6.4 SRT cam into 5.7 eagle information
#2357916
08/22/17 12:32 AM
08/22/17 12:32 AM
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Joined: Jan 2005
Posts: 12,419 Kalispell Mt.
HotRodDave
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So I have changed plans several times on my truck motor and am currently building a new one for it just because I want some more power.
I am mentioning this here because there is a ton of bad and weird and just plain wrong info out there for this swap so figured I would clear the air on how it is going on mine.
For a little preface, I milled this block .020 to bump compression and quench, I figure it bumped compresion about 1/2 point.
Today I assembled the 5.7 short block with the 6.4 MDS cam and a dissasembled cam phaser and tested valve clearance both in full advance and full retard as well as 1/2 way between, on both intake and exhaust and found over .050 PTV clearance at all times, (I collapsed a lifter, shimmed the valves just barely closed then added .050 more shim and bolted the rocker shaft back down, rotated through many revolutions with no sighn of touching) may have been more but I stopped with that because that is all I care about, I am not spending $1000 on a cam and cam phaser limiter. So on a stock block there should be even more so I see no reason this could not be done in the truck, in a day and without removing the heads. The 5.7 spring might even work(I would at least buy new ones, they are under $60 from the dealer) or better yet just buy the 6.4 springs, they have a tiny bit higher spring pressure.
This might not be an awesome cam but I don't see how it can not be good especially when considering the cam cost me $68 and I needed a new cam anyhow. A lot of guys are saying you have to install the comp cams phazer limiter, that is grade A bologna.
Hopefully someday soon I will have an update how this thing runs. Probably gonna at least tough up the ports and VJ since I got the heads off anyhow. Hope this helps clear the air about this swap.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: 6.4 SRT cam into 5.7 eagle information
[Re: HotRodDave]
#2357997
08/22/17 07:09 AM
08/22/17 07:09 AM
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Joined: Jan 2006
Posts: 1,400 Trumbauersville PA
ric3xrt
pro stock
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pro stock
Joined: Jan 2006
Posts: 1,400
Trumbauersville PA
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I had the 6.4 SRT(MDS) cam in my 2014's stock 5.7 , no issues, stock springs , no tune just plug and played. Ran about the same off idle to 3k, from about 3k on Pulled like a banshee till 6k , never did get it tuned....should of but didn't. If you plan on going past 6k I would opt for the 6.4 springs. Just my $02 worth.
Last edited by ric3xrt; 08/22/17 07:11 AM.
Truth has no agenda, but those with an agenda make their own truth. Some of us are so open minded they only see their View
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Re: 6.4 SRT cam into 5.7 eagle information
[Re: WO23Coronet]
#2358456
08/23/17 07:45 AM
08/23/17 07:45 AM
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Joined: Jan 2006
Posts: 1,400 Trumbauersville PA
ric3xrt
pro stock
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Joined: Jan 2006
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Worked fine, only thing I didn't like was with the 3.55 gears it seamed to lose some stoplight bottom grunt, with 3.92s-4.56s it would been great.
Truth has no agenda, but those with an agenda make their own truth. Some of us are so open minded they only see their View
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Re: 6.4 SRT cam into 5.7 eagle information
[Re: HotRodDave]
#2358730
08/23/17 07:53 PM
08/23/17 07:53 PM
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Joined: Jan 2005
Posts: 12,419 Kalispell Mt.
HotRodDave
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I Live Here
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OP
I Live Here
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Kalispell Mt.
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Don't tell me that, I was hoping to have my cake and eat it too.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: 6.4 SRT cam into 5.7 eagle information
[Re: Medlock51]
#2359001
08/24/17 09:05 AM
08/24/17 09:05 AM
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Joined: Jan 2006
Posts: 1,400 Trumbauersville PA
ric3xrt
pro stock
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Joined: Jan 2006
Posts: 1,400
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Does anyone know if the later VVT blocks (6.1/6.2/6.4) can be machined to accept an '03-'08 cam without the cam phaser deal?
I'm initially going to build an early 5.7 w/carb (rules) for my dirt car but would like to see if there's a way I can finagle some extra cubes without going to a longer stroke than a 3.79... the hot set-up in these endurance deals seems to be a big bore/short stroke motor. Sonic test your 5.7 block, there are a few of them out there(03-04) that can go as large as the 4.055 Bore of the 6.1 hemi.
Truth has no agenda, but those with an agenda make their own truth. Some of us are so open minded they only see their View
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Re: 6.4 SRT cam into 5.7 eagle information
[Re: RTSrunner]
#2359002
08/24/17 09:07 AM
08/24/17 09:07 AM
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Joined: Jan 2006
Posts: 1,400 Trumbauersville PA
ric3xrt
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Joined: Jan 2006
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Trumbauersville PA
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Like the 6.1 cam into a 5.7,probably needs to be installed a bit advanced. Thought about it, but didn't know what kind of clearance I had , I've rear a few places where the MDS cam in the 5.7 can be a bit tight in the stock position.
Truth has no agenda, but those with an agenda make their own truth. Some of us are so open minded they only see their View
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Re: 6.4 SRT cam into 5.7 eagle information
[Re: MattW]
#2359012
08/24/17 09:42 AM
08/24/17 09:42 AM
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Joined: Jun 2005
Posts: 2,776 Ontario Canada
MattW
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master
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Posts: 2,776
Ontario Canada
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2the cam is longer
Last edited by MattW; 08/24/17 09:42 AM.
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Re: 6.4 SRT cam into 5.7 eagle information
[Re: HotRodDave]
#2359016
08/24/17 09:49 AM
08/24/17 09:49 AM
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Joined: Jan 2006
Posts: 1,400 Trumbauersville PA
ric3xrt
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I believe it can be done, just need some one to go 1st, I don't have a spare 09 up 5.7 block to sacrifice. or I would of milled it down to see.
MatW have you done anything with the LS ECU/PCM? Pm if you want.
Truth has no agenda, but those with an agenda make their own truth. Some of us are so open minded they only see their View
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Re: 6.4 SRT cam into 5.7 eagle information
[Re: HotRodDave]
#2359021
08/24/17 10:09 AM
08/24/17 10:09 AM
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Joined: Jan 2006
Posts: 1,400 Trumbauersville PA
ric3xrt
pro stock
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pro stock
Joined: Jan 2006
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Trumbauersville PA
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One of the guys who works for me, he and I built a 446 in 392 for his old mans 2014 Challenger , we used the Hemitronix kit because the old man wanted to run a Hughs cam, I tried to talk him in to milling the SRT392 block but he didn't want to be my test subject.
Truth has no agenda, but those with an agenda make their own truth. Some of us are so open minded they only see their View
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Re: 6.4 SRT cam into 5.7 eagle information
[Re: HotRodDave]
#2360178
08/26/17 03:39 PM
08/26/17 03:39 PM
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Joined: Jan 2006
Posts: 1,400 Trumbauersville PA
ric3xrt
pro stock
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pro stock
Joined: Jan 2006
Posts: 1,400
Trumbauersville PA
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Used VVT stuff is starting to get into the used market, but there's still way more non vvt stuff, + after market timing sets.
Truth has no agenda, but those with an agenda make their own truth. Some of us are so open minded they only see their View
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Re: 6.4 SRT cam into 5.7 eagle information
[Re: HotRodDave]
#2360272
08/26/17 07:29 PM
08/26/17 07:29 PM
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Joined: Jun 2016
Posts: 170 Wisconsin
Medlock51
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I'll have a chat with Mike Jones @ Jones Cams... not sure if he has done much with the Gen III stuff... I'll have to have a custom cam ground with specs that will favor my application...
The photos from MattW seem to show that it can be done. I do have a broken block to play with and a couple good machine shops within shouting distance.
Last edited by Medlock51; 08/28/17 11:35 PM.
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Re: 6.4 SRT cam into 5.7 eagle information
[Re: HotRodDave]
#2418012
12/13/17 04:30 PM
12/13/17 04:30 PM
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Joined: Jan 2005
Posts: 12,419 Kalispell Mt.
HotRodDave
OP
I Live Here
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OP
I Live Here
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Kalispell Mt.
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So I just got the first cam swap done, experimented on a 09 3/4 ton 4x4 service truck I am selling that had a bad cam and it is running awesome, the roads are wet today and even from a 35 mph roll mashing it, it is spinning all 4 and getting sideways in a very heavy truck with 285-70-17 tires. The idle is barely noticable. Got to wonder why the factory didn't do it. I used a new set of 5.7 springs, the local machine shop tested a couple and said they were within a couple pounds of the 6.4 spring and they were way cheaper. Every single part is from a 5.7 except the actual cam it'self so that $68 cam should be all you need to buy besides gaskets, I would recomend new springs just to be safe.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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