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Author Topic: Project Audi V10 5.2 performance. S6 / S8  (Read 8615 times)
justincredible
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« Reply #25 on: September 04, 2017, 07:35:19 PM »

I know you posted this in the S6 section originally but this is a great read. Thanks for all your work on this.
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SIX6SIX
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« Reply #26 on: November 28, 2017, 10:58:35 AM »

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  Grin

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.
Forgot about this... We should get the data on audi/VW use from EFT over the next few days, but I believe the fuel system component has proven to eliminate and prevent future carbon buildup. I have units in hand now. May need to get another one for you and Jimmy to test alongside my car(s).

Sent from my SM-G955U using Tapatalk
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C6 S6 - Silver

JHM Catback, JHM Tune, JHM IS, JHM LW CP, updated IM, all OEM Audi Exclusive Black Optic Pkg CF parts, OEM RS6 CF Grill, CF Side Blades, CF Fuse Boxes, CF Rear Center Console, CF B Pillars, ECS CF paddle shifters, CF CC's, CF mirrors

B6 S4 - Silver

sh*tbox (under construction
justincredible
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« Reply #27 on: November 29, 2017, 04:23:31 AM »


Forgot about this... We should get the data on audi/VW use from EFT over the next few days, but I believe the fuel system component has proven to eliminate and prevent future carbon buildup. I have units in hand now. May need to get another one for you and Jimmy to test alongside my car(s).

Sent from my SM-G955U using Tapatalk

I don't know what exactly your talking about here but the fuel system has little to nothing to do with the actual carbon build up. The build up in the intake and intake valves comes from the crank case PVC system and oil mist getting in the intake track at low speed idle conditions where the oil separator isn't working at peak efficiency.

On the FSI cars. The injectors are post intake valve so much unlike older cars you don't get fuel wash keeping the valves clean. To combat and fix this carbon issue Audi is now using a pre valve LP injection system to once again fuel wash the valves.

If there was a fuel component issue with carbon you would see the exhaust valves with carbon build up and you don't see that.
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bigserve134
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« Reply #28 on: January 08, 2018, 04:08:06 PM »

Love it CV! This stuff makes me want to change professions
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Deep Sea Blue (Dipped Satin Red) S5 | APR Stage III | JHM Stage 4 clutch | JHM LW Flywheel | Renn Motorsport RS-51 19x9.5 ET35| Michilin PSS 275x30 | KW V2 | JHM Test pipes | AWE down pipes + non-res catback | JHM SS | JHM LW rotors | Hawk Street pads | Lumar 20% | vag-com | G2 yellow
SIX6SIX
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« Reply #29 on: February 20, 2018, 01:57:05 PM »


Forgot about this... We should get the data on audi/VW use from EFT over the next few days, but I believe the fuel system component has proven to eliminate and prevent future carbon buildup. I have units in hand now. May need to get another one for you and Jimmy to test alongside my car(s).

Sent from my SM-G955U using Tapatalk

I don't know what exactly your talking about here but the fuel system has little to nothing to do with the actual carbon build up. The build up in the intake and intake valves comes from the crank case PVC system and oil mist getting in the intake track at low speed idle conditions where the oil separator isn't working at peak efficiency.

On the FSI cars. The injectors are post intake valve so much unlike older cars you don't get fuel wash keeping the valves clean. To combat and fix this carbon issue Audi is now using a pre valve LP injection system to once again fuel wash the valves.

If there was a fuel component issue with carbon you would see the exhaust valves with carbon build up and you don't see that.

I'm so late seeing this lol. Sorry, I'm almost never in the S8 forum. Yeah, I know. Apparently they resolved it through optimized combustion. But that's me, a layman, explaining lol. The engineer(s) could do a much better job. I can shoot you the data on hand if you PM me your contact details.
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C6 S6 - Silver

JHM Catback, JHM Tune, JHM IS, JHM LW CP, updated IM, all OEM Audi Exclusive Black Optic Pkg CF parts, OEM RS6 CF Grill, CF Side Blades, CF Fuse Boxes, CF Rear Center Console, CF B Pillars, ECS CF paddle shifters, CF CC's, CF mirrors

B6 S4 - Silver

sh*tbox (under construction
Greg5OH
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« Reply #30 on: February 21, 2018, 01:28:42 PM »

optimized combustion still will not help a poorly designed PCV system. This is solely upon the vent engineers shoulders to design an appropriate crankcase breathing system for the engine.
The combustion engineer just has to then deal with the oil mass entering the chamber and ruining his perfect combustion model!
« Last Edit: February 21, 2018, 01:33:09 PM by Greg5OH » Logged
smith6
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« Reply #31 on: September 18, 2018, 02:11:13 PM »

Mods can you pin this thread to the top and close it?
Really good / essential stuff in here, great for the new and old alike.
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