Stock Turbo Boost

[Esqueda_]

Hello Guys,
I'm planning on going for stage 1+ but before that I wanted to know what is my stock boost pressure so I ordered Autometer Boost gauge.
I just installed ir and also replaced DV with DV+.

I recorded a quick video and I was able to hit 18 psi on short acceleration.
My question is if this is normal for stock or perhaps it already has stage1?
I dont have vagcom to check..



Also I found thst some other times it wont even go over 5psi which makes me think I may have a leak...I will check over the weekend for hoses and connection to see if there's any problem.

Any insight that you can share will be great!
Thanks!


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[booost]

Stock should be around 15 psi. I would do a boost leak test.

[amz]

It's been a while since I've been in the 2.0T world (left for the 3.0T) but, from what I remember stock is 17, Stage 1 is 20psi, Stage 1+ is 21psi, and stage 2 is 24psi. These are the values my Podi gauge gave me when I went through the various stages of Unitronic tunes.

Edit: if I timed it just right, I could get a spike to 25psi.

[Esqueda_]

Great! Thanks for the prompt support
Ill be checking for leaks this weekend and will post how did it go.



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[AllroadCorbin]

APR claims the B8.5 Stage 1 tune will max out at 22-22.5 psi.

[B8_Jim]

http://www.audiworld.com/forums/a4-b.../#post23956704

circa 2010 B8 stock was ~13.5 psi, and APR S1 was ~22.

[A4x]

According to Torque app, my STOCK B8 hits 18-18.5 psi boost.

also according to that app, I run 7-7.5s 0-60. I was hoping my 0-60 time would be better.

I have Vagcom, but never got into recording boost, etc, but its on the to-do list. What do you think about the Torque app seeing 18.5 psi and 7s 0-60?? Normal?

[hyperunion]

According to Torque app, my STOCK B8 hits 18-18.5 psi boost.

also according to that app, I run 7-7.5s 0-60. I was hoping my 0-60 time would be better.

I have Vagcom, but never got into recording boost, etc, but its on the to-do list. What do you think about the Torque app seeing 18.5 psi and 7s 0-60?? Normal?

I do know torque app shows requested boost and not actual... Need the boost tap in manifold for actual...

[lettuce]

According to Torque app, my STOCK B8 hits 18-18.5 psi boost.

also according to that app, I run 7-7.5s 0-60. I was hoping my 0-60 time would be better.

I have Vagcom, but never got into recording boost, etc, but its on the to-do list. What do you think about the Torque app seeing 18.5 psi and 7s 0-60?? Normal?

18 psi stock seems a bit high to me, I swear I remember it being low to mid teens back when I was stock.

7-7.5 seconds 0-60 seems accurate though for a stock motor without launching it. Brake torquing up to about 2.5-3k RPMs in S-mode with ESP off and then punching it off the line should net you about a second 0-60 to bring it down to mid 6s which is what I believe most magazines quoted it at.

[goreckless]

I could swear stock boost is around 11psi. My stage 2 is around 22psi.

[A4x]

18 psi stock seems a bit high to me, I swear I remember it being low to mid teens back when I was stock.

7-7.5 seconds 0-60 seems accurate though for a stock motor without launching it. Brake torquing up to about 2.5-3k RPMs in S-mode with ESP off and then punching it off the line should net you about a second 0-60 to bring it down to mid 6s which is what I believe most magazines quoted it at.

I could swear stock boost is around 11psi. My stage 2 is around 22psi.

Amazed at the differences we are seeing in this thread. If 22psi on stage 2 is accurate, I think 18psi stock is reasonable. It's only a 50hp difference, which they probably achieve with boost increase and timing advance.

Don't S4s go from 11psi stock to 16psi stage 1/2? That yields them much more hp.

I am definitely reading consistent 18-18.5psi boost with the Torque app, and a generic OBD bluetooth reader from eBay. Perhaps the error is in the Torque app??

I tried brake torquing several times to 2.5-3k rpm in S mode, then gunning it, and that was NOT improving my 0-60 times. Maybe by a few tenths, but I can feel the car kind of bog down when I release the brake. It feels just as quick starting from idle (without brake torque). I don't like brake torquing, feels so bad for the drivetrain. Man, I wish I had a 6-speed manual

My car has 87000km, I thought she was healthy. Perhaps this weekend I will hookup the Vagcom (and research how to log boost) to see what kind of readings I get.

[AWDLover]

My stock boost was about 13.5. APR stage 1 would request ~18.5 when i did vcds logging. Had a p3 gauge also but it was reading through the OBDII. That was at 5280 ft above sea level

[Esqueda_]

Well I have new evidence..
I just did another short run from 5 mph and got 20s...
https://youtu.be/6iDMXTvm9Wc
Smh....how can I know if I have stock ecu or tuned?


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[Esqueda_]

I am 490 ft above sea level


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[AWDLover]

Smh....how can I know if I have stock ecu or tuned?

Take it to the dealer and see if they return it with a sweet TD1 code

You could call/email the tuning companies and see if your vin is in their system. I'd star with APR

[lettuce]

I tried brake torquing several times to 2.5-3k rpm in S mode, then gunning it, and that was NOT improving my 0-60 times. Maybe by a few tenths, but I can feel the car kind of bog down when I release the brake. It feels just as quick starting from idle (without brake torque).

It's not as easy as it sounds. It took me about a dozen or so tries to do it right on my own, and then another 2 dozen or so at the drag strip getting the timing right with the tree. It's a very noticeable difference.

My car isn't exactly stock, but here are two vids of me at the strip, one with a bad launch and one with a good launch.

Bad:
http://webm.land/media/vxKX.webm

Good:
http://webm.land/media/Do9p.webm

[Esqueda_]

Take it to the dealer and see if they return it with a sweet TD1 code

You could call/email the tuning companies and see if your vin is in their system. I'd star with APR

Im in Mexico, I hear more about Unitronic and another one that I dont recall right now..
Im waiting for my vagcom, is there any way to read with it if it has a different file than stock? At least it could give me an idea if theres something different or not...


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[A4x]

It's not as easy as it sounds. It took me about a dozen or so tries to do it right on my own, and then another 2 dozen or so at the drag strip getting the timing right with the tree. It's a very noticeable difference.

My car isn't exactly stock, but here are two vids of me at the strip, one with a bad launch and one with a good launch.

Bad:
http://webm.land/media/vxKX.webm

Good:
http://webm.land/media/Do9p.webm

Good videos, thanks. I can see a difference in the launch.

Can you try to explain the most difficult part, and how to get the car to launch well without bogging? Maybe I am not getting the rpm high enough, as I don't really enjoy the feeling of loading up the drivetrain but holding it all back with the brakes. I would like to get some nice launches though :-)

[lettuce]

Good videos, thanks. I can see a difference in the launch.

Can you try to explain the most difficult part, and how to get the car to launch well without bogging? Maybe I am not getting the rpm high enough, as I don't really enjoy the feeling of loading up the drivetrain but holding it all back with the brakes. I would like to get some nice launches though :-)

Basically you have to get the RPMs high enough to get to where you'll start making boost. I believe I get it up to around 2500 - 3k or so but I'm honestly not sure as I don't take videos of my tach and I'm too busy paying attention to the road/lights/tree and am just going off of feel/instinct. A few times I've either gotten it too high or didn't have my brakes pressed hard enough so I started to inch forward and that killed my launch.

If you're doing it too long I believe there is some kind of electronic/software protection mechanism in our cars because they seem to automatically cut out if the torque converter heats up too much and it'll drop your RPMs big time, again killing your launch. That's happened to me a few times. On the other hand if you don't do it long enough, you won't be spooling up your turbo at all and you won't be doing anything. This is probably what you're doing.

What I've found works best at the track after I'm staged is I jam down the brakes, pumping them a bit along the way to get them as far down as I can. Then I do a small preliminary rev and hold it at about 1.2-1.5k. Then when the first lights come on I gun it. With the tree lights I have 1.5 seconds after the first light comes on to when the green light comes on and I'm good to go, so I've found that that's the perfect amount of time for my revs to climb enough to spool up my turbo but not go too far and cause my car to bog down. Then when the green light hits I jump off the brake as fast as I can and basically just hold on for dear life.

I wouldn't worry so much about hurting your transmission. Unless you have preexisting transmission problems, a few torques and launches won't kill anything. Just don't do it at every stoplight every day and you'll be fine. I've done over a dozen launches at the track back to back to back within minutes of each other with no issues, and I'm pushing north of 300 ft lbs of torque at the wheels.

[A4x]

Good tips, thanks. Let me see what I can do!