Rev Limiter/ need´s help

[CMF_Elfto]

Hello to everybody

I have a nissan micra K11 1.3l rallycar and now I have tuned my engine, but I got a new problem.

I got much more hp, but we dont know how much because the engine hit to rev limiter.

The question--> Does anyone know´s how I could take that limiter away?

Please answer me a.s.a.p , because now the man who make those final adjustments wait an answer from me and my next rally will be 29.01.06

Kind´s Regards, Toni from Finland

 

[CMF_kneival]

The limiter is built into the ECU and cannot be easily removed. Obviously a full ECU change would do it and a piggyback might do it.

What are you thinking of taking it to? Normally 8000 is about the max, your one at the moment will be around 6700.

 

[CMF_Yom]

I'll sell you my factory BOSCH ECU which let me rev past 7000rpm (to 7500rpm to be exact) while accelerating on the freeway - twice. Not game to go any higher because of possible fueling issues at those RPM.

How do I explain it? I dunno. Its too hot here in Brisbane to lie in an uncomfortable position in the car and remove the ECU, because it looks like I have to remove the second metal box with a big loom going to to underneath the factory ECU.

 

[CMF_Elfto]

Yes now it´s about 6700rpm and I need it to change that between 7500--8000rpm.

I have already added the bigger fuel pump and perfect power. We have added that perfect power side of original box and now we could change ign.timing and air amount etc. Still we don´t know is it possible to cheat the original box with perfect power and that how take that limiter away.

- toni -

 

[CMF_kneival]

If you want to speak about chipping the original box give micra_pete at www.micraholics.co.uk an email, he has chipped and tunes his own ECU and can remove rev limits. Does cost a fair bit of money tho.

Yom its probably just the tacho faulting, I thought mine did but when I read from consult it only went to 6700 when tacho shows around 7500.

When pete looked at the code the limiter was deffo 6700 :]

If you are really interested you could download the ECU code via consult and send it over for inspection?

 

[CMF_Yom]

I would if i had a consult cable.

I let it go with the Pulsar. I thought the consult ports were different between the Jap N14 and the UK K11.

 

[CMF_micra_pete]

nope, all consult connectors are the same, until the late nissans, which changed.......

it makes sense in my head

 

[CMF_micra_pete]

"Does cost a fair bit of money tho. "

far cheaper than any stand-alone, cheaper than most piggy-backs even!

 

[CMF_Yom]

Yeh. You can stop rubbing in how stupid I am to let it go now. lol

If i can find one, would you be able to supply me with the program you use to extract the ROM data? I only had a simple windows program which showed some guages which refreshed every few seconds. It was basic but it let me know what sensors were playing up, etc.

 

[CMF_micra-man]

Remember folks "The bitterness of poor quality lingers long after the sweetness of a cheap price is forgotten."

micra_pete has put a lot of time and research into getting to know the K11 ECU. I would say he is the leading expert on these in the world.

It WILL be money well spent.

Besides it's a race car, your sponsors are really paying for it anyway and as I said it will be money well spent.

And before you ask, No, I'm not on micra_pete's payroll.

 

[CMF_micra_pete]

Yom, the ecu needs modifying internally, and various codes / maps changing, its not really a simple job, micra-man, thanks for the compliment, but i would not go that far!

 

[CMF_micra_pete]

sorry yom i miss read, if you tell me what number is on your ecu, you may not need to suppy me with rom, as i may already have it

 

[CMF_Elfto]

Pete does that mean that I should send the box to you and you will make a changes and then you send the box back to me.

How much it cost app.

- toni -

 

[CMF_micra_pete]

can we not do this on cisco's forum, as it messes it up a little, i will be happy to answer anything by e-mail

 

[CMF_GTRHOLIC]

hi, if my memory serves me well, im pretty sure a number of the japanese devices lift the rev limit. im pretty sure the apexi super sfc is one of them. hks sld?(speed limit defencer) might be another one. rev speed meter might be another.

 

[CMF_micra_pete]

im sure most dont, either way i wouldn't trust a piggyback to up the limit on a high tune car!!

 

[CMF_James MSC]

"i wouldn't trust a piggyback to up the limit on a high tune car!!"

Does that include the E-manage Ultimate? As that's what I was planning to use to up my rev limit with the cams installed :S

 

[CMF_micra_pete]

i know others would say otherwise, but personally no, the e-manage ultimate, imo is the best of the bunch though, as it can correct quiet a bit, but your still tricking the ecu

 

[CMF_Elfto]

Hey everybody!

Thank you that you tryied to help me with that issue.

Now we have solved the rev limiter "problems". Now we had set limiter to 8000rpm. Also we changed fuelchart, ignitionchart etc. Now I got it out 130hp.

Everybody who is interesting to tune your ecu´s could send me a mail [email protected]

Best Regards,

Toni

 

[CMF_Polar]

good you got it sorted. how about posting here what parts and work was done to get the results. saves you replying to lots of emails.