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DSPTurtle's Avatar
 
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There should be another nipple on the mitt vac, towards the handle, that blows out air instead of sucking it in. Just move your hose to that nipple. I use the pump bottle thing (forgot the name) with the built in pressure gauge.
Old 03-08-2014, 06:55 AM
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Brando
 
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My mity vac sucks......only
Maybe I can regulate a compressor.

Last edited by quattrorunner; 03-08-2014 at 09:10 AM..
Old 03-08-2014, 08:09 AM
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Brando, you don't even need to mess around with the mity vac or gauges since your AFR numbers are not that far off from optimum. You said that full throttle enrichment goes into the 9s, so all you need to do is push the large disc (the one of the bottom of the adjustable WUR) in about 2mm and you will be into the mid-high 11s. The BL manual says to punch the disc in with a drift and hammer, but Jfairman suggested using a c-clamp, which is what I did, and it works perfectly and is much more precise that the hammer method.

The same is true for the other adjustments - no need to fool around with the gauges, but make small tweeks to the adjusters and see what you get (raise control pressure to get leaner AFR readings and lower them to go richer).

Once you get your hands on it, and make the first adjustment (I would suggest you start with the full throttle enrichment since you will see the most gain from that), you will see that it is quite easy and even fun.

Last edited by Ronnie's.930; 03-08-2014 at 09:39 PM..
Old 03-08-2014, 09:11 PM
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Hey cool. I'll do that.
Also, on the idle rich running issue I decided it didn't matter since it runs fine. Sounds fine and such.
But I don't really see the point of the adjustable regulator since mine is fine at all the parameters including full throttle? Maybe once I start running higher than 1.1 bar?
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Old 03-08-2014, 09:26 PM
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Quote:
Originally Posted by quattrorunner View Post
But I don't really see the point of the adjustable regulator since mine is fine at all the parameters including full throttle? Maybe once I start running higher than 1.1 bar?
Maybe I read it wrong, but in your first post you said that with your current WUR, cruise AFR was 15.5 (too lean for smooth running), and when a load is added (slight hill and steady throttle) it goes even leaner. You can fix that with the adjustable WUR.

Also, if you lean out your idle AFR to around 13.5 it will run/idle even better than you say it does now - 12:1 is too rich for idle and just sending excess unburnt fuel out of the tail pipe and into the oil.

Last edited by Ronnie's.930; 03-08-2014 at 09:42 PM..
Old 03-08-2014, 09:37 PM
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Correct.
I richened the mixture down further at idle to 11.1 which is better for cruise. Not what I'd like still but not unsafe either.
In a perfect world I'd love 14.7 afr idle and 14.7 cruise with 12 full throttle. I just don't see it happening unless I can figure out this adjustable regulator. Sounds like I will be able to fiddle with it using trial and error adjustments.
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Old 03-08-2014, 09:45 PM
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You'll be able to get those numbers easily with the adjustable WUR. Also, I want to mention that the idle and cruise AFRs you note above are almost exactly what the USA Lambda system provides - 14.7 at idle, while fine, makes the engine miss/run rough slightly, and same for cruise (not quite as noticeable, though) . . . 13.5 idle is more or less dead nuts perfect/smooth and so is 14.5 cruise.

Last edited by Ronnie's.930; 03-08-2014 at 09:51 PM..
Old 03-08-2014, 09:48 PM
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Thanks. That c clamp comment was exciting! I'm doing that.
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Old 03-08-2014, 09:56 PM
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OK, I'm feeling good and confused but good.
I used the c clamp on the fuel enrichment disc on the bottom of the unit and expected a change to the full boost mix and got that but also got a change to everything else too. So I adjusted idle mix to 14 and cruise went to 14. So I have really good mixtures everywhere. I got so used to 15-16afr on the freeway that it's odd I have a richer mix now. My EGT is reasonable too obviously.
Reason I'm confused is that I did nothing to the other adjustments. Whatever, I'm happy.
My full boost mix is now 10.5. Should I push in the pin more?
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Old 03-10-2014, 02:23 PM
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Sounds like you're getting the hang of it, Brando!

Ya', I forgot to mention that when you make a fairly large change to one setting it can alter the others slightly - tiny changes really don't do that (as in, when you are dialing in your final, very fine tune to 10ths of a point).

10.5 is a little rich, but safe, and only giving away a tiny bit of horsepower at the top end. You can push the disk in a little more, but if it goes too far in (too lean) you will have to draw it out with that special tool that was part of the kit. Do you have that? Mine is around 10.9-11.4 full enrichment, and I've been happy with that as it is on the safe side, but is lean enough that it really rips at high RPM (no hesitation or bog down, etc.)

14 cruise is a little on the rich side and will make your cruise fuel economy a tiny bit worse, but if you like how it runs at that AFR (which it looks like you do) I would leave it for a while and just see how it behaves.
Old 03-10-2014, 03:35 PM
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I'll drive like this for a few but I'm sure I'll be screwing with it again cause I do feel there is more power I've lost on top. And yeah I'd like to dial cruise in more but for now it's cool knowing the exhaust is not hot as hell. Thanks for the help it made all the difference for me.
BTW If I had made the adjustment the full 2mm as per your recommendation I would have it perfect!. I went the width of a washer I had which was 1.8mm
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Old 03-10-2014, 03:42 PM
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what'd your EGT drop to?

I see 1550's sometimes... (1cyl probe)
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Old 03-10-2014, 04:27 PM
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80 mph up hill I had 1330. Before it would be 1550 at least same conditions.
Old 03-10-2014, 04:41 PM
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hmmm, I def see 1460-1550 regularly - that's @ 14.7ish cruise and 12-12.8WOT <5500

never in the 1300s!

always wondered why so high, oy...
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| '58 TR3A | '01 //S8 | '95 //S6 6gang | '88 ///M5 | '87 190E 2.3-16 |
Old 03-10-2014, 04:53 PM
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Brando, that's a pretty big change in EGT - sweet! No problem about the help - glad to do it.

And in case you've ever wondered about it, here is Paul hard at work at his office job -

Last edited by Ronnie's.930; 03-10-2014 at 05:01 PM..
Old 03-10-2014, 04:57 PM
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Paul, 12.8 full boost is really well beyond the limit for K-jet and air cooled heads . . . if you had a knock sensor, I bet it would be going nuts at that point. It would probably be wise to richen it to 11.5- 12 when WFO.

Last edited by Ronnie's.930; 03-10-2014 at 05:04 PM..
Old 03-10-2014, 05:01 PM
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yeah I was running out of fuel over 5k, by 5500 I was seeing high 12s low 13s... would rarely bring it up there tho

hesitated to richen it up as it'd run pig rich everywhere else then no? WFO @ lower revs was a nice 11.2-11.4 solidly until high 4 to low 5k's

it's kinda moot today/tomorrow as I'll be new turbo, cams, and dual 044's... least, hopefully moot 8-)

will likely be tapping your dare I say wisdom on BLWUR tweakage once I'm up and running - like it or not fukko
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| '01 ///M5 | '96 993 C2 cab | '05 S600 Sport - biturbo V12@Just Not Right 495rwhp / 612rwtq |
| '58 TR3A | '01 //S8 | '95 //S6 6gang | '88 ///M5 | '87 190E 2.3-16 |
Old 03-10-2014, 05:09 PM
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yeah I was running out of fuel over 5k, by 5500 I was seeing high 12s low 13s... would rarely bring it up there tho

hesitated to richen it up as it'd run pig rich everywhere else then no? WFO @ lower revs was a nice 11.2-11.4 solidly until high 4 to low 5k's

it's kinda moot today/tomorrow as I'll be new turbo, cams, and dual 044's... least, hopefully moot 8-)

will likely be tapping your dare I say wisdom on BLWUR tweakage once I'm up and running - like it or not fukko
It might run a bit richer at lower revs WFO, but that can be somewhat dialed out with the boost onset adjustments, and regardless, would be preferable to running so lean at high RPM. I hear you though regarding rarely going there - too many times up there on the street will result in huge fines and/or backward trips into a ditch (or oncoming traffic)!

And take note that that is the ONLY thing of mine that you will "tap", despite your not-so-veiled fantasies otherwise!
Old 03-10-2014, 05:31 PM
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Schpeaking of which, I'll have to be quick here b/c it's time to go upstairs and tap sommadat sheet yo.

but...

Quote:
Originally Posted by Ronnie's.930 View Post
I hear you though regarding rarely going there - too many times up there on the street will result in huge fines and/or backward trips into a ditch (or oncoming traffic)!
er uh ummmm... no. That is NOT why.

It's b/c I don't have FU ballar budget monays to fund the rebuild that such fewlery leads to... my car is otherwise verymuch WOT herethere everywherealways, just not up thru the high revs and have to shortshift the bish somewhat... sommmme of us know how to drive, see.... Weeeee actually have hills and curves and 4-5lane wide open intarstates here (muwhahahaaa).



yeah that's right bizzatch.
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past:

| '01 ///M5 | '96 993 C2 cab | '05 S600 Sport - biturbo V12@Just Not Right 495rwhp / 612rwtq |
| '58 TR3A | '01 //S8 | '95 //S6 6gang | '88 ///M5 | '87 190E 2.3-16 |
Old 03-10-2014, 07:32 PM
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Schpeaking of which, I'll have to be quick here b/c it's time to go upstairs and tap sommadat sheet yo.
I had forgotten that this was the week that Jacob was to pay you a visit (in more ways than one, oviously).

And as always thanks for the bird, and take that!
Old 03-10-2014, 08:44 PM
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