much then maybe double up the head gaskets as long as the top ring don't go out of the chamfer in the cylinder and skirts don't collide with counterweights...
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: 6.4 rotating assembly into 5.7 builds
[Re: HotRodDave]
#3227878
04/18/24 12:03 PM
04/18/24 12:03 PM
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Joined: Jan 2005
Posts: 12,419 Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,419
Kalispell Mt.
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should be a 359 or 5.9 litre plus a decent compresison bump but it won't allow for a big cam as there is no valve relief...
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: 6.4 rotating assembly into 5.7 builds
[Re: HotRodDave]
#3228886
04/24/24 08:50 AM
04/24/24 08:50 AM
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Joined: Feb 2006
Posts: 1,051 The Great White North
RAMM
super stock
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super stock
Joined: Feb 2006
Posts: 1,051
The Great White North
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I did this with Icon pistons and a 6.125" rod length. The pin bosses did interfere with the counterweights. J.Rob
2009 PHR\EMC Competitor 2010 PHR\EMC Competitor 2011 PHR\EMC Competitor 2012 PHR\EMC Competitor 2013 PHR\EMC Competitor 2014 HotRod/EMC Competitor 2015 HotRod/EMC NoShow 2016 HotRod/EMC 3rd place SPEC Bigblock 2018 HotRod/EMC 7th place G3
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Re: 6.4 rotating assembly into 5.7 builds
[Re: mshred]
#3228887
04/24/24 08:53 AM
04/24/24 08:53 AM
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Joined: Feb 2006
Posts: 1,051 The Great White North
RAMM
super stock
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super stock
Joined: Feb 2006
Posts: 1,051
The Great White North
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Ive contemplated the possibilities and decided it is just best to buy a good used 6.4 block and used pistons before boring a 5.7 block unless you had a brand new block that didn't need bored but you would still need custom pistons that cost as much as a good used 6.4 block. The 6.4 blocks have gotten a lot cheaper lately. Thanks for the input Dave. Everything G3 hemi around here is still crazy expensive, guys still want 2k for early 5.7 cores although some pop up for $500-$800 from time to time. Anything 6.1 or 6.4 is crazy money still, but someone local was selling a 6.4 rotating assembly and I thought maybe the crank and rods could work with a custom or off the shelf piston. Just wasn't sure who was doing it. I figured the 6.4 pistons would be a no go just on the bore size alone. I have a 6.4 longblock for sale Mshred. The heads are ported Eagles and they were ported by member SixPackGut. J.Rob
2009 PHR\EMC Competitor 2010 PHR\EMC Competitor 2011 PHR\EMC Competitor 2012 PHR\EMC Competitor 2013 PHR\EMC Competitor 2014 HotRod/EMC Competitor 2015 HotRod/EMC NoShow 2016 HotRod/EMC 3rd place SPEC Bigblock 2018 HotRod/EMC 7th place G3
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Re: 6.4 rotating assembly into 5.7 builds
[Re: mshred]
#3228888
04/24/24 08:59 AM
04/24/24 08:59 AM
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Joined: Feb 2006
Posts: 1,051 The Great White North
RAMM
super stock
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super stock
Joined: Feb 2006
Posts: 1,051
The Great White North
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Ive contemplated the possibilities and decided it is just best to buy a good used 6.4 block and used pistons before boring a 5.7 block unless you had a brand new block that didn't need bored but you would still need custom pistons that cost as much as a good used 6.4 block. The 6.4 blocks have gotten a lot cheaper lately. Thanks for the input Dave. Everything G3 hemi around here is still crazy expensive, guys still want 2k for early 5.7 cores although some pop up for $500-$800 from time to time. Anything 6.1 or 6.4 is crazy money still, but someone local was selling a 6.4 rotating assembly and I thought maybe the crank and rods could work with a custom or off the shelf piston. Just wasn't sure who was doing it. I figured the 6.4 pistons would be a no go just on the bore size alone.
2009 PHR\EMC Competitor 2010 PHR\EMC Competitor 2011 PHR\EMC Competitor 2012 PHR\EMC Competitor 2013 PHR\EMC Competitor 2014 HotRod/EMC Competitor 2015 HotRod/EMC NoShow 2016 HotRod/EMC 3rd place SPEC Bigblock 2018 HotRod/EMC 7th place G3
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