BLOWN8

Went to the dyno today, it went alright thought it would be better.
My best was with RE intake, SR high flow cat w/ resonator, mazdaspeed exhaust, and CZ ECU (stage 2 modified) :
194.7 hp and 139.6 torque.

Stock with ecu off was:
178.8hp and 134.3 torque

with the stage 1 map that came with the ECU:
183.7hp and 136.4

I am going to try and post the graphs, becuase below 4500 rpm's it is very choppy. I didn't turn off the DSC or TCS either, i don't know if that had any effect.

Omicron

Nice result, good concise post. But it sounds like you need to tune your Canzoomer. Others (including me) have gotten up to + 25 WHP from it.

BLOWN8

Can you post your map so i can take a look at, to see what the difference is.

Richard Paul

iTrader: (5)

I think this test shows me something.
See my complaint has been with no control over this damn computer I don't know if it is stealing from me. That is why I wish i had a carb and distributor. Then I would have a baseline to judge if the efi gives any help.

Your baseline seems to show the exhaust gave you about 5-6 hp which matches what RB said and I belive them. Next the ecu gave you with the std map 5 more.
But the big kick comes with 11 hp for your new map. Now this may be due to the fact that the std map didn't allow for the better exhaust.

Now we all know it's the combination, but this is a big power boost. Now I'd like to know what your map will do to a stock engine. Can anyone do this??

The reason I want to see that is to know if your new map can set that many horses free without the exhaust. We don't care if that is the only way it works we just need to know.

This could go a long way to figure out what is going on.

Keep up the good work and see if anyone on the forum lives near you with a cz already installed. How about that, anyone out there.

louis1128

keep update for it man

Gord96BRG

Um - Yes!?? I haven't followed dyno threads much lately, but it used to be the consensus that the DSC/TCS would sense that the rear wheels were turning waaay too fast compared to the front wheels (at a standstill on a dyno), and cut back on power. For most accurate measurements, you were supposed to disable the DSC/TCS with the 10-sec push/hold of the button, otherwise, the DSC would be cutting peak power. Even then, it was felt that the ECU would sense a problem and cut peak power unless you disabled the rear wheel speed sensors - Canzoomer's recommendation was that you should unbolt the rear wheel speed sensors and tie them back from the wheels when dyno testing to prevent ECU interference.

Does nobody do this anymore for dyno testing? Are results obtained without doing those steps any good? What's the current consensus? (thoughts especially from those familiar with the prior discussions, please!)

Regards,
Gordon

Richard Paul

iTrader: (5)

Maybe Hymee might want some of those DVD's.
Who knows, when he gets back in shape from all that swimming.

BLOWN8

Well if this helps in any way i did another run with the canzoomer stage 2 map that i got from maurice, and that gave me
194.6hp and 139.1 torque

RX8-TX

The runs I made were with DSC/TCS enabled. I totally forgot to ask Chris (RP) to disable it, thus it stayed on. Having said that, the results I got are in tune with the average. I drove off without any MILs or anything unusual.

At this point, I don't see the point in unbolting and rearranging wires. If the car is making more than what the dyno reads, it'll be welcome, if not, I don't give a rats hat.

The problem will be, if someone wants to tune a car on a dyno...and wants to monitor A/F & timing...well, they are screwed unless they have a degree of certainty that the ECU is not using its mind treachery. Let alone trying to dyno test it.

Does that make sense?

Richard Paul

iTrader: (5)

Blown8 did the new map get rid of the low speed "choppyness"?

IZoomZoomI

so 178 was with the current mods alone w/o cz? Also from your previous posts you said you have the greddy exhaust? Or just completely stock? I have a question for you blown8 but its a bit off topic so Im going to pm you instead.

Hate to say it, I think a lot of people that get there 8 dynoed say the same thing. Yea its no super impressive numbers, some stock 8's currently dyno 190 ish. I guess cz responds a lot better to 8's that originally dyno at the lower #s.
https://www.rx8club.com/showthread.p...dyno+canzoomer

BLOWN8

every map that i did shown alot of choppyness below 4500 rpms, except the stock map for the car.

r0tor

iTrader: (1)

He adds too much advance in the closed loop mode (under 5500 rpms). If you have the programming kit you can tweak it out rather easily - just zero out the timing under 4500.

The map I run is completely stock until 5000 rpms so everything feels nice and smooth like stock... because it virtually is stock

BLOWN8

Well i spoke to maurice and he said that the DSC and TCS should have been turned off because on the car the traction control has four sensors ( one for each wheel), so when it notices that two of the wheels are spinnig and the front two aren't the ecu is confused and thinks that the car is skidding. Which could be the reason maurice said that the lower rpm's is choppy, and also why i didn't gain more horsepower with the real aggressive map that i used, because the car could have went into safe mode. He also quoted that I "wasted my money at the dyno", which sux. Because i always turn the DSC and TCS off i just forgot at that time.

Rennwagen

Wait a sec! 170 at the wheels is NORMAL for a stock '8?

That would mean an insane 31% drivetrain loss to get to Mazda's revised number of 238 at the crank.

In other words, our claimed 238hp motors are making more like 210.

That makes baby Jesus cry.

Gord96BRG

NO! Pay attention! This thread just discussed how the dyno readings are NOT normal because he didn't disable the DSC/TCS for the dyno runs.

If you do a forum search on dyno, you'll find a bunch of threads dating back to last fall that discuss the issues with dyno testing the RX-8. Basically, the ECU is too smart, and has a whole multitude of sensors providing inputs. Some of those sensors aren't happy when the RX-8 is stationary on a dyno, and result in power being cut by the ECU, so it's difficult to get a true dyno reading of peak power.

Regards,
Gordon

TORacing

has anyone tried a four wheel drive dyno? I'm going to a dynopac machine next week, the kind Apexi uses where you actual take the wheels off and strape everything on to the rotors (not the engine rotors), they say this elements inaccuracies caused by the rollers. I wonder if It can be rigged for Four wheel drive?

bryrx804

CZ ECU (stage 2 modified) can someone point me to the site for this..

r0tor

iTrader: (1)

look in our vendor forums under canzoomer

Mr. Port & Polish

I had dynoed 196.5 with no mods when my engine was fresh with low miles.

RotorManiac

Port & Polish
how did you achive that? it's the best dyno I've heard for a stock car...which dyno did you use?

IZoomZoomI

hehe this is that no mods thing again :p. Polak dynoed stock at 190 ish too. Your car has to come out pretty lean from factory to achieve those figures from what i've read.

RotorManiac

I see... Can you clarify 'lean' plz? Sorry

WaitingforFI

iTrader: (1)

The air/ fuel ratio is considdered "rich" when there is an excess of fuel injected into the engine during the injection phase. Not all of the fuel is consumed thus leaving leaving soot on your rear bumper. This will also cause your engine to bog down. It will also decrese your fuel economy. I understand that most RX8's come from the factory that way; however from what i hear this is soposed to clear up around the 10,000 mile mark. Running lean is the oppsite of this. To little fuel injected during the intake phase. This will decrease power as well. Another adverse effect is that your engine will run hot. This will also dammage your engine as well. Espically if your running a turbo.

RotorManiac

doesn't make any sense. both seem bad for the engine.
from your point of view, the reflashes, that reduce the amount of fuel injected, harm the engine...