Another JHM Tuned S6 in the 12s

I am confused. I was planning to gut my cats in August and get a revised tune for such. I live where no smog is required.

I was under the impression that the stock headers without cats would provide substantial gains. Is this not true or are your custom headers required?

Or would the gains with the custom headers vs stock gutted headers simply be more? I am satisfied with gaining “50whp” and saving 3 grand vs custom headers and gaining “70whp” (for example)

Are the current “stock” headers designed for the correct pulsing design as you mentioned above?

I read all of the responses and I get it.
A tuning here in Denmark starts at the same price, so it not the pricing. It’s just the fact that if anything would go wrong, I no where near JHM headquarters.

But that being said you guys have me tipped, and I’ll go with a JHM tune. :blush:
I’ll definitely contact the V10 team regarding my questions, as the guy on messenger didn’t seem to have the answers I was looking for … maybe I just ask unusual questions :man_shrugging:t3:

I get both sides of the story.
The thing that makes it more difficult for me to compare is the 1/4 mile issue.
It’s not that our local tuners are not willing to give it a shot… we don’t have any drag strips in europe easy as that.
On the other hand i can’t begin to feel these times since I have zero experience with drag racing.

So here we go by the feel of the car and the dyno.
That said, I see the substantial gains in the tuning that is done by JHM. And i get the point why they focus on track times too, but it would be nice to see both.
Track times to back up the dyno figures since you can’t mess with track times.

About the YouTube vid in the facebook post…
The biggest complaint I read there was claiming a 100WHP gain based on a single dyno is a bit hard to back up since there is no refference before the tuning of the car. This would be the easiest way just a dyno sheet before and after the tuning of the same car.

I believe in the abilities of JHM and i’m not here trying to get involved in an endless argument. They may well be the best out there for these cars (can’t tell for sure since i’ve never driven a tuned s6 JHM or other company…) but still it should be possible to compare and question eachother.

And in my opinion we should celebrate the fact that others are trying to build headers and tuning and everything as well. After all we are here for the same thing faster v10’s…

@Robocop - I think that is the biggest issue most people don’t know what their talking about

@laketahoequattro - headers make a different power curve than the gutted manifolds. I think there is about 30whp more. But someone tried to make their own headers and only ended up with the exact same power as they had on the gutted cats. So as far as headers go there is obviously some science to it.

@Kimovitzh I think overall since JHM tunes cars all over the world and their obviously still supporting this car it would make sense to just email the v10 tech line email.

@dzow - The no drag strip part is just lazyness. With all kinds of cheap P box type of devices out there now. There is no excuse as a straight flat road is all it takes.

The feel of the car is all that really matters. Did the car change. Did the tune give a better customer end experience. Since no two dynos are the same and so many of the results have been manipulated it’s better to go off something that clearly can’t be manipulated. Since so many companies used dyno sheets and abused them for marketing gain they have reduced their own value and personally. I could care less how much or little the dyno says. I paid for my car to be faster and feel faster. Not for a dyno sheet.

The youtube facebook people are just stupid and this also says why we don’t care about a dyno. In one breath people want to see dyno results but then you show dyno results and if they don’t like them they apparently cry about it without asking questions.

I don’t understand your comments. But I think its people on FB that literally have ZERO clue about the project or what went into it.

In the video they are just showing the car on the dyno doing a few pulls for the fun of it and a pull away. That car and a few other cars were tested stock before any work was done and then again after they had the full work done headers exhaust tuning etc. This wasn’t the only car that has had this work done. Either way the results were the cars 100% stock then months later after the work was done. Since this video isn’t some sort of sale video or promotional video it was just a video of the work that was done to the car and the end of the project.

As for the complaints on the FB about the videoI think in the end it’s just a bunch of people that don’t know what they are talking about talking about a video that they don’t know all the details of and then whining about it.

I agree. we have a lot of really excited people who love the car and are not interested in drama but interested in great developments for the platform. It’s great IMO that JHM is even giving this platform the time of day still. . May the drama queens stay in their cry castle.

I was looking in to buying the draggy do you have any experience with that?
It looks legit when looking through YT

I agree. We have our differences on this site but no one is throwing accusations or bitch about anything.

We all have the same car, and essentially the same goal.
“10/10 - would recommend” is what comes to mind when thinking about this forum!

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I have a dragy module. It gives pretty consistent back to back results (often within a couple 1/100ths in the 1/4) if you use the same stretch of road (in the same direction) to test on all the time.

Thanks for the clarification. I’m looking forward to seeing these gains when I install my test pipes!

Iirc “dont mark my words” CV said we can rev these slush boxes to 7200 up from 7000 stock. Is the stock box capable of running higher than 7200, maybe 7500 rpm?

Curious what the fail point of the trans would be at this rpm or if it could be built to accommodate higher rpm

Any idea how the driveshaft, diff and axle shafts compare to the RS6? Does the RS6 use a different transmission? Curious if there is a weak link in the transmission of after it since we are now tuning the engine and transmission to throw a lot more power to these components.

I read that the RS6 trans has a more robust trans to handle the torque reliably, but you can always buy internals from on of the guys making the built RS6 trannies. They’re definitely not cheap, but if you end up going big on power (built motor, supercharger, etc), it’s probably a must have.

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@eng92 I would love to try it. So I’ll put that on the wishlist.

Has any one here tried the “drag mode” in VCDS?
Never tried it on the S6 but I did have a go at it in a Passat once.
I guess with the correct wheel diameter typed in it should be somewhat accurate.

Hi Everyone,
It has been awhile since I have been on here.
The custom manifolds are the way to go!! My car is running very strong for the last three years.

Updates from test n tune today. Finally had a nice sunday to get the car back out there now that the cats were removed and catback done. Right after the exhaust mods were completed i had a pcv go bad and after that took care of fixing a bunch of vaccuum leaks which has it running insanely strong. Added a set of OZ wheels to the mix as the old stocker could no longer balance out.

Still full interior minus spare. Only weight reduction are wheels and brake rotors. Also still running the standard JHM Flash fot catted setups. We have not updated or tried to eek out anymore power yet with it. CEL is on for catalysts as well as secondary air injection which was removed when motor came out.

DA was 1445. Im sure with cooler fall air come november we can knock on 11s doors. Next plan is to do a set of coilover and lower the car to help reduce drag. Maybe a lightweight battery

Hopefully the pictures upload. I have videos too just waiting to waiting for a friend to send them


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Great work. So many are looking to see the full potential of the 5.2 thanks for being on the front line showing what can be done.

That’s OBVIOUSLY the WORLD RECORD. JHM Tuned S6 12.57@110 thats moving.

Here are the performance numbers for a 2009 R8. It’s the 4.2 but still

List price $109,000
Price as tested $109,000
Curb weight 3580 lb
Engine 4.2-liter dohc V-8
Transmission 6-sp
Horsepower, bhp @ rpm 420 @ 7800
0–60 mph 4.0 sec
0–100 mph 10.1 sec
0–1320 ft (¼ mile) 12.5 sec @ 113.2 mph
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I know its not the same but its similar. Guys in europe running 1000hp on stock rs6 motors and trans. I feel we’ll get close i really feel this motor and platform has so much potential especially once boost is introduced.

Also if I had that 3500lb weight figure id comfortably be in the 11s lol

Props man! Like seeing that figure for sure. I run a super lightweight Northstar agm battery it is about 3/4th the size and half the weight. Same power specs

Wow, great numbers!

Was able to get my S6 to the strip today hoping to improve on my last 12.57 @ 110 run. Did not change anything like i hoped i would but the weather was beautiful and much less humid and the car drives hard when the temps drop so figured id be able to improve on my PB. First pass clicked off a 12.49 @ 111, backed it up next pass with a 12.50 @ 110. I still have coilovers and lw battery i want to do as well as get tuned for being catless. Im sure we’ll be knocking on 11s doors by November when temps really begin to drop.

Still full weight minus spare.

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WOW. That is really getting after it. This is again a fantastic working example of what good parts good maintanence and good track prep will do.

King demetrius…

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Nice!

Yea you could have a “100lb” jockey drive and loose some more weight lol. 1/8 tank of gas

What tires and psi are you running?