Expert insights on (probably) the most impressive 4 Rotor AWD RX7 EVER.

🚙 Building a fast car? Get $400 OFF the all-inclusive VIP online course package deal: https://hpcdmy.co/offery197 🦵Kickstart your EFI Tuning knowledge. Get 50% OFF your first online course: https://hpcdmy.co/offery197 4 Rotor AWD FD RX7 | ‪@RobDahm‬ 1240HP+ Quad Rotor Build #techtalk This is a big one full of tech and some interesting A-B part testing insights. Running an R32 GTR transfer box off the back of a Holinger RD6, ‪@wintersperformanceproducts‬ Quick Change rear differential, ‪@haltech‬ R5 NEXUS ECU/PDM, ‪@GarrettTurbos‬ 94mm OR 106mm turbo, Clearview oil filtration system along with Ti Automotive a dual brushless pump setup among a long list of other parts, we caught up with Rob Dahm at ‪@semashow‬ to discuss his ever-evolving and now essentially complete FD RX7 quad rotor build. The Haltech R5 doesn't just handle engine management; the built-in PDM also controls many of the electrical components leaving the car without fuses or relays. A standalone ‪@ECUMasterUSA‬ PMU splits this duty in 2 adding redundancy plus more inputs and outputs. A ‪@FuelTechUSA‬ FTSpark Capacitive Discharge Ignition (CDI) also helps in the ignition department. Interestingly this build draws up to 80amps, and as you can see (and hear) Rob has made sure that isn't an issue with this setup. Traction control is also handled by the Haltech R5 via a Nissan ATTESA-based control system and some 'fettling' by Rob which allows him to demand a dynamic or set torque ratio between the front and rear of the car allowing for versatility when launching and cornering across many surface conditions. We also touch on some Nikasil-style coating that is used to make sure aluminium and steel alloys play together nicely. Interestingly the engine is clearanced specifically for ‪@valvoline‬ 20-50 oil which shows the level of detail this build has reached. The long list of topics continues with Precision Engineering eccentric shafts, rotary irons, apex seals, 16 point total TPMS (tyre pressure monitoring system) and the gremlins auxiliary systems can cause a rotary engine. Last time we spoke to Rob he mentioned his interest in more A-B testing, and he has followed through on this and discussed some poor injector placement and cooling issues that upon investigation and data collection he has resolved often by taking it upon himself to learn the skills to do the job himself. Machine work, wiring and tuning are just a few skills he has picked up as a direct result of this build. ------------------------------------ TIME STAMPS: 0:00 - FD RX7 AWD Tube Frame 4 Rotor 0:24 - Even More Hands On Since Last Chat 1:38 - Style Props 1:48 - Put Your Mind To It, Dive In 2:01 - Theory Vs Reality: Intercooler Example 3:15 - Injector Data & Placement (For 16 Injectors) 3:58 - 4 Rotor Engine Development 5:05 - Machining Demands 6:29 - Billet Rotary Irons 7:42 - Clarification on Coatings & Metal Combinations 8:16 - X-Raying For Metal Composition & Data 8:59 - Cooling - Cast Vs Aluminium Testing 10:20 - No OEM 4 Rotor Parts 10:37 - Eccentric Shaft Support & Improvements 12:20 - 8,000rpm and 1240hp, Things Bend/Flex 12:46 - Rotary Reliability Testing: Ridigity 13:38 - 39psi Vs Ken Block Dowel Example 14:40 - Torsional Forces At Launch 15:04 - Porting: 4 Rotor Setup 16:06 - Peripheral & Semi-Peripheral Port Explanation 16:50 - Apex Seals Vs Porting 17:42 - Apex Seal Purpose & Options 18:38 - Apex Seal Scanning & Heat Treating 19:40 - Best Apex Seal.....For What? 20:40 - Stock Seals & More Torque Than An LS V8 21:38 - Electronics: Haltech R5 Nexus 23:12 - R32 GTR ATTESA Based Traction Control System 24:00 - Torque Split Explanation 24:20 - Launching Strategy 25:41 - Haltech R5 Thoughts and Logging 27:26 - PDM - Power Distribution Module 28:16 - Ignition System 28:53 - Spreading Electrical Load 29:34 - Rotary Problems Come From Auxiliary Problems 30:10 - Rotary Engine Reputation 30:59 - Thanks Rob 31:32 - Do What Rob Did And Work On Your Own Project, Big Or Small, It Doesn't Matter ------------------------------------ FREE LESSONS: 🏎 Want to learn how to EFI an aftermarket ECU like a MoTeC, Haltech, Link, AEM, Syvecs, EMtrom, Maxx, Ecumaster, MegaSquirt, Arduino, MicroSquirt, Holley, FuelTech, ME or something else completely different? Start with some free lessons right here: https://hpcdmy.co/EFI101y ⚠️ Want to learn more about motorsport wiring? Claim your spot to the next FREE lesson: https://hpcdmy.co/wiringlessonyt ------------------------------------ LINKS: Website and Courses: https://hpcdmy.co/hpa Podcast: https://hpcdmy.co/podcast Merch (HPA tees & hoodies): https://hpcdmy.co/merchy ------------------------------------ TAGS: #highperformanceacademy #robdahm #4rotor #quadrotor #fdrx7 #rx7 #semashow #apexseal #rotary #wankel #rotor #learntotune #enginebuilding101 #dontletthesmokeout #wiring101 #dieseltuning #datanerd #gofasterwithdata #racecraft #learndriveoptimise #motorsport