The RX-7 confirmed to be in the pipeline for 2017---RX-Vision Unveil!!
02-12-15, 05:50 PM
#2501
Quote:
Originally Posted by gmonsen View Post
Trey... We were never able to control the primary and secondary intakes you and I discussed. The tolerances on the port throttle butterflies when closed allowed too much air/fuel to go through, so there was like $2,500+ wasted. I know you have something that might be up and running. Could and should Mazda be looking at this?
G
Gordon, did Logan put the butterflys upstream from the secondary injectors? They only need to be closed enough to allow most of the flow to enter through the primary runners. I hand fabricated my primary and secondary butterfly system and will be driving my car the 700 miles round trip to Elpaso next weekend for my emissions test. I was suppose to be going this weekend but, due to the nature of my job being in the oil field, we just layed off 50% of staff across the board. I survived but my weekends off have changed. Hopefully I will have some positive results.
I really think for a small p-port, semi p-port system the p-port should be used as the primary port.
P-ports make more power across the board, so it will have more low rpm torque.
Flowing air through the P-port at idle will provide some intake velocity to fight the reversion from compression stroke that the p-port will allow even with a closed throttle body (across the apex seal as it spans the p-port).
Additionally, late closing sideports CAN and have been closed off at low rpm (by Mazda) as the 2 un-compromised sideseals still form a sealing grid at the rotor flank to stop the compression reversion.
So, to recap.
Primary P-peripheral port with injector
Secondary (stock primary) side port
Tertiary (stock secondary) side port
Quaternary (stock aux) side ports *2 rotor option*
Originally Posted by gmonsen View Post
Trey... We were never able to control the primary and secondary intakes you and I discussed. The tolerances on the port throttle butterflies when closed allowed too much air/fuel to go through, so there was like $2,500+ wasted. I know you have something that might be up and running. Could and should Mazda be looking at this?
G
Gordon, did Logan put the butterflys upstream from the secondary injectors? They only need to be closed enough to allow most of the flow to enter through the primary runners. I hand fabricated my primary and secondary butterfly system and will be driving my car the 700 miles round trip to Elpaso next weekend for my emissions test. I was suppose to be going this weekend but, due to the nature of my job being in the oil field, we just layed off 50% of staff across the board. I survived but my weekends off have changed. Hopefully I will have some positive results.
I really think for a small p-port, semi p-port system the p-port should be used as the primary port.
P-ports make more power across the board, so it will have more low rpm torque.
Flowing air through the P-port at idle will provide some intake velocity to fight the reversion from compression stroke that the p-port will allow even with a closed throttle body (across the apex seal as it spans the p-port).
Additionally, late closing sideports CAN and have been closed off at low rpm (by Mazda) as the 2 un-compromised sideseals still form a sealing grid at the rotor flank to stop the compression reversion.
So, to recap.
Primary P-peripheral port with injector
Secondary (stock primary) side port
Tertiary (stock secondary) side port
Quaternary (stock aux) side ports *2 rotor option*
I remember reading of this concept years ago but dismissed it. DI makes that all possible now.Your giving me alot to think about.
02-12-15, 06:02 PM
#2502
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its too bad you're in Texas, i could show you my p port. even with a carb, and locked timing its tame. with EFI it wouldn't run any different than a stock FC, and with DI, you wouldn't know its there
02-12-15, 06:23 PM
#2503
It would be nice to check out a carbed PP. I haven't driven mine much in PP mode yet since I was having ignition problems and a TPS that was falling out of calibration. It idles around 1,700rpms. Those problems have been fixed recently. I just now resealed my oil pan. Hopefully it stops leaking and can now do some playfull things. I've just had to be to carefull lately with all these nagging issues.
02-12-15, 06:50 PM
#2504
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It would be nice to check out a carbed PP. I haven't driven mine much in PP mode yet since I was having ignition problems and a TPS that was falling out of calibration. It idles around 1,700rpms. Those problems have been fixed recently. I just now resealed my oil pan. Hopefully it stops leaking and can now do some playfull things. I've just had to be to carefull lately with all these nagging issues.
the P port's a happy little guy though, fires right up, hot or cold, idles @900, i can even get it to idle without the brap brap too, although the brap brap is one of the perks!
02-13-15, 05:54 PM
#2505
my friend parted out a 95 miata, and as soon as the engine was out of the car, i grabbed an FC center iron, oil pan and engine mounts, and the results were disappointing. i think a 13B miata, might be harder than the 20B FD.
the easy 13B miata swap is the NC, as they share so many parts, i think the MSP is a bolt in. wiring is the adventure there
I forgot to post a pic on this. Did you go to Sevenstock 2013? Renesis is 1st gen Miata. I see a ton of room! I bet this is fun as hell to drive around.
The front of this car dropped some weight with the rotary so maybe it's 2100lbs now with 230 hp. 
02-25-15, 01:23 PM
#2512
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got this email from a friend of mine, who happens to own an extremely nice FD himself
"3 days ago, 6 out of 10 of the fastest times at the Tsukuba Time Attack were posted by RX7’s, with an RX7 posting the fastest time of the day.
Defining JDM: Battle Evome Tsukuba Attack - Speedhunters
The featured Marque at Goodwood Festival of Speed in England this year is Mazda.
This follows Mad Mikes performance last year:
https://grrc.goodwood.com/festival-o...-line-fos-2015
… all from a 23 year old discontinued car."
"3 days ago, 6 out of 10 of the fastest times at the Tsukuba Time Attack were posted by RX7’s, with an RX7 posting the fastest time of the day.
Defining JDM: Battle Evome Tsukuba Attack - Speedhunters
The featured Marque at Goodwood Festival of Speed in England this year is Mazda.
This follows Mad Mikes performance last year:
https://grrc.goodwood.com/festival-o...-line-fos-2015
… all from a 23 year old discontinued car."
02-25-15, 01:56 PM
#2513
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and the business case "Totally flabbergasting that they don’t get it, that they don’t make a new one. It doesn’t even matter if it makes them a penny in profit per car because the real money it earns is in free advertising.
It makes Mazda look cool in a way “Sky Active" NEVER EVER will.
Seeing Mad Mikes 4 rotor shrieking and spitting flames (upstaging formula one cars!) is remarkable, it’s like getting to see a real, live Dragon in person."
the clean diesel is nice, but notice they have been racing it for years and nobody cares?
It makes Mazda look cool in a way “Sky Active" NEVER EVER will.
Seeing Mad Mikes 4 rotor shrieking and spitting flames (upstaging formula one cars!) is remarkable, it’s like getting to see a real, live Dragon in person."
the clean diesel is nice, but notice they have been racing it for years and nobody cares?
02-25-15, 03:22 PM
#2515
Wonder why there wasn't any R35's though? Would love to see how the FD's do against a prepped R35 on Tsukuba these days.
Tsukuba is a handling course, I don't think they have found a way to get the 3,800lb understeering R35 GTR to get around it quickly yet.
I believe the R35 Tsukuba times are in the high 50s where FCs/FDs were 15yrs ago when I got into the Japanese car scene.
Now, the Fuji Speedway and its 1 mile straight is the stomping grounds of the tuned R35 GTRS. I believe they are in the high 1:30s there and FDs are in the mid 1:40s.
Maybe it is time for the new RX to dethrone the GTR on the Fuji Speedway like the RX-3s did to the GTR in the early '70s. But I don't see Mazda building that kind of car.
Tsukuba is a handling course, I don't think they have found a way to get the 3,800lb understeering R35 GTR to get around it quickly yet.
I believe the R35 Tsukuba times are in the high 50s where FCs/FDs were 15yrs ago when I got into the Japanese car scene.
Now, the Fuji Speedway and its 1 mile straight is the stomping grounds of the tuned R35 GTRS. I believe they are in the high 1:30s there and FDs are in the mid 1:40s.
Maybe it is time for the new RX to dethrone the GTR on the Fuji Speedway like the RX-3s did to the GTR in the early '70s. But I don't see Mazda building that kind of car.
03-17-15, 04:10 PM
#2516
I just got done watching this and have a huge amount of respect for the CEO of Nissan. He brought the company back from the brink of destruction to building the Gtr only 2 years after making a profit. All because the company needed something to take its brand to the next level.
Mazda!!!!! What are you gonna do about this?
03-20-15, 11:05 PM
#2517
OK, more gushing on the Alfa 4C since that is the target I would love Mazda to pursue with a hardtop rotary MX-5 based car.
It seems Alfa 4C makes its advertised power at the wheels on a dynojet.
Guess that is how the heavy 2,400lb Launch Edition does 12.8 @ 107mph with just 238hp.
As I predicted the the little turbo car already has an ECU upgrade available that boosts the turbo power.
That is in PS/NM so in HP/FtLbs it is 240hp, 262ftlbs stock and 291hp, 323ftlbs with Stage 1 tune.
It seems Alfa 4C makes its advertised power at the wheels on a dynojet.
Guess that is how the heavy 2,400lb Launch Edition does 12.8 @ 107mph with just 238hp.
As I predicted the the little turbo car already has an ECU upgrade available that boosts the turbo power.
That is in PS/NM so in HP/FtLbs it is 240hp, 262ftlbs stock and 291hp, 323ftlbs with Stage 1 tune.
03-21-15, 10:51 AM
#2518
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i saw this today, there is no date or author credit, so its probably crowd sourced by robots but New RX-7 to get 335kW turbo rotary ? Fullthrottle
03-21-15, 12:57 PM
#2519
I like the render! Also a revisd Rx8 platform is a great start as it blew the fd away in terms of rigidity while also being longer and having suicide doors. Rx7, being a two door coupe with a shorter wheel base will make chassis even more rigid. I just wish Mazda would at least start teasing engine pics and specs. You know the things they did to improve upon the rotary design. I want that eye candy.
Last edited by t-von; 03-21-15 at 01:01 PM.
03-21-15, 08:34 PM
#2520
i saw this today, there is no date or author credit, so its probably crowd sourced by robots but New RX-7 to get 335kW turbo rotary ? Fullthrottle
03-22-15, 06:02 AM
#2521
Full Member
...by some journalist
Unless such power figures come from a named Mazda source then it's all vaporware IMHO.
By the way, the use of the Rx-8 platform sounds very unlikely to me. It's already 12 years old; by 2017 it will be 14 years old and by 2020 it will be 17. It may be good from a performance point of view, but there's no way that it will meet the future crash test standards without some heavy reengineering. In that case, why not stretch the ND Mx-5 platform instead?
Andrea.
Unless such power figures come from a named Mazda source then it's all vaporware IMHO.
By the way, the use of the Rx-8 platform sounds very unlikely to me. It's already 12 years old; by 2017 it will be 14 years old and by 2020 it will be 17. It may be good from a performance point of view, but there's no way that it will meet the future crash test standards without some heavy reengineering. In that case, why not stretch the ND Mx-5 platform instead?
Andrea.
Last edited by fmzambon; 03-22-15 at 06:08 AM.
03-23-15, 02:07 AM
#2522
Oh go **** on your own cheerios will ya? ;-)
The article did state that the info came from a source close to mazda... Additionally, what exactly are these future crash test that the so called chassis won't meet? Got any specs on the chassis and the actual future tests? Unless you have both then you are just speculating to be negative (hence the cheerios comment)
Unless such power figures come from a named Mazda source then it's all vaporware IMHO.
By the way, the use of the Rx-8 platform sounds very unlikely to me. It's already 12 years old; by 2017 it will be 14 years old and by 2020 it will be 17. It may be good from a performance point of view, but there's no way that it will meet the future crash test standards without some heavy reengineering. In that case, why not stretch the ND Mx-5 platform instead?
Andrea.
By the way, the use of the Rx-8 platform sounds very unlikely to me. It's already 12 years old; by 2017 it will be 14 years old and by 2020 it will be 17. It may be good from a performance point of view, but there's no way that it will meet the future crash test standards without some heavy reengineering. In that case, why not stretch the ND Mx-5 platform instead?
Andrea.
03-23-15, 05:24 AM
#2523
Senior Member
Oh go **** on your own cheerios will ya? ;-) The article did state that the info came from a source close to mazda... Additionally, what exactly are these future crash test that the so called chassis won't meet? Got any specs on the chassis and the actual future tests? Unless you have both then you are just speculating to be negative (hence the cheerios comment)
03-23-15, 08:01 AM
#2524
Full Member
I am working in the automotive industry the RX8 chassis would not fail any tests , but it would score bad for instance in the US with the so called small overlap that was introduced in 2012 . However it would not require a complete new development of the chassis but only a few stiffness measures to pass this ( trust me I am quite familiar with this due to my work ) . However Remember these cars like the rx7 hardly make any financial sense to a company except you make them a proper super at and pay it with marketing budget as a halo car. As Mazda also has no partner anymore like ford to share the costs . Therefore you would want to use as many parts that you already have in production to save costs . Hence I believe the new mx5 (miata) platform makes the most sense . Just look at what bigger manufacturers with more money do BMW + Toyota , Subaru + Toyota .
Yes, meeting standards is one thing, but can a car company (any company) afford to sell a premium sports car that barely passes crash tests? It might be acceptable for some ultra low cost car, but not for a high end product. In this context scoring less than almost full marks can be considered a failure, hence my statement.
And the conclusion is the same as well: the Rx-8 platform would need some work to be used, so why not work on the much newer ND platform instead? There will also be a bonus of much more similar assembly line between the Rx-? and the ND (= lower production costs) and more shared parts (= again lower costs), as well as, likely, a lower final weight (compare the weight of the NC to the ND).
Andrea.
03-23-15, 09:47 AM
#2525
You know I love the idea of a 2,600lb 450 hp Rx7 but the reality is, a turbo charged front engine rear wheel drive car with that kinda of power to weight ratio (5.7lbs per hp) will always be traction limited and be a handfull for most everyone. I mean none of us have a clue as to how much more torque the new engine will make with its longer stroke and turbo charging. It could be V8 like in its delivery. Hell the Ls1 swap guys already have traction issues with that much torque because the car is so light in the *** end. You need a longer wheel base to help make things more stable at speed but unfortunately longer wheel base means heavier car. I'm not sure Mazda is that comfortable with putting something that extreme out in the market just yet unless they are really going after the Porche, Gtr, and Z06 type competition.
Last edited by t-von; 03-23-15 at 09:52 AM.