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Re: mopar cam 557? [Re: S/ST 3040] #561105
12/24/09 11:52 AM 12/24/09 11:52 AM
Joined: Jan 2003
Posts: 16,928
NC
440Jim Offline
I Live Here
440Jim  Offline
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Joined: Jan 2003
Posts: 16,928
NC
Quote:

So, a 296º-.557" is really 288º @ .020"/256º @ .050"


That sounds pretty good. The 557 in my street 440 I measured 288º @ .020", 257º @ .050", 165º @ .200 "
Re: mopar cam 557? [Re: onebadstepside] #561106
12/24/09 12:06 PM 12/24/09 12:06 PM
Joined: Feb 2007
Posts: 5,080
organ
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maximum entropy Offline
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organ
Quote:

Whats the scoop on the mopar cam 296...557?What are ya shifting at?Combos and ET's are welcome...I know there are better cams out there,just wondering if its still a decent choice for a low buck 360

i ran that cam for years. it acts smaller than it looks on paper. the wide (110) lsa really tames the idle and makes it a little to soft down low for my taste, but the sky was the limit as far as revs. mine was installed at 108, iirc, and liked to be shifted at 6500. i put a 509 cam in it, and it went faster, fwiw.

for what is the good life if not doing things thoughtfully?
Re: mopar cam 557? [Re: 383man] #561107
12/24/09 01:44 PM 12/24/09 01:44 PM
Joined: Aug 2003
Posts: 4,988
new jersey usa
1
11secdart Offline
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new jersey usa
Good cam, I made a little over 450 hp with a 9 1/2 to 1 340 with ported J heads. I went as fast as 11.34 at 117 in a 3150 lb Dart with 8 inch convertor, 904 and 4.56 gears.

68 Dart 410 / 904
92 D150 original owner
21 Ram 1500 Quad Cab, Big Horn , Hemi ,4x4
23 Audi Q5
16 Honda HRV
Re: mopar cam 557? [Re: bill_greenwood] #561108
12/24/09 02:19 PM 12/24/09 02:19 PM
Joined: Aug 2009
Posts: 456
corpus christi tex
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Cheatham Offline
mopar
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corpus christi tex
Quote:

An alternative is the 284/528 with 1.6 rockers. I'm super tickled with mine.

I liked this cam too in my 340, it pulled hard as hell, idled almost smooth and very responsive, i replaced it with the .557 296 mopar cam and i took it right back out it didnt pull as good as the 284.
Re: mopar cam 557? [Re: Cheatham] #561109
12/24/09 02:38 PM 12/24/09 02:38 PM
Joined: Jul 2003
Posts: 577
Grand Rapids, MI
1
11secondC Offline
mopar
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Grand Rapids, MI
The 557 was good for another 2 mph over the 528...

Re: mopar cam 557? [Re: 11secondC] #561110
12/24/09 03:06 PM 12/24/09 03:06 PM
Joined: Jan 2003
Posts: 5,991
Anoka County, MN
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Leigh Offline
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Leigh  Offline
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Anoka County, MN
In a X headed +.030, 10.5-1 340, the .557 cam won me a ton of rounds, at very little expense. 11.80's @3125 lbs. As stated earlier, off idle, tip in driveability is exceptional.

Re: mopar cam 557? [Re: Cheatham] #561111
12/24/09 03:09 PM 12/24/09 03:09 PM
Joined: Jul 2006
Posts: 4,595
On the south side of Nowhere
S
S/ST 3040 Offline
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On the south side of Nowhere
Quote:

Quote:

An alternative is the 284/528 with 1.6 rockers. I'm super tickled with mine.

I liked this cam too in my 340, it pulled hard as hell, idled almost smooth and very responsive, i replaced it with the .557 296 mopar cam and i took it right back out it didnt pull as good as the 284.



I ran the 284-.528" w/1.6 in my 340 for 5 passes.

11.84:1, iron heads, 4600 stall 9 1/2" Dynamic, 727, 5.38 x 32"

11.65 @ 118.4 MPH (1.73 60 ft. )

I brought it home, tore it down and changed practically everything in it.

MP could have done all us SB guys a favor and stuck with 106º LSA.

Like the scoop?

Re: mopar cam 557? [Re: S/ST 3040] #561112
12/24/09 03:28 PM 12/24/09 03:28 PM
Joined: Jun 2009
Posts: 438
Great Lakes Region
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abodiesonly1 Offline
mopar
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Great Lakes Region
Quote:



MP could have done all us SB guys a favor and stuck with 106º LSA.

Like the scoop?




Which is why, as we discussed, Im going from the .557 to the Comp 20-633-5.

Dur @ .050 260/266
.558/.555 w/ 1.5 Rockers
106 LSA


We'll see how it works.
Re: mopar cam 557? [Re: abodiesonly1] #561113
12/24/09 03:31 PM 12/24/09 03:31 PM
Joined: Jul 2006
Posts: 4,595
On the south side of Nowhere
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S/ST 3040 Offline
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On the south side of Nowhere
Quote:

Dur @ .050 260/266
.558/.555 w/ 1.5 Rockers
106 LSA




Put it in 100º-102º
Re: mopar cam 557? [Re: S/ST 3040] #561114
12/24/09 03:32 PM 12/24/09 03:32 PM
Joined: Jun 2009
Posts: 438
Great Lakes Region
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abodiesonly1 Offline
mopar
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Great Lakes Region
Quote:

Quote:

Dur @ .050 260/266
.558/.555 w/ 1.5 Rockers
106 LSA




Put it in 100º-102º




Re: mopar cam 557? [Re: S/ST 3040] #561115
12/24/09 04:26 PM 12/24/09 04:26 PM
Joined: Sep 2004
Posts: 2,093
oberlin, Ohio
Rapid340 Offline
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Posts: 2,093
oberlin, Ohio
Quote:

Since I believe the DC/MP Solids all come from the same lobe "family"........

First the advertised duration is incorrect (for what we're all used to)

The seat to seat duration is given @ .015" not .020"

To find duartion @ .020", subtract 8º from what MP tells you.

To find duration @ .050", subtract 32º(intensity)from the answer you got from above.

So, a 296º-.557" is really 288º @ .020"/256º @ .050"

312º-.590.........304º @ .020"/272º @ .050" and so on

Keep in mind when comparing duration at .050 on a hydraulic verses a solid, or two solids with different lash specs, that the lash must be taken into account. I have found that 1/2 degree per thousanth of lash is a decent rule of thumb.

Most of the solid cams I use have lash specs of .018 in. so I would subtract 9 degrees off the solid cam duration at .050 to compare to a hydraulic (with no lash). The mopar cams the lobes are designed with a .028 lash so I would subtract about 5 degrees at .050 to compare it to solid cam with a .018 lash.

If you want to know the actual valve seat timing you could set the lash and then measure crank degrees from when the valve/retainer first moves off the seat to when it rests on the seat. Or you could divide the lash by the rocker ratio and measure the duration at the lifter with that lift (rocker ratios do not remain constant throughout the lift range but this would be a good rough approximation).

Could do the same thing for effective lifter duration at .050 by measuring duration of valve lift at (.050 x rocker ratio) after setting lash.


Merry Chistmas

1971 Factory Appearing Duster 340 11.000 @ 122 mph
Re: mopar cam 557? [Re: Rapid340] #561116
12/26/09 04:16 PM 12/26/09 04:16 PM
Joined: Oct 2004
Posts: 5,618
long island NY
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Ari440 Offline
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Posts: 5,618
long island NY
did any one use the 590 cam in a small block ?

1.39 9.85 - 137 mph
Re: mopar cam 557? [Re: Ari440] #561117
12/30/09 08:30 PM 12/30/09 08:30 PM
Joined: Nov 2004
Posts: 951
Alliance, Ohio
V
Valiant_Showoff Offline
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Posts: 951
Alliance, Ohio
I'm running the 557 solid in my street/strip '63 Valiant and love it. Good street manners but still enough lope to let you know it's not a daily driver.

My set up is pretty basic:
junk yard 360
stock bottom end
Eddy heads (OOTB)
Victor 340 intake
750 Holley double pumper
8" ATI convertor and 904 tranny
Doug's 1-5/8" headers
full length 2-1/2" exhaust
8-3/4" with 3.91 gears
27"x8" M/T ET Radials

Shift at 6,200

Best ET of 11.68 was this summer at the Mopar Nats in 80+ heat.

60' times are in the 1.62-1.64 range depending on the weather.
Re: mopar cam 557? [Re: Rapid340] #561118
12/30/09 09:18 PM 12/30/09 09:18 PM
Joined: Dec 2008
Posts: 415
Peru
cbarracuda Offline
mopar
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Posts: 415
Peru
I do, 590 mopar sb 408 w2 11.8 compresion 10.16 best for 11 0 less compresion. The 557 is better.
I have used both.
Re: mopar cam 557? [Re: cbarracuda] #561119
01/02/10 10:25 AM 01/02/10 10:25 AM
Joined: Jan 2004
Posts: 169
orange city,FL
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Demon340GSS Offline
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Posts: 169
orange city,FL
I have this cam in my 68' 340 yellow dart and have yet to race it at the track, But it runs great on the street so far.
My combo is made up of old left over parts from other peoples projects that never got finished and I bought, and I did not want to get rid off the stuff years later, and so I am building this 68 dart 340 just for fun.

I am using this cam with matched springs, etc the original X heads,& 340 block, .030 trw forged 12 1/2 to 1's, 727 with 4200 stall, hooker headers,& full flowmaster 40's exhaust with factory exhaust tips, 8 3/4 rear with 3.91. Holley strip dominator intake and 780 holley vac.sec....
This is a car of mine that will sit parked more than it is driven as I have the blower car and my GSS's to play with too.

I am curious what the dart will do, but plan to race it as soon as we can at orlando speedworld ( my closest track)

I have used the 557 profile in my big block 440 demon 340 car also for awhile before switching to a roller cammed blown race motor and went a best of 11.30 et with the 557 cam and 11:1 comp ratio.
I attatched a pic, hope it comes thru...
Grant Eaton 407-947-9005

Owner of Original collector and restored original mopars from Mr Norms Grand Spaulding Dodge.
Re: mopar cam 557? [Re: Demon340GSS] #561120
01/02/10 10:58 AM 01/02/10 10:58 AM
Joined: Aug 2003
Posts: 4,988
new jersey usa
1
11secdart Offline
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1

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Posts: 4,988
new jersey usa
363 ci 11.2 to 1 comp.56cc W2 Heads,590 M/P cam 550hp 10.40 best 3150 lb Dart
343 ci 9 1/2 to 1 comp. ported J heads 557 M/P cam 450 hp 11.34 best in same car

68 Dart 410 / 904
92 D150 original owner
21 Ram 1500 Quad Cab, Big Horn , Hemi ,4x4
23 Audi Q5
16 Honda HRV
Re: mopar cam 557? [Re: Demon340GSS] #561121
01/02/10 11:10 AM 01/02/10 11:10 AM
Joined: Jan 2004
Posts: 169
orange city,FL
D
Demon340GSS Offline
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Demon340GSS  Offline
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Joined: Jan 2004
Posts: 169
orange city,FL
trying a picture again.

5705389-IMG_0186.JPG (537 downloads)
Owner of Original collector and restored original mopars from Mr Norms Grand Spaulding Dodge.
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