speed cut RX8

[geodude]

yeah guys i am looking to remove the speed cut from my 2006 AT RX8,
i would love if someone has a device i could just plug in and it would remove my speed cut and increase the performance of the engine, i have been reading about the Cobb AP which seems like the way to go does anyone here sell it,
please point me in the right direction here

[cinco]

hks speed cut defenser

[turbohead]

the cobb doesnt work on jdm rx i tink. google it an you will see. i forgot why though.

[geodude]

i have been told this before ,i was also told that it doesn't work on AT, but it is untrue
maybe initially this was the case but now with MazdaManiac in the mix its possible,
all you need is the proper base map from Mazdamaniac which you get if you specify where your car was sold, year of manu and transmission type, when purchasing the COBB form the MazdaManiac site (this is the only place to get it as COBB has discontinued manufacturing the AP for the RX8)

Then do you data logging runs and submit to Mazda Maniac via email and they provide a Customed tuned map for your car.

So it does work for the JDM, Manual and AT if you use the services of Mazda Maniac but it costs extra .

Go to the mazdamaniac.com website and you will be able to see for you self.

[CD4Accord]

So, what is the current speed cut?
Some of those older Mazda ECU's cut out at about 114mph or ~185kmph.. Back in the days of OBDI was nice and simple, cut a single wire coming off the ECU and problem solved...

[geodude]

^^^
the speed cut on the JDM RX8 is 187 km/hr

[geodude]

hks speed cut defenser

i was considering the HKS but to me it has only one use where as there are others on the market which can be used to remove the speed cut and also help with engine management (the COBB AP seems to be the favorite) so i leaning towards this right now, but most likely i would have to import it and get a tune by Mazdamanaic but this costs muito dinero,
i haven't made up my mind yet as to what i exactly want out of the car but i foresee the car requiring some sort of engine management system and tuning eventually so i don't think the hks will be worth while for me in the long term.

I think i will get the COBB AP with a custom tune by MM along with the BHA Ignition kit, for the xmas, then build from there

[novastar1]

Also think about where you can safely run that speed.
We only have a few places that you can drive that for more than a few seconds.

Speed cut on my vehicle is 180 km/hr I think which is the legal upper limit for a JDM production car.
It can get there quickly but I never really needed it to go further.

Would a simple ecu retune do it for you?



COBB is not compatible with JDM models.
Think they are more geared towards the american market.

I think HKS makes something analogous to the COBB accessport, but I'm not sure

[geodude]

guys i know you are all trying to be helpful, and i appreciate the feedback, but just to clarify the Ap is available for all JDM models of the RX8

This is from a post made by Mazda Maniac on RX8club.com in 2009 regarding the AP
see link here

http://www.rx8club.com/showthread.php?t=165085

The Cobb AccessPORT for all JDM models is now available.

Custom Calibrations are now available for those that have purchased their AccessPORT from another vendor.

The Cobb AccessPORT allows the RX-8 PCM to be modified to accommodate for a wide variety of modifications and operating conditions, including FORCED INDUCTION.

The AccessPORT is the most user friendly reprogramming device for your vehicle's computer. The provided mapping will optimize the air/fuel ratio and ignition timing, remove the speed limiter, and more for performance results you can instantly feel!

But the AccessPORT is so much MORE than just a REFLASH DEVICE. It allows you to monitor your Fuel Economy (average and real time), perform performance tests in order to estimate your 0-60mph and 1/4 mile time, read and decipher ECU trouble codes (CELs), and monitor live data via the OEM vehicle sensors which eliminates the need for costly and cluttering aftermarket gauges!

[Rainman]

@cobb wont work on JDM --------- yep thats correct.

[geodude]

Also think about where you can safely run that speed.
We only have a few places that you can drive that for more than a few seconds.

I know that finding places or situations for this type of speed is rare and dangerous and not very practical but i just want it remove it, because its a limitation on the car performance

Would a simple ecu retune do it for you?

no such luck unfortunately

COBB is not compatible with JDM models.
Think they are more geared towards the american market.

I think HKS makes something analogous to the COBB accessport, but I'm not sure

@cobb wont work on JDM --------- yep thats correct.

rainman did you not see the comment and link i posted above your post it does work for all JDM models of the RX8

so guys give me some other options nah,

[turbohead]

we reached 230 kph with a stock ecu and no mods on a rx-8. whilst driving with a manual rx depressed the clutch pedal as not to engage teh clutch but rather remove free play on teh pedal. you will encounter speed excess of 180

[V2NR 3.0]

So why do you wanna go faster ?

Isnt 187km fast enough ?

[geodude]

i am not to interested in removing the speed cut maybe i should have given the thread another name, what i am interested in is modifying the ecu, for better performance, which is why i stated that although the HKS SLD would simply remove the speed cut i am looking for something that would aid in improving the over all performance of the car , and assist in engine management, however all the devices i have found thus far also allow the cars speed cut to be removed and the Rev limit to be adjusted,

I realize the the RX8 is not a crotch rocket and designed for driving pleasure rather than straight line dragging, there are not much vehicles that can come close in terms of handling ability, i really not into street type shoot outs anyway so 187 km/hr is good for me, what i want to do is improve the lower end as i find the response time from a dead dig is a bit lacking.

But still soon enough i intend to go FI just for the fun of it

[FaLLeN AnGeL]

we reached 230 kph with a stock ecu and no mods on a rx-8. whilst driving with a manual rx depressed the clutch pedal as not to engage teh clutch but rather remove free play on teh pedal. you will encounter speed excess of 180

does this really work....

[fcbarcelona]

Sell the AT rx8, get a type s..... you won't regret it

[FullStop]

buddy if the cobb AP is available for your car, go for it. That is ideal,, you can do some tuning and remove your speed cut. Its probably the best device of its kind.

[kerwin1968]

Simply get a greddy ultimate it will give you the speed cut plus all your tuning needs and there are a lot if tuners here that will create proper maps for.you like.Dry from valsayn

[cinco]

buddy if the cobb AP is available for your car, go for it. That is ideal,, you can do some tuning and remove your speed cut. Its probably the best device of its kind.

do the cobb devices work for non USDM cars?

[FullStop]

yeah, its available for JDM vehicles now. and it doesnt require any wiring, so in that regard and in terms of simplicity, its way better than the greddy ultimate.

[turbohead]

we reached 230 kph with a stock ecu and no mods on a rx-8. whilst driving with a manual rx depressed the clutch pedal as not to engage teh clutch but rather remove free play on teh pedal. you will encounter speed excess of 180

does this really work....

tried and tested and it does work, i was confused at first but i doubt that the speedo was malfunctioning bcuz we did it on the betham goin both ways on separate occasions

[FaLLeN AnGeL]

we reached 230 kph with a stock ecu and no mods on a rx-8. whilst driving with a manual rx depressed the clutch pedal as not to engage teh clutch but rather remove free play on teh pedal. you will encounter speed excess of 180

does this really work....

tried and tested and it does work, i was confused at first but i doubt that the speedo was malfunctioning bcuz we did it on the betham goin both ways on separate occasions

Tried it and it somehow had some merit to it I got over 200km

[turbohead]

at 12am beetham highway you will get a kool 230

[CD4Accord]

You will also get a lovely brick/rock waiting for you in the road... See what happens when you hit it at 230kph...

[bella776]

Hello i have a 2008 MIVEC lancer, i need to remove the speed cut, can anyone point me in the right direction? Who can do it for me a phone # etc? what to buy...

[turbosingh]

Hello i have a 2008 MIVEC lancer, i need to remove the speed cut, can anyone point me in the right direction? Who can do it for me a phone # etc? what to buy...

Greddy Speed cut defender.