mcdoogle1975
Full Access Member
Just wondering what is the recommended breakin procedure on a new forged build. I know there are varied opinions but just wondering how others have done it.
Thanks
Paul
Thanks
Paul
I will start by saying that I have never built a viper engine. My response is just based on the other engines I have built 2 of which had forged internals.
I use amsoil break in oil. High in zinc and phosphorous they say it helps with proper ring seating. I have never had a problem. Idle for 15 min. Drive 500 miles in a few installments. I keep revs under 4000 until the last 50 or so miles. Change oil. Make sure all is drained. Replace with your oil of choice. Let her rip. For piece of mind you can also do a leak down test at the end of break in just to make sure rings are doing there job correctly. Good luck
Make five or six medium-throttle accelerations to about 4,500 rpm before letting off in gear and coasting back down to 20 miles-per-hour.
Run a couple hard throttle accelerations up to about 5,000 rpm and once again coast back down to 20 miles-per-hour.
Let the engine cool, change the oil and filter, and check the coolant level.
Drive the next 500 miles normally, keeping the engine below 5,000 rpm and minimizing operation at idle.
Guess we take a different approach. We run a non detergent oil for break in. Around 500 miles of different rpm but below 3k. I like to ensure rings seat well before high rpms as well as letting valve springs break in nicely. The key is getting everything up to operating temp, at different speeds, many cool downs, warm ups. Allowing expansion and contraction of rings/pistons.
Than change oil to 15/50 M1
I would just go with whatever the builder is recommending since he built it