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Unread 05-18-2011, 06:53 PM   #1
Blacky15
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Edelbrock Cam Issues

I have a AMC 360 in my CJ7, that I just dropped an Edelbrock Torquer cam (0-5500) into. It is currently sitting on 35" BFG's that I could easly spin in the dirt with the factory setup. After installing this cam into the Jeep, it is completely flat. No acceleration or torque. I have the complete Edelbrock package (cam, intake, carb) along with fenderwall headers. Any ideas on what would cause this?
I have tore the apart the carb and cleaned top to bottom, didn't help at all. I am completely confused and lost. Please help.....

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Unread 05-18-2011, 07:22 PM   #2
baldfatdad
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I don't know anything about that cam. Lift, duration over lap. That said I put a .420 lift cam in my 258. Got it, lifters, double springs and timing chain set for $50. It was dead just like yours. I advanced it 7 degrees and the thing came to life. Pulling from 400 rpm on up.
First call Edelbrock and tell them the problem. Ask the RPM that cam is designed for. If its anything over 3000 rpm that could be your problem.
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Unread 05-19-2011, 03:38 PM   #3
Blacky15
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Gave Edelbrock a call and they said that I should be sitting at 12 degrees before top dead center.
The cam information is below. It is designed for RPM range of Idle through 5500. I guess my next step is to get a timing light and double check the timing. Could the timing chain be off just a hair also?

Duration at 0.006" Lift: Intake: 278° Exhaust: 288°
Duration at 0.050" Lift: Intake: 204° Exhaust: 214°
Lift at Cam: Intake: 0.280" Exhaust: 0.295"
Lift at Valve: Intake: 0.448" Exhaust: 0.472"
Timing at 0.050" lift: Open Close
Intake: 3° ATDC 27° ABDC
Exhaust: 42° BBDC 8° BTDC
Centerlines: Lobe Separation - 110° Intake Centerline - 105°
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Unread 05-19-2011, 05:17 PM   #4
JHW12084
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Quote:
Originally Posted by Blacky15 View Post
Gave Edelbrock a call and they said that I should be sitting at 12 degrees before top dead center.
The cam information is below. It is designed for RPM range of Idle through 5500. I guess my next step is to get a timing light and double check the timing. Could the timing chain be off just a hair also?

Duration at 0.006" Lift: Intake: 278° Exhaust: 288°
Duration at 0.050" Lift: Intake: 204° Exhaust: 214°
Lift at Cam: Intake: 0.280" Exhaust: 0.295"
Lift at Valve: Intake: 0.448" Exhaust: 0.472"
Timing at 0.050" lift: Open Close
Intake: 3° ATDC 27° ABDC
Exhaust: 42° BBDC 8° BTDC
Centerlines: Lobe Separation - 110° Intake Centerline - 105°
if you put the gear on the crank with the mark on top and the gear on the cam with the mark on bottom and dropped your distributor in, you should be on tdc. always use a timing light when setting timing(atleast i always do). did you brake the cam in properly?
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Unread 05-19-2011, 06:27 PM   #5
Blacky15
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I am double thinking myself that maybe the crank moved a little bit while taking off the balancer. I did follow the breakin instructions from Edelbrock. (20 mins above 2500RPMs) Am I right in saying with this setup I should have a ton of power in a little CJ7? I could roast my 33's before the cam change. On top of this package is a Edelbrock 600cfm carb, that should be plenty right?
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Unread 05-20-2011, 05:13 AM   #6
JHW12084
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carb shouldnt matter unless ya had head work done to it., the 600 should be sufficient.....unless the heads are whats drawing the lack of power. my buddy had a 360 amc build for his waggy, and the guy who did the build told him he had to remove a crapload from each intake port for it to breathe. he said the 360's were built with emmisions in mind so there were alot of drawbacks that would rob power. if that helps at all....i know cams are expensive, but maybe try a different one. not from edelbrock, c ause im sure they designed it to work with theor heads and intake.
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Unread 05-20-2011, 05:36 AM   #7
cruiser54
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I'd be suspicious of cam timing being off.
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Unread 05-21-2011, 10:29 AM   #8
Blacky15
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Last night I check TDC and everything is spot on with the timing. I pulled the #1 plug out and checked the rotation 3 times just to make sure and make myself happy. After that I set the timing to 12 degrees, which Edelbrock recommends for this application. Crazy thing now is I fired it up and flames out the carb now? It will start and idle, but once you touch the throttle the flames come. Also getting some crazy popping as well.
I am completely confused now. Thoughts?
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Unread 05-21-2011, 05:51 PM   #9
baldfatdad
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I'm pretty sure you have the timing chain on wrong. That timing set might have multiple key ways or timing marks. Check the paper work that came with it or check with the manufacturer of the set. Or pull the cover off and look. I just went though this with a buddy of mines car. Multiple timing marks on the cam gear and he picked the wrong one. Did the same thing your engine is.
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Unread 05-21-2011, 09:09 PM   #10
Blacky15
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With the multiple options how did you choose the right one? It is a round procket, so in my head I imagine there is really no adjusting it? Can you quick breakdown of how choosing a different keyway wold make a difference? Thanks again for all the help. This site is amazing for help.
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Unread 05-22-2011, 04:33 AM   #11
slowlowford
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The crank gear will have three options if it is adjustable. They are usually marked by a square,circle, and triangle. What you are adjusting is the cams mechanical timing vs. TDC. One mark will be retarted, the middle will be normal, and the last one will be advanced. I don't remember which mark is which besides the middle. Does it start off sluggish then pick up, or stay sluggish the whole way?
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Unread 05-22-2011, 05:03 AM   #12
slowlowford
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Do you have your base timing right. I learned this myself. I set a SBC 8 retarded instead of 8 advanced.
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Unread 05-22-2011, 10:45 AM   #13
baldfatdad
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Slowlowford is right. But the marks aren't side by side. Some times they are quite a bit around the gear. And different manufacturers use different marks. If you don't have the original paper work that came with it, call them and ask about the marks.
You also could have just put the chain on a tooth off.
Don't run the engine until you get it figured out. You can bend a valve.
The extra key ways let you advance or retard the cam. Advanceing a cam moves the RPM it makes power down in the RPM range. Retarding a cam moves the power up the RPM's. These are generalizations. There are books and books written on cams.
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Unread 05-22-2011, 03:15 PM   #14
Blacky15
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It is sluggish the whole way. I has some kickdown at high RPM's but low end is horrible. I would not trust it in a puddle right now. I will tear into it this week and see what I can find the multiple keyways. Does anyone know off the top of their head the marks on a Edlebock timing chain? Thanks again everyone for the help, I will keep the forum updated on the situation.
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Unread 05-26-2011, 11:28 AM   #15
Blacky15
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So I pulled the cover off and found tha cam was 180 degrees off. I rotated that around and got the dots lined back up and bolted her back together. Turn the key and it fired right up like a champ. Thing is it is still popping out of the carb. At idle its great, but only when you give it gas is when it happens. Any thoughts on that? I tried a different carb and it did the same thing. The timing was set with a light to the Edelbrock standard of 12 degrees advanced. Thanks for the help in advance!!!
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