Special break-in oil for my LS7?

[parsonsj]

I ordinarily go with how GM does things, so I was planning on filling my freshly rebuilt LS7 with Mobil1 and changing it in 500 miles. My engine builder has a whole procedure for that:



http://blog.iimuchfabrication.com/?p=512

[71RS/SS396]

John, We run the engines on the dyno to break them in with Gibbs or Brad Penn break in oil, we then drain it, cut the filter open to check for any nasty chunks, then leak it down, if all is good on the leak down then we ship it and recommend Mobil 1 5w-30. Kurt doesn't seem to be too particular about any one brand of oil.

[bulldogchevy]

http://www.summitracing.com/parts/nal-88862586

[AMSOILGUY]

Another option is AMSOIL's break in oil. Plus a full synthetic motor oil that will protect your engine shipped to your door!

[intocarss]

We've used Brad Penn, Joe Gibbs, Red Line and Lat racing oils

[67ragtp]

Hey John - Im curious what cam choice you made for the new engine. Im thinking of sending my heads to Richard at WCCH and currently use the katech torquer 110 cam. Really like the low end grunt this cam gives but think Im giving up 50 to 75 hp on the top. Can you tell us what mods you made to your 427?

Thanks Rich

[parsonsj]

Thanks for the replies. I've got the Joe Gibbs stuff here already, so that's my break in oil. After that, I'm not sure what to use. I have 10 qts of the M1 0W-40, but I'm not sure I'll use it. Anybody got a recommendation? Amsoilguy?

So engine mods:

Wiseco forged pistons, 11.5:1 CR. The rest of the bottom end is stock, and it's been align-honed with ARP studs, along with new bearings (set to .0025" clearance). My engine builder wanted to trade out the factory titanium rods, and I wouldn't let him. Once you do that, then you need a new crank, or lots Mallory metal slugs to balance it. Then you need a bigger oil pump, etc....

The pistons are a few grams lighter than stock so it balanced easily with some lightening holes in the crank.

The cam is a Norris spec special grind from Comp Cams. .613/.613 lift, with approximately 232/244 duration, etc. Just your ordinary cam bump up. The heads are ported a bit, and all the chambers are set to 70 cc, with new exhaust valves, re-coated intake valves (they're titanium too), new guides and a valve job. Oh and new BTR (Brian Tooley Racing) springs. Tuning will include new LS9 injectors.

The engine made 540 rwhp before... and it should make about that after. The tune will be a bit fatter so that will offset any mild power gains from the heads and pistons. It used to pull hard right to redline, and it better do it now.

[AMSOILGUY]

Sorry for the late response I have been on vacation snowmobiling. AMSOIL doesn't have a 0-40. Not sure of the conditions you will be using it in but I feel confident it won't be in severaly cold weather so your good there. With viscosity of 40 AMSOIL offers this product. I can get you pricing and I do have a promotion going for lateral-g members.
Jake