mysql

quick photoshop shows 4 if we use up 100% of the width for each item. So 8 might be a possibility.

mysql

OK I made a post about it:

http://forums.cobbtuning.com/forums/...d.php?p=569113

PerSmitt

Uhm, here is a newbie question. I read somewhere (in this thread probably) that after tuning the exhaust would get so hot (from leaner idle etc) that it will burn the cat away.

My car is entirely stock and I am planning to buy a European AP after new year. I am looking for a slight power increase, a bit better fuel economy (if I manage to keep my foot light of course) and a 10k rpm limiter instead of 9k.

1. Is this possible? (It should be unless I have misunderstood it all)
2. Will it burn my cat away?

If the hot idle etc is rough on the cat, what alternatives are there to remedy the situation? Race cat? I don't want to fiddle with the car once a year for the annual Swedish emission checks, so removing the cat is not an option for me.

Thanks in advance.

ShellDude

iTrader: (12)

You're at where I was in April. Your expectations are realistic and consistent with the improvements I've seen.

I've seen the cat run between 1400 and 1600 degrees fahernheit according scanalyser and no problems with the cat up to this point, but it can hypothetically be pulled for a number of reasons, only one of which is the potential of burning it out sooner than expected.

There are a number of counties within Pennslyvania that require emission testing so one over here would hypothetically have challenges similar to yours. One could go with a resonated midpipe to reduce noise and then plan on installing it after their annual inspection. Come next year prior to their inspection they could put the cat back on... basically making it an annual process, hypothetically.

PerSmitt

Thanks. I will keep this in mind. Hypothetically speaking, it would be a bit of work to annually install/de-install the cat since I have no good place to work on the car. I don't even have a garage (parked on the street).

Now of course good law-abiding citizens that we are we would never do this.

Would there be any other solution in the form of a race-cat which could take the added heat and still pass emissions (hopefully)?

shaunv74

There are hi-temp catalytic converters available. TeamRX8 was using one from Europe that may be the best route for you. You can PM him for details on it.

Also there is one for sale on RX7store.net for $345 US.

KostasNK

I bought my accessport today finaly!



My first impressions:
The vendor gave me 8 maps with it. The one I am using now is the one with 8000rpm rev limiter, 97-93 degrees celsius fans operation,
increased throttle response and +20% omp and not 30% that I thought yesterday.
He gave me one more with exactly the same settings but with +10%omp that I should use only if premixing. Do you think that 20% is still going to clog the stock cat?
He also gave me the above mentioned maps with 8500rpm redline, but I don't know if it is safe for my engine. He has maps going up to 9000rpm but I didn't get them.
He said that after 8000rpm the hp figure is not increasing, so with the 8500 and 9000rpm maps I am not gaining anything.
The car is really faster now, from one ride I managed to do today.
I haven't had the chance to make acceleration measurements because the roads are wet from the rain and there is no traction.
In the morning I will do some runs with my gtech rr and I will post my times before, and after the upgrade. Maybe sometime in the following days I will go for a dynorun.
My rx8 is a 2006 version with the 4 port engine and a 5 speed manual tranmision.
Interested to hear your opinions!!!

neXib

What would be the point of going to 9000rpm with only 4 intake ports though? Or are they constructed differently so there's still an advantage.

MazdaManiac

iTrader: (3)

I guess it depends on where the torque peak is now.
You want the rev limiter to be a couple hundred RPM higher than the point where you will hit the torque peak in the next gear.

PerSmitt

I am theoretically interested in a resonated midpipe solution just to see where it can be bought and how much it costs.

Does anyone who have looked at this, purely out of an interest point of view, know where such a setup could be bought and how much it costs?

Thanks,
Per

StealthTL

iTrader: (1)

where such a setup could be bought and how much it costs?


Try a midpipe thread, we need to stay on topic.

S

elysium19

iTrader: (1)

To Jeff, with all appropriate respect,

I have been patiently waiting for a response for the last two months, after twice checking with you and confirming information. I have been extremely busy myself, and had not been able to follow up very well, but I believe I am owed a response and hopefully the appropriate maps.
Past communications:
https://www.rx8club.com/showthread.p...04#post2731804
https://www.rx8club.com/showthread.p...34#post2733834

My email address and full name and other information in are both those posts and the emails they refer to. I've tried to be as straightforward and formal as I can about this, but I'm getting extremely frustrated. Please contact me as soon as possible about this.

(Also, I have checked all junk mail folders, my PM box is not full, etc).

MazdaManiac

iTrader: (3)

Have you moved up to the new calibration set?
https://www.rx8club.com/mazdamaniac-183/new-mazdamaniac-base-calibrations-162263/
Everyone was sent an e-mail about it.The e-mail went out in November and your address is in the distribution list.

mysql

Jeff,

My car has some kind of issue right around 88 mph in 6th gear. it feels kind of boggy/jerky. I checked the AFR's and they don't look horrendous. Maybe it's on the rich side. Anyway, do you think the new calibrations will help me? Remember I have the larger injectors and am NA right now. I can easily replicate the issue. I wasn't going to worry about it till I got the BHR coils, but that's taking longer than anticipated.

MazdaManiac

iTrader: (3)

Shoot me an e-mail at ap@ you-know-where and I'll build you a base cal with the injectors setup (refresh my memory about the sizes/placement).

The new coils won't change anything there, so it is DEFINITELY worth while getting on the new stuff.

alienRX8

^^^ haha getting on the new stuff, sounds like a drug

elysium19

iTrader: (1)

179 BHP is a low dyno? I was under the impression that was pretty much normal for a M/T car without major mods.
I thought you'd have to have <<160 or so bhp at the wheels to be worried about compression or anything like that...
My car did 181 when stock.... should I be worried now?? Hopefully that improves once I get a legit tune from MM..... :-)

shaunv74

Depending on the dyno your absolute HP number could vary considerably. It's not really a useful tool to find out what the absolute power output of your car is. It's best used as a comparative tool for before and after to see what your gains are for a given mod over your baseline.

elysium19

iTrader: (1)

Fair enough ;-)

Jeff - I'm sure you put the pieces together, but since my email and name are different, this is the same person you were emailing with earlier this evening, AndrewBauerschmidt@gmail.com Thanks for jumping right into that. This new AP-based logging system seems like it's making everyone's life a lot easier....

alz0rz

iTrader: (41)

cat delete?

elysium19

iTrader: (1)

no, i have stock cat. (so did Andy's8, it seems). Closer to 200 would be nice, I'll head back to the dyno once everything is tuned and I do plugs/coils and such....

mysql

the funny part is that people seek the dyno to give them a number which TELLS them if they are happy with their car or not.

You can't accurately walk into a random turbo rx-8 and tell if it makes 260 or 270 whp. 10 hp really isn't a big deal.

now, a compression test, that would be nicer to know if you want health of the vehicle.

shaunv74

Exactly.

I don't care if the dyno says I have 160hp as long as I can pass the 350Z in front of me on the Straight at Pacific Raceway.

MazdaManiac

iTrader: (3)

Still waiting on Cobb to send me my first batch of Euro-spec and Asian-spec AccessPORTs.

They are trying to integrate all of the international firmware into one package as well as the software.

I had expected to receive them yesterday (as that is the date they gave me), but I haven't gotten a confirmation of that yet.

I don't think its more than a few more days off.