I just finished building a 383 1-piece rear engine and I started it and set the timing and checked the fluids but I am getting some blueish white smoke out the tail pipes. Is this normal? I had the short block done at a professional machine shop that handles nothing but racing engines. The engine has 1/16 top rings and forged SRP pistons, Scat steel crank and 4340 rods.

I was worried that the engine is burning oil already. I don't even have 1 mile on it just a quick spin up the street where a puff of smoke was following me. Does this have something to do with the rings seating?

Do 1/16 rings have a harder time seating than stock ones?

Sometimes a new engine will smoke a little untill the rings seat.

did you follow any sore of break in procedure or just fire it up and go?

When I first started it up, I brought the RPM up to 2,000-2,500 and fluctuated it for a while. My friend thinks that there might be oil/antifreeze in the exhaust system from my 355 that blew up a month ago. He said it may just be burning out.

how long is "a while"? break-in time should be like 20-30 mins. bro

Could be leftover. When I fired my 383 up I had no break in time since it was a roller cam. I first did the timing and adjusted valves with engine running. From there I drove it lightly for the first 500 miles. I accually took it on a road trip that day for 300 miles I think and when I came back all looked good and 3K miles later no oil burn and plugs look great.

You don't need to break in a roller motor like you do a flat tappet as far as cam break-in goes.

You'll still need to let the rings seat properly though.

Thats exactly what happend to me. It got my blood pressure up a few points though.

Usually if you don't seat the rings initially it will take longer to seat.

I wouldn't worry about it right now. I blew up my 383 and sent oil and coolant into the exhaust. I fogged up the neighborhood when I fired up the new motor.

It's not uncommon to have an oil film on the exhaust, block etc. Generally a 10 or 20 mile drive burns everything off.

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Thanks for the support Guys! I went out shortly after I posted last time and the smoking went away like 30 seconds after I started it. It has not come back and I have 200 miles that I put on the new motor in two days. It was the oil and anti freeze that was trapped in the pipes, cause I had pulled a plug and it was dry and tan.

I still need like 300 miles on my SPEC stage 3 clutch before I can get on it. It grabs way more brutal from a stop than my cenetrforce did. Feels like the car is gonna fly every time you launch whether you want it to or not. Little bit of chatter but nothing to worry about.

If it was antifreeze you had better change you oil and hope your bearings did not suffer much if at all. Antifreeze is an anti-lubricant as far as I am concerned. Antifreeze in the oil is bad.