*Exclusive* Inside the 4-rotor Mazda Rx7 Gt-700 racecar. Behind the scenes of Defined Autoworks

[@Skyrexx7]

Thanks so much for the video. I'm looking forward to the second half. Your car sounds exactly like 787B.

[@GTORx7]

Glad you enjoyed this one, there will be at least three more!

[@rars0n]

This car gets sicker every time I see it. I remember when you began to post about your plans to go with an NA 20B engine. I loved the idea, but never imagined you would have ran with it the way you did! I loved seeing the development of that engine and watching you get more and more power out of it. It's amazing what you've accomplished, but even more amazing that no matter what you continue making the car better and better. I'm absolutely blown away. Thanks for this video!

[@connoisseuroftigolbitts]

The extra coolant external feeds is really cool

[@danunk]

Keep going! I appreciate what your doing.

[@BJK1715]

This is one of those vids that I hit 'Like' before I even watch it.

[@GTORx7]

I won't complain about that! Thanks!

[@lofipinky]

A truly outstanding piece of engineering

[@ImEasyAs]

Those "logs" that were made are just bloody genius. We have quite a few 4 rotors here in NZ, but I've never seen anyone combat oil/water Temps other than running more pressure and bigger coolers, those logs and hardlines have just blown my mind. Really interested in knowing how they enter the block and how it impacts existing flow/pressure.

[@affenjunge1615]

Really cool to see some seriously well done rotary racecar engineering. Wiggins everything is insane and awesome, I lost it when I saw the wiggins on the oil lines. Such a cool car, I hope to see more videos talking about design/engineering aspects.

[@GTORx7]

I appreciate that! Plenty more coming out weekly.

[@DoItYourDream]

great work and very effective. I like that it's not super nice looking weld and other but really made work well

[@anealsrikant9254]

thanks for the update on this car, very informative.

[@bradyk2600]

Glad to see you're posting more videos!

[@MKR2310]

Danke für den Upload. Mach weiter so. Gerne mehr von den Technischen Sachen und der Umsetzung von Verbesserungen.

[@AdryDoic]

simply very very impressive !! at this time 4me its my favourite rx7 . appreciate even the thing that this is not turbocharged ! superb clean and wonderful styled work !

[@adinlouw]

Thanks for sharing. I thoroughly enjoyed this. I see I have some catch up to do. I like the idea of slide throttles

[@soraaoixxthebluesky]

Crazy piece of engineering 🥺

[@GTORx7]

Thanks!

[@martijnvkk]

Just so awesome! Wanna see more

[@daveferranda9379]

Thats great insight to an awesome car. 1 question though... with all the extra precautions and engineering to safeguard cooling and oil etc why do you run a single belt to the alt and pump? ie, why not run a twin belt set up?

[@GTORx7]

Thanks! I would have preferred twin belt, but the pulley arrangement for the drysump drive just didn't allow it. Its proven to have no durability issues through the years, so I trust it.

[@H8er-Maker]

The aero lesson in the beginning was the exact reason why my Dad's 1986 Rx7 would get hot during top speed runs at El Mirage dry lake. In 1990 he set a speed record in Bonneville for 1.3 litre engines. 202.2 mph on 13B. I can appreciate the work & effort you obviously put forth. Nothing sounds like Rotary. I inherited my Dad's 72 Rx2, occasionally I'll open it up in my neighborhood to remind the Fast & Furious fanboys what time is..

[@GTORx7]

That is completely amazing. Was that with racing beat?

[@H8er-Maker]

@@GTORx7 I don't know what Racing Beat is. He was a privateer, no sponsorship. It was a normal aspiration 13b, record stood for 9yrs. I still have the time ticket, shows how fast he was going at each mile marker up to the 8th & final mile. Now days you can buy cars right off the showroom that can do over 200mph in a mile.

[@GTORx7]

@@H8er-Maker for a naturally aspirated 13b to do that is very impressive!

[@H8er-Maker]

@@GTORx7 Your creation beyond impressive. Best of luck with race season.

[@jim1075]

You're going to have a LOT of subs in a short amount of time! Great vid.

[@GTORx7]

I hope so! Thank you.

[@trumanhw]

Super smart, logical, well thought out ..*EFFICIENT* ... and even beautiful looking & SOUNDING. And: It's simple. Which could sound like like I didn't appreciate what went in to it. Nope ... in fact -- there's nothing more difficult in this world ... than *creating* simplicity. *I'd like more info on the:* • Blade sway bars that're _adjustable during a race_ ...? • Brake bias that's adjustable ... _FROM the brake pedal_ ...?

[@GTORx7]

Thank you very much! Yes the sway bars have cables that run to the blade and then inside the cabin with levers for front and rear. The brake pedal has a adjuster with a cable running to a hand dial. The adjuster moves the pedal force more to one master clyinder vs the other.

[@trumanhw]

@@GTORx7 GENIUS. The German in me regards "Efficient" as _the highest compliment I know._

[@johnnykthe1]

Awesome. Thxs for sharing.

[@kevinconan9550]

Can a 4 rotor be use in city driving like if there is sudden traffic? Won't it get overheat?

[@mvanleeuwen8813]

I like your videos logan. Tnx for making them

[@connoisseuroftigolbitts]

This is sick bro 🤘

[@MegaDragge]

Do you use much 2 stroke oil for the rotor to last??

[@GTORx7]

1oz per gallon. Nothing crazy

[@joaovitorsilvagohl682]

i dont know why but i realy want a dk hot version with this car.

[@general_pinochet]

Awesome

[@corrieshepard9620]

Wow......a man talkin about his own curves. Slow down sailor. Nah lol....I work right down the street from Jack Cecil at horsepower logic. I soooooo wish I would have seen this maddening beast when it was there. Def my favorite R diddely ex seven in the world....so nasty and turned up to 13. But everything for a reason and I all has a function. Lubbit. Keep up the good work fellas! 🤙🇺🇸😊💯

[@willnzsurf]

Rob Dahm brought me here.🔻🔺🔻🔺 Hi from New Zealand.

[@epistte]

I wish that this motor would fit in the SCCA Star formula Mazda that I raced. I doubt that we could get the tech inspection geeks to sign off on it.....

[@wongfei]

EPIC VIDEO! i wonder how many lives will be wasted getting this information on junky forums like rx club..

[@GTORx7]

I'm happy you enjoyed it!

[@FukU2222]

Hey now, Logan has posted a lot of THIS information (w/ more detail & documentation) along with info from other vids/projects on said forums.... lol

[@nice1149ss]

Does every race car require this amount of R&D? It is clear that a lot of afford and skil that went on optimizing that car.

[@GTORx7]

Depends on a few things, but the faster of a class it races in, then definitely needs more r&d. Closer it is to stock you can rely on the factory engineering.

[@nice1149ss]

@@GTORx7 thanks for your response. do you have any recommendations to how someone on his mid-twenties can develop himself to become a hobby race car driver? I have some experience on auto-x, drifting, and karting but never been to a track day and currently don't even have a sport car.

[@GTORx7]

@@nice1149ss it's a great time to be alive, today's technology is very advanced. Investing in a decent driving simulator rig and running i-racing is what I recommend. It's insanely realistic and you will actually learn real race tracks. Dollar to experience ratio can't be beat, and then you can set funds aside and buy a affordable fun weekend warrior car. You'll feel right at home instantly!

[@nice1149ss]

@@GTORx7 thanks for the advice. I have a cheap racing rig and trying my best to improve my driving skills. I am also a mechanical engineer and trying to practice CAD, CFD and FEM so I have some tools to support any car modification