Xero Limit NC MX5 MZR/Duratec Custom Cams
Custom Cams for the 2.0/2.3/2.5 VVT MZR/Duratec. Note: Stage 1.5 out of stock currently, you can pre-order for the next batch ETA is of April 2020. Stage IV sets are in stock!
What do you get when you take years of specialization in the MZR/Duratec motor? A set of cams that delivers. These will increase the mid-range and top end on 2.0 motors, but will particularly shine on the 2.3/2.5 swaps. Coupled with a larger diameter header or larger intake manifold, they will keep making power even higher up the redline. These are for 6 tooth reluctor motors. That covers some of the VVT 2.3, all of the VVT 2.0, and all 2.5's. You can use stock valve springs with the stage 1.5, but we recommend stiffer valve springs for prolonged high RPM application.
For 95% of people we recommend the stage 1.5 cams. Called stage 1.5 (versus stage 1) due to the increased lift/duration over typical stage 1 cams, but with enough left in reserve so you can use them with the factory valve springs. Other vendors have copied this in rebranding other cams, but this is the ORIGINAL Stage 1.5 cam available for the MX5, as featured on the Goodwin Racing Project 2.5 both NA and Turbo!
For 5% of people who have the rods/rod bolts strong enough to go past 8000 on a 2.0l or 7500 on a 2.5l, the stage IV cams are for you. These will hold their own versus much more expensive cams, and will allow over 200 WHP on a built 2.0l, and 230+ on a built 2.5.
These cams are RACE PROVEN. We used them on our shop car, with many customers using them on race and street cars throughout the world including endurance racing. These cams utilize factory blanks, reground for our profile and then re-hardened. We have over a hundred in circulation with zero failures. We do not weld on the cam for maximum reliability. Lash caps are provided that take into account the cam upgrade, but you may need swap some shims or buckets to get optimal clearance as each motor wears differently.