The EZ30 / EZ36 H6 Powered 86 / BRZ [ZN6] Guide PART TWO by Chase Bays

Assuming you're sure you've read Part One HERE ... this begins the next phase of the Chase Bays EZ30 / EZ36 development. ON TRACK use, endurance, TURBO, and perfecting the H6 sound. The goal is by mid 2027 we're surviving a 14 hour endurance race and we have a 450hp Turbo EZ30 Drift ZN6 to REALLY prove the platform.

Where we left off was our 270hp / 270tq dyno and first track test at SELECT DRIVING CLUB PoleCat PTC5 event. We pushed and pushed the car, worked out some tuning bugs, then slowly led up to doing a flyer 10/10ths lap. As expected we did run into some oil pressure drop issues on the longer sweepers, we knew going in this would be an issue. The FA/EJ famously allows oil up the engine without an oil pan baffle. Same as V8 engines...any engine really but especially H and V.

ZN6's have a ton of grip around corners and now that it's making 30 to 100hp more and 75 to 100 ft-lbs more torque this issue compounds higher. This car is FAST. Worry not, well designed oil pan baffles work. We can fix it. It's our job to find the issues and solve them!

For improved aesthetic and power (hopefully) we really wanted to get our 3D Printed Forward Facing Intake Manifold since our full tuning for swap kits was done on the stock rear facing type. Upon removal we saw how well just one track day the ethanol and Chase Bays Oil Catch Can allowed the intake ports to be cleaned out!

The dyno has SPOKEN and we made 276hp / 271tq =O With bigger runners and plenum we expected some lower-mid-range loss and from 3500 to 4200 we got exactly that. We feel that stock internals if we're making the same hp/tq give or take a few on this forward facing intake, that's a win. We didn't expect to gain anything but we're happy we did. Adding Cams N/A or Turbo we'd see more significant gains. Engine's are sometime's just maximized air wise, it's got all it needs in and out...it's making everything it's capable of.

Something else to note that the dyno doesn't show is the drop off on the stock manifold. At 6,500 it starts to drop off pretty bad, whereas with our forward facing it levels off at 6,800. We'll slowly push the engine to hopefully 7200. Either way we're excited to put cams in and we think it will make 315+ hp.

Now just enjoy some glamour shots of the engine bay in best form accompanied by the lovely Chase Bays catalog:

Side note our new Dual Pass Oil Cooler with TWO 342cfm Fans cools to insane levels. Never gets over 212º F. We've got you guys set up RIGHT when it comes to water/coolant and oil cooling.

Our final SELECT DRIVING CLUB event of the year is at NCM Motorsports Park in Bowling Green, KY. We're excited since it has some 100mph sweepers that we can put a prototype Oil Pan Baffle to the test! More on that soon...