Project Audi V10 5.2 Performance S6 / S8

[v8a6]

Awesome update !!!

[c.scott]

Great update, and I echo those sentiments! Mine was one of the first (probably the 2nd or 3rd) S6 to get the tune, and the results are incredible. It’s a different car. Dollar for dollar, you’re not going to beat this product with any other upgrades. After you get your car up to par with any deferred maintenance, the first thing you should do is the tune, because quite frankly anything else you do won’t make much difference until the tune allows the car to fully utilize your other upgrades.

[c.scott]

Question - have there been any updates in the tune recently? My tune has been in for about 7 months now, so if there’s a “latest and greatest” I’d love to hear what changed and if I should look into getting it flashed again. Thanks!

[jpw12]

Very nice to ear about this performance parts very nice JHM !, one question , have you test with de-cat pipes? any info regarding the headers? does the tune adjust for better fuel , over here 102 oct ron or 96-7 mon its the best fuel you can get ( What I use on my cars) .
Thanks In advance.
Regards and keep the excelent work.

[SIX6SIX]

It’s been a few min since my last update so I wanted to get back with an update.

I’ll post a quick update and then like to get some feedback from the great guys on here about where to take the car direction wise.

Here is where I basically left off.

PS, 13 days now since the 1/4-mile video with a “to be continued” for timeslips… poke poke poke

13 days was a long time. Let me know if this makes up for it.

http://audirevolution.net/videos/185/worlds-fastest-aud-5.2-s6-s8-v10

Also, there are some S6 JHM tuned results as well. We’ll have to wait for them to post their results. But right now, as it stands, the worlds fastest S6 5.2 V10 and S8 5.2 V10 are JHM Tuned.

I’ll make a post later talking about my thoughts on the tune. I just wanted to get this up for everyone to see.

For those of you who don’t have the JHM tune but have been reading about it. The JHM tune can only be explained by simply saying there is in my opinion and based off performance figures, there is no equal. Anything less than the JHM tune for your V10 5.2 is just a waste of money. This has been talked about over and over so I’ll let the performance speak for itself.

My thoughts on the JHM tune are as follows. Overall, if you love the V10 sooner or later you will come to terms that something is missing and that something, is the real power of the V10. You can tell the OEM tune is holding the car back with the JHM tune your 5.2 V10 is unleashed. I can’t express enough how no other tune out there will offer what the JHM tune does.

Let’s break it down like this.

Throttle response.
OEM - lazy there is a bit of a delay it’s never quite crisp like you would like to see. It’s definitely a detuned luxury feel.

JHM - The best way to say it is crisp. The throttle is in sync with our throttle placement. The delay is removed and now the full power of the V10 can be managed fully by the throttle.

Power & Delivery
OEM - Down low the car sluggish. While the motor still makes power its buffered enough to keep the car from really getting off the line or accelerating quickly at low speeds. but wakes up in the upper rpm range to give you a nice constant smooth acceleration.

JHM - This ties into the throttle response a bit but zero restriction down low. There is an abundance of power now available at lower throttle input. The lower part of the rev range that was once powerless on the OEM tune now has a full load of power to deliver. This is all of the TQ this nice size 5.2 can make so down low this isn’t just a little difference it’s a marked improvement so much so that you’ll find yourself needing to use less throttle than before to get the car up to speed. In the upper rpm’s where the car really shined last time now the car has a more confident full and power feel where you can really keep increasing the cars acceleration with every inch of the throttle input.

From a data log standpoint, you can really see what the JHM tune is doing. You can see JHM has turned off the lower closing of the port flaps. Closing, of the flaps in the OEM tune, kills down low power but there is more. When you give the car more throttle you see the throttle plate move in direct line with the ignition timing, the fuel and most importantly the camshafts. The combination of all this is something that’s clearly not be offered in other tunes for the 5.2 V10.

Saftey

OEM - tune offers a wide range of safe items that turn on your warning lights on the dash

JHM - I know this isn’t really sexy but there are lots of unique little issues that our cars have and the JHM tune makes sure to put a spotlight on those issues sooner than later with error triggers that pop up sooner than later. The power is great but the ability to keep the car safer is even better.

Fuel mileage

OEM - I was seeing about 19 on average

JHM - I was seeing about ~23 on average. Keep in mind this also included the cat back exhaust so I figure the tune is good for about 2 or 3. Some guys are seeing more.

Exhaust note.

OEM - Nice but still subdued

JHM - First start of the car on the JHM tune and you know something good is about to happen. In the middle and higher rev ranges, you can really hear the car breathing better and the exhaust tone reflects it. Really helps give the car that more exotic sound

Overall thoughts.

If you’re a V10 5.2 owner this is a must have. The JHM tune really ties in every aspect of the V10s potential. This is what you expected the V10 to be and to offer. The performance isn’t even matched by doing anything else. When you look at the acceleration times of the past tune offerings people were not able to be much faster than stock 0-60 and the 1/4 mile results were sad. Now you have 12-second capable car with the JHM tune before the JHM tune the best tune offerings for the 5.2 V10 could barely get into the 13-second range.

That is my thought on the JHM tune. A worth the money get and something that will really help make you love the 5.2 V10 all over again.

round of applause

This is the most comprehensive review so far and I cannot agree more. Thanks for taking the time to write this. Now if only i could find a gopro to borrow lol

[SIX6SIX]

Very nice to ear about this performance parts very nice JHM !, one question , have you test with de-cat pipes? any info regarding the headers? does the tune adjust for better fuel , over here 102 oct ron or 96-7 mon its the best fuel you can get ( What I use on my cars) .
Thanks In advance.
Regards and keep the excelent work.

I think if you ask JHM they can have the tune customized to match your fuel options.

[CountVohn]

Very nice to ear about this performance parts very nice JHM !, one question , have you test with de-cat pipes? any info regarding the headers? does the tune adjust for better fuel , over here 102 oct ron or 96-7 mon its the best fuel you can get ( What I use on my cars) .
Thanks In advance.
Regards and keep the excelent work.

The tune adapts up several points in fuel quality and the tune adapts for the more open flow of the headers. You can email the V10@jhmotorsports email and ask them more. If you already have the JHM tune and can provide them logs I think they’ll make updates for your fuel quality for a small fee. Other changes like SAI off and other options I believe are available.

As for the headers. That is the crossroad I’m at. Do I sent my car to JHM for the stage 1 supercharger Beta program or pull my motor and build another set of headers for my car.

I’ll update where my car is at currently, in the next few days looking to get some feedback from the members on what they think is a good direction.

[v8a6]

As for the headers. That is the crossroad I’m at. Do I sent my car to JHM for the stage 1 supercharger Beta program or pull my motor and build another set of headers for my car.

That is the easiest decision ever !!! The answer is completely obvious.

Of course, you must do both

[jpw12]

Very nice to ear about this performance parts very nice JHM !, one question , have you test with de-cat pipes? any info regarding the headers? does the tune adjust for better fuel , over here 102 oct ron or 96-7 mon its the best fuel you can get ( What I use on my cars) .
Thanks In advance.
Regards and keep the excelent work.

The tune adapts up several points in fuel quality and the tune adapts for the more open flow of the headers. You can email the V10@jhmotorsports email and ask them more. If you already have the JHM tune and can provide them logs I think they’ll make updates for your fuel quality for a small fee. Other changes like SAI off and other options I believe are available.

As for the headers. That is the crossroad I’m at. Do I sent my car to JHM for the stage 1 supercharger Beta program or pull my motor and build another set of headers for my car.

I’ll update where my car is at currently, in the next few days looking to get some feedback from the members on what they think is a good direction.

Thanks for the answer Mr Vohn .

Regarding to your question , I think you shoud finish the n/a route and see where the performance go first , If its posible to get over 110 mph in the 1/4 on the s8 that would be perfect , that means
You have left wheels and header… that probably its good for 3-4 mph more following the logic on the s4 v8 proyect, but maybe here the gains are more since you dont have the cats out yet…
Regards.

[SIX6SIX]

Very nice to ear about this performance parts very nice JHM !, one question , have you test with de-cat pipes? any info regarding the headers? does the tune adjust for better fuel , over here 102 oct ron or 96-7 mon its the best fuel you can get ( What I use on my cars) .
Thanks In advance.
Regards and keep the excelent work.

The tune adapts up several points in fuel quality and the tune adapts for the more open flow of the headers. You can email the V10@jhmotorsports email and ask them more. If you already have the JHM tune and can provide them logs I think they’ll make updates for your fuel quality for a small fee. Other changes like SAI off and other options I believe are available.

As for the headers. That is the crossroad I’m at. Do I sent my car to JHM for the stage 1 supercharger Beta program or pull my motor and build another set of headers for my car.

I’ll update where my car is at currently, in the next few days looking to get some feedback from the members on what they think is a good direction.

Please oh please get the supercharger…

[justincredible]

As for the headers. That is the crossroad I’m at. Do I sent my car to JHM for the stage 1 supercharger Beta program or pull my motor and build another set of headers for my car.

That is the easiest decision ever !!! The answer is completely obvious.

Of course, you must do both

I believe its a civic duty to do both. I would like to see the headers first and a few runs at the track. I think the headers would put you into the 12.5 range or better with a 110mph. I picked up a good amount of MPH when I did the JHM headers on my 4.2 S4

[JimmyBones]

I think that he should do headers and then the SC. If I had time then I would come up there and help with the headers.

[rocman]

I think i’d go with headers first, then SC.

[Nordy1865]

Headers, Headers, Headers…

[vtgt]

Headers then blower.

[CountVohn]

Well, the choice seems clear now. I think it makes sense for me to pull myself off the beta list for now for the JHM supercharger. I wanted to get my car from the 12s into the 11s by the end of this year and the JHM supercharger kit would have put me well into the 11-second range.

The good news is that me taking myself off the JHM supercharger list opens up a spot for another Audirevolution S6 guy to get on the JHM beta supercharger list. So tell your friends ;D

I think it makes more sense for me to let someone else take my spot and since the JHM beta supercharger program only lets in so many customers and the V10 program is growing with so much excitement, I want to see the platform continue to grow.

Here is where my car is at. Last year after blasting the low 13second pass I felt great but really felt like the car was still choked off somehow. luckily the JHM tune popped up a lean code for the car that led me on a chase to find out what the issue was. I wanted to slowly learn what I could so, I took my time and did as many logs as I could and spent as much time as I could to learn more about the car and how each system worked.

I knew it was going to be injector related as let’s face it. Everyone one of us has had to replace an injector or more. we are starting to see just how big of an issue injectors are on our cars. I actually talked about this here in this post.
http://audirevolution.net/forum/index.php?topic=3950.msg114965#msg114965

So, what I found out was that my injectors were definitely holding the car back. I asked a local friend (Justincredible) to come by and help get as much data as I can. The issue was definitely getting worse and we spotted an anomaly that could have been in part why some in the past have had damaged cats that required replacement. Seems one of my injectors was actually leaking. It took a long time to find this and figure it out. The cost of all the logging and time to see how bad injectors effect the car and what can happen when you drive around with a leaking injector. It took out my primary 02 on bank 4. The bad news is if you want to replace that 02 you need to drop the motor.

After knowing that headers are the obvious choice. Now I’ll start gearing up for dropping the motor and building the headers for the car. The entire process will take several months and I would like to see the car back on the road just before the track season ends in November.

Before we get into that I think my next post should be about the injectors and what we learned from testing. I’ll tell you what. If you haven’t had your injectors tested or replaced. It’s not a bad idea to consider doing so.

I got with JHM and they’re testing injectors at 110bar, cleaning the injectors and testing them again at 110bar. That is so important, as I’ve not seen any other company even those that offer cleaning services actually testing them at 110bar. The other injector cleaning and testing companies only test at about 5 bar some might get up to maybe 10 bar but my injectors didn’t even show a leak until 30 bar. So conventional testing methods outside of what JHM is doing wouldn’t have even shown a leak and the leak is what caused the damage to my 02 sensor leading to me now needing to pull the motor.

My next post will be the testing results I got back from JHM and some pictures of the injectors after I removed them.

[jpw12]

Its the most sense thing to do… very very tempted in buying a s8 now , very nice car but with a big lack of performance now thing has change.
Regards.

Pd Where or who Do I have to contact for the header?

[SIX6SIX]

Well, the choice seems clear now. I think it makes sense for me to pull myself off the beta list for now for the JHM supercharger. I wanted to get my car from the 12s into the 11s by the end of this year and the JHM supercharger kit would have put me well into the 11-second range.

The good news is that me taking myself off the JHM supercharger list opens up a spot for another Audirevolution S6 guy to get on the JHM beta supercharger list. So tell your friends ;D

I think it makes more sense for me to let someone else take my spot and since the JHM beta supercharger program only lets in so many customers and the V10 program is growing with so much excitement, I want to see the platform continue to grow.

Here is where my car is at. Last year after blasting the low 13second pass I felt great but really felt like the car was still choked off somehow. luckily the JHM tune popped up a lean code for the car that led me on a chase to find out what the issue was. I wanted to slowly learn what I could so, I took my time and did as many logs as I could and spent as much time as I could to learn more about the car and how each system worked.

I knew it was going to be injector related as let’s face it. Everyone one of us has had to replace an injector or more. we are starting to see just how big of an issue injectors are on our cars. I actually talked about this here in this post.
http://audirevolution.net/forum/index.php?topic=3950.msg114965#msg114965

So, what I found out was that my injectors were definitely holding the car back. I asked a local friend (Justincredible) to come by and help get as much data as I can. The issue was definitely getting worse and we spotted an anomaly that could have been in part why some in the past have had damaged cats that required replacement. Seems one of my injectors was actually leaking. It took a long time to find this and figure it out. The cost of all the logging and time to see how bad injectors effect the car and what can happen when you drive around with a leaking injector. It took out my primary 02 on bank 4. The bad news is if you want to replace that 02 you need to drop the motor.

After knowing that headers are the obvious choice. Now I’ll start gearing up for dropping the motor and building the headers for the car. The entire process will take several months and I would like to see the car back on the road just before the track season ends in November.

Before we get into that I think my next post should be about the injectors and what we learned from testing. I’ll tell you what. If you haven’t had your injectors tested or replaced. It’s not a bad idea to consider doing so.

I got with JHM and they’re testing injectors at 110bar, cleaning the injectors and testing them again at 110bar. That is so important, as I’ve not seen any other company even those that offer cleaning services actually testing them at 110bar. The other injector cleaning and testing companies only test at about 5 bar some might get up to maybe 10 bar but my injectors didn’t even show a leak until 30 bar. So conventional testing methods outside of what JHM is doing wouldn’t have even shown a leak and the leak is what caused the damage to my 02 sensor leading to me now needing to pull the motor.

My next post will be the testing results I got back from JHM and some pictures of the injectors after I removed them.

How much was the cost for the kit? I’m not on the west coast, but I’m pretty sure that I’ll want to supercharge eventually.

[compugeek5150]

If I read this right, JHM is offering injector cleaning now?!

[Nordy1865]

Hmm. Supercharger… tempting.