Best ECU maping for b7 RS4

[PetrolDave]

Calm down dears, it's only a remap.

There are many suppliers of remaps - the bad ones tend to fall rapidly by the wayside, those that remain in business all offer gains of some form.

Since no one remap suits every person it's to be expected that each supplier will have their champions and their detractors, so let's all understand that and let each of us be happy with what we've got.

[Stevec33]

Do jhm do a different map for uk cars than for cars in the u.s.? Obviously our fuel is much higher octane than what they have over there

[m14rrv]

I'll let everyone know what all the fuss is about... I'm gonna get the JHM map in the New Year....

What's the map have from Jhm. Coding out lambs sensors?

[PetrolDave]

Do jhm do a different map for uk cars than for cars in the u.s.? Obviously our fuel is much higher octane than what they have over there

You're being fooled by the different way that octane ratings are expressed in the US and UK.

In the UK we quote RON ratings, but in the US they quote the average of MON & RON ratings - which is about 5 lower than RON.

So US 93 octane = UK 98 octane (super unleaded), and US 90 octane = UK 95 octane (regular unleaded).

[sakimano]

FWIW there is a huge 1/4 mile following in SA and twice a month half the city rocks up at Tarlton Raceway! We have a TVS 1320 RS4 running low 12s at 1800ms above sea, so pretty decent!

We only have APR charged RS4s here and all obviously APR mapped! They pretty good at understanding the crap fuel we have and the thinner air. They have a few mad TTRS's too

Anyway JHM for sure seem to be top choice looking at the forums and results....and now that you don't need to send them your ECU like you had to with the S4, it is really a viable option

South Africa indeed has a great 1/4 mile following. As does Australia, America, Canada, Europe, UAE , and believe it or not, even the UK. Some people on here just want to pretend that's not the case because it suits their excuse list for shitty results (or no results due to fear of shitty results)



Re: those APR supercharged cars being APR tuned, the funny thing about that is...guess who APR turned to for help when the tvs kits weren't performing well?

JHM

[quote="APR]
Opelika, AL: On Sunday, March 13th 2011 at Montgomery Motorsports Park APR set a new world record for the fastest 1/4 mile time with an Audi RS4 B7 4.2L at 11.833 seconds confirmed by video and the NHRA certified race track in Montgomery, AL.

The new world record was set due to recent revisions in the intercooling system and a new calibration developed by APR’s Engineering TEAM in conjunction with a calibration engineer on the OEM side of the industry that works with JH Motorsport in California.

http://www.youtube.com/watch?v=xx0EBeRp54w
[/quote]

[sakimano]

I'll let everyone know what all the fuss is about... I'm gonna get the JHM map in the New Year....

What's the map have from Jhm. Coding out lambs sensors?

Lol

That's the hallmark of a crap tune, if they are turning things off. RUN AWAY from a tuner who is turning off things like AFR protection or EGT on the B5. It means they can't manage stock safety mechanisms, and are instead content to disable them rather than learn how to tune properly.

JHM's tuner sets AirFuelRatio to a level best suited for making power on an NA car. In fact he increases the car's sensitivity to lean conditions to protect the car if there is a problem with hardware (generally hardware problems that are fuel delivery related can result in misfires triggering check engine lights. The JHM tune will actual trigger a misfire CEL sooner than the stock calibration. People sometimes get the tune and have a CEL right away, alerting them to injector or pump problems that the stock tune was allowing to happen because it was not outside of stock tune thresholds).

[Timster]

Please make it stop..

[hlbeckley]

Re: those APR supercharged cars being APR tuned, the funny thing about that is...guess who APR turned to for help when the tvs kits weren't performing well?

JHM

Good point

Ok so them none tuner specific but altitude related then, would a "standard" tune ala JHM/MRC/APR help generically for our level above sea????
Failing that can a tune be tweaked to help us Saffa's?

[m14rrv]

didnt mean it like that. if you are running no cats. so need to code second lamba sensor out to stop lamba sensor faults. and you can cancel the secandary air ijection out aswll for cold start. is there a right up on this jhm remap or what is included?

[sakimano]

didnt mean it like that. if you are running no cats. so need to code second lamba sensor out to stop lamba sensor faults. and you can cancel the secandary air ijection out aswll for cold start. is there a right up on this jhm remap or what is included?

When you delete cats the second o2 sensor doesn't need to be coded out at all. You can just adjust the threshold for the catalyst efficiency CEL so that it isn't triggered within the tune. Semantics maybe, both accomplishing the same thing.

For deleting secondary air injection, don't you also need to physically block it off with a plate?

You can contact JHM at v8@jhmotorsports.com or hit up their Web page.

[sakimano]

Re: those APR supercharged cars being APR tuned, the funny thing about that is...guess who APR turned to for help when the tvs kits weren't performing well?

JHM

Good point

Ok so them none tuner specific but altitude related then, would a "standard" tune ala JHM/MRC/APR help generically for our level above sea????
Failing that can a tune be tweaked to help us Saffa's?

I think on a boosted application maybe cause you're always at a much different pressure than 'normal' to start.

but with a supercharger you can't control or vary boost without changing pulleys so that could become an issue if you were to drive to a lower elevation.

For an NA car I am not sure what a file would change to address altitude? I know that the JHM tune includes launch control in the tune itself (free) and if you're at a very high altitude it might make sense to adjust the level (rpm) at which it engages as you need a bit more rpms to overcome traction since you're making 20-25% less torque than those of us at sea level.

[adsgreen]

but with a supercharger you can't control or vary boost without changing pulleys so that could become an issue if you were to drive to a lower elevation.

Slight tangent, but one of my track cars has a supercharger with a vacuum controlled adjustable bypass valve so you can control it just like a turbo but agree it's not quite the same. At least with a turbo there are considerably less penalties to making large 'boost' and dumping what you don't need but for some limited classes that feature restricted whp it's the only thing you can do.
I know from previous threads the MRC supercharger has something similar but that is more for improving cruise fuel economy than anything else.

For an NA car I am not sure what a file would change to address altitude? I know that the JHM tune includes launch control in the tune itself (free) and if you're at a very high altitude it might make sense to adjust the level (rpm) at which it engages as you need a bit more rpms to overcome traction since you're making 20-25% less torque than those of us at sea level.

It's a tricky one - the stock ECU should adjust as the MAF should report pressure and flow giving a pretty solid reading for the amount of oxygen it can get. I guess it largely depends on how aggressive the timing can be as it'll probably knock like a bastard 'till it can back it off. TBH though I've never had any experience of mapping at altitude. Worth seeing if there are any JHM customers in and around Denver - I know the altitude knocked the crap out of me when I was working there.

[RIV]

+1 it's New Year's Eve, I'm off for a drink

[LC99g]

Can I ask if anyone here has any experience of. O.CT tuning, or Oscarli tuning ?

[sakimano]

Slight tangent, but one of my track cars has a supercharger with a vacuum controlled adjustable bypass valve so you can control it just like a turbo but agree it's not quite the same.

Good point

The audi 3.0t has the same