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  #121  
Old 12-30-2018, 09:38 AM
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Originally Posted by schoo View Post
Some body on here said I will need a different distributor drive gear if I change cams(comp cam#35-512-8)is this true and if so have you got a part#
Only if you go from a flat tappet to a roller cam (or vice-versa) The cam's materials are different (steel for the roller, cast iron for flat tappet)
 
  #122  
Old 12-30-2018, 11:56 AM
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Originally Posted by baddad457 View Post
Only if you go from a flat tappet to a roller cam (or vice-versa) The cam's materials are different (steel for the roller, cast iron for flat tappet)
ok Iím going to roller cam. so steel are they all the same I believe I also will change the firing order
 
  #123  
Old 12-30-2018, 12:43 PM
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As far as I know all roller cams are steel.
 
  #124  
Old 12-30-2018, 06:19 PM
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Itz been a while so I think this was covered, but your 89 block is "roller capable", it will need a "spider" & "dog bones" to go with a roller cam.

Most all hi-perf small block Ford cams usually have the notation in their specs "must use 351 firing order".

You will need a steel distributor gear. I'd also suggest you take the time to replace the PIP sensor in the distributor since you have to press off the gear.

Use a Motorcraft part.
 
  #125  
Old 12-31-2018, 10:54 AM
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I am running a comp cam in my 331 and was told by comp that all the cam part numbers that end in -8 are iron based and a steel gear was not needed. Maybe want to double check before you change to steel
 
  #126  
Old 12-31-2018, 01:25 PM
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Originally Posted by Last chance 53 View Post
I am running a comp cam in my 331 and was told by comp that all the cam part numbers that end in -8 are iron based and a steel gear was not needed. Maybe want to double check before you change to steel
thanks guys info keeps me hopping summits got a steel one for $29.99 and also sell comps plastic one for $💯 so I have a good range to choose
 
  #127  
Old 01-01-2019, 01:01 PM
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The -8 are rollers, so are they steel?
 
  #128  
Old 01-01-2019, 02:17 PM
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The comp cams are a ductile lron core, not billet steel. They use a heat treatment on the lobes to control wear on them.
 
  #129  
Old 01-01-2019, 04:07 PM
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Originally Posted by Last chance 53 View Post
The comp cams are a ductile lron core, not billet steel. They use a heat treatment on the lobes to control wear on them.
ok what drive gear am I going to use? I sent an email to comp asking yesterday so donít expect to here from them soon
 
  #130  
Old 01-01-2019, 05:17 PM
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The tech dept. at comp cams told me I could use the stock iron gear.
 
  #131  
Old 01-01-2019, 05:42 PM
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Use a steel gear.

This would be fine for your application if you can't a Motorcraft part.

https://www.summitracing.com/parts/sum-850460/overview/make/ford

https://www.summitracing.com/parts/sum-850461/overview/make/ford


Measure the shaft.

(Edit) larger shaft probably for 351/5.8, my bad.
 
  #132  
Old 01-01-2019, 05:45 PM
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Originally Posted by Last chance 53 View Post
The tech dept. at comp cams told me I could use the stock iron gear.
I just found a video by comp cams on summit tech support (Iím old so canít link it)but it gives a chart and a video shows how to see the difference in cam material and a chart shows drive gear chooses Iím going to use steel
 
  #133  
Old 01-01-2019, 10:15 PM
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Originally Posted by Scndsin View Post
Use a steel gear.

This would be fine for your application if you can't a Motorcraft part.

https://www.summitracing.com/parts/sum-850460/overview/make/ford

https://www.summitracing.com/parts/sum-850461/overview/make/ford


Measure the shaft.

(Edit) larger shaft probably for 351/5.8, my bad.
yes I checked it I have the small shaft
Calling ford tomorrow
 
  #134  
Old 01-02-2019, 11:27 AM
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Mission creep

Hope this isnít a bad sign the drive gear for the distributor that I have looks to be a steel/plastic stock drive gear I need to change out I donít want to change the hole distributor just the gear it has a roll pin and I believe itís a press on gear. The machine shop I use doesnít do this so looking around. The ford dealer says it an obsolete part and canít even get me a part number. A new year project road block?
 
  #135  
Old 01-02-2019, 01:04 PM
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Wow. That's pretty lame. It's not hard to drive out the roll pin. The physical effort to press off the gear is minimal.

This is the first hit I got on Google. I'm sure there's more:

 

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