Another dumb question here... If Im buying the BHR midpipe to replace my cat do I need the catalyst?

 

You will have to determine what your state/county/city requires for emissions regulation, and then determine if you will ignore the law or follow it.


From a pure mechanical perspective, no the car does not need the catalyst, and including the catalyst is a loss in power and a decrease in reliability, since it can clog and lead to engine damage if you develop misfires.

 

Hello all, first time here, why can't I create a new topic? I can only reply to others.....

 

Check the "Announcement" at the top of the "New Members" section

 

New Member Forum - RX8Club.com

 

Dumb Question: Does the Racing Beat air duct throw a CEL?

 

hello, i have been looking everywhere and can't find the answer, or come even close to a solution.
Help please.
I went to my local shop that does all kind of stuff with electronics.
i asked him if he could install me an aftermarket touchscreen radio.
he said he could do it, and has done to the rx8 before.
i also asked if i will be able to keep my factory navigation system properly working. he said no that i would lose it totally. is this true, or is there a way of keeping the factory navy with aftermarket touchscreen radio?

 

Nope. It just shovels colder air to the factory air box. When you start messing with the section of the intake starting just before the MAF to the throttle body is when you have CEL concerns unless there is sufficient R+D to make sure it works solidly (Racing Beat, AEM)

 

stupid question but do 4 rims sizes 19"x8.5 and 19"x9.5 and 4 tires fit in our cars?

 

depends on offset . Check out the 'will it fit ' thread .

 

no i mean having them inside of our cars..will all fit inside including the tires

 

4 across the back seats, 1 in the trunk, 2 in the passenger front seat. The 4th is going to have to fit where-ever, and you might not get it, being 19s. I got 4 wheels and 4 tires in my 8, but they were 17s and it was really tight. you might have lots of trouble with 19s, might not be possible. If you can get 1 or 2 wheels into the tires, even at all, you will be able to do it.


Edit: My 17s were also 7" wide, which will make a difference. You might only be able to get 3 across the back seats, leaving you with 2 that don't fit.

 

LOL thought you worded that a bit funny but resisted the urge to be sarcastic because of thread title .

I think you could get them in no problem , 1 in boot and one in each passenger seat .

 

u mean the 4 rims in the back on top of each others? 2 tires in the passenger seat and two in the trunk? if not one then the other one goes in the back?

 

You will only get 1 in the trunk. It doesn't fill it, but there isn't enough room to fit a 2nd 17x7 rim without tire in there, so you won't get 2 19x8.5s in there, or 2 tires. Height is the problem.

I mean with the wheels oriented parallel to the wheels that are mounted on the car, face to face. Like the closest tire in this pic:


You can fit 4 225 width side by side for sure, possibly 4 245 width.


You are going to have problems fitting 1 or 2 of the 8 total objects.

 

ok y didnt u put the 4th rim on top of the other two in the passenger seat? there is still some room in the front and only one tire fits in the trunk?



lol my fault..should have rephrased the sentence

 

That isn't my pic.

I'm not sure how else to describe it. You can only count on getting 2 total in the front passenger seat, count on 3 MAYBE 4 across the back seats, 1 in the trunk. That is 6 or 7 of the 8 total pieces.

The 8 holds more than people expect, but 8 pieces that big are probably too much.

 

damn..then im totally screwed..and i thought our trunks were big enough that you could fit 2 bodies in there

the tires are 235/35 and 265/30

 

Hi, I was of the understanding that the RX8 had a Wankel engine fitted that meant they do not have pistons but a 3 sided rota that obviously rotates within engine & the tips (4tips) on the end of the rota caused the sparks within the engine.
You also have two of these engines fitted within the engine bay.
Normally 2 x1300cc engines equating to a 2.6 engine
Correct me if I'm wrong.

 

There are 3 tips (apex seals). There are 2 spark plugs per rotor, 1 leading & 1 trailing.
There are 2 rotors that make up one engine. You don't say that a V8 is 8 different engines. Each rotor is approximately 650cc. The 2.6 figure, you quote, is the engine equates to a 2.6L piston engine.
Since a picture is worth a thousand words,

 

I've fit 8 17x9 255/40/17s in my car pretty easily, so don't lose help yet. My little brother's a drifter so I haul rims and tires more often than I probably should. Height might be an issue this way though, but I put them standing up running parallel to the back of the seats. You'll have to push them away from the doors to get them closed, but if it works (again, it could be problematic with 19s) and if you slide the seats forward you can fit 2 on each backseat (a 8.5s and a 9.5) and another (8.5) on the floor between the seats. This leaves one in the trunk and one in the passenger seat... Try to fit the one on the floor and you'll find out pretty quick if this'll work. Good luck.
Also, when hauling bodies they're easy enough to move bits to make them fit. There's no question you could fit two average people in the trunk as long as they weren't struggling. ^.^

 

You are very wrong.

1. How does an onject with 3sides (triangle) have 4 tips?

2. The tips are where the apex seals go. They do not cause the engine to spark. Spark is provided by 2 spark plugs per rotor.

3. There is not 2 engines in our engine bays. There is one. A 2rotor 13b

4. Each rotor displaces 654cc. Therefore 2x654=1308cc. Hence the 13b name

5. Please refrain from spreading misinformation. That was one of the most incorrect posts I have read on this forum. Great start to your membership here

 

From the https://www.rx8club.com/new-member-f...t-here-202454/ thread


So what is this engine anyway? It's not a piston engine?:
You may have heard that this engine is not a piston engine. This is correct. The RX-8 is powered by a rotary engine, based on the principle design developed by Felix Wankel, from whom Mazda bought the exclusive rights to develop. The rotary engine is very hard to describe with just words, so here are a few pictures:

Exploded view of the engine and it's component parts


All put together:


The total package is quite small compared to piston engines: (That is one rotor, housing, and the eccentric shaft)


So how does it work?

Basically, the combustion sweeps the rotor around the e-shaft in an off-center looking wobble. (This is actually an RX-7 engine, but the basics are still the same)


Here is a YouTube video of the components and motions of the engine:


Dramatic difference from the traditional piston engine.



So, as you can see, we have 3 combustions per rotor for every full rotation of each rotor. However, due to the gearing reduction around the e-shaft, each rotor spins at 1/3rd the speed of the e-shaft. So when you are at 9,000rpm, each rotor is only spinning at 3,000rpm, however each rotor is producing 9,000 combustions per minute, for a combined total of 18,000 combustions per minute. This is most of what produces the buttery smooth power delivery of a rotary engine. You can also see that the motion is already rotational in nature, rather than the continual start/stop of pistons in a piston engine. This is the other main contributor to the smoothness of the engine.

Our "lack of torque" is also a byproduct of this. Each combustion is quite small, and there isn't much leverage provided by the e-shaft angles.



So what makes our engine different from prior RX-7 engines that are also listed as 13b engines?

Primarily, the difference is the location of the intake and exhaust ports.


RX-7 engines had their ports on the rotor housing, so the apex seals sweep across them.
RX-8 engines, the Renesis, have the ports on the end plates and center iron. This means that the apex seals do not sweep across them at all. This enables unburnt gasoline in the exhaust post-combustion to be more likely to stay in the engine to be burnt the next time around, rather than getting swept out into the exhaust system. This improves emissions and fuel economy.

The other primary different from the RX-7 engines is that the Renesis has higher compression rotors, also in the name of power, emissions, and fuel economy.

 

Mod edit:
This is an RX-8 forum, not a Mazda3 forum. Perhaps you hadn't noticed?
-RIWWP

 

Thanx for that.........I kina new wot I meant to say but knew u guys would put it right for me.
even tried to uplaodnthat moving diagram but couldn't get it to paste onto the site.

Big THANX