Narrow and peaky, but at least they were smart enough to use E85 fuel which nobody else on here would ever listen to or consider ....

3000 - 60 ps
4000 - 125 ps
5000 - 260 ps
6000 - 400 ps
6800 - 427 ps
8000 - 400 ps

 

I heard on their posts they used renesis rotors internals everything

 

Even if they posted every detail most would fail regardless ...

 

Why would we ? The modifications required to run that fuel are major and it's a rare fuel . So not really a practical alternative for a street car ................

 

I understand it has been set up to run on regular fuel as well. However, the power is expected to be lower. The E85 would be for track use.

 

The comment on availability just all depends on what part of the country you live in. The benefits of e85 can be great if you can harness them.

 

The smart way to do E85 is with an ECU that has the capability of monitoring an in line flex fuel sensor that will scale fuel/timing/boost according to the ethanol content of the fuel. It's nice to be able to put either gas or E85 in, and mix any amounts of either and the car will figure it out. It's just the more ethanol you put in it, the more power it will make.

Here's a perfect example of a bunch of runs done back to back with the only thing being changed was adding in more E85. Obviously this is not an RX-8, but you get the point. It started at 25% ethanol concentration and the highest power was at 78% ethanol concentration.

 

That is not how hub dynos work...

My track Miata made 123WHP on a Dynapack (Hub Mount) and 125 on a DynoJet (rollers) without changing anything with similar weather.

 

I've similar similar graphs with the adaptronic ... not the select but their big beefy one... the select does support a flex fuel sensor though.... not sure why they're throwing so much money on the ECU.

Great to see a 4 port finally shatter the 300 barrier!

 

The only problem with E85 is that if you have ever premixed, you will need to take apart your entire fuel system and have it cleaned. 2 stroke oil turns into black sludge when you try to mix it with E85 and plugs up your injectors and could kill your fuel pump. You would have to convert to a castor based 2 stroke oil that is designed to play well with ethanol, and using a SOHN adapter to inject that type of oil instead of motor or 2 stroke oil would also be wise.

I've thought about trying E85 but it's a lot of work removing everything that fuel has touched to have it cleaned. Plus having to haul much more fuel to the track is also a downside. Availability is scarce here, only a handful of stations have it.

 

It's a 6 port, still impressive for an auto.

All those guys complaining about there transmissions not being able to handle it need to find something else clutch onto as an excuse.

Impressive as it is, this is more of a because I can build. I feel sorry for any chump that would spend 28K on this.

 

Really
? Looks like a 4 port from this pic of the dyno run .....................

 

Yeah,

 

I think this is great even at 28k

Not saying I would pay that much but damn sometimes you need those "because I can build" builds

 

'PROJECT 500' TURBO RX8 BUILD ON THE FINAL STRETCH



Things have been a bit hectic at Pac HQ for the past few weeks and so our 'Project 500' turbo RX8 has had to take a back seat for a while, however with things getting some-what back to normal in the last week we've had a chance to get back into the build.

A few weeks ago we had the car out for it's first drive on the street as we took the car out to get some fresh air and a full tank of pump EFlex E85 and even on a base tune, putting around the streets the response and low-down pull was impressive.



Late last week the 'Project 500' Turbo RX8 was bolted up to the hub dyno where tune-master Rocky worked on squeezing some power out of the new turbo 4-Port Renesis 13B.



We're still ironing out a few small bugs and taking small steps at a time but in saying that though it didn't stop the 'Project 500' turbo RX8 from producing some solid numbers even in this early stage...



Slowly creeping up on the tune, run after run 'Project 500' improved in bounds before we called it a day at an impressive 427rwhp on 19psi at just 6800rpm. That's through the factory auto transmission and converter...

Just to confirm for those questioning what internals have been used in the engine, this power has been made utilising all Renesis internals including rotors and eccentric shaft. The 4-port block has simply been doweled, ports tidied up and fitted with new race seals; that's it.



With another good 700-900rpm to play with and some more fine tuning we're confident there are more gains to be had and excitement is starting to build knowing that it won't be long until we can get the car to the track.

 

All of this really begs to ask the question, Why a 4 port? Why an auto?

For 28K squeezing 500WHP out of an 8 reliably is already damn near impossible why choose the worst platform to start from and put yourself at even more of a disadvantage.

Just trying to rationalize the mentality, would have loved to see the hard work and dedication go towards something will more potential.

 

It is good to see someone that is prepared to explore the potential. One can assume from this that the 6 port may yield more power.

They must have some really good seals to keep up with 19psi boost. I cant see any catch can so they are able to keep blowby under control somehow. I wonder what is special about the "Race seals"

 

Dyno Tech

 

The 13b-rew found in the rx-7 is only a 4 port.
Perhaps at high boost they dont want the side seals to deal with the apv slots opening. It would also be easier to tune.

 

^same with the FC model rx7. 4ports came on the turbo model and n/a models were 6port

 

4 port has always been "easier" in many tuners eyes. I've heard this numerous times over the years. auto is probably just a result of what the guy who was willing to cough up the mule owned. With that ECU they could fairly easily swap in a 5 or 6 speed transmission.... I believe the 6 speed would require some tweaking to the bell housing but is still certainly doable.

 

4Ports are manuals over there so why is it an auto??

 

In Australia we did not get the cheaper variants of the RX8.

The manual came with a 6 port, 6 speed manual in leather or cloth and Auto was 4 port in leather or cloth. I believe the 4 port auto was later upgraded to a 6 port. Therefore, this build is based on a early model RX8.

 

LOL no wonder why you think that. When Dynapacks first came out, that was the case and pretty much the only people that used them back then were Church, then they updated the firmware (which cannot be changed from the factory) so that they read in line with other dynos. The funny part is that when this happened, Church bought up the rest of the old ones so that all their dynos read higher and he can pretend to be the best tuner on the West coast pumping out huge numbers. Almost no one has these old gen dynapacks anymore except Church.

There have been cars that have been run on their Dynapacks and then run here on a local Dynapack and the difference is about 20-50WHP, it's ridiculous. Pretty much any dynapack you come across now will read plus or minus 5 horsepower to a dynojet.


Like I said, I've had a car on both of these types of dynos and the Dynojet was 3WHP higher than the Dynapack, they're pretty much dead even.

 

4 port is going to give you a lot more midrange torque and therefore feel more fun to drive on the street vs 6 port. It will also be more reliable in the long run since you don't have to rev it to the moon to make any power out of it.

thewird