ROSS Racing Pistons for the 400 Chevrolet are manufactured on advanced 2618-t6 forgings. Most feature double spiral locks (or wire locks in some applications), forced pin oilers with oil distribution grooves, and lock removal indentations. They also feature gas accumulator grooves in the second land, as well as optional gas ports.
Flat top pistons in a 400 Chevrolet engine will generally provide compression ratios in the 11.5:1 range which makes them a good option for engines with aluminum heads and larger than stock camshafts. Valve reliefs are configured to work with most types of standard and aluminum cylinder heads and will normally fit camshafts to well over .600 valve lift. 18 degree pistons are also available, and will work fine with 23 degree cylinder heads.
Dish top pistons in a 400 Chevrolet engine will generally provide compression ratios in the 6.0 to 10.0:1 range which makes them a good option for engines with all heads and larger than stock camshafts. Valve reliefs are configured to work with most types of standard and aluminum cylinder heads and will normally fit camshafts to well over .600 valve lift. 18 degree pistons are also available, and will work fine with 23 degree cylinder heads.
Dome top pistons in a 400 Chevrolet engine will generally provide high compression ratios which makes them a good option for engines with aluminum heads and larger than stock camshafts. Valve reliefs are configured to work with most types of standard and aluminum cylinder heads and will normally fit camshafts to well over .600 valve lift. 18 degree pistons are also available.
