Dynatec cam specs

Engine discussion.

Dynatec cam specs

by NVMYEH » Thu Sep 18, 2014 11:43 am

Hey guys I purchased a short motor some time ago for my EH it seemed like a steal at $100. That got me a 186 block 60thou over. It came with what I'm told was a 'warm' Dynatec cam and straight cut timing gears. Motor is apart now getting new bearings and rings.
I know these cams aren't the best in V8s but I can't find anyone that has had a prob with them in a six. I want to know if anyone has used one or knows of one being used and can tell me if they are any good. Numbers on the end of the shaft read CM6??? I can't find anything on the net about them.

Thanks in advance.
 
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Re: Dynatec cam specs

by Harv » Thu Sep 18, 2014 6:43 pm

AFAIK, the Dynotec red motor lumpsticks should have a part number starting with CM:

CM202 (standard cam) duration @0.050" lift 194º/202º, valve lift 0.390"/0.410"
CM203 (stage 1) duration @0.050" lift 208º/208º, valve lift 0.420"/0.420"
CM205 (stage 2) duration @0.050" lift 214º/214º, valve lift 0.429"/0.429"
CM206 (stage 3) duration @0.050" lift 224º/224º, valve lift 0.467"/0.467"

For more info, you could try HorsePower World, who still flog them (1/2 Hempel Street Wodonga, Victoria, email info@horsepowerworld.com.au, telephone (02) 60242697), or Precision (104 Derby Street Silverwater, NSW, telephone 1300364350 or (02) 87999999, email:nswtrade@precisionintl.com).

Cheers,
Harv (appreciator of red bumpsticks)
 
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Re: Dynatec cam specs

by NVMYEH » Tue Sep 23, 2014 5:21 pm

Thanks Harv

Your info is very helpful. I'll get my engine guy to have another look for me and try find out which one it is..

Thanks again
 
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Re: Dynatec cam specs

by claysummers » Wed Jul 10, 2019 2:33 am

Old post I know but I picked up a dynotec cd205r Cam off gumtree for a good price. I’m hoping it’s not too hairy for the 179 I’m putting together for my FB ute, running fb crash box. I don’t plan doing much driving in traffic but rolling starts in second could be an issue if I run taller gears? Also durability of the crashie of course. I’ll have to be prudent omg omg wtf. I do have four spare boxes.
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Re: Dynatec cam specs

by Harv » Wed Jul 10, 2019 7:28 am

The 20º extra duration should be OK (lumpy but not a pig). There is a fair bit more lift than standard though - not sure how much lift a standard 179 head will handle though suspect it should be OK with standard pistons.

The crashie will handle the load provided you are gentle with the clutch. Spot weld the synchro snap rings if needs be.

Cheers,
Harv
 
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Re: Dynatec cam specs

by claysummers » Wed Jul 10, 2019 11:08 am

Thanks Harv. I do have a yellaterra stage 1 spec head I could run but it is a 202L so non adjustable rockers.

Would the lift be a potential issue due to clearance or is it using stock rocker setup working the cam too hard that concerns you?
Cheers
Clay
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Re: Dynatec cam specs

by Harv » Wed Jul 10, 2019 11:43 am

Clearance, and coil bind.

Cheers,
Harv
 
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Re: Dynatec cam specs

by claysummers » Wed Jul 10, 2019 12:04 pm

Coil bind. Didn’t think of that. Thanks again Harv.
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Re: Dynatec cam specs

by Rob » Sun Jul 14, 2019 11:12 am

I had to change my push rods and go to different ratio rockers
 
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Re: Dynatec cam specs

by claysummers » Sat Aug 24, 2019 9:34 am

Changing the rockers would be a way to negate spring bind but kinda defeats the purpose of the extra lift?
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