AudiWorld Forums: Well, if you set it to < 1 bar to prevent the above scenario, you lose alot of low/end power

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Well, if you set it to < 1 bar to prevent the above scenario, you lose alot of low/end power

Posted by: DarinS4Turbo on 2003-06-29 19:24:40
Account #: 16111

In Reply to: You need to keep it to an amount that the turbos can sustain. posted by Innovator on 2003-06-29 19:17:45

1.2-1.3 bar is perfectly doable by the K03s in this area and results in a nice increase in torque over just 1 bar (my XR @ 1.3+ bar even showed significant gains in MAF airflow over the X @ 1.2 bar at say 3500rpm) I agree with using an MBC but only on K04s, not on K03s, as you lose the flexibility of taking advantage of what the K03s can flow down low in order to limit them up top.

2000 6-spd

Thread:

So how many of you are using a MBC or EBC in your S4? Did you know how well it really works? - Innovator 2003-06-29 17:26:27 (6281 views)

Although on K03s the wastegate is left shut after 5500rpm ;-) - DarinS4Turbo 2003-06-29 19:13:20 (1505 views)

You need to keep it to an amount that the turbos can sustain. - Innovator 2003-06-29 19:17:45 (951 views)

Well, if you set it to < 1 bar to prevent the above scenario, you lose alot of low/end power - DarinS4Turbo 2003-06-29 19:24:40 (810 views)

This is true. A very good point, but 1 bar is plenty for a KO3 IMO. - Innovator 2003-06-29 19:31:40 (953 views)

Yeah, I do like the spool-up quickness and spike prevention of the MBC - DarinS4Turbo 2003-06-29 20:13:12 (689 views)

Geddy Profec B Is The Way 2 Go In EBCs - Y2K_S4_Blown Turbos 2003-06-29 20:10:45 (1148 views)

Is that a dual or single solenoid? - Innovator 2003-06-29 20:12:48 (616 views)

Single solonoid. The Spec II will be available in dual solonoid later this year. - Nogaro Baller 2003-06-29 20:19:58 (631 views)

Or.. HKS EVC 5 ;) - Nogaro Baller 2003-06-29 19:33:23 (910 views)

Any of the ones that will allow the boost to be adjusted in RPM increments and gear load. - Innovator 2003-06-29 19:39:18 (653 views)

Sooo argumentative ;) - Nogaro Baller 2003-06-29 19:41:17 (470 views)

At least i don't dangle shit in front of people like an idiot :-) - Innovator 2003-06-29 19:55:29 (515 views)

What is there to dangle. - Nogaro Baller 2003-06-29 20:02:59 (568 views)

Haha....that is funny. - Singletrack 2003-06-30 03:33:11 (468 views)

His little winky . - Innovator 2003-06-29 20:08:52 (471 views)

lol - Nogaro Baller 2003-06-29 20:12:36 (420 views)

spikes? not all of us have spike issues - K04madness 2003-06-29 18:52:01 (791 views)

All of the software I've seen spikes. So will yours. - Innovator 2003-06-29 18:57:40 (493 views)

rick did you watch my video i posted? - K04madness 2003-06-29 19:02:16 (679 views)

No quicktime. Did you get your car back? - Innovator 2003-06-29 19:06:34 (430 views)

Spikes happen during shifts, not while on throttle. - Singletrack 2003-06-29 19:06:06 (518 views)

have you driven an S4 dude? keep your car at 4K rpm and floor it - notice the boost spike? - K04madness 2003-06-29 19:44:35 (586 views)

Same basic programing dude on an A6, but yes I have driven several S4s, not that it is relevant. - Singletrack 2003-06-30 03:40:38 (749 views)

Hmmm Mine doesnt :-D - Nogaro Baller 2003-06-29 19:53:55 (429 views)

Umm??? LOL - Nogaro Baller 2003-06-29 19:33:55 (491 views)

When you release then depress the throttle when you shift, the boost will spike until it stabilizes. - Innovator 2003-06-29 19:36:40 (490 views)

Understood, i misunderstood "SingleTrack"s post. - Nogaro Baller 2003-06-29 19:39:27 (486 views)

When you release then depress the throttle when you shift, the boost will spike until it stabilizes. - Innovator 2003-06-29 19:35:38 (431 views)

Yup, and a MBC in line will reduce them to almost nothing. - Innovator 2003-06-29 19:07:42 (636 views)

wouldnt it need to be on a parallel circuit to limit boost? - CharlieGSanD 2003-06-29 23:46:04 (617 views)

No, the MBC would go after the N75 if you kept the N75 in line. - Innovator 2003-06-30 05:39:11 (702 views)

have you done this, or is it just a theory? - CharlieGSanD 2003-06-30 08:41:16 (583 views)

I have done it. It works, no doubt. - Innovator 2003-06-30 18:06:23 (457 views)

hrmmm....... - CharlieGSanD 2003-06-30 18:12:19 (633 views)

I hate this cryptic bullsh!t...if you have good information share it. What do you expect beside - 2k2S4 :: Indukted 2003-06-29 18:17:16 (632 views)

Call me Eric Fletcher,........ LOL. - Innovator 2003-06-29 18:27:52 (594 views)

Here's some info. They work great on X, MTM, and APR. Seem to be a problem on Piggie's - FunkWeasel 2003-06-29 18:23:16 (714 views)

Oh yeah, don't go over 1.5bar! Throttle shuts. - FunkWeasel 2003-06-29 18:30:16 (542 views)

That won't be a problem without those nasty boost spikes. - Innovator 2003-06-29 18:33:48 (516 views)

what does 1.5 convert to in psi anyways? over 22 i am guessing - buffalonogaro 2003-06-30 00:04:30 (626 views)

21.755662 - Innovator 2003-06-30 05:36:54 (484 views)

I know, just making sure people don't go overboard with the control! - FunkWeasel 2003-06-29 19:03:06 (454 views)

I could imagine that invites other problems as well. =) - 2k2S4 :: Indukted 2003-06-29 18:32:33 (482 views)

Funky - get on AIM foo! - Nogaro Baller 2003-06-29 18:25:03 (450 views)

;-) sorry just heading out, I'll look for you when I get back. - FunkWeasel 2003-06-29 18:29:24 (414 views)

Shhhh!!! dont tell people!!! - Nogaro Baller 2003-06-29 18:24:29 (438 views)

hush troll - Nogaro Baller 2003-06-29 18:21:56 (487 views)

Maybe - Nogaro Baller 2003-06-29 18:10:01 (441 views)

So I assume you are running one right now? More.... - Kitch 2003-06-29 17:35:51 (544 views)

Re: So I assume you are running one right now? More.... - Innovator 2003-06-29 18:30:34 (679 views)

Here's a more elegant solution, sans Orchard Supply Hardware. ;) - Jason @ ND 2003-06-30 09:24:40 (816 views)

Looks cool, but does it work better than the Dawes? And how much is it? - Innovator 2003-06-30 18:07:42 (573 views)

But then the "dawesdevice" is a $7 pressure relief valve from McMaster-Carr - FunkWeasel 2003-06-30 18:14:51 (675 views)

Damn your right! It works perfectly though, and I only pay a fraction of the list price. - Innovator 2003-06-30 18:21:25 (471 views)

Already ordered 2 of them before all you guys flood them with orders. ;-) - FunkWeasel 2003-06-30 18:22:20 (462 views)

From Dawes or the other place? - Innovator 2003-06-30 18:25:54 (531 views)

Mcmaster. Dawes wants $40 for it, and I'm cheap. - FunkWeasel 2003-06-30 18:27:25 (441 views)

Does it still allow the ECU to taper boost at high rpm? - Kitch 2003-06-29 20:07:50 (472 views)

No, you would need a EBC for that. Most tuners are wringing them out anyway. Most, not all... - Innovator 2003-06-29 20:10:02 (588 views)

Agree, some people are trying that on K04s ;-) - DarinS4Turbo 2003-06-29 19:16:15 (437 views)

And already have them installed on K03's with various ECU's.. - Milpitas2.7T 2003-06-29 20:23:52 (585 views)

At least on X you can ignore the requested if you like, and it won't set any codes. - FunkWeasel 2003-06-29 19:03:53 (551 views)

Thats teh plan >8-D - Nogaro Baller 2003-06-29 19:19:10 (452 views)

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