Everything You Need to Know about Mazda Rotors - FD-REW, FC, Old School, 12a, 13b- How To Identify
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- Опубліковано 1 вер 2021
- Every Popular mazda rotor's specs, Weight, compression, seal size, etc.
Mazdatrix specs
mazdatrix.com/rotor-weight-an...
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/ radpotential - Авто та транспорт
Thank you for making this!
Your channel is a gold mine
Thanks for all you do. Love learning the ins and outs of these amazing motors. I have a FD and my next project is taking it apart and rebuilding it for 450 ish HP but make it reliable and fun on the streets.
You're very welcome!! that would be a super fun setup! that black FD I built awhile back would be in that HP range. The half bridge isn't needed for that HP number though. you can just up the boost a bit and make the same number with a stock/street port
Love all your rotary videos on FB
That's just the video I needed ,Thanks love your content
Excellent video, as always!
Hey man! Joined your Patreon a few days ago and asked a question over there that I think you missed. Love the content they help me out immensely!
I got you! I have been researching that topic so I can get you a video with the correct information.
Very good information
My 85 had the 1.1 with the 4 barrel carb and with the racing beat header kit I welded together for it and a crank power pulley it seemed pretty fast despite being just over a hundred horse power the main thing I loved about it was it loved highway cruising I've held it over 120 mph for over an hour on many occasions and once had it up to 145 before I lost my courage to go any faster, the smoothness at high rpms and ability to sustain high rpms was my favorite thing about the motor, still have the chassi but don't know what way im going with the next engine.
Thanks for putting out education for this newbie. This means I have an odd duck 12A in my collection of derelicts. By the VINs I got an 81, two 82s and a 1983. The 83 became an un-car yesterday when I cut its VIN out. Hopefully I finish cutting it in half today for delivery up North early next week.
great video thanks
I enjoy your channel, what I haven't seen much of is restomoding fb's with na renesis engine and gearbox, good for 240 hp, no mods. I think that hp in that body would be about right. Plus that 9000 rpm redline! I'd love to see you put one of those together. Another thing I'm certain that one of our big engine builders down here in Oz recommends using fd RX7 rotors in an renesis rebuild.?
Wow thanks for the great response to my query on rotors! I have a half dozen rotors but not sure which they are Turbo or NA. You showed the difference with a magnetic level and your finger but I was wondering if I could get a slightly more standard dimension depth (ruler) of the pocket so I can tell if it is a turbo or NA since they weigh the same. Thanks! (your newest Patreon member) or maybe overlay the text on the video of the depth :) btw, I think a saw a video that showed a 'T' cast in the rotor near the bearing, but I don't know what years Mazda did that.
Basically if you can confirm that they are both S4 or S5 etc based on the visual casting differences and weight. Then you just need to verify that one rotor is deeper than the other to confirm if it's t2 or NA the actual number isn't important. T2 will be a deeper cavity, NA shallower. As measured like I showed in the video
Thanks for this video! So how do you find so many RX7’s and rotary vehicles? I have been looking for a while for a decent FB and can’t find one… I’m in Massachusetts… How do you find engines? Same thing I have been looking and nothing is to be found on facebook or anywhere else I look… I have a 73 Datsun 620 I would love to swap a rotary in.
Good stuff, can you do a video about compression testing? I've been trying to sell a rotary vehicle, and the amount of bad info on the internet and forums is astounding, it would be great to have a comprehensive guide to show people. People think you should get 120+ PSI or the engine is about to "pop" while doing the bump test without the schrader valve installed.
I have a video compression testing my rx8 that shows the process are you just wanting numbers?
What do you think about using stock height rx8 apex seals with rew housings?
You mentioned the 10A which came in the R100 here in the US. The rotors in it are identical to 1971 to 1976? 12A rotors except for the width. They used two side seals for each side of each face giving a total of 12 side seals for each rotor and 5mm thick carbon aluminum alloy apex seals.
Question. What are these round inserts used in the groove just outside the oil control rings?
Valve ( port timing) and turbos a large number of turbo and supercharged engines have negative valve overlap. The exhaust closes before the intake opens. What is the valve overlap on stock rotaries and is the turbo version different
🤘🏻 🌟 🤘
Pretty sure the twin dizzy rotors are directional, and 6mm carbon apex seals, also they are pre 1974. Cheers
Can you do a video about "high horsepower".
At what HP / RPM does eshaft flex start causing problems?
Yea! It's on the list once I get my truck and the turbo combined
Very useful video, thank you! Are the thicker sideseals for oldschool 13b rotors still easy accessible? Can the oldschool rotors be lightened and used in FD 13b motors?
Yes and yes!
@@RADPotential Thank you so much for the answer!
@@RADPotential By the way, I have a pair of new 9.4:1 fb3 rotors for sale. Let me know, if you are interested.
Thank you
Is there any reason why an rx8 would have issues running the stock side ports in tandem with a peripheral port for the exhaust? Perhaps with Cosmo spec intake ports?
You can do that. Kyle Mohan is working on a hybrid RX8 engine now. I am excited to see the results!
Thank you so much for answering back to me I did what you told me to put the negative wire on the longer bolt of the starter and it turn thank thank you so much i met a guy he has for sale all tipe of rotary rx100 rx2 rx3 rx4 you name it he has it if you have any car for sale he buys them if you interested let me know.
@rad potential, can I swap a s4 NA with a S4 Turbo II rotors? Is the weigh any different?
Yea. Totally different
@@RADPotential What about swaping a s5 NA for S5 T2?
They would share the same balance, S5 NA will be higher compression. IE you can use an S5 T2 flywheel on S5 NA rotors and vice versa
Hi, I have a 91 Rx7 6 port 13b turned into a 4 port and it’s leaking oil into the housing. How do I know if he ported it into the oil control area?
???
Is there a solid way to test compression of an engine out of the car? Without hooking up some custom mounting bracket with your starter? I'm doing a rebuild soon and would like to know my engine is running ready before putting back in the car for the second time lol.
Yea. Just put your transmission on it out of the car to mount the starter and use a compression tester.
@@RADPotential That's a good idea, thanks man.
What's the most power you can squeeze out of an NA series 4/5 setup?
Depends, if I were you I'd PP it. Won't make crazy power but your powerband will be snappy and balance/rotor lightening and you can rev it to the moon.
NA-6 port irons I have seen people make 250whp with big ports and lots of rpm, but that engine isn't going to be home under 4k.
How high do you think the average rotary could rev to? What would break first?
I think most people would run out of ignition vs exceed the balance limitations of the engine. I rev a stock balance late model full bridge 12a past 9k, boosted I think most people stay around 8-8500 on the street. Plus you will need a trans that can shift at that high of an rpm. Things to think about. I dont have a definite answer
I always thought the rx8 rotors were 10.1 cr? Is it a tomayto tomarto scenario with 0 and 1? And im being silly😂 you should do a renesis rotor seal how to clearance vid and also is the renni apex shallow because the side seals take the beating?
my chart shows 10.0. Now if there is enough carbon build up on there, you may be at 10.1 :) Really not sure on the Reasoning behind the apex seal depth and the tapered side seals on the renny.
@@RADPotential i just looked at mazdatrix and seen the same as you stated 👍 and if that was a carbon joke because its a renesis....well played🤣 either way cheers👍
haha for sure just a renesis carbon joke. they are usually a mess. at least the ones I have torn down. Thanks!!
Does he have a phone number or a email