Nemesis8

iTrader: (3)

Your NOS bottle looks like a Martini Shaker Charles...

Charles R. Hill

iTrader: (7)

Dammit. Now the cat is out of the bag. All those claims of successful performance "comparisons" have been discovered to have been nothing more than a case of the d.t.'s.

CRH

RotaryManiac

If i have no mods, what will reseting the ecu do? By the way, i called charlie at MAZCARE and happened to ask him about the p flash. While on the n flash with several mods (revi intake, rb catback, flywheel, shaneracing pulleys) he made 201.5 to the wheels. After the p flash he made about 204.5hp. BTW he tested the re amemiya header, and it only produced 2hp. Just letting you guys know that a dyno test went from about 201.5 to 204.5 with the p flash

olddragger

iTrader: (3)

guys Marietta 8 dyno'ed 206hp. He has a cat back, a revi intake and an act pro lite flywheel. He knows what he is doing.
olddragger

olddragger

iTrader: (3)

I stand coreccted it was the 204.5HP
olddragger

RotaryManiac

Is Charlie at MAZCARE Marietta?

rxeightr

Yep

Razz1

SO the A/C cut off is suppose to help with the cycling of the A/C for cold to hot.

Good try, will help some but it still cycles between hot and cold at an even RPM when cruzing.

If your claiming more Hp with P, it's time for me to update from M

rxeightr

No, the 'p' flash extends the operation of the A/C compressor to a higher engine RPM before it cuts off.

Charles R. Hill

iTrader: (7)

Here's what I think; if one is not inclined to do major mods like nitrous or turbo, then the P and subsequent flashes are probably a good way to go. Razz, If you find yourself wanting to go to the latest flash do me a favor, please. E-mail me and we can swap PCM's as I wish I still had the M flash because I have had trouble using my nitrous since I went with the N and P flashes.

One other point: My local RX-8 specialist at the dealer has confirmed a suspicion I had. I figured that there were several mapping changes in these re-flashes that Mazda does not disclose, even to the mechanics who install them. When I had the P installed my mechanic showed me a laundry list of concerns on the WDS screen that the P was designed to address and few to none had much to do with A/C compressor cycling. It seems to me that Mazda is in a fit of desperation, just as much as I am/we are, in attempting to meet their/our objectives.

CRH

uacolon

just took my car in at lunch and they said i have the latest wich is n

i neeeeeeddddd the p flash or maybe reflashed to n

uacolon

does any body know when the infamous p flash was released

Brice-RX8

if you look at the start of this thread that will give you an idea of when "P" was released!

RX8-TX

That is one awful drop after 7Krpm. Mine, with the "M" flash looks WAAAAAAY different. Your dyno reminds me of Richard Paul's.

Richard Paul's First Dyno stock

My First Dyno on the M flash

zoom44

you have(or at least had during that run) a mechanical problem not a software problem. in richard's case his problem occurred earlier at teh opening of the tertiary ports. it appears his didnt open. but on yours it occurs later. after 7k. at 7250 rpm the VDI is supposed to open to retune with a shorter path for more power.with that drop in power on your graph i would say the VDI failed to open.

Charles R. Hill

iTrader: (7)

If I remember correctly, Jeff Abrams discovered somewhere/somehow that the VDI system was more for noise control than for power production. He also deduced that as leaky as the flex duct is it renders itself ineffective, for the most part, as a power tuning device. I tend to agree because when I disconnect my VDI solenoid the only thing that happens is a change in intake noise but the engine feels the same(as unscientific as that may be).

When I read through the Mazda MSP04 TSB there was a mention of the high rpm power drop-off and/or knocking noise being due to low metering oil pump delivery causing poor sealing of the side seals. I am under the impression that the P flash is supposed to deal with that and the WDS screen had it listed as a concern. I have also noticed that the noise I was hearing has been reduced some but I am still only getting 14.0's when I should be seeing 13.7's or better. The P flash definitely runs better, all around, but I still lose that power exactly like uacolon is. I am also thinking that when my car ran/felt best in the top end when I had the M flash. RX8-TX's graph shows the power curve exactly as it used to feel when my car last ran strong.

If we could just combine the best aspects of both flashes we would be all set with the re-flash nonsense. Geez.

CRH

rkostolni

Charles, when you say the P flash runs better all around and the P flash fixes the problem with poor sealing related to the oil metering pump you meant the N flash right?

uacolon

problem is that i am using the K&n intake system

not the stock box

what would it be in that case?

Charles R. Hill

iTrader: (7)

rk, the problem with discussing the effects of the different flashes is that, unless we are looking directly at the maps that Mazda rewrote, we really cannot be sure exactly what is going on. When I spoke with Dan, the RX-8 specialist at my dealer, we talked a bit about how there may be several unmentioned problems that are supposed to be addressed with these different reflashes. So, when some say that the P flash ONLY deals with the A/C compressor cycle that may only be part of the story. Dan showed me the P flash list of concerns on the WDS screen and there must have been at least a dozen of them. What I am referring to is that the MSP04 campaign is said by Mazda to deal with a host of problems, including the MOP volume issue. Until I discovered and read that bulletin I had no idea what, exactly, the MOP did or does. Because of my current problem I am now much more informed about it.

I don't know what the hell is going on from the M flash to the N/P flash but I definitely have power/noise issues above 7K+/-. Nitrous use magnifies the problem and I am suspecting poor sealing. The thing is that a CEL is supposed to be tripped but that is not happening. With the M I had no intake noise that wasn't normal. Now I do.

I guess we'll see how this plays out.

CRH

dannobre

iTrader: (3)

Me thinks that you have the VDI and VFAD mixed up. VFAD is the Variable fresh air duct that you removed........opens around 5500 RPM. VDI opens the intakes at about 73ooRPM Different animals

uacolon

where do i find info on this
is this something that should be fixed by my dealer?

RX8-TX

I just saw another dyno from a SE forum guy. There is something definitely wrong with the power band. It falls on its face around 7K rpm.

zoom44

still the VDI not opening. Charles has confused the VFAD, which is the piece in front of the stock intake box, with the VDI which is a valve in the intake track which opens after the tertiary ports to make a shorter more direct path for the air. I believe your VDI didnt open. it should be checked. her eis the diagram. note the connection in pic 4 that opens in pic 5 to make the shorter path

uacolon

thanks that would explain it
where did you get this pic i would like to own the whole book that came out of?

zoom44

you can probably get it at your local mazda parts counter or from ebay. Its the Yamaguchi book