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When you release then depress the throttle when you shift, the boost will spike until it stabilizes.

Posted by: Innovator on 2003-06-29 19:36:40
Account #: 4461

In Reply to: Umm??? LOL posted by Nogaro Baller on 2003-06-29 19:33:55

Part of the mechanical latency of the slow N75, and the time it takes for the ECU to figure out what's going on..

The MBC, or the EBC will reduce that.

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 (6275 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 (949 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 (809 views)

This is true. A very good point, but 1 bar is plenty for a KO3 IMO. - Innovator 2003-06-29 19:31:40 (952 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 (1147 views)

Is that a dual or single solenoid? - Innovator 2003-06-29 20:12:48 (614 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 (909 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 (652 views)

Sooo argumentative ;) - Nogaro Baller 2003-06-29 19:41:17 (468 views)

At least i don't dangle shit in front of people like an idiot :-) - Innovator 2003-06-29 19:55:29 (514 views)

What is there to dangle. - Nogaro Baller 2003-06-29 20:02:59 (565 views)

Haha....that is funny. - Singletrack 2003-06-30 03:33:11 (465 views)

His little winky . - Innovator 2003-06-29 20:08:52 (468 views)

lol - Nogaro Baller 2003-06-29 20:12:36 (419 views)

spikes? not all of us have spike issues - K04madness 2003-06-29 18:52:01 (790 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 (677 views)

No quicktime. Did you get your car back? - Innovator 2003-06-29 19:06:34 (429 views)

Spikes happen during shifts, not while on throttle. - Singletrack 2003-06-29 19:06:06 (515 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 (583 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 (744 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 (490 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 (489 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 (614 views)

No, the MBC would go after the N75 if you kept the N75 in line. - Innovator 2003-06-30 05:39:11 (699 views)

have you done this, or is it just a theory? - CharlieGSanD 2003-06-30 08:41:16 (580 views)

I have done it. It works, no doubt. - Innovator 2003-06-30 18:06:23 (455 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 (629 views)

Call me Eric Fletcher,........ LOL. - Innovator 2003-06-29 18:27:52 (592 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 (712 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 (515 views)

what does 1.5 convert to in psi anyways? over 22 i am guessing - buffalonogaro 2003-06-30 00:04:30 (624 views)

21.755662 - Innovator 2003-06-30 05:36:54 (483 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 (446 views)

;-) sorry just heading out, I'll look for you when I get back. - FunkWeasel 2003-06-29 18:29:24 (412 views)

Shhhh!!! dont tell people!!! - Nogaro Baller 2003-06-29 18:24:29 (437 views)

hush troll - Nogaro Baller 2003-06-29 18:21:56 (483 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 (542 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 (814 views)

Looks cool, but does it work better than the Dawes? And how much is it? - Innovator 2003-06-30 18:07:42 (572 views)

But then the "dawesdevice" is a $7 pressure relief valve from McMaster-Carr - FunkWeasel 2003-06-30 18:14:51 (674 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 (461 views)

From Dawes or the other place? - Innovator 2003-06-30 18:25:54 (529 views)

Mcmaster. Dawes wants $40 for it, and I'm cheap. - FunkWeasel 2003-06-30 18:27:25 (440 views)

Does it still allow the ECU to taper boost at high rpm? - Kitch 2003-06-29 20:07:50 (471 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 (586 views)

Agree, some people are trying that on K04s ;-) - DarinS4Turbo 2003-06-29 19:16:15 (434 views)

And already have them installed on K03's with various ECU's.. - Milpitas2.7T 2003-06-29 20:23:52 (584 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 (549 views)

Thats teh plan >8-D - Nogaro Baller 2003-06-29 19:19:10 (449 views)

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