Re: Magnum Engine in 68 A body
[Re: 440PURSUIT]
#999739
05/25/11 05:08 PM
05/25/11 05:08 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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I think the balance is diff so flex plate/tc and you need a LA timing cover and the Hughes' front cam adapter to run a mech fuel pump (it's dirt cheap). Prob more but this'll get you started
live every 24 hour block of time like it's your last day on earth
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Re: Magnum Engine in 68 A body
[Re: 440PURSUIT]
#999740
05/25/11 05:09 PM
05/25/11 05:09 PM
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Joined: Jun 2008
Posts: 10,847 Oakdale CT
gdonovan
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I Live Here
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Oakdale CT
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Quote:
What mounts/exhaust/major concern to replace an LA 318? I know that the Carbureted intake can be expensive.
Tech article available?
THanks
Same rules apply for 5.2/5.9 mounts as 318/360
a 5.2 will slip in the same spot as a 318 with no to little issues, I have a 5.9 in my Duster.
Intakes can be tricky but there is lots of options out there.
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Re: Magnum Engine in 68 A body
[Re: gdonovan]
#999741
05/25/11 09:14 PM
05/25/11 09:14 PM
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Joined: Jul 2003
Posts: 6,167 Maryland
GO_Fish
master
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master
Joined: Jul 2003
Posts: 6,167
Maryland
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if you are handy, and have access to both Magnum and LA heads, its not that hard to make your own jig and cross drill the magnum heads to accept any LA intake.
Scott B.
"I'm a self-made man... I started with nothing, and I still have most of it!"
68 360 rusty B'cuda 'vert (GO Fish)13.59@ 98.72 mph
69 340 GTS stock 14.18@ 95.60 mph
01 5.9L Ram 1500 Quad Cab 4x4
01 3.5L 300M 16.23@ 86.97 mph
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Re: Magnum Engine in 68 A body
[Re: RapidRobert]
#999742
05/25/11 09:19 PM
05/25/11 09:19 PM
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Joined: Jun 2008
Posts: 10,847 Oakdale CT
gdonovan
I Live Here
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I Live Here
Joined: Jun 2008
Posts: 10,847
Oakdale CT
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Quote:
I think the balance is diff so flex plate/tc and you need a LA timing cover and the Hughes' front cam adapter to run a mech fuel pump (it's dirt cheap). Prob more but this'll get you started
5.2 and 318 the same as far as balance, 360 and 5.9 are different.
See this thread for 360/5.9 info-
https://board.moparts.org/ubbthreads/show...t=1#Post6068818
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Re: Magnum Engine in 68 A body
[Re: gdonovan]
#999743
05/25/11 09:28 PM
05/25/11 09:28 PM
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Joined: Oct 2003
Posts: 21,345 Marysville, O-H-I-O
70Cuda383
Too Many Posts
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Too Many Posts
Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
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yup, 5.2L magnums are internal/zero balance. the 5.9s are external, and a different balance factor than the LA360s.
there's a cheaper carb intake out there, it's not a name brand, but it's a copy of an Eddy RPM airgap, 4bbl carb intake (no bosses drilled for injectors) and comes with a dual bolt pattern for both LA and Magnum style heads. not well marketed, being non-name brand, but I saw a few on Ebay.
**Photobucket sucks**
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Re: Magnum Engine in 68 A body
[Re: Jim_Lusk]
#999747
05/26/11 02:23 AM
05/26/11 02:23 AM
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Joined: Feb 2003
Posts: 1,665 Milwaukee, WI
Prince_Valiant
top fuel
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top fuel
Joined: Feb 2003
Posts: 1,665
Milwaukee, WI
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Quote:
In my opinion, there's not enough to gain unless you keep the fuel injection and computer management. Otherwise, simple hop-up stuff to the 318 you already have will suffice.
Better heads and roller cam...will perform as well or better than a simple hopped-up LA engine while the magnum is mostly stock.
I ran a stock 360 magnum (aside from intake), with stock 1979 manifolds and ran 15.1 @ 91 mph in the little red truck. Using a hughes roller cam (mild one at that) and headers and it felt like a completely different truck...low 14's probable. A similarly hopped up LA probably would have been only a little quicker than the stock-ish magnum was...
1979 Dodge Lil' Red Express - 360 rwhp, 13.2 @ 103mph 1968 Coronet: 318, 2.76, 15.2 @ 92mph! (SOLD) 1976 Valiant: 360, 3.90, 12.90 @ 106 (SOLD) 1989 Shelby CSX #500/500
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Re: Magnum Engine in 68 A body
[Re: Prince_Valiant]
#999748
05/26/11 03:07 AM
05/26/11 03:07 AM
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Joined: Mar 2003
Posts: 18,678 Fresno, CA
Jim_Lusk
I Live Here
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I Live Here
Joined: Mar 2003
Posts: 18,678
Fresno, CA
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Quote:
Quote:
In my opinion, there's not enough to gain unless you keep the fuel injection and computer management. Otherwise, simple hop-up stuff to the 318 you already have will suffice.
Better heads and roller cam...will perform as well or better than a simple hopped-up LA engine while the magnum is mostly stock.
I ran a stock 360 magnum (aside from intake), with stock 1979 manifolds and ran 15.1 @ 91 mph in the little red truck. Using a hughes roller cam (mild one at that) and headers and it felt like a completely different truck...low 14's probable. A similarly hopped up LA probably would have been only a little quicker than the stock-ish magnum was...
I don't think 15.1 is that much better than stock for an LRT, but I could be mistaken. I'd throw an LA 360 in place of a 318 before I'd go for the same cubes in a swap. I've done a 318 Magnum swap, but it was all the way with the injection and overdrive auto AND it didn't cost me anything. I'd do that again if given the chance, but not without the injection.
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Re: Magnum Engine in 68 A body
[Re: Jim_Lusk]
#999750
05/26/11 08:50 AM
05/26/11 08:50 AM
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Joined: Jan 2003
Posts: 24,562 Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
In my opinion, there's not enough to gain unless you keep the fuel injection and computer management. Otherwise, simple hop-up stuff to the 318 you already have will suffice.
nah the roller set-up and much better heads make it a no-brainer. Even w/ a small 4bbl it should run much better than a stockish 69 318.
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Re: Magnum Engine in 68 A body
[Re: Jim_Lusk]
#999753
05/26/11 10:35 AM
05/26/11 10:35 AM
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Joined: Feb 2003
Posts: 1,665 Milwaukee, WI
Prince_Valiant
top fuel
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top fuel
Joined: Feb 2003
Posts: 1,665
Milwaukee, WI
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Quote:
Quote:
Quote:
In my opinion, there's not enough to gain unless you keep the fuel injection and computer management. Otherwise, simple hop-up stuff to the 318 you already have will suffice.
Better heads and roller cam...will perform as well or better than a simple hopped-up LA engine while the magnum is mostly stock.
I ran a stock 360 magnum (aside from intake), with stock 1979 manifolds and ran 15.1 @ 91 mph in the little red truck. Using a hughes roller cam (mild one at that) and headers and it felt like a completely different truck...low 14's probable. A similarly hopped up LA probably would have been only a little quicker than the stock-ish magnum was...
I don't think 15.1 is that much better than stock for an LRT, but I could be mistaken. I'd throw an LA 360 in place of a 318 before I'd go for the same cubes in a swap. I've done a 318 Magnum swap, but it was all the way with the injection and overdrive auto AND it didn't cost me anything. I'd do that again if given the chance, but not without the injection.
Well, the "stock" engine in an LRT though isn't quite what we consider "stock bread n' butter" LA engine per se.
Don't forget that the stock 360's used a hotter cam of which approximated a "340 cam" (~212-218 @ .050) to get to the 225 net HP. While the cam in the magnum was indeed the stock roller cam that is sub 190 @ .050 in size....the cam I upgraded to was not even as large at .050 than the stock cam typically found in the e58 engine in lrt's...
But for the record, most of the stock lrt's I've seen for 79's were typically in the mid 15's....but in effect, the stock e58 represents you're typical mildly hopped up 360 w/o headers...I think an e58 w/ headers would have been a close match, but mine w/ the same headers and equivalent sized cam at .050, it'd be no contest.
1979 Dodge Lil' Red Express - 360 rwhp, 13.2 @ 103mph 1968 Coronet: 318, 2.76, 15.2 @ 92mph! (SOLD) 1976 Valiant: 360, 3.90, 12.90 @ 106 (SOLD) 1989 Shelby CSX #500/500
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Re: Magnum Engine in 68 A body
[Re: Prince_Valiant]
#999754
05/26/11 12:14 PM
05/26/11 12:14 PM
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Joined: Oct 2003
Posts: 21,345 Marysville, O-H-I-O
70Cuda383
Too Many Posts
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Too Many Posts
Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
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magnum 5.9L, stock cam, heads, pistons, carb intake, headers, and they make what...300 hp? that's the combo for the 300hp crate motors, right?
bump the compression with either flat top pistons or shave the heads, add a cam, and you have the recipie for the 385hp crate motors.
so...a 385hp small block for the cost of a junkyard 5.9L magnum out of a wrecked 01 Durango, and a cam swap. I built mine for $1000. $500 for the motor and head shave job, and the roller cam, springs, retainers.
**Photobucket sucks**
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Re: Magnum Engine in 68 A body
[Re: Prince_Valiant]
#999755
05/26/11 06:05 PM
05/26/11 06:05 PM
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Joined: Aug 2007
Posts: 1,819 Middle of A Field
OrangeProwler
top fuel
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top fuel
Joined: Aug 2007
Posts: 1,819
Middle of A Field
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Quote:
Quote:
Quote:
Quote:
In my opinion, there's not enough to gain unless you keep the fuel injection and computer management. Otherwise, simple hop-up stuff to the 318 you already have will suffice.
Better heads and roller cam...will perform as well or better than a simple hopped-up LA engine while the magnum is mostly stock.
I ran a stock 360 magnum (aside from intake), with stock 1979 manifolds and ran 15.1 @ 91 mph in the little red truck. Using a hughes roller cam (mild one at that) and headers and it felt like a completely different truck...low 14's probable. A similarly hopped up LA probably would have been only a little quicker than the stock-ish magnum was...
I don't think 15.1 is that much better than stock for an LRT, but I could be mistaken. I'd throw an LA 360 in place of a 318 before I'd go for the same cubes in a swap. I've done a 318 Magnum swap, but it was all the way with the injection and overdrive auto AND it didn't cost me anything. I'd do that again if given the chance, but not without the injection.
Well, the "stock" engine in an LRT though isn't quite what we consider "stock bread n' butter" LA engine per se.
Don't forget that the stock 360's used a hotter cam of which approximated a "340 cam" (~212-218 @ .050) to get to the 225 net HP. While the cam in the magnum was indeed the stock roller cam that is sub 190 @ .050 in size....the cam I upgraded to was not even as large at .050 than the stock cam typically found in the e58 engine in lrt's...
But for the record, most of the stock lrt's I've seen for 79's were typically in the mid 15's....but in effect, the stock e58 represents you're typical mildly hopped up 360 w/o headers...I think an e58 w/ headers would have been a close match, but mine w/ the same headers and equivalent sized cam at .050, it'd be no contest.
A stock LRT will run 15.8 to 15.9 in the 1/4 mile. Sometimes a little slower. I've seen a couple in the 16.0 range.
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Questions? Help!
[Re: 440PURSUIT]
#999756
05/27/11 07:18 PM
05/27/11 07:18 PM
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Joined: Dec 2004
Posts: 1,554 DC, MD Suburbs
440PURSUIT
OP
pro stock
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OP
pro stock
Joined: Dec 2004
Posts: 1,554
DC, MD Suburbs
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OK. Bought a fresh rebuilt 5.2 Magnum Longblock from a 95 Truck. Got it for $400. Its going in a 68 B'Cuda Notch.
Is this engine Internal or external balance? What Torque Converter to use?
I plan to Carburate. I saw the $165 Intake on Ebay.
Should I change cam? Its has the fuel injection cam so may have short duration on intake?
Thoughts?
Thanks
Last edited by 440PURSUIT; 05/27/11 07:19 PM.
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Re: Questions? Help!
[Re: 440PURSUIT]
#999757
05/31/11 01:20 PM
05/31/11 01:20 PM
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Joined: Jan 2003
Posts: 16,123 Grand Haven, MI
patrick
I Live Here
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I Live Here
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Posts: 16,123
Grand Haven, MI
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5.2 is internally balanced.
the $165 intake is a professional products crosswind. OK mani, I'd go for a eddie magnum air gap.
get the stock roller cam reground by bullet cams using their HR259/316 lobe for intake and exhaust, and use hughes #1110 springs with their retainers. you should be able to maintain the stock pushrods and rockers (at least I was able to)
1976 Spinnaker White Plymouth Duster, /6 A833OD 1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!*** 2011 Toxic Orange Dodge Charger R/T 2017 Grand Cherokee Overland 2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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