Author Topic: MBC and Bigger Injectors = Turbo  (Read 9782 times)

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DenverPat

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« Reply #30 on: February 01, 2005, 03:04:04 PM »
Hell, I hope the tuner knows what he's doing.  He was instrumental in the design of the 1.8T!
"Of all the extreme sports I've ever participated in- windsurfing, kite boarding, wake boarding, tow-in surfing and snowboarding- skiing, for me, made everything else easy."
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Rusty

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« Reply #31 on: February 01, 2005, 03:07:04 PM »
Quote from: "Denver Pat"
...just click here:
http://forums.audiworld.com/rockymtn/msgs/32563.phtml
then on the small 7507 in blue.  Scroll down to the bottom.

OK got it.  I have the current info.
i]AEB Engines have better-flowing heads and a real throttle cable...[/i]

Rocky Mountain Club B5

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« Reply #31 on: February 01, 2005, 03:07:04 PM »

Rusty

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« Reply #32 on: February 01, 2005, 03:19:18 PM »
Quote from: "Denver Pat"
Hell, I hope the tuner knows what he's doing.  He was instrumental in the design of the 1.8T!

Actually, the fact that it's taking 21 lbs of boost to get your numbers explains some things.  21 lbs of boost with adequate fuel should easily break 200 WHP.

One way to get around the 210cc/16.32 limitations is to retard the living sh*t out of the timing, and crank the boost way up.

We can test this theory.  Do a 2000-redline WOT run in 3rd gear, logging block 011 and 020.  Go ahead and log block 002 while your at it.  This will give us injector on-time, timing, and individual cylinder knock retard.  We can then compare yours and mine.

That's blocks 002, 011, and 020.  3rd gear WOT from 2000 to redline.
i]AEB Engines have better-flowing heads and a real throttle cable...[/i]

jayryan

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« Reply #33 on: February 01, 2005, 04:23:49 PM »
Just for the record, quoted from Electron Man, this what I was trying to say...it was in my head at least...sorry :roll: I'll have to think of some way to redeem my lost diginity...

"MAF sensor signal and engine rpm are used to calculate a "pseudo-charge pressure" figure which the ECU compares to values in a table. If the air flow number is too high for a given engine speed (an operating condition that must exist under high boost) the ECU gives you a DTC."
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Rusty

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« Reply #34 on: February 01, 2005, 06:00:58 PM »
Quote from: "jayryan"
Just for the record, quoted from Electron Man, this what I was trying to say...it was in my head at least...sorry :roll: I'll have to think of some way to redeem my lost diginity...

"MAF sensor signal and engine rpm are used to calculate a "pseudo-charge pressure" figure which the ECU compares to values in a table. If the air flow number is too high for a given engine speed (an operating condition that must exist under high boost) the ECU gives you a DTC."


Oh, I get it now.  When you were talking about A/F, you meant Air/Flow, not Air/Fuel Ratio... LOL!!!
i]AEB Engines have better-flowing heads and a real throttle cable...[/i]

jayryan

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« Reply #35 on: February 01, 2005, 06:36:59 PM »
Yes. I just couldn't make it come out. I'm going to memorize that and just regurgitate. Anyway, sorry about mucking it up...
And yes, in my head limp=fuel cut although I know that technically they're not the same :roll:

...now on to MAF housing mods....

Jennay...
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Chas

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« Reply #36 on: February 01, 2005, 09:14:03 PM »
I think JR needs to set the Dremel tool down and back away from the car. Slowly...
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jayryan

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« Reply #37 on: February 01, 2005, 09:36:31 PM »
...but the exhaust cut-out....
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SweetVW

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« Reply #38 on: February 02, 2005, 12:12:33 AM »
It is all Greek to me.  :?   Good for you JR for taking this on.
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« Reply #39 on: February 02, 2005, 02:38:42 AM »
Quote from: "Chas"
I think JR needs to set the Dremel tool down and back away from the car. Slowly...

I agree... 8O
i]AEB Engines have better-flowing heads and a real throttle cable...[/i]

jayryan

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« Reply #40 on: February 02, 2005, 10:38:46 AM »
Quote from: "Rusty"
Quote from: "Chas"
I think JR needs to set the Dremel tool down and back away from the car. Slowly...

I agree... 8O


 :twisted: I scare you guys...I find that funny. Muahahahaha!
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Rusty

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« Reply #41 on: February 02, 2005, 05:26:19 PM »
Quote from: "Rusty"
Quote from: "Denver Pat"
Hell, I hope the tuner knows what he's doing.  He was instrumental in the design of the 1.8T!

Actually, the fact that it's taking 21 lbs of boost to get your numbers explains some things.  21 lbs of boost with adequate fuel should easily break 200 WHP.

One way to get around the 210cc/16.32 limitations is to retard the living sh*t out of the timing, and crank the boost way up.

We can test this theory.  Do a 2000-redline WOT run in 3rd gear, logging block 011 and 020.  Go ahead and log block 002 while your at it.  This will give us injector on-time, timing, and individual cylinder knock retard.  We can then compare yours and mine.

That's blocks 002, 011, and 020.  3rd gear WOT from 2000 to redline.

Pat, I found some data that we logged on your car at Second Creek.  It appears that you do indeed have the 16.32 msec limit, but since the driving was so varied on the track, I can't tell anything about your timing.  So please, do a 3rd gear "dyno" run as outlined above - we'll look at your timing, as well as coolant temp.  Your track coolant temps are about 10C higher than my dyno temps - it'll be interesting to see if your dyno temps match mine.  Cooler coolant = more timing = more power (I have a 180F thermostat and fan switch installed).
i]AEB Engines have better-flowing heads and a real throttle cable...[/i]

Rusty

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« Reply #42 on: February 03, 2005, 03:20:01 PM »
Hey, JR - watch things if you drop down to sea level.  You may have to back off a pound or so of boost to prevent overboost conditions.
i]AEB Engines have better-flowing heads and a real throttle cable...[/i]

jayryan

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« Reply #43 on: February 03, 2005, 04:19:14 PM »
Quote from: "Rusty"
Hey, JR - watch things if you drop down to sea level.  You may have to back off a pound or so of boost to prevent overboost conditions.


Thanks. I don't plan have any plans on dropping below SL at this point in time.
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Boris

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« Reply #44 on: February 09, 2005, 01:10:19 PM »
Pat, what about mixture. With that kind of numbers you may be running lean. Rusty?
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DenverPat

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« Reply #45 on: February 09, 2005, 01:15:45 PM »
Boris, my air/fuel is near perfect.  Check your email.
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Boris

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« Reply #46 on: February 09, 2005, 01:58:25 PM »
Who's the tuner?
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DenverPat

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« Reply #47 on: February 09, 2005, 02:02:16 PM »
It's just an MTM chip.
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Chas

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« Reply #48 on: February 10, 2005, 02:16:20 AM »
So JR, now that you've had some time to let things settle in, how's it running now?
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jayryan

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« Reply #49 on: February 10, 2005, 11:30:50 AM »
It's running really well. I only had a few minor issues, but they've seemed to resolve themselves.

I have no rough idle with the injectors and they run really smooth. I have noticed my fuel milage has gone down, but I expected that with larger injectors.

After first adjusting the MBC, I was running a good 12-13lbs. After about two days, the car would not let me boost past 12 without cutting fuel. That's jarring.

So I re-adjusted and ran the car for about three or four days at which time I noticed my boost falling to about 9-10lbs. I opened it up and found that I had not tightened the MBC down all the way and it had unscrewed a bit.

I readjusted again and locked it down tight. The funny thing is that it's now been running closer to 13-14lbs rather than 12-13. It's been there with no problems for the last week or so. Go figure. I look forward to the Dyno Day to find out exactly what I've gained.

I'm extremely happy with my setup, it's perfect for my driving habits. At some point, I will go a bit futher, but now that I have the boost, I'm going to focus on a couple other areas of my car...ie. finish suspension, body work.
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Rusty

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« Reply #50 on: February 10, 2005, 07:59:14 PM »
Quote from: "Boris"
Pat, what about mixture. With that kind of numbers you may be running lean. Rusty?

Pat's A/F is great.  That's why I want to see more data from him...
i]AEB Engines have better-flowing heads and a real throttle cable...[/i]

DenverPat

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« Reply #51 on: February 10, 2005, 08:02:02 PM »
Hey man, I don't have a VAG-COM, so I can't do it on my own.  Next time we hook up we can log all you want.  Or, if you really want the info soon, I could hook up with one of the other guys that has one.
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jayryan

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« Reply #52 on: February 10, 2005, 08:21:35 PM »
Pat, I need to VAG as well...if we score one, we could help each other out.
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