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Fresh Magnum 318 is a DOG!---UPDATE
#1144975
12/27/11 01:09 PM
12/27/11 01:09 PM
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Joined: Apr 2007
Posts: 2,327
Glendale, AZ
69L78Nova
OP
Banned. Forever.
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OP
Banned. Forever.
Joined: Apr 2007
Posts: 2,327
Glendale, AZ
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Got the new 318 fired up and running and something seems wrong. It has absolutely no power, sucks gas like a pig, idles kinda rough, and is hard as hell to start when cold. It's a stock piston Magnum 318 with a Summit K6900 cam. It also drags the starter at anything more than 2-3 degrees initial timing. It just feels lazy, and pretty much need to crack the secondaries to take off with traffic. It's as gutless as a 318-2 barrel. It's pulling 16-17 in/hg at 900 rpm. I'm wondering if the chain being off a tooth could be the culprit. I've tried 3 known good carbs and no matter what, it runs like crap. It currently has a box stock 625 Carter on it. I'm going to do a compression test tonight. I'm just hoping the cam isn't too big with the 1.6 rockers. I've run an XE256 in a stock LA318 with great results. The duration @.050" with the Summit cam is small enough, I thought it would be ok. Any thoughts?
1969 Nova
454/M21/3.31
Mild mid-11 second weekend cruiser
1994 F150 XLT Super Cab 2WD
5.0/4R70W/3.55
(Daily driver)
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Re: Fresh Magnum 318 is a DOG!
[Re: MR_P_BODY]
#1144977
12/27/11 01:38 PM
12/27/11 01:38 PM
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Joined: Jan 2003
Posts: 74,976
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,976
U.S.S.A.
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Quote:
Did you degree the cam when you put it in... sounds
like the cam is retarded(put in wrong)
what he said
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Re: Fresh Magnum 318 is a DOG!
[Re: JohnRR]
#1144978
12/27/11 01:50 PM
12/27/11 01:50 PM
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Joined: Apr 2007
Posts: 2,327
Glendale, AZ
69L78Nova
OP
Banned. Forever.
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OP
Banned. Forever.
Joined: Apr 2007
Posts: 2,327
Glendale, AZ
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I didn't degree it, just installed it dot to dot. It's the cam, lifters, pushrods, and timing set out of my old 360. I figured I should add the engine is in my 78 Fury, with headers, 2.5" duals, A500 trans, and 3.55s. So am I correct in assuming the cam isn't too big, and it should be pulling more vacuum than it is?
1969 Nova
454/M21/3.31
Mild mid-11 second weekend cruiser
1994 F150 XLT Super Cab 2WD
5.0/4R70W/3.55
(Daily driver)
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Re: Fresh Magnum 318 is a DOG!
[Re: 69L78Nova]
#1144979
12/27/11 01:58 PM
12/27/11 01:58 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
I didn't degree it, just installed it dot to dot. It's the cam, lifters, pushrods, and timing set out of my old 360. I figured I should add the engine is in my 78 Fury, with headers, 2.5" duals, A500 trans, and 3.55s. So am I correct in assuming the cam isn't too big, and it should be pulling more vacuum than it is?
If its retarded it will change the vac... is it too
big... I dont think so... but you HAVE TO DEGREE it
plus I'd advance it 4* so you get better low end torque
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Re: Fresh Magnum 318 is a DOG!
[Re: MR_P_BODY]
#1144980
12/27/11 02:21 PM
12/27/11 02:21 PM
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Joined: Aug 2003
Posts: 43,124
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,124
Bend,OR USA
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Quote:
Quote:
I didn't degree it, just installed it dot to dot. It's the cam, lifters, pushrods, and timing set out of my old 360. I figured I should add the engine is in my 78 Fury, with headers, 2.5" duals, A500 trans, and 3.55s. So am I correct in assuming the cam isn't too big, and it should be pulling more vacuum than it is?
If its retarded it will change the vac... is it too
big... I dont think so... but you HAVE TO DEGREE it
plus I'd advance it 4* so you get better low end torque
  You may be able to align the dots in 12 motors and the 13th, or 25th one will bite you. Always take the time to degree them from now on 
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Fresh Magnum 318 is a DOG!
[Re: Cab_Burge]
#1144981
12/27/11 02:55 PM
12/27/11 02:55 PM
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Joined: Apr 2007
Posts: 2,327
Glendale, AZ
69L78Nova
OP
Banned. Forever.
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OP
Banned. Forever.
Joined: Apr 2007
Posts: 2,327
Glendale, AZ
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I guess its time to dig the degree wheel out. I do have the offset keyway package as well and adjustable piston stop as well. I have everything to do it. I just never had much confidence when it came to doing that. What better way to learn than to try I guess! I figured it should at least have a decent amount of power for a 318.
1969 Nova
454/M21/3.31
Mild mid-11 second weekend cruiser
1994 F150 XLT Super Cab 2WD
5.0/4R70W/3.55
(Daily driver)
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Re: Fresh Magnum 318 is a DOG!
[Re: 69L78Nova]
#1144982
12/27/11 04:21 PM
12/27/11 04:21 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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You put a flat tapper cam and lifters into a roller cam block? Do you have lifters that allow for oil through pushrods? Otherwise those rockers on the magnum heads won't get oil. How's the pushrod length? I didn't think that was all interchangeable because of the differences in valvetrain.
**Photobucket sucks**
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Re: Fresh Magnum 318 is a DOG!
[Re: 70Cuda383]
#1144983
12/27/11 04:58 PM
12/27/11 04:58 PM
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Joined: Apr 2007
Posts: 2,327
Glendale, AZ
69L78Nova
OP
Banned. Forever.
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OP
Banned. Forever.
Joined: Apr 2007
Posts: 2,327
Glendale, AZ
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Yes, the Summit lifters do have the oil hole in the plunger. The pushrods are the same 7.650" rods I had in my LA360 with Magnum heads. The rockers are getting oil
1969 Nova
454/M21/3.31
Mild mid-11 second weekend cruiser
1994 F150 XLT Super Cab 2WD
5.0/4R70W/3.55
(Daily driver)
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Re: Fresh Magnum 318 is a DOG!
[Re: 69L78Nova]
#1144984
12/27/11 05:40 PM
12/27/11 05:40 PM
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Joined: Jan 2003
Posts: 10,704
North Dakota
6PakBee
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,704
North Dakota
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Quote:
I didn't degree it, just installed it dot to dot. It's the cam, lifters, pushrods, and timing set out of my old 360. I figured I should add the engine is in my 78 Fury, with headers, 2.5" duals, A500 trans, and 3.55s. So am I correct in assuming the cam isn't too big, and it should be pulling more vacuum than it is?
So how did the 360 run? If you re-used the timing set, cam, etc., etc, out of the old motor AND it ran well, unless you screwed something up installing them, I can't believe the timing set would now be a problem.
"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
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Re: Fresh Magnum 318 is a DOG!
[Re: 6PakBee]
#1144985
12/27/11 06:13 PM
12/27/11 06:13 PM
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Joined: Apr 2007
Posts: 2,327
Glendale, AZ
69L78Nova
OP
Banned. Forever.
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OP
Banned. Forever.
Joined: Apr 2007
Posts: 2,327
Glendale, AZ
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The 360 ran great with that setup, considering it had stock dished pistons over .100" in the hole. Pulled this boat into the 14s, but developed a bottom end knock. I had the 318 laying around so I went through it and put it in. The 318 pistons are the stock flat tops, about .050" down. I'm thinking I put the timing set on a tooth off or something. It's gotta be. Everything else is the same, heads, intake, cam/lifters, pushrods, timing set, and carb. I can't think of what else it could be....
1969 Nova
454/M21/3.31
Mild mid-11 second weekend cruiser
1994 F150 XLT Super Cab 2WD
5.0/4R70W/3.55
(Daily driver)
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Re: Fresh Magnum 318 is a DOG!
[Re: mikemee1331]
#1144987
12/27/11 07:00 PM
12/27/11 07:00 PM
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Joined: Apr 2007
Posts: 2,327
Glendale, AZ
69L78Nova
OP
Banned. Forever.
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OP
Banned. Forever.
Joined: Apr 2007
Posts: 2,327
Glendale, AZ
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Yes, it is used, but hardly has any miles on it. I'll pick up a new one when I pull the timing cover
1969 Nova
454/M21/3.31
Mild mid-11 second weekend cruiser
1994 F150 XLT Super Cab 2WD
5.0/4R70W/3.55
(Daily driver)
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Re: Fresh Magnum 318 is a DOG!
[Re: 69L78Nova]
#1144988
12/27/11 07:42 PM
12/27/11 07:42 PM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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Out on a limb but I'm thinking with 16-17 in hg the cam timing is OK and the prob is in the timing: find/confirm exact TDC/set initial at 15 for a start/proper firing order/pickup gap/rotor phasing/good curve, I'm assuming there's no vac leak. yes a compression test will confirm that the long block itself is OK
live every 24 hour block of time like it's your last day on earth
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Re: Fresh Magnum 318 is a DOG!
[Re: RapidRobert]
#1144989
12/27/11 07:55 PM
12/27/11 07:55 PM
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Joined: Apr 2010
Posts: 4,154
bethlehem pa
mikemee1331
master
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master
Joined: Apr 2010
Posts: 4,154
bethlehem pa
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Quote:
Out on a limb but I'm thinking with 16-17 in hg the cam timing is OK and the prob is in the timing: find/confirm exact TDC/set initial at 15 for a start/proper firing order/pickup gap/rotor phasing/good curve, I'm assuming there's no vac leak. yes a compression test will confirm that the long block itself is OK
good point 'other RR', i didn't even notice the vac number! perhaps too the dizzy is off a tooth which he can check when he does a TDC check. 
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Re: Fresh Magnum 318 is a DOG!
[Re: RapidRobert]
#1144991
12/27/11 08:16 PM
12/27/11 08:16 PM
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Joined: Apr 2010
Posts: 4,154
bethlehem pa
mikemee1331
master
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master
Joined: Apr 2010
Posts: 4,154
bethlehem pa
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Quote:
Quote:
good point 'other RR',
Didn't know if it was noticeable but I still have a hangover from that day 
i was clueless. just thought your response funny. i know you've had a  in the past. i have too and worse of all, he was right! i have alot of respect for his opinions (and humor) 
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