Speculation On Tuning
#26
I would say that the Renesis design allready allows the maximum porting for a street engine that is fully 'smogged'.
As was mentioned, highest gains for power would be
1. de-smog
2. free flow exhaust
3. adjustable fuel delivery
I suspect this would bring your Renesis to 300 hp with ease.
The way things go I would even bet on a bolt on supercharger that may take you to 350 hp or more.
On a new car????? no way ! hamx0r said best to play with old beaters. try this on for size... make an old 12A run backwards and turbo the intake through the exhaust ports. Looks feasable to me in order to increase the combustion time by 20 or 30 percent. might make a good boat engine, hmmmm
As was mentioned, highest gains for power would be
1. de-smog
2. free flow exhaust
3. adjustable fuel delivery
I suspect this would bring your Renesis to 300 hp with ease.
The way things go I would even bet on a bolt on supercharger that may take you to 350 hp or more.
On a new car????? no way ! hamx0r said best to play with old beaters. try this on for size... make an old 12A run backwards and turbo the intake through the exhaust ports. Looks feasable to me in order to increase the combustion time by 20 or 30 percent. might make a good boat engine, hmmmm
#27
Registered User
Join Date: Aug 2002
Location: Denver, CO, USA
Posts: 2,045
Likes: 0
Received 0 Likes
on
0 Posts
Re: Speculation On Tuning
Originally posted by veloceracing
Well here goes. I plan to build up my RX8 as many of us do.
Well here goes. I plan to build up my RX8 as many of us do.
With that being said, let's talk tuning! :D
...I will be waiting for lower compression rotors, hopefully down to about 8.2:1 or 8:1 so ...keep in mind though you will be losing fifty HP (approx) with low compression rotors...
...Do some porting and based on what some FD's...
...Add a good exhaust and you can benefit to about an additianal 10-20 hp, I say 15 for arguments sake...
...Add an intercooler and get another 15...
As far as smog legality, more and more municipalities are requiring smog testing similar to California. California is simply the toughest standard in the states, so car companies use it as a guideline for their U.S. setup (regardless of where they might be "marketing" it), 'cause if you can make it there, you can make it anywhere.
The emissions requirements on this engine are going to be as different as the porting setups, and one thing that we do know is that it won't require as much emissions equipment as the previous rotaries to make the required smog levels. So, I don't think that we'll see as big of a gain from removing smog equipment as you once could.
It will be interesting, though, to see how you would have to adjust these new ports to change the "cam profile". Just like other NAs, once you balance the engine, remove restrictions (polishing ports, intake, exhaust, rotating weight, etc.), all you are left with is spinning the thing as fast as you can (meaning running it at higher rpms).
---jps
#28
Registered User
Join Date: Sep 2002
Location: Illinois
Posts: 363
Likes: 0
Received 0 Likes
on
0 Posts
Output
The RX-Evolv only had a 280 ps estimated target power output. The RX-8 is supposed to have 250 ps (247 hp).
Smog equipment? Does that refer to the catayltic converter. The RX-8 should NOT need secondary air injection because it runs lean. You can't just take off the cat. I would hope that the exhaust is very free flow from the factory (dual exhaust or just dual tips)
I would hope to get 250 hp, and if N20 is used when the top end ports open up (6500?) maybe 375 hp is possible,(if you replaced all the incoming air with NOS) and a whole lot of fuel is put inside the RENESIS
Smog equipment? Does that refer to the catayltic converter. The RX-8 should NOT need secondary air injection because it runs lean. You can't just take off the cat. I would hope that the exhaust is very free flow from the factory (dual exhaust or just dual tips)
I would hope to get 250 hp, and if N20 is used when the top end ports open up (6500?) maybe 375 hp is possible,(if you replaced all the incoming air with NOS) and a whole lot of fuel is put inside the RENESIS
Last edited by MikeW; 09-23-2002 at 10:49 AM.
#29
mostly harmless
Join Date: Jun 2002
Location: Greater Vancouver Area, BC
Posts: 3,440
Likes: 0
Received 0 Likes
on
0 Posts
ya, i speculated before on another thread (the "turbo?" one i think) that Mazda is building this car with performance in mind, not grocery-getting, so the exhaust system ought to be pretty trick coming from the factory...
also, the 5+6 ports activation range can be seen on the torque graph someone posted earlier (where is it now?? lemme see... yep, looks like your hunch is about right MikeW) illustrates this... and you think you could jam a 125 shot in that sucker?? wow...
also, the 5+6 ports activation range can be seen on the torque graph someone posted earlier (where is it now?? lemme see... yep, looks like your hunch is about right MikeW) illustrates this... and you think you could jam a 125 shot in that sucker?? wow...
#30
Registered User
Join Date: Jul 2002
Location: hell-(the Florida keys)
Posts: 52
Likes: 0
Received 0 Likes
on
0 Posts
A 125 shot is a lot especialy for a rotary. It can be done but its a lot for a stock engine to handle.
N2O is probaly the best major power adder. Other things requred i know (more fuel, higher flow injectors, ect)
That would be alot of fun to put a renesis in a RX-3. 300Hp 2000lbs Whoa!
N2O is probaly the best major power adder. Other things requred i know (more fuel, higher flow injectors, ect)
That would be alot of fun to put a renesis in a RX-3. 300Hp 2000lbs Whoa!
#31
Registered
iTrader: (4)
I don't see how you can think the rotary has evolved about as far as it can go. The piston engine has been around far longer and had many, many times more research dollars put into it and advances are still being made. If the rotary had anywhere close to the research put into it that the piston engine had, it would be much farther along than it is.
Of course, the rotary has benefited a tremendous amount for the work that's been done on piston engines. I still think the point is valid. If piston engines aren't maxed out, neither are rotaries.
Of course, the rotary has benefited a tremendous amount for the work that's been done on piston engines. I still think the point is valid. If piston engines aren't maxed out, neither are rotaries.
#33
Huge hole is huge
This ancient post gave me a chuckle.
Thread
Thread Starter
Forum
Replies
Last Post
JimmyBlack
Series I Major Horsepower Upgrades
273
02-10-2020 10:23 PM
Danield97
Series I Trouble Shooting
1
09-30-2015 05:59 PM