Hey all, looking for a little advice on an oil for our new showcar. While its more of a racing engine than a street engine, the oil we are looking for will be used for cruising around town and car shows, so many cold starts, very few rpms, and almost no throttle.
Background on the engine, it is a 2009 Mopar performance 572 megablock hemi base, that has only been opened up to a 528. Full 2400hp bottom end with cp pistons, all cryo treated and a coated piston skirts. 8.2:1 compression. Running a 750ish lift cam, with heavy ramps, and i think 750 lb valve spring pressure, but is full roller valvetrain. Engine is running high volume oil pump, with a oil cooler, with a 10 quart total system capacity. planning on running with an oil temp and pressure gauge. The rest of the engine is built to handle around 2400 overall, so its a stout build for sure. Its got a ported 871 blower on top, and boost will vary depending if its at a show or driving to walmart. Goal for engine, is around 1700-1800 e85, and 2200 alky. It also has a nitrous plate to help lower intake charge temp
The bottom end was put together by a local builder, who wants to see between a 40-60 weight oil in it for racing, depending if where on e85 or alky. He said he wanted the oil pressure to be about 70-75 psi at 6500, which is the max we are going to spin it. He wanted nothing more that 75, because i belive the bypass valve is at 83-85 psi. For street he said he would like a thinner oil just due to the cold starts, and the fact that the engine isnt going to get abused on the street. It is only going to be run twice a year in the spring on the track, then the rest at shows, and around 500 miles a year or so. It will be on e85 on the street and shows.
I know this isnt really a PCMO, but i figured this is a good place to start, seeing as im not looking for a racing oil. Also sorry about the wall of text
Thanks!
Brent
Background on the engine, it is a 2009 Mopar performance 572 megablock hemi base, that has only been opened up to a 528. Full 2400hp bottom end with cp pistons, all cryo treated and a coated piston skirts. 8.2:1 compression. Running a 750ish lift cam, with heavy ramps, and i think 750 lb valve spring pressure, but is full roller valvetrain. Engine is running high volume oil pump, with a oil cooler, with a 10 quart total system capacity. planning on running with an oil temp and pressure gauge. The rest of the engine is built to handle around 2400 overall, so its a stout build for sure. Its got a ported 871 blower on top, and boost will vary depending if its at a show or driving to walmart. Goal for engine, is around 1700-1800 e85, and 2200 alky. It also has a nitrous plate to help lower intake charge temp
The bottom end was put together by a local builder, who wants to see between a 40-60 weight oil in it for racing, depending if where on e85 or alky. He said he wanted the oil pressure to be about 70-75 psi at 6500, which is the max we are going to spin it. He wanted nothing more that 75, because i belive the bypass valve is at 83-85 psi. For street he said he would like a thinner oil just due to the cold starts, and the fact that the engine isnt going to get abused on the street. It is only going to be run twice a year in the spring on the track, then the rest at shows, and around 500 miles a year or so. It will be on e85 on the street and shows.
I know this isnt really a PCMO, but i figured this is a good place to start, seeing as im not looking for a racing oil. Also sorry about the wall of text
Thanks!
Brent
