DCSBlack Knight

For the record, next time guys, just ask. I am only sharing this because we are getting results and we don't want anyone to beat the 8. I don't have too. So consider that before you inquire with insults and insuations that I am lieing to you. I have no reason too, and I gain nothing by doing so.

When I get back from the holiday, will put together the rout we took to get the car to perform. Some of what was done as you have already seen takes away the strictly correct EPA standard, but one only has to go as far as one is willing to dare.

Oh, one more thing. Those who are race oriented, ISCCA allows us to establish our own class of car. We need 5 race certified ISCCA drivers to create the basis for an RX8 class. We are even allowed to write our own regs for the class for approval. If anyone is interested in the possibility let me know. Only limit is that it is NW racing only. Oregon, Washington Idaho, and I think California, but I will have to check on that.

dmp

ISCCA? Imperial Sovereign Court of the Chinook Arch?

What kind of racing?

Charles R. Hill

iTrader: (7)

So, finally after all this argument DCS asks a question of his/her own seeking help rather than assume he/she is the only one to have said issues. The strange thing is that even piston engines routinely see rpm's higher than 6,600 these days so I wonder about the limitations that DCS has experienced with the shop he/she went to.

Now, can we all just get along?(yes, I am a little behind the curve here)

Charles

zoom44

have we met? Do you know another owner named Randy who has a black with red/black interior and has doen a bunch of work on his car? have you been to any RPNW meetings or events? id swear i have met a person who owns an 8 with "black knight" graphics on the window. have you tried asking Dan Atkins of Atkins Rotary where they Dyno their Cars? Or Rob Golden of Pineapple racing? or how about Corksport? Icemaster ( a member who used to live in WA) should know of a few good dyno places. try PMing him. Kari might know as well. Nemisis8(kevin) has a really good Rotary tuner helping him with his car. they must know a good dyno in the area! We dyno'd a couple of 8s last april on a mobile dyno at one event. should be able to find when those folks will be in the area again.

DCSBlack Knight

My error. International Conference of Sports Car Clubs of America “ICSCCA.” I seem to always miss the first C.

DCSBlack Knight

Ya as a matter of fact I do know him. Yes to the second answer. We have had nothing but a major challenge at getting anyone to Dyno the RX8 all the way. The best we have gotten to date is to compare the cars to the max the dyno operators can go and that is 6600RPM. They all agree that it has something to do with the on board computers causing the problem with the dyno computers. The one thing for sure is that with each adjustment, power to the rear wheels keeps climbing, and the car keeps running better and better.

The first time all the cars we dynoed together resulted in a comparison between a totally stock RX8, one with a custom cat back we will call it, and now with the new map flashed on one. The result was that the one with the exhaust system up grade had almost 15 hp to the rear wheels over the stock, and the one with the adjusted map had about 16 over the stock. To day none of the cars are stock any more. I don't think anyone in that group has a totally stock RX8 any more.

It is not so much the car is getting more hp is more that more is going to the wheels instead of everywhere else. Reducing weight in any car does not increase overall power but redirects the power to where it is wanted. What we all have been attempting to do is eliminate all the power robbing items in order to drive as much of the actual power back to the real wheels. Once that is done, then forced induction, or working over the engine will most likely help.

The one thing that seems to be the biggest help and recovering the wasted power is being able to reduce the fuel in the mix or lean it down. Taking the cat out really showed just how much raw fuel was going out the pipes. Leaning it down, and I mean way down brought more raw hp back to the wheels than any other action so far. Every thing so far has helped a lot, but getting the air fuel and the timing adjusted really made a big difference. Right now in the upper end of the RPM, 4000 and up, the average lean out is about 25 percent leaner than the most recent map from Mazda. The average timing advance is 12 degrees. This setting is a bit touchy though. Requires 91 octane or better.

Not like the old days when leaning out the mix only required a screw driver and advancing the timing required a simple dwell meter and a timing light.

It is my intention to install the super charger once it comes out. But I really would like to get the before and after dyno that will take give a reading all the way to red line.

Later on I will post the pictures we got of the car on the track in Portland shooting the fire *****. If I can figure out how to put a short film clip on here so you can hear and see the car at the same time I do that.

One thing is certain, on the track, the RX8 is proving to be the king of the road.

Keep you posted on the results if all the suggestions work out.

zoom44

2 things you need to do to get a decent dyno reading-1) is to disconnect the rear abs sensors. it takes a 10mm wrench i believe. tie them up out of the way so that they dont get caught in anything. 2) is to keep the dyno runs short. even with the abs sensors disconnected the pcm notices gear selection, throttle position, rpms etc and if you run too long it starts thinking things are going wrong and starts dumping fuel and timing to cut power. it will also throw some lights on the dash that will go away after awhile. so keep your runs at like 10-15 seconds. you'll notice on the highend of the graphs that it gets "jaggedy" but you'll get full rpm range runs.

p.s. one of the 2 we ran on the dyno that i mentioned was randy's. i believe he pulled 15 peak hp better than the stock one that night just with his exhaust done.

DCSBlack Knight

Ok, We will give that a go. Man, I still say the good ol days before computers. Thanks for the impute.

dannobre

iTrader: (3)

9 of us dyno'd at CarbConn in Kirkland.....They had no problem with us running to 9K. They did have a difficult time getting a proper RPM signal to use. So a lot of the runs we were using HP vs speed

If you post the Greddy .GSC files for the maps...or the log files, there are a lot of us that can open them up.

If you have a CanScan, or Wideband logs in almost any format...we can read those too...so please post us some data that will help us understand what you are doing

Dan

california style

so far so interesting, it seems everyone is helping each other out a bit more now in this thread, instead of slagging each other off, which is good....