5vz & 1/3mz Valve Springs [Archive] - Toyota MR2 Message Board

springs, spring, cams, valve, stock, sale, pressure, boost, soft, redline, float, high, fairly, price, check, site, listed, shortly, sea2skytuning.com, designed, aggressive, 272+, speeds, range, work, 268deg, ramp, effect, 2006, prices, engine, post, questions, regular, 6.25, current, original, idea, fact, turned, replacement, shims, shooting, conclusion, limits, testing, 1/3mz, http://www.sea2skytuning.com/images/logo2.jpg, 5vz-fe, 40-50lb

http://www.sea2skytuning.com/images/logo2.jpg After testing the limits of both valve springs we came to the conclusion that for the 5vz-fe the stock springs are too soft and they should not be operating in a high rev or high boost environment. With only a 40-50lb spring pressure you will risk shooting shims out or hit valve float even with stock redline but under pressure. The 1mz was an original idea for 5vz replacement springs but that was turned down due to the fact they are between