Intro and N2O questions

B6/7 S4/RS4
#1

Whats up guys

Stumbled over here from AZ land after hearing there were more productive discussions about the JHM nitrous kit over here.

I see Jake@JHM is active over here, so that should be helpful too.

My car: 2008 B7 S4 Avant, Tip(yeah yeah… may convert in the Fall, unless JHM can sort out that Tip Tune soon!)
About 90k on the ticker.

Service: Timing service performed in the last 5k miles… pretty much everything except the chains got replaced.
Trans was serviced as well, new fluid and filter.
Oil changed every 5k with JHM’s Motul/OEM filter kit.
No unusual oil consumption or known service history issues

Mods: JHM Headers, Race Cats, FI Catback with resonators
JHM 93 tune
JHM LWCP
JHM LW Rotors, Hawk Street pads
KW V3 Coilovers, upgraded control arms all around with adjustable uppers
Apikol snub and rear diff mounts
034 RSB, and 034 HD motor mounts
OEM RS4 TI 19’s with 235/35 PSS tires

Plans: JHM manifold and TB is already sitting at the shop i use for performance instal work i cant handle.
Im on the verge of going for the Nitrous kit as well, and im looking for some feedback on few things…

        1.  Im not to thrilled about the idea of taking up half my trunk space with a bottle..  has anybody        successfully installed one in the spare tire area?  If so, are there any downsides to doing this?

        2.  I have done some reading on nitrous in general..  one thing i read is that its better to pulse the nitrous shot and ramp it up with RPM's..  does this happen with the JHM kit, or is just one big shot all at once?  Can somebody briefly explain the functionality of the remote bottle opener (i assume as its name implies that i would be able to open the bottle while driving) and if i need that or not?  Can the shop i have do the instal set the shot (75, 100 shot etc) or does it come pre set from JHM?

        3. JHM recommends a trans cooler with their SC kit i believe..  it recommended for this as well?

Appreciate it guys! Ill keep you updated on the build.


https://farm3.staticflickr.com/2884/13795667784_8c36f859cb_z.jpg
RI - Apr - 2014-2575 by dsgray16, on Flickr

-Dan

#2

Stunning looking car. Welcome I’d suggest starting your own thread so people can see your car and be more direct in answering your questions. This is indeed a much more technical and advanced group over here on Audirevolution.

#3

Thanks! I try to keep it looking less than 5 years old…

Is this not the best section to start a thread like this?

#4

This section maybe just not this post. You can create your own thread that introduces you your car and allows you to post questions that are specific to you. The nitrous questions would still make sense to leave here If you wish.

It’s up to you. Just offering friendly forum support ideas.

#5

No i appreciate it… im just confused… i did start my own thread. This is it… we are talking it in right now… hah

am i missing something??
???

#6

No you did it right I just thought I was in the other thread. I’m the idiot.

#7

lol… i was going back and looking at what i did and driving my self nuts trying to figure out what i screwed up! ok… now that i know im not crazy… any feedback on the n2o questions would be great. Also, if anybody has reasons to wait and go SC instead, let me know.

#8

Talk to wolfs4

#9

Welcome dsgray,

Your car looks great!

I’m running the JHM Nitrous kit on my 2005 S4 Avant automatic with 130k miles, so hopefully I can try and answer things. I just received my headers the other day, but haven’t installed them yet. You get just a little bit more kick out of the kit with headers vs. cat-less down pipes like I’m currently running. The kit is very well designed with a lot of thought put into it.

[quote]1. Im not to thrilled about the idea of taking up half my trunk space with a bottle… has anybody successfully installed one in the spare tire area? If so, are there any downsides to doing this?
[/quote]
Yes, I have, and it fits pretty well. It’s perfect stealth too. I have a couple shitty pics in this crappy thread, but could provide more if needed. http://audirevolution.net/forum/index.php?topic=1833.0

[quote]2. I have done some reading on nitrous in general… one thing i read is that its better to pulse the nitrous shot and ramp it up with RPM’s… does this happen with the JHM kit, or is just one big shot all at once? Can somebody briefly explain the functionality of the remote bottle opener (i assume as its name implies that i would be able to open the bottle while driving) and if i need that or not? Can the shop i have do the instal set the shot (75, 100 shot etc) or does it come pre set from JHM?
[/quote]
The kit comes with a nitrous controller. As far as I know it doesn’t ramp up. It just delivers the full shot. For us TIP guys, it will spray at 4k rpm and have to be basically full throttle, and it carries that to redline. It feels a bit like a turbo kicking in.

The remote bottle opener is convenient for impromptu use. I currently do not have one, but plan to install one in the future. You can’t exactly open the bottle and leave it open all the time. The system isn’t 100% sealed. You are talking about 600-1200 psi, and if you left the bottle open for 2 weeks or something it would likely be completely drained. So I always keep it closed unless I plan on using it.

The kit comes with 75 shot jets if I’m not mistaken. Which delivers around 100 whp. The jets are like little restrictions that control the flow to ensure you get a proper fuel to nitrous mixture.

[quote]3. JHM recommends a trans cooler with their SC kit i believe… it recommended for this as well?
[/quote]
I don’t believe this is necessary. More frequent trans fluid/filter changes would be ideal though.

#10

I will make a special guest appearance. I’m running the jhm nos kit on my auto b6 s4. I will have to search I did a exhaust thread with and without nos. Tested a few cat back options.

I also have a jhm tcu tune. Makes a big deifference. It’s not a must but it’s nice. Where are you located.

You can run a smaller bottle but the bottle holder is also the bottle heater. You can put the bottle in the spare tire spot but it won’t work with the wheel hub.

#11

Yes, I have, and it fits pretty well. It’s perfect stealth too. I have a couple shitty pics in this crappy thread, but could provide more if needed. http://audirevolution.net/forum/index.php?topic=1833.0

[quote]2. I have done some reading on nitrous in general… one thing i read is that its better to pulse the nitrous shot and ramp it up with RPM’s… does this happen with the JHM kit, or is just one big shot all at once? Can somebody briefly explain the functionality of the remote bottle opener (i assume as its name implies that i would be able to open the bottle while driving) and if i need that or not? Can the shop i have do the instal set the shot (75, 100 shot etc) or does it come pre set from JHM?
[/quote]
The kit comes with a nitrous controller. As far as I know it doesn’t ramp up. It just delivers the full shot. For us TIP guys, it will spray at 4k rpm and have to be basically full throttle, and it carries that to redline. It feels a bit like a turbo kicking in.

The remote bottle opener is convenient for impromptu use. I currently do not have one, but plan to install one in the future. You can’t exactly open the bottle and leave it open all the time. The system isn’t 100% sealed. You are talking about 600-1200 psi, and if you left the bottle open for 2 weeks or something it would likely be completely drained. So I always keep it closed unless I plan on using it.

The kit comes with 75 shot jets if I’m not mistaken. Which delivers around 100 whp. The jets are like little restrictions that control the flow to ensure you get a proper fuel to nitrous mixture.

[quote]3. JHM recommends a trans cooler with their SC kit i believe… it recommended for this as well?
[/quote]
I don’t believe this is necessary. More frequent trans fluid/filter changes would be ideal though.
[/quote]
Huge help, thanks!

Does the kit come with some type of fuel regulator shutoff? Another thing i have been reading is that one of the worst things that can happen your fuel injections drops off and you inject too much N2O vs gas…

From the sounds of it, id say i want the remote bottle opener.

Can you discribe the functionality… so you get to 4k RPM… the Nitrous fires automatically if the system is primed, or is that where the windo switch comes in??

#12

dsgray16 you did come to the right place.

Wolf and justin are about as good as it gets as they both have the kit. I’ll try to fill in what I can, as I had a little to do with the kit.

The JHM tune will shut the throttle and put the car into limp mode if the fuel pressure drops too much or the car goes too lean. When the throttle shuts the controller reacts by shutting off the nitrous delivery.

The remote bottle opener is just that. It’s a gear driven valve drive, that will open the bottle when activated. You can sit in the front seat and just flip a switch and open the bottle.

Here is a fun video with a little profanity
http://audirevolution.net/videos/101/jhm-b6-s4-vs.-2.7t-stage-4-rs6

The A6 was running more boost then 20 but that’s all we were able to say. The last run was with a full bottle.

Here is how it works, you turn on the bottle, you turn on the system and you turn on the controller. When you go WOT the system will activate, the system won’t deliver nitrous below 4k and it will shut off before you get to the rev limit. If you ever pull your foot off the throttle or pull back on the throttle a little, the nitrous will turn off till you go WOT again.

Even if the all the injectors were to fail at once (impossible) the JHM nitrous system delivers both nitrous and fuel. Doing this prevents there from ever being an issue and is one more level of protection. As an added extra, you have a fuel accumulator that has stored fuel, this assures you don’t have a situation where you don’t get enough fuel. There is one safety after another.

#13

So I guess the moral of the story is if you have nitrous, you likely drive a tip car? Tip Avant if you go by the first two. PRetty wild odds there.

#14

Pretty sure it’s a requirement. That’s why Jeffrey is having issues…he has a manual. I kidd

#15

hahahaha

#16

N2O has gotta be one of the best bang for buck mods. I’m guessing conversion to the rs4 is a lot of work and therefore unavailable?

I think it’s hilarious in a good way with these family wagons hiding the bottle in the trunk lol. What a sleeper

#17

I know it might be a taste ricer but I’d want everyone to see if I had a bottle in my wagon.

#18

This sets my mind at ease and answers all my questions… thanks!

Kit got ordered today… went with the remote opener as well.

Ill be adding the ported manifold at the same time, so it should be a real nice jump in power. Im supposed to be hitting a dyno in Aug with a few people, so i should be able to report some real numbers back.

Ill update in a couple weeks when the instal starts.

Thanks again guys!

#19

LOL - not quite a sleeper if you show it off. :wink:

#20

It would be interesting if you did before and after dyno runs. I think we’d all be curious as to those numbers.