JHM Tune 101 what you want to know

[Justincredible]

As with many things in the B6 and B7 land we get new members that don't always get a chance to get the full read and full deal on the scope of several products.

While I know people are always looking for something new. JHM is the real deal. Many companys have tried to come with gimmks and cheep offers but JHM contently gives its users the BIGGEST gains with the largest experience. My car with full exhaust and a JHM Tune made 43wtq and 44whp over stock.

Its not preferred by 75% of the S4 guys because it doesn't work


http://www.audizine.com/forum/showth...ustomer-review


So I thought I would start with the tune as Ive been extremely happy and wouldn't get another tune other then JHM. Ive had my JHM tune for a long time and Its been threw the few free revisions that jhm has offered FREE to us the loyal customer.

The one big thing that you will hear from a very small group of people is the throttle. Lets stamp this one out of the way. Below is a simulated dyno of the JHM tune VS another strong tune offered for the 4.2 B6 and B7 S4. You will see the JHM tune has OVER 30wtq and 5whp over a tuned car. This is close to 40+ WTQ over stock from 1400rpm to 2500rpm. When you have 40wtq over stock your going to get a NOTICABLE difference over stock and when you first hit the gas the car is going to have much more pull. Keep in mind between 1800-2800 RPM is where most of us drive so this is getting our moneys worth.

The pedal sensitivity hasn't been changed the 40wtq has been added. most dyno sheets don't show below 2500rpm. The few I have seen shows this same to be true of the JHM tune with the large increase in power down that low in the RPM range. The throttle is a 1:1 raito. Anyone that has ever driven a carbarated hot rod knows what that means. IT means you move the pedal you get action. Most modern day cars are drive by wire. The computer take and adds in a small delay and makes it so you have to give it large amounts of throttle at low speeds. JHM removes the delay and makes the throttle 1:1

What has happened is the delay has been removed from when you move the pedal and when the pedal responds to you moving the pedal. This non waiting change with the added Tq gain can be a bit much for the driver that has never experienced this before. I have seen a few people without the JHM tune say they think this is an issue.. Not sure how people without a JHM tune can think something is an issue. I think what you need to know before you get a JHM tune is your adding a monster amount of power in the range you drive in 90% of the time. Here is a little example of what Im taking about











more 30whp 30+wtq




44wtq and 46whp
http://audirevolution.net/videos/124...and-after-dyno


I can keep grabbing more but you get the point.


So for those of you who are worried that this big tq gain and lack of delay is going to be too much what do you do.


1 reset your throttle body. The OEM throttle body can come out of alignment and it can be already more open then your requesting.
2 give the car a week to settle in on the tune.
3 know that your not going to have that same .9 of a second delay when you hit the throttle.
4 don't try to drive with a floating pedal. allow your leg to rest on the dash as this will keep your foot more solid.
5 know now that with so much more power you don't need to use the throttle as much. Lots of people say how they jump going over speed bumps.. I have never had this be an issue. There are just times when you don't need to give the car much if any gas. We have a low gear raito as it is. At slow speeds you really don't need to give the car that much throttle
6 check for vac leaks and make sure your MAF is good.
7 Also remember you now have a 1:1 throttle



perks. Almost everyone will say the BUT DYNO says more power. and thats true because the track numbers say it as well if the dyno results didn't do it for you.

While there are many good power gains the fuel gains are big as well. Your going to get better fuel mileage from the tune. As most of us have

for those excited guys there is the launch assist. Basically never done before. JHM decided to make a launchassist program for our cars when there isn't such a thing. So no matter how good or bad of a driver you are. You can always have top launching results
http://www.youtube.com/watch?v=w_oUZfv8xtA


there is a lot more to the tune then that. I just wanted to take a few min and put something together for the new guys who might not know and getting some answers would be helpful.

[Blackstallion]

like always great write up Justin

[v8a6]

great info

[ArcticAvant]

Hey Justin. Thank you for this. I'm sure JHM tune buyers will be reading that for a long time. I was wondering how the tune feels with an automatic? Does it effect shifting? Is it any quicker? How does the added power effect the shifting when in drive and driving normally? Also, when driving hard, when you let off throttle and then get back on it, I've noticed that the auto takes much longer than manual to accelerate. Is there much of a delay with the tune? Thanks Mate!

[Justincredible]

Thanks guys. seems there is a lot of miss information and some people who have been just making stuff up to help have an answer.

Hey Justin. Thank you for this. I'm sure JHM tune buyers will be reading that for a long time. I was wondering how the tune feels with an automatic? Does it effect shifting? Is it any quicker? How does the added power effect the shifting when in drive and driving normally? Also, when driving hard, when you let off throttle and then get back on it, I've noticed that the auto takes much longer than manual to accelerate. Is there much of a delay with the tune? Thanks Mate!

I don't want to let the cat out of the bag on this but JHM has been doing transmission tunes for our cars for a little while. I don't know what point there at talk wise but I am lucky enough to be part of the testing on this.

As for the automatic tune we get faster shifting in the JHM ecu change. We get the launch assist for the Automatic not the same as the DSG guys but its helpful. As for the off the throttle and back on. The TQ converter in the transmission has to unlock when you get off the throttle and there is going to be a small delay before it will lock up again. The JHM tune seems to have cut this down while giving the transmission more TQ from the ECU.

here is a automatic squeeling the wheels while having a little better shifting with the help of the JHM TCU tune
http://audirevolution.net/videos/140/jhm-b6-s4-vs-b5-s4


keep in mind anything I say is just from my understanding. Asking JHM is going to get the finial words. This is just what I understand and what I have seen in logs of my car and several others.

[Blackstallion]

Hey Justin. Thank you for this. I'm sure JHM tune buyers will be reading that for a long time. I was wondering how the tune feels with an automatic? Does it effect shifting? Is it any quicker? How does the added power effect the shifting when in drive and driving normally? Also, when driving hard, when you let off throttle and then get back on it, I've noticed that the auto takes much longer than manual to accelerate. Is there much of a delay with the tune? Thanks Mate!

I cant really answer your question as i had the headers installed prior to the JHM tune. Im sure justin can help you out with more honesty(even though he has headers and more) but I had GIAC and headers on my TIP. Once i got the JHM tune it woke up the car throughout the whole RPM band. The shifting was better but its hard to say because the low end torque on the headers were pretty crazy. I can say there was NO delay with the tune. Like i said before JHM tune woke the car up low and high end torque. Most tunes lack the low end...right now im currently driving a 6 speed(full exhaust) with APR tune and it feels like a pig when i accelerate. Its been said many times..no regrets going with JHM!

[jfunkey]

Good stuff justin. Also the jhm tune removes the tq limits. This allows you to break free the tires if you want to on a solid launch. I love the tune. I don't have any issues at low speeds and bave always enjoyed the instant throttle response.

[01northernS4]

As with many things in the B6 and B7 land we get new members that don't always get a chance to get the full read and full deal on the scope of several products.

While I know people are always looking for something new. JHM is the real deal. Many companys have tried to come with gimmks and cheep offers but JHM contently gives its users the BIGGEST gains with the largest experience. My car with full exhaust and a JHM Tune made 43wtq and 44whp over stock.

Its not preferred by 75% of the S4 guys because it doesn't work


http://www.audizine.com/forum/showth...ustomer-review


So I thought I would start with the tune as Ive been extremely happy and wouldn't get another tune other then JHM. Ive had my JHM tune for a long time and Its been threw the few free revisions that jhm has offered FREE to us the loyal customer.

The one big thing that you will hear from a very small group of people is the throttle. Lets stamp this one out of the way. Below is a simulated dyno of the JHM tune VS another strong tune offered for the 4.2 B6 and B7 S4. You will see the JHM tune has OVER 30wtq and 5whp over a tuned car. This is close to 40+ WTQ over stock from 1400rpm to 2500rpm. When you have 40wtq over stock your going to get a NOTICABLE difference over stock and when you first hit the gas the car is going to have much more pull. Keep in mind between 1800-2800 RPM is where most of us drive so this is getting our moneys worth.

The pedal sensitivity hasn't been changed the 40wtq has been added. most dyno sheets don't show below 2500rpm. The few I have seen shows this same to be true of the JHM tune with the large increase in power down that low in the RPM range. The throttle is a 1:1 raito. Anyone that has ever driven a carbarated hot rod knows what that means. IT means you move the pedal you get action. Most modern day cars are drive by wire. The computer take and adds in a small delay and makes it so you have to give it large amounts of throttle at low speeds. JHM removes the delay and makes the throttle 1:1

What has happened is the delay has been removed from when you move the pedal and when the pedal responds to you moving the pedal. This non waiting change with the added Tq gain can be a bit much for the driver that has never experienced this before. I have seen a few people without the JHM tune say they think this is an issue.. Not sure how people without a JHM tune can think something is an issue. I think what you need to know before you get a JHM tune is your adding a monster amount of power in the range you drive in 90% of the time. Here is a little example of what Im taking about











more 30whp 30+wtq




44wtq and 46whp
http://audirevolution.net/videos/124...and-after-dyno


I can keep grabbing more but you get the point.


So for those of you who are worried that this big tq gain and lack of delay is going to be too much what do you do.


1 reset your throttle body. The OEM throttle body can come out of alignment and it can be already more open then your requesting.
2 give the car a week to settle in on the tune.
3 know that your not going to have that same .9 of a second delay when you hit the throttle.
4 don't try to drive with a floating pedal. allow your leg to rest on the dash as this will keep your foot more solid.
5 know now that with so much more power you don't need to use the throttle as much. Lots of people say how they jump going over speed bumps.. I have never had this be an issue. There are just times when you don't need to give the car much if any gas. We have a low gear raito as it is. At slow speeds you really don't need to give the car that much throttle
6 check for vac leaks and make sure your MAF is good.
7 Also remember you now have a 1:1 throttle



perks. Almost everyone will say the BUT DYNO says more power. and thats true because the track numbers say it as well if the dyno results didn't do it for you.

While there are many good power gains the fuel gains are big as well. Your going to get better fuel mileage from the tune. As most of us have

for those excited guys there is the launch assist. Basically never done before. JHM decided to make a launchassist program for our cars when there isn't such a thing. So no matter how good or bad of a driver you are. You can always have top launching results
http://www.youtube.com/watch?v=w_oUZfv8xtA


there is a lot more to the tune then that. I just wanted to take a few min and put something together for the new guys who might not know and getting some answers would be helpful.

Hi Justin, great info... question for you... are these gains you are quoting for the 93 tune and if so how much less power can one expect from the 91 JHM tune... any other differences between the 91 vs 93?

Thanks!
Anthony

[EUROSWAGR]

Awesome post..just what some of the newer members needed!

Nice links, especially the bad ass Brilliant Red B7 dyno


Going from running 91 octane stock to a 91 JHM tune would probably net close to the same gains IMHO.

[dante18]

Great write up Justin... Thanks for putting in the time to drop some knowledge on the rest of us.

[karachy]

First of all, great writeup!
One more question though (couldn't find a solid answer using the search).
Is it ok to do the tune and leave the pre-cats in place (stock exhaust).
I'd like to get rid of the annoying slow response / torque down low (for example when pulling up quicker from a standstill)

(Asked JHM directly but I haven't got a response yet)

[martinm0]

First of all, great writeup!
One more question though (couldn't find a solid answer using the search).
Is it ok to do the tune and leave the pre-cats in place (stock exhaust).
I'd like to get rid of the annoying slow response / torque down low (for example when pulling up quicker from a standstill)

(Asked JHM directly but I haven't got a response yet)

Yes, its perfectly ok to get the tune on a stock cat-back and DPs (non-gutted). Their wording on the site is misleading in that regard, but I did the tune as a first step and it does open up the car quite a bit. You'll be pleased I'm sure!

[mgikone69]

i want more info on the TCU tune.......wish i lived in JHM land :-(

[x X CLoud X x]

nice writeup

[Justincredible]

Thanks guys.

The Pre cats are something that JHM and several others of us have found to be a big issues on these motors. Causing the biggest part of the damage to the motors. If your stock and never do 1 mod you should remove the pre cats. JHM obviously just suggests it as a way to help keep the motors safe and lasting a long time.

[yObOyGeo]

Question .. What does a stock 04 S4 hit for tq and hp on a dyno ?

[JimmyBones]

Question .. What does a stock 04 S4 hit for tq and hp on a dyno ?

That varies.

Mine was 260 for both.

[CdnaudiS4]

Thanks guys.

The Pre cats are something that JHM and several others of us have found to be a big issues on these motors. Causing the biggest part of the damage to the motors. If your stock and never do 1 mod you should remove the pre cats. JHM obviously just suggests it as a way to help keep the motors safe and lasting a long time.

Sorry for necro reviving but its funny you mention this... I was talking to a local shop about getting the JHM tune flashed onto my car and I was telling them about gutting the pre cats and their response just pissed me right off that I've decided to flash it myself lol They said and I quote " We deal with your kind of car (B7 S4) routinely and we don't recommend you do that as no one else has done that i'm not sure if you're just watching youtube videos" That part pissed me off... But anyways I haven't read one thread about keeping the pre cats in never mind if I'm removing it for power but just in general for the car...

[A4Maine-iac]

What surprised me is that someone has had the TCU tune for 4 yrs now!

[Jake@JHM]

What surprised me is that someone has had the TCU tune for 4 yrs now!

It has been a very long time project, lol.

[VR6OhMy]

Do you guys really recommend removing the pre-cats to extend longevity on the 4.2 Jake? I know there is a performance gain with removing the catalyst, but what are these cats doing to cause damage over the long term?

[CdnaudiS4]

Do you guys really recommend removing the pre-cats to extend longevity on the 4.2 Jake? I know there is a performance gain with removing the catalyst, but what are these cats doing to cause damage over the long term?

I don't know exactly why we "should" remove the precats for longevity besides flow to let it breathe better and power increases etc but all I know is that 9/10 threads I've read on piggies, its the BEST thing to do to these cars.

[EUROSWAGR]

I don't know exactly why we "should" remove the precats for longevity besides flow to let it breathe better and power increases etc but all I know is that 9/10 threads I've read on piggies, its the BEST thing to do to these cars.

In the BHF the precats are located right off the manifold and basically restrict flow right out of the motor. This causes higher temperatures in the head and may be a contributor to the issues that plague the BHF like cylinder scoring and warping. Obviously the other advantage on top of engine safety is more flow and performance.

[Quattrors4]

Hi Justin, great info... question for you... are these gains you are quoting for the 93 tune and if so how much less power can one expect from the 91 JHM tune... any other differences between the 91 vs 93?

Thanks!
Anthony

what a shitty torque curve
get a um flash

[EUROSWAGR]

what a shitty torque curve
get a um flash

Yuo don't even know what car this is for, dipshit...

So far every B6/7 S4 on Earth is faster than your RS4 with every setup you ever had..hit the strip or GTFO

[Jake@JHM]

lol

[dmill19]

Can someone tell me what all they put on the car for the full tune? I know I read it somewhere but can’t find it now!!! Thanks great freakin post

[kabukie]

Can someone tell me what all they put on the car for the full tune? I know I read it somewhere but can’t find it now!!! Thanks great freakin post

Ooooo yes me too!

[Mr.Wrong]

Piggies and a catback. Personally, I'd go for the fullback rightaway and skip piggies. 2.5" Fullback really opens up these V8s and makes them scream

[kabukie]

Piggies and a catback. Personally, I'd go for the fullback rightaway and skip piggies. 2.5" Fullback really opens up these V8s and makes them scream

Meant what all does the tune include? The requirements are spelled out on their site

[roboto_1337]

Reflash of the the stock ECU to the desired octane tune. Launch control. I believe that you can get them to program tune-stock switching through the cruise control. Also SAI delete if it’s blocked off.


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[Fourpoint282]

I’m confused, I thought JHM tune didn’t add torque...I thought it was just throttle response (and a few smaller things) or so I’ve read before. I’m thrilled to hear this is not the case


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[roboto_1337]

I’m confused, I thought JHM tune didn’t add torque...I thought it was just throttle response (and a few smaller things) or so I’ve read before. I’m thrilled to hear this is not the case


Sent from my iPhone using Audizine

It definitely adds more than throttle response. There are dyno sheets kicking around about the Tq and Hp gains. It transforms the car. Almost immediately blew up my stock motor mounts after the tune.


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[Rb.toytech]

Sorry for reviving this thread but I haven't seen an answer anywhere else.

I'm considering getting this tune for my 2005 S4 6mt. I have catless milltek dp's. I noticed there is an option for the tune to have Sai deleted. I haven't removed the Sai components but can I select in the tune to have it deleted to prevent future codes due to eventual component failure? Without cats the system is pointless but will I run into any issues if the components are still installed but it's deleted from the tune?

Also I hear a lot of people talking about engine mounts. I just had one out the other day to do the starter. It looked ok and I don't have any vibration from the engine. Can I expect they will just wear out quick with the tune?

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[mark_ma]

Sorry for reviving this thread but I haven't seen an answer anywhere else.

I'm considering getting this tune for my 2005 S4 6mt. I have catless milltek dp's. I noticed there is an option for the tune to have Sai deleted. I haven't removed the Sai components but can I select in the tune to have it deleted to prevent future codes due to eventual component failure? Without cats the system is pointless but will I run into any issues if the components are still installed but it's deleted from the tune?

Also I hear a lot of people talking about engine mounts. I just had one out the other day to do the starter. It looked ok and I don't have any vibration from the engine. Can I expect they will just wear out quick with the tune?

Sent from my SM-G950W using Audizine mobile app

I got the tune with the sai delete while I still had the system on. At the time I had catless downpipes. I did not run into any problem at all. The cool benefit is that it helps your mpg by a lil bit. When I had to do emission. I would remove my exhaust system and install the oem downpipes with the stock exhaust. And I still passed with the sai delete. Once I got home I would swap out the stock with my catless downpipes and my exhaust. When I did my timing i was then able to remove the sai system since the motor was out. And right now I’m running the jhm v2 headers and all is still running great with me


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[Rb.toytech]

I got the tune with the sai delete while I still had the system on. At the time I had catless downpipes. I did not run into any problem at all. The cool benefit is that it helps your mpg by a lil bit. When I had to do emission. I would remove my exhaust system and install the oem downpipes with the stock exhaust. And I still passed with the sai delete. Once I got home I would swap out the stock with my catless downpipes and my exhaust. When I did my timing i was then able to remove the sai system since the motor was out. And right now I’m running the jhm v2 headers and all is still running great with me


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That's awesome, exactly what I was wondering. I appreciate the info. Fortunately we don't have emission testing here so I won't have to do the swapping back and forth. I am going to hang on to my stock system though, maybe for when I sell it.

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[ZimbutheMonkey]

What has happened is the delay has been removed from when you move the pedal and when the pedal responds to you moving the pedal. This non waiting change with the added Tq gain can be a bit much for the driver that has never experienced this before. I have seen a few people without the JHM tune say they think this is an issue.. Not sure how people without a JHM tune can think something is an issue. I think what you need to know before you get a JHM tune is your adding a monster amount of power in the range you drive in 90% of the time. Here is a little example of what Im taking about

Unfortunately, that's what happens when you completely disable the ARMD (anti-jerk) functionality of the ECU... I tried that with my 6 speed, made the car virtually undrivable. Fortunately I found better tuning solutions that don't make the car into a jerking mess lol.

[mtwallace85]

Unfortunately, that's what happens when you completely disable the ARMD (anti-jerk) functionality of the ECU... I tried that with my 6 speed, made the car virtually undrivable. Fortunately I found better tuning solutions that don't make the car into a jerking mess lol.

Weird, I have no issues driving my car. Did you pick up a Dragy yet? Still interested in seeing what your car can do.

[jdmnomore]

Just proves amongst other things zimbu cant drive. Took me a short while but after about a month or so I was able to drive thr car like normal again. Having such a touchy throttle was awesome for pulls from a roll and such.

[ArthurPower]

Nice article much appreciated. I recently purchased a JHM/Fast Intentions cat-back exhaust and will be installing that along with piggies. After a lot of research I had already planned on a JHM tune. I learned a few new things I didn't know from reading your post and now I'm even more excited about getting this completed. :)