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Mazdaspeed 3 Blows Engine On The Dyno After Making 400 WHP

Unfortunately we blew the stock engine in the Mazdaspeed 3 on the dyno. All the tuning was done by me, and many would agree that it was not overly aggressive. It's hard to say what caused the failure at this point, but we noticed knock retard values above 5 degrees in the data log right before it let go. This didn't really make sense as we were running 94 octane pump gas mixed with 3 gallons of in tank methanol. The next possibility in our minds, is that using the WOT box as a rev limiter while making this much power and generating this much heat with back to back runs, might have stressed the engines stock internals to a point of no return. We already know that the OEM pistons and connecting rods are the weak points of this engine. At this point we've sourced another used CX7 long block and are going get it built with forged connecting rods, pistons, upgraded bearings, and possibly some head work. Enjoy the video! Please like, share, and subscribe :) Instagram - @wannabe_tuners Mods in this video: 1. DM PCV Plate w/ Dual Vented Cans 2. Cobb Accessport V3 (self tuned) 3. Aeromotive 325 LPH Fuel Pump 4. Bfg G-force Comp 2 All Seasons 5. Stratified Guardian Angel V3 6. Full Race Exhaust Manifold 7. Ngk One Step Colder Plugs 8. 6th Port Aux Fuel Injection 9. Corksport Intake Manifold 10. Jbr 88a Rear Motor Mount 11. Jbr 88a Trans Motor Mount 12. Jbr 80a Pass Motor Mount 13. Custom Radiator Ducting 14. Autotech HPFP Internals 15. Eibach Lowering Springs 16. Corksport Injector Seals 17. Jbr Egr Block Off Plate 18. Cpe Catless Downpipe 19. Cfm Oil Breather Cap 20. Jbr Raider's Air Damn 21. MST Suzuka Wheels 22. Koni Yellow Shocks 23. Gen 2 Valve Cover 24. CS 3.5 Inch Intake 25. Cobb 3 Port Ebcs 26. Fidanza Flywheel 27. Bnr S4 V3 Turbo 28. Jbr Under Route 29. Cobb Xle Bpv 30. AEM Gauges 31. Cnt Catback 32. Tr8 Fmic 33. Wot Box