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New engine build what weight of Oil. #691703 05/07/10 07:19 PM 05/07/10 07:19 PM
Joined: Mar 2008 Posts: 724 PA USA F flatiron OP super stock
flatiron OP super stock F Joined: Mar 2008 Posts: 724 PA USA	Hopefully be putting my new 360 in on Monday what weight of Oil should I use for break in and regular running. Here are some spec's 360 .030 over crank ground .01/.01 stock rods/Arp bolts Main brg clearence .0025 Rod brg clearence .0015 end play .004 I'm alittle bit concerned about the mains. When the crank was reground it was taken to the low

Re: New engine build what weight of Oil. [Re: flatiron] #691704 05/07/10 08:11 PM 05/07/10 08:11 PM
Joined: Mar 2007 Posts: 2,252 Sebring, Florida M Mopar Grandpa top fuel
Mopar Grandpa top fuel M Joined: Mar 2007 Posts: 2,252 Sebring, Florida	20W50 and an additive like comp cams if you're running a flat tappet cam. You need zinc and most oils do not contain enough. I wouldn't worry about your main bearing clearance, you should be fine. Run the engine at 2,000rpm for about 20 minutes to break in the cam and lifters.

Re: New engine build what weight of Oil. [Re: Mopar Grandpa] #691705 05/07/10 08:19 PM 05/07/10 08:19 PM
Joined: Mar 2008 Posts: 724 PA USA F flatiron OP super stock
flatiron OP super stock F Joined: Mar 2008 Posts: 724 PA USA	I'm running a MP .509 hydraulic with PRW stainless roller rockers.

Re: New engine build what weight of Oil. [Re: flatiron] #691706 05/07/10 08:49 PM 05/07/10 08:49 PM
Joined: Mar 2007 Posts: 2,252 Sebring, Florida M Mopar Grandpa top fuel
Mopar Grandpa top fuel M Joined: Mar 2007 Posts: 2,252 Sebring, Florida	If it were a roller cam you wouldn't need the additional zinc. Always add the additive when you change your oil. Without the additional zinc you'll wipe out the lobes on the cam. Comp Cams used to have an article on this very topic. You might want to check out their web site.

Re: New engine build what weight of Oil. [Re: flatiron] #691707 05/07/10 09:02 PM 05/07/10 09:02 PM
Joined: May 2003 Posts: 6,561 Downtown Roebuck Ont Twostick Still wishing...
Twostick Still wishing... Joined: May 2003 Posts: 6,561 Downtown Roebuck Ont	15w40 Rotella, Delvac or Delo 400 has enough zinc in it (not as much as it used to but enough. 11-1200ppm IIRC. used to have 1600) and you can get it at any Walmart cheap. Have someone turn the engine over with a bar while you watch the lifters to make sure they ALL rotate in their bores. Replace any that don't turn. If the motor is all buttoned up, unbutton it and verify they turn. If you fire it and one isn't turning your cam will be flat in about 10 seconds and it will do it no matter what kind of oil you had in it. Kevin

Re: New engine build what weight of Oil. [Re: Twostick] #691708 05/07/10 11:23 PM 05/07/10 11:23 PM
Joined: Dec 2009 Posts: 1,074 detroit, mi POS Dakota super stock
POS Dakota super stock Joined: Dec 2009 Posts: 1,074 detroit, mi	Quote: 15w40 Rotella, Delvac or Delo 400 has enough zinc in it (not as much as it used to but enough. 11-1200ppm IIRC. used to have 1600) and you can get it at any Walmart cheap. Have someone turn the engine over with a bar while you watch the lifters to make sure they ALL rotate in their bores. Replace any that don't turn. If the motor is all buttoned up, unbutton it and verify they turn. If you fire it and one isn't turning your cam will be flat in about 10 seconds and it will do it no matter what kind of oil you had in it. Kevin This is quite possibly the biggest reason for failed flat tappet cams that people overlook. Lifter Rotation.

Re: New engine build what weight of Oil. [Re: POS Dakota] #691709 05/07/10 11:35 PM 05/07/10 11:35 PM
Joined: Jan 2003 Posts: 20,755 A collage of whims topside Too Many Posts
topside Too Many Posts Joined: Jan 2003 Posts: 20,755 A collage of whims	The lighter the oil, the less power required to pump it, and the more quickly it gets everywhere it needs to go. I've been running 10W30 in the racecar for years, and I heat it before every cold start I can, using a Moroso pan heater pad. Zero problems. Roller cam, but I still add a little GM additive for the sake of the other valvetrain parts. The car sees 8,000RPM. On my flat tappet cars, I've been adding 1/2 container of the GM additive when changing oil.

Re: New engine build what weight of Oil. [Re: topside] #691710 05/08/10 12:21 AM 05/08/10 12:21 AM
Joined: Oct 2004 Posts: 8,165 Left Coast B BobR master
BobR master B Joined: Oct 2004 Posts: 8,165 Left Coast	Brad Penn break in oil.

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