Timing Chain/Gear Question
Thread Starter
1st Gear Member
Joined: Apr 2006
Posts: 94
From:
Timing Chain/Gear Question
Hey,
I'm rebuilding my 289 and have replaced my stock cam with the Edelbrock Performer RPM cam. I'm going to buy my new timing chain/gear this afternoon and had a couple of questions that y'all might be able to help me with.
1. Edelbrock easy step by step directions says I need to match a Edelbrock Performer Link chain/gear with my new cam. Says if I don't, I'll have trouble setting the time. Can I assume the good folks at Edelbrock are just trying to sell me some more of their fine autoparts? Reason I asked is that in the Summit catalog, Edelbrock's chain/gear is $59.88 and Summit's is $20.95 for standard and $35.95 for roller. Sorta big difference in price there.
(Sames goes with the valve springs, they say I need to swap out my springs with theirs, but seeing as I just had the heads rebuilt and the springs replaced, I thing I'm gonna stick with what I just got)
2. If I go with the Summit gear/chain, I have the option of "standard" and "roller" types. Do I assume I want to go with the "roller" type?
3. The Summit roller type and the Edelbrock gears have keyways for "standard", "4 degree advance" and "4 degree retard". So, what does 4 degrees one way do for me?
Thanks!!
I'm rebuilding my 289 and have replaced my stock cam with the Edelbrock Performer RPM cam. I'm going to buy my new timing chain/gear this afternoon and had a couple of questions that y'all might be able to help me with.
1. Edelbrock easy step by step directions says I need to match a Edelbrock Performer Link chain/gear with my new cam. Says if I don't, I'll have trouble setting the time. Can I assume the good folks at Edelbrock are just trying to sell me some more of their fine autoparts? Reason I asked is that in the Summit catalog, Edelbrock's chain/gear is $59.88 and Summit's is $20.95 for standard and $35.95 for roller. Sorta big difference in price there.
(Sames goes with the valve springs, they say I need to swap out my springs with theirs, but seeing as I just had the heads rebuilt and the springs replaced, I thing I'm gonna stick with what I just got)
2. If I go with the Summit gear/chain, I have the option of "standard" and "roller" types. Do I assume I want to go with the "roller" type?
3. The Summit roller type and the Edelbrock gears have keyways for "standard", "4 degree advance" and "4 degree retard". So, what does 4 degrees one way do for me?
Thanks!!
2nd Gear Member
Joined: Jun 2006
Posts: 181
From: West Virginia
RE: Timing Chain/Gear Question
I would listen to the Folks at Edelbrock. Sounds to me like you are wanting to put good quality parts in your rebuild, so I would take their advice if I were you. In my opinion, your valvetrain should be a matched set with matching components, preferably from the same manufacturer. Reason is, the alignment mark in the timing set will be aligned to that particular cam. Valve springs are typically another component that should be matched to the cam. Different cams require different valve springs with different spring pressures, etc. On the engine I am building, I had a set of newly rebuilt heads, but when deciding to go with a higher lift cam, I bought the complete cam kit, which included cam, springs, retainers, locks, lifters, timing chain, etc. JMHO
5th Gear Member
Joined: Dec 2005
Posts: 2,634
From: SC
RE: Timing Chain/Gear Question
I just went through all this. You don't have to get Edelbrocks stuff but, I would install a double roller type..
ORIGINAL: Hettar
Hey,
I'm rebuilding my 289 and have replaced my stock cam with the Edelbrock Performer RPM cam. I'm going to buy my new timing chain/gear this afternoon and had a couple of questions that y'all might be able to help me with.
1. Edelbrock easy step by step directions says I need to match a Edelbrock Performer Link chain/gear with my new cam. Says if I don't, I'll have trouble setting the time. Can I assume the good folks at Edelbrock are just trying to sell me some more of their fine autoparts? Reason I asked is that in the Summit catalog, Edelbrock's chain/gear is $59.88 and Summit's is $20.95 for standard and $35.95 for roller. Sorta big difference in price there.
(Sames goes with the valve springs, they say I need to swap out my springs with theirs, but seeing as I just had the heads rebuilt and the springs replaced, I thing I'm gonna stick with what I just got)
2. If I go with the Summit gear/chain, I have the option of "standard" and "roller" types. Do I assume I want to go with the "roller" type?
3. The Summit roller type and the Edelbrock gears have keyways for "standard", "4 degree advance" and "4 degree retard". So, what does 4 degrees one way do for me?
Thanks!!
Hey,
I'm rebuilding my 289 and have replaced my stock cam with the Edelbrock Performer RPM cam. I'm going to buy my new timing chain/gear this afternoon and had a couple of questions that y'all might be able to help me with.
1. Edelbrock easy step by step directions says I need to match a Edelbrock Performer Link chain/gear with my new cam. Says if I don't, I'll have trouble setting the time. Can I assume the good folks at Edelbrock are just trying to sell me some more of their fine autoparts? Reason I asked is that in the Summit catalog, Edelbrock's chain/gear is $59.88 and Summit's is $20.95 for standard and $35.95 for roller. Sorta big difference in price there.
(Sames goes with the valve springs, they say I need to swap out my springs with theirs, but seeing as I just had the heads rebuilt and the springs replaced, I thing I'm gonna stick with what I just got)
2. If I go with the Summit gear/chain, I have the option of "standard" and "roller" types. Do I assume I want to go with the "roller" type?
3. The Summit roller type and the Edelbrock gears have keyways for "standard", "4 degree advance" and "4 degree retard". So, what does 4 degrees one way do for me?
Thanks!!
5th Gear Member
Joined: Dec 2005
Posts: 2,634
From: SC
RE: Timing Chain/Gear Question
Have not got to that point yet but, I'll be installing it straight up..
ORIGINAL: Hettar
Thanks for the info... Slickman, did you use the 'standard' key holder on the small sprocket?
Thanks for the info... Slickman, did you use the 'standard' key holder on the small sprocket?
3rd Gear Member
Joined: Sep 2005
Posts: 512
From:
RE: Timing Chain/Gear Question
There are two reasons many timing gear/chain sets have various keyways. One is to give the option of advancing or retarding the cam timing (to raise or lower the power band in the rev range)
The other reason is so that when you properly set your cam up using a degree wheel and dial indicator, you can set it accurately, and correct any machining errors. Have a look at the edelbrock website, it gives great info about how to degree in a cam.
The other reason is so that when you properly set your cam up using a degree wheel and dial indicator, you can set it accurately, and correct any machining errors. Have a look at the edelbrock website, it gives great info about how to degree in a cam.
5th Gear Member
Joined: Dec 2005
Posts: 2,634
From: SC
RE: Timing Chain/Gear Question
And some of that will vary from one cam manufacture to the next. Comp Cams for example has an advance already built into them when you install them straight up.
ORIGINAL: fast66
There are two reasons many timing gear/chain sets have various keyways. One is to give the option of advancing or retarding the cam timing (to raise or lower the power band in the rev range)
The other reason is so that when you properly set your cam up using a degree wheel and dial indicator, you can set it accurately, and correct any machining errors. Have a look at the edelbrock website, it gives great info about how to degree in a cam.
There are two reasons many timing gear/chain sets have various keyways. One is to give the option of advancing or retarding the cam timing (to raise or lower the power band in the rev range)
The other reason is so that when you properly set your cam up using a degree wheel and dial indicator, you can set it accurately, and correct any machining errors. Have a look at the edelbrock website, it gives great info about how to degree in a cam.
Thread Starter
1st Gear Member
Joined: Apr 2006
Posts: 94
From:
RE: Timing Chain/Gear Question
I checked out the install instructions on the Edelbrock website and they answered it in one sentence...
DO NOT install a Performer-Plus or Performer-RPM camshaft in an advanced or a retarded position.
DO NOT install a Performer-Plus or Performer-RPM camshaft in an advanced or a retarded position.
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