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#2357916 - 08/21/17 10:32 PM 6.4 SRT cam into 5.7 eagle information
HotRodDave Offline
master

Registered: 01/29/05
Posts: 9873
Loc: Kalispell Mt.
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.
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#2357975 - 08/22/17 12:55 AM Re: 6.4 SRT cam into 5.7 eagle information [Re: HotRodDave]
RTSrunner Online   content
pro stock

Registered: 11/03/03
Posts: 1373
Loc: Pittsburgh,PA
Cool.What year/model truck are you building this engine for Dave?

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#2357981 - 08/22/17 01:36 AM Re: 6.4 SRT cam into 5.7 eagle information [Re: HotRodDave]
WO23Coronet Offline
master

Registered: 01/08/08
Posts: 4095
Loc: Canada
From what I've read on LXForums, you can run a stock tune with one, but to get the most out and make it really shine it needs a custom tune. I've read 50 hp once everything is dialed in. Are you going to run headers?

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#2357997 - 08/22/17 05:09 AM Re: 6.4 SRT cam into 5.7 eagle information [Re: HotRodDave]
ric3xrt Offline
super stock

Registered: 01/13/06
Posts: 1167
Loc: Trumbauersville PA
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.


Attachments
2014 White Ram.jpg




Edited by ric3xrt (08/22/17 05:11 AM)
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#2358186 - 08/22/17 03:33 PM Re: 6.4 SRT cam into 5.7 eagle information [Re: ric3xrt]
WO23Coronet Offline
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Registered: 01/08/08
Posts: 4095
Loc: Canada
How did the MDS work?

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#2358456 - 08/23/17 05:45 AM Re: 6.4 SRT cam into 5.7 eagle information [Re: WO23Coronet]
ric3xrt Offline
super stock

Registered: 01/13/06
Posts: 1167
Loc: Trumbauersville PA
Originally Posted By WO23Coronet
How did the MDS work?

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.
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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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#2358730 - 08/23/17 05:53 PM Re: 6.4 SRT cam into 5.7 eagle information [Re: HotRodDave]
HotRodDave Offline
master

Registered: 01/29/05
Posts: 9873
Loc: Kalispell Mt.
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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#2358853 - 08/23/17 10:10 PM Re: 6.4 SRT cam into 5.7 eagle information [Re: HotRodDave]
RTSrunner Online   content
pro stock

Registered: 11/03/03
Posts: 1373
Loc: Pittsburgh,PA
Like the 6.1 cam into a 5.7,probably needs to be installed a bit advanced.

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#2358892 - 08/23/17 10:53 PM Re: 6.4 SRT cam into 5.7 eagle information [Re: HotRodDave]
Medlock51 Offline
member

Registered: 06/15/16
Posts: 144
Loc: Wisconsin
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.

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#2359001 - 08/24/17 07:05 AM Re: 6.4 SRT cam into 5.7 eagle information [Re: Medlock51]
ric3xrt Offline
super stock

Registered: 01/13/06
Posts: 1167
Loc: Trumbauersville PA
Originally Posted By Medlock51
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.
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Truth has no agenda, but those with an agenda make their own truth.
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#2359002 - 08/24/17 07:07 AM Re: 6.4 SRT cam into 5.7 eagle information [Re: RTSrunner]
ric3xrt Offline
super stock

Registered: 01/13/06
Posts: 1167
Loc: Trumbauersville PA
Originally Posted By RTSrunner
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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#2359010 - 08/24/17 07:37 AM Re: 6.4 SRT cam into 5.7 eagle information [Re: Medlock51]
MattW Offline
master

Registered: 06/02/05
Posts: 2646
Loc: Ontario Canada
Originally Posted By Medlock51
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.


Attachments
20170408_160111.jpg

Description: 1



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#2359012 - 08/24/17 07:42 AM Re: 6.4 SRT cam into 5.7 eagle information [Re: MattW]
MattW Offline
master

Registered: 06/02/05
Posts: 2646
Loc: Ontario Canada
2the cam is longer


Attachments
20170408_161840.jpg




Edited by MattW (08/24/17 07:42 AM)

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#2359016 - 08/24/17 07:49 AM Re: 6.4 SRT cam into 5.7 eagle information [Re: HotRodDave]
ric3xrt Offline
super stock

Registered: 01/13/06
Posts: 1167
Loc: Trumbauersville PA
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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#2359021 - 08/24/17 08:09 AM Re: 6.4 SRT cam into 5.7 eagle information [Re: HotRodDave]
ric3xrt Offline
super stock

Registered: 01/13/06
Posts: 1167
Loc: Trumbauersville PA
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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#2359238 - 08/24/17 03:32 PM Re: 6.4 SRT cam into 5.7 eagle information [Re: HotRodDave]
WO23Coronet Offline
master

Registered: 01/08/08
Posts: 4095
Loc: Canada
I know you can get an adapter that fits on the front journal of a conventional 03-08 5.7/6.1 cam and then it can be put in a '09 and later block, actually wouldn't be hard to make if you were 1/2 decent with a mill and lathe.

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#2359461 - 08/25/17 12:10 AM Re: 6.4 SRT cam into 5.7 eagle information [Re: HotRodDave]
L4staero Offline
member

Registered: 09/10/11
Posts: 86
Loc: Australia
If you are buying the kit to put an early cam in a vvt block your at the same price asa vvt cam anyway.
Easy to lock out the phaser and i have seen lots of good priced new and used vvt cams floating around. Hell last week I picked up a lightly used Comp 274 with limiter and non mds lifters for $400 and an inertia mororsports eagle cam and lifters for $300 so plenty of vvt parts seem to be floating around

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#2360178 - 08/26/17 01:39 PM Re: 6.4 SRT cam into 5.7 eagle information [Re: HotRodDave]
ric3xrt Offline
super stock

Registered: 01/13/06
Posts: 1167
Loc: Trumbauersville PA
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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#2360272 - 08/26/17 05:29 PM Re: 6.4 SRT cam into 5.7 eagle information [Re: HotRodDave]
Medlock51 Offline
member

Registered: 06/15/16
Posts: 144
Loc: Wisconsin
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.


Edited by Medlock51 (08/28/17 09:35 PM)

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#2418012 - 12/13/17 01:30 PM Re: 6.4 SRT cam into 5.7 eagle information [Re: HotRodDave]
HotRodDave Offline
master

Registered: 01/29/05
Posts: 9873
Loc: Kalispell Mt.
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.
_________________________
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