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Author Topic: cam question  (Read 12883 times)

Offline Layne

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cam question
« on: May 20, 2009, 05:22:44 pm »
I'm running a lunati bracket master II.  I just broke it in and put a synthetic blend in without realizing it.  Lunanti says not to run synthetic or a blend in there. Am I going to have any problems, or do I have to drain the oil again?
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77 c-10 - 77 400 86 700r4 "Emmy"
83 citation - 2.5L Four on the Floor!
88 sierra - reman 350 700r4 "Eleanor"
All normal practicality and rational money handling goes out of the window when it comes to my truck.

Offline VileZambonie

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Re: cam question
« Reply #1 on: May 20, 2009, 06:21:54 pm »
I would dump the oil and run a conventional 10w30 to break it in.
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline MITOYZ

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Re: cam question
« Reply #2 on: May 27, 2009, 01:33:44 pm »
The main problem that leads to cam failure with oil is the lack of zinc,you should use a zinc additive during break in but i don't know if it would do you any good now.
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Offline SUX2BU99

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Re: cam question
« Reply #3 on: May 28, 2009, 12:47:21 pm »
I've decided now that with each oil change I'm going to add a bottle of GM EOS. Get it at most any GM dealer I would imagine. Then I can run whatever oil I want and not worry about how they are reformulating it.
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85 Chevy Silverado C10 short, wide, yellow, 2wd. Lowered, 60-over 350 with Dart Iron Eagle heads and Comp Cams XE268 cam, TH350 w/ shift kit, 3.40 Gov-lok 12 bolt.

Offline VileZambonie

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Re: cam question
« Reply #4 on: May 28, 2009, 01:11:44 pm »
I remember when I worked at a GM dealer and they couldn't give EOS away. I had cases of it given to me by the parts guy. I'm down to about 4 or 5 old bottles. Ford also makes one too that I have a few quarts of.
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline HAULIN IT

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Re: cam question
« Reply #5 on: May 28, 2009, 02:14:11 pm »
The EOS was rummored to have been "reformulated" a couple years ago by an oil analyst on another forum I belong to, don't know this to be fact though. I've been using Rotella & ZZDP (a couple guys from the Buick GS club came up with it). No short term way to know what is really the answer...if you had a fleet of flat tappet cam engines, you could gain some good knowledge. Lorne 
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Offline Jay2D2

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Re: cam question
« Reply #6 on: May 28, 2009, 02:19:39 pm »
GM EOS is a reformulated version compared to sevearl years ago

Alos when I was working in a Ford dealership they actually stocked GM EOS and GM assembly lube because they said it was better then their own, I bleieve sever TBSs mentioned using the GM versions also
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Offline eventhorizon66

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Re: cam question
« Reply #7 on: May 28, 2009, 05:42:37 pm »
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'85 C10 SWB 350 700R4 TKO600

Offline VileZambonie

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Re: cam question
« Reply #8 on: May 28, 2009, 06:38:07 pm »
Never heard of that stuff before but their description calls it zppd instead of zddp and says roller rockers not roller cams. Who wrote the description? Their secretary? lol
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              ⌠ŻŻŻŻŻ'   [☼===☼]
              `()_);-;()_)--o--)_)

74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline HAULIN IT

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Re: cam question
« Reply #9 on: May 29, 2009, 07:39:16 am »
Sorry Guys, That's the stuff I've been using ;) Lorne
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Offline MITOYZ

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Re: cam question
« Reply #10 on: May 29, 2009, 10:03:19 am »
I,ve always used a good 10w30 oil and used zinc additive from crane cams for break in of cams or a rebuilt motor.After a couple hours run time I drain the oil and change the filter and use Royal Purple.
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Offline eventhorizon66

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Re: cam question
« Reply #11 on: May 29, 2009, 10:47:04 am »
Quote from: VileZambonie on May 28, 2009, 06:38:07 pm
Never heard of that stuff before but their description calls it zppd instead of zddp and says roller rockers not roller cams. Who wrote the description? Their secretary? lol

LOL.  That's just a dealer.  So I wouldn't be surprised if a secretary wrote that.

Here's the company's website: http://www.zddplus.com/
« Last Edit: May 29, 2009, 10:49:25 am by eventhorizon66 »
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'85 C10 SWB 350 700R4 TKO600

Offline SUX2BU99

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Re: cam question
« Reply #12 on: June 01, 2009, 01:59:55 pm »
Man, what do you trust anymore eh? If EOS has been reformulated too (presumably not for the better) than I might just buy the CompCams break-in lube additive. I was using Rotella as well but I've been hearing that's going to be reformulated too as they tighten down on diesel engine emissions and such. Hard to know what to believe. At least (I hope) I could trust that CompCams (or similar) would keep their stuff the same since it's made for exactly what I'm concerned with: wearing down a flat-tappet lobe on my flat-tappet cam using 'modern' engine oils.
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85 Chevy Silverado C10 short, wide, yellow, 2wd. Lowered, 60-over 350 with Dart Iron Eagle heads and Comp Cams XE268 cam, TH350 w/ shift kit, 3.40 Gov-lok 12 bolt.

Offline Layne

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Re: cam question
« Reply #13 on: June 01, 2009, 10:32:22 pm »
So, uh my 305 blew up the other day.  I did find a sbc 400 for $200. I was told by a friend that my carb prolly gas soaked my oil, so my cam problem's irrelevent. Lol. Cam's trashed too, so I'm looking at another lunati. Oh yea my carbs a holley 750, and my friend says thats even too big for a 400. Should I get a dif carb or can I kinda tune it without the engine running?
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77 c-10 - 77 400 86 700r4 "Emmy"
83 citation - 2.5L Four on the Floor!
88 sierra - reman 350 700r4 "Eleanor"
All normal practicality and rational money handling goes out of the window when it comes to my truck.

Offline hotrod87

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Re: cam question
« Reply #14 on: June 01, 2009, 11:25:03 pm »
I am running a holley 750 on a 383....no problems what so ever
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