So, I haven't seen a reference to it in print yet, but all the pictures I've seen so far of the Renesis are missing one very critical item - The air pump! Could it be, the Renesis is a clean enough running engine that this parasitic, wheezing, needs one extra belt to drive it, space taking up, hydrocarbon-reducing and sometimes thermal-reactor cooling, heavy lump of metal that has been present on all rotaries (I think) that have been imported to the United States; been eliminated? (It was by me on my first RX-7, which caused me major grief later on)

Also, I know this has been discussed, but has it been stated in print, what octane fuel the engine will require? I know NA rotaries happily burn lower octane gas, but it has been noted a couple times anyway, the Renesis has higher compression.

 

I'll probably just wind up putting 93 octane in it; it's now become quite a habit and I don't forsee anything BAD happening by putting a cleaner gasoline in the tank.

 

Do you mean Air conditioning?

 

Air conditioning is a given these days, but if I could, I'd probably not get A/C if I could have a sun roof!

I meant the vane (I think) type pump bolted to the engine to provide low pressure air to the intake manifold and catylists to help burn the gasses left over from incomplete combustion.

 

Gets too hot in the summer not to have A/C

 

omg, Herc and Qlude, i hope you guys are just fakin' the naivete... the air pump that was the staple technology in early pollution control, the one responsible for the 150 hp corvette (or whatever it was...)???
no, this sucker won't have an airpump, and i don't know of many cars that have any (if one does at all anymore...)... the port layout on this engine allows the HC rich gas, which stays near the trailing tip of the rotor, to be blocked from entering the expiration port in the first place, to be recycled and (eventually) properly combusted. this measure in itself is responsible for the huge reduction in HC emissions...
also, Buger (a while ago) posted a link to an article on Mazda's latest 3-way cat, which was some big leap over "conventional" 3-ways, with some sort of core material eureka factor... it's late, and i can't remember details...
so, this above technology MIGHT be making a difference, but don't forget that the cats of today are leaps and bounds above the cats of only ten years ago...

 

I thought that higher octane gas actually was a worse polluter.

 

Haha.. I'm not faking.. I've never heard or seen an "air pump".. When/where was it used last?

 

when were they used last??? holy smoke man, what a question...
well, i dunno that much about it, but i do know that there were air-pumps in the FC's, and i'm pretty sure those were gone by the FD (which was saddled with a choker of an exhaust system, which was also CAST IRON!! :p)

 

in the wrong application, a higher octane gas may in fact pollute more than the octane specified for the vehicle... like in my GLORIOUS toyota 1.6L, i know that octane shouldn't exceed 89, so i fill it with 87
if i were to put in 93, i'm sure that combustion wouldn't be nearly as complete, as the flashpoint of the fuel is so much higher, and the compression of the engine is mid 9's and the air/gasoline mixture wouldn't reach tempuratures necessary for complete combustion in the cooler spots of the combustion chamber... the timing is wrong, the fuel curves are wrong, etc, etc... it's not made for it.

now, i dunno about the yankee regs, but i know that Canadian gas is about as clean as a mud-puddle, rife with sulfur, which contributes greatly to acid rain (and can quickly render catalytic converters, AND emissions equipment useless)... maybe this higher octane fuel is of a higher standard and contains less sulfur??

 

Olds Intriege 02 has an Air pump I kid you not look for your self
3.5 L V6 to pass emissions

 

heh, like i said, i don't know all that much about it...
but, <<snicker snicker>> American cars, eh??

the worst imports in existance... :p
heh heh heh!! i'm such a Canadian snob...

 

I thought I had seen an air pump in a picture showing the FD engine, but I'm not sure. I don't know what other cars had or have them, my 1969 Datsun 510 did.

Anyway, I'm glad they aren't necessary on the rotary any more!

 

Octane is all about rate of burn, not cleanliness. And yes, some engines will be cleaner with lower octane, as it burns faster.

http://theoildrop.server101.com/cgi/...c;f=5;t=000144

http://www.faqs.org/faqs/autos/gasoline-faq/part3/

 

oh, okay. i dunno, just thought maybe the two would correlate... eh, doesn't really matter
thanks for the info bro.

 

Thanks for the info!

 

Dude, I think we can answer this one now and tell all the noobs in this thread to SEARCH!!!

 

Were you TRYING to dig up a 5.5 year old thread?

 

No, I was searching to find some info on the air pump and found these two threads. The other one is 6.5

 

The only thing better than a threadsurrection is a threadsurrection of a misinformed thread.

 

is this air pump the same thing as an EGR? (exhaust gas recirculation) where it takes exhaust and dumps it into the intake?

 

KKManiac was probably refering to this...

http://www.mazsport.net/store/index....t_detail&p=154

There is an air pump in the RX8, it's on the passenger side, right under the strut bar.

 

this wins the tread revival contest.. wow. 5.5 yrs..

master.

beers

 

I believe the 2007+ 2.5l turbo Subarus now employ air pumps and eliminated one catalytic converter in the uppipe.