How to Build a Big Power, Reliable Rotary Engine (with Rob Dahm)!

We're back at Rob Dahm's shop again but this time we're picking his brain on how to build a rotary engine that can not only make big power, but do so reliably!

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[FFalin]

I dont even have a car w/ a rotary but im still gonna watch this vid as if im gonna be tested over this info

[tokirak]

After so many years, Rob finally reveals his apex seals of choice.

[burtonjim]

Holy shit. I've never seen anyone but Rob match your absolute nerd energy about the specifics of motors! This is fucking awesome!

[pastaalalamborghini]

29:08 - you know Rob has this clipped and plays it when he wakes up in the morning for inspiration. Imagine getting to a point in your nerd hobby where youre not only making a living from it but realize youre a peer of an engine master and have valuable insight to share

[martynclinton]

So good to watch rob become a engineer - through trial error failure adaption and LISTENING but not believing other engineers!

A clear minded thinker!

[jakedougherty]

I've been lusting for a FD RX7 for such a long time, now suddenly a bunch of random coincidences make it pop up in normal conversations and day to day, and now THIS video. I think the universe is telling me to go for it 😅

[dingus]

Man, I feel so lucky having watched Rob go from someone who was kinda laughed at for having unreliable 0PSI cars to the absolute mad scientist he is today. Such a glow up!

[spazzologist]

Rob dahm nerdery for an hour is the best thing on YouTube. Watching him pack a rotor is so satisfying ! Please build one.

[darrylcavanaugh]

These 2 are so great together- Humble, SO willing to share their knowledge, and are in it for US. I’m going to their stores, and will proudly wear their merch. Its the least I can do. So much great info shared. My first car was a 73 Rx2, and I put a street ported 12A into it (Side draft DeLorto, Header, 1st gen electronic ign, etc), with a gen 1 Rx7 5 sped, and a GSL limited slip (direct bolt in for the Rx2), and CRUSHED 5.0 Mustangs and Camaro’s of the day, stop light to stop light. You would not believe how many guys pulled up next to me, PISSED, asking ‘what is in that thing?’, and my reply was always ‘1.2 liter’s of fury.’ Not to be obvious, but I wish I had that car today…. SO fun. Today, I could afford to have Rob build me a monster, but, if that car had 300hp, you’d struggle to drive it. More collaborations, between these channel’s, PLEASE.

[seabid]

I've been following robs rotary journey for some time now. We need guys like these two teaching automotive classes in high school man. They're so knowledgeable

[robertgonzalez]

Back in 1989 are used to jump on the school bus to high school and then walk into town to work on cars and rotary engines was the main feature builds that I was doing so watching Rob talk about his findings is like opening a treasure chest amazing information and the young people today have such a wealth of knowledge at their fingertips to where we were trying to reach 11 second cars now 9 or 8 Second cars are so obtainable what a jump thank you for sharing God bless

[majmarkmiranda]

I just love the guy who started a channel knowing absolutely nothing about cars has not only become one of the great wealths of knowledge for the dorito that we all agree that he is the guy to speak to

[mtech]

I think Rob is the man for rotaries and he is humble and not scared to share his adventures and tweaks he has found over the years.

[rotaryperfection]

I 100% agree with Rob on the 90psi numbers. That's what I've always gotten with a piston engine tester on ALL my basic rotary rebuilds at 2, 700ft above sea level.

[timh]

Rob Dahm has a wealth of knowledge of Rotaries. He is Awesome at explaining his knowledge!! Tim Australia.

[HoopstickPerformance]

Two of my favorite techie nerdie car guys! Love that they are at Rob's shop as well where it is nothing but a dorito bakery

[Notday-Satan]

Very insightful. I'm impressed by how well Rob knows the subject of rotary engines. The fact that a good engine is planned and measured meticulously remains true. Winners are made at an experienced reputable machine shop. The dorito is a mystical beast.

[sasukekiller]

Perfect timing, I’m tearing apart a 13b I just got for my FD. Thank you for all the helpful info.

[LordCakeskull]

The information about port overlap and fuel timing causing confusion for tuners and leading to conservative rich tunes ia great to hear.
There's also a similar effect caused by the trailing spark plug holes leaking compression when the exhaust port timing is eary enough to coincide with the apex seal passing the plug.

[Dewree]

I just love how quick Rob locks in after every laugh 😂🗿