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Project Toyota Mr6 Head Cams Out

Head-Cams Out<br/>The 1MZ-FE uses a four-cam, shim-over-bucket system to actuate the valves. This is a highly efficient system capable of very high rpm with high stability, but the large shims are relatively heavy, and boosted 1MZs with extended rpm requirements definitely need stronger springs. For really high-rpm operation, outfits like GTP in Houston can convert to a light-weight shim-under system.
Project MR6

 Head-Cams Out
The 1MZ-FE uses a four-cam, shim-over-bucket system to actuate the valves. This is a highly efficient system capable of very high rpm with high stability, but the large shims are relatively heavy, and boosted 1MZs with extended rpm requirements definitely need stronger springs. For really high-rpm operation, outfits like GTP in Houston can convert to a light-weight shim-under system.  View Related Article

 

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