Stage 4 Pac Performance Low Mount Turbo Package
11-17-2013, 11:35 AM
#127
That kind of power on a 4 port engine is pretty impressive.
but its all about the details, I wish the community wasn't so "Secretive"
I mean how much porting did they do?
did you notice the turbo didn't have a wheel in it?
did they us OEM size apex seals? Groove out the rotors for deeper seals? use rx7 rotors?
looking at the video and seeing the different dyno curves 0:52 it looks like a really slow spool.
so maybe its a completely different turbo then posted pictures.
what is the timing like? afr's like? could they be doing something fundamentally different then what we consider normal for a tune? especially sense most of the information people base there conceived power output stems from tunes made by MM who has sense been banned, and failed miserably at some recent boosted cars....
I don't think there is enough build information to say what it can and can't make. I wouldn't be surprised if it was fitted with rx7 rotors and had a huge laggy turbo on it....
but its all about the details, I wish the community wasn't so "Secretive"
I mean how much porting did they do?
did you notice the turbo didn't have a wheel in it?
did they us OEM size apex seals? Groove out the rotors for deeper seals? use rx7 rotors?
looking at the video and seeing the different dyno curves 0:52 it looks like a really slow spool.
so maybe its a completely different turbo then posted pictures.
what is the timing like? afr's like? could they be doing something fundamentally different then what we consider normal for a tune? especially sense most of the information people base there conceived power output stems from tunes made by MM who has sense been banned, and failed miserably at some recent boosted cars....
I don't think there is enough build information to say what it can and can't make. I wouldn't be surprised if it was fitted with rx7 rotors and had a huge laggy turbo on it....
11-21-2013, 06:07 PM
#131
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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.
11-21-2013, 06:19 PM
#132
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.
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.
11-21-2013, 06:27 PM
#134
weeeeeeeeee
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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!
Great to see a 4 port finally shatter the 300 barrier!
11-21-2013, 06:37 PM
#135
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.
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.
11-21-2013, 06:47 PM
#136
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.
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.
11-23-2013, 05:52 AM
#140
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'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.
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.
11-23-2013, 06:30 AM
#141
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.
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.
11-23-2013, 06:49 AM
#142
rev it up
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"
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"
11-23-2013, 09:47 AM
#145
^same with the FC model rx7. 4ports came on the turbo model and n/a models were 6port
11-23-2013, 09:47 AM
#146
weeeeeeeeee
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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.
11-27-2013, 06:53 PM
#148
rev it up
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.
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.
11-27-2013, 10:25 PM
#149
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.
Last edited by Arca_ex; 11-27-2013 at 10:28 PM.
12-02-2013, 09:07 PM
#150
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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
thewird