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Everywhere ... When used in parallel, it would control the upper boost threshold

Posted by: jbear@work on 2004-03-19 11:45:05
Account #: 9725

In Reply to: would a mbc in parallel control spikes up high as well as down low? posted by shl rider on 2004-03-19 11:41:31

, protecting against spikes based on the MBC configuration. What I gather is that it is best to set it at or slightly higher then the peak requested boost #.

This will most likely take some initial tweaking and logging ..

________________________________________

2001 S4 6-Speed Santorin

Engine/Drivetrain: VAST Stage III Fueling (GIAC X/XR), TCD, MBC in parallel, RS4 - Injectors Y-Pipe IC's Airbox MAF (VAST Conv. for the Hitachi Sensor) Clutch Fuel Pump, HyperBoost BPV's, Samco F-Hose, APR Bi-Pipe, Labree Splits w/out Cats, Miltek Single (No reducer), AWE DTS, APR Snub, TG SS.

Suspension/Brakes: H&R Streets, Neuspeed Rear Swaybar (Soft), Zimmerman front rotors, Mintex Red Pads all the way around. Avoid these pads like the plague unless you are 100% stock.

Exterior: 18" BBS CH w/GoodYear GS-D3's (225/40/18), M3 Lip Spoiler, SPP Foglight Bulbs, RS4 Grill, E-Codes.

Interior: UUC Alcantata Boot, TwinData
EFU, Strat S4 Logo Floor Mats, HW V1, PhatBox.

Why didn't I just buy a 993 or 996 TT ?

Thread:

Since there seem to be a lot of questions on how N75 vs MBC vs Both affect boost, I drew this up... - Mark P 2004-03-19 08:48:12 (15006 views)

Another option is just to run a EBC (like I'm doing now) - Joshua (wishbone) 2004-03-19 14:17:14 (1493 views)

What chip software are you running? - Verrückt 2004-03-19 14:27:15 (717 views)

I'm running GAIC X, so I don't see any deviation codes, but I don't run much higher than 18-19 PSI - Joshua (wishbone) 2004-03-19 14:28:28 (848 views)

would a mbc in parallel control spikes up high as well as down low? - shl rider 2004-03-19 11:41:31 (864 views)

Whenever the boost reaches the set value of the MBC, the MBC bleeds off the extra - Mark P 2004-03-19 11:52:48 (864 views)

Everywhere ... When used in parallel, it would control the upper boost threshold - jbear@work 2004-03-19 11:45:05 (755 views)

That is correct. That is how mine is set. - DAP 2004-03-19 11:46:27 (606 views)

damn... looks like I need a MBC - Why would one not do it ? - sfored 2004-03-19 10:51:30 (767 views)

GFB manual boost controllers in stock. - Jason @ ND 2004-03-19 11:25:40 (1559 views)

How much? Can't find it on your website. - VonK :: Indukted 2004-03-19 14:52:34 (615 views)

Cooling fins will add at least 5% powa. ;) - VonK :: Indukted 2004-03-19 13:32:18 (748 views)

Damn that's ugly... - reefer_bob 2004-03-19 12:23:33 (602 views)

And you think those brass hardware store MBCs out there aren't?! - Jason @ ND 2004-03-19 14:24:19 (657 views)

"Why would one not do it?" - W0LSC0D(Anti-Rice) 2004-03-19 10:57:35 (787 views)

i was always under the impression that you coulndt run an mbc on - 2000s4biturbo 2004-03-19 10:50:59 (1054 views)

Answers inside... - Verrückt 2004-03-19 11:21:53 (1113 views)

Nope. - DAP 2004-03-19 10:56:22 (650 views)

so i just hook it up the same way i would run any MBC? - 2000s4biturbo 2004-03-19 10:57:35 (738 views)

Read Mark's post. It depends on what you are trying to accomplish. - DAP 2004-03-19 11:01:46 (2557 views)

pic doesnt work. ok so idealy i would want - 2000s4biturbo 2004-03-19 11:06:27 (771 views)

If you don't have boost spikes and you aren't doing any fuel upgrades, the chip by itself is fine. - DAP 2004-03-19 11:08:02 (585 views)

alright sounds good. thanks for clearing some stuff up for me !!!!!! - 2000s4biturbo 2004-03-19 11:10:05 (504 views)

red - W0LSC0D(Anti-Rice) 2004-03-19 11:03:28 (620 views)

Right click, show picture. - DAP 2004-03-19 11:05:30 (600 views)

<Stepping aside for DAP to deflower the n00b> - W0LSC0D(Anti-Rice) 2004-03-19 10:58:13 (585 views)

deflower! but im not a noob 8-P , i just never looked into - 2000s4biturbo 2004-03-19 11:03:06 (626 views)

Sound like a n00b to me. - mpwolf 2004-03-19 11:41:34 (510 views)

I was just kidding, man. I meant no disrespect. - W0LSC0D(Anti-Rice) 2004-03-19 11:05:25 (485 views)

lol i didnt get offended. - 2000s4biturbo 2004-03-19 11:09:30 (516 views)

No, no, no! Look at the diagram. - DAP 2004-03-19 11:04:18 (579 views)

i posted before you got the diagram up. thanks a million :-) - 2000s4biturbo 2004-03-19 11:09:02 (488 views)

<bowing graciously> :P - DAP 2004-03-19 11:02:42 (458 views)

BTW, I think boost builds quicker no matter which way you have the MBC set up. However... - W0LSC0D(Anti-Rice) 2004-03-19 09:49:12 (894 views)

I agree. - DAP 2004-03-19 10:37:51 (527 views)

I feel like I am talking to myself when I respond to you :p - W0LSC0D(Anti-Rice) 2004-03-19 10:39:35 (472 views)

Great minds... - DAP 2004-03-19 10:46:16 (471 views)

I'm far far far far far from a great a mind, but thanks! - W0LSC0D(Anti-Rice) 2004-03-19 10:47:30 (464 views)

Awesome representation Mark! - Verrückt 2004-03-19 09:47:50 (461 views)

So which is better? In you opinion, of course ;) - swinmachine 2004-03-19 09:42:28 (531 views)

Totally depends on your setup and what you want to accomplish. - W0LSC0D(Anti-Rice) 2004-03-19 09:44:49 (764 views)

Is it correc to say that MBC alone will yield the most power because... - Swank4 2004-03-19 10:18:16 (775 views)

Peak power may not be much higher, but it will yeild more area under the curve... - Verrückt 2004-03-19 11:16:19 (656 views)

Yeah, that is why I say it depends on your objective. I want power AND reliability. Therefore.... - W0LSC0D(Anti-Rice) 2004-03-19 10:32:49 (694 views)

What's better for the engine i guess? I've got ko4's on ko3 software, so i'm - swinmachine 2004-03-19 10:17:36 (658 views)

Unless you've got fueling upgrades, you probably want the MBC in parallel with the N75. - DAP 2004-03-19 10:39:57 (695 views)

Re: Unless you've got fueling upgrades, you probably want the MBC in parallel with the N75. - iturk 2004-08-15 08:18:59 (630 views)

Okay, from now on, you are in charge of answering questions! We end up saying the same thing :) - W0LSC0D(Anti-Rice) 2004-03-19 10:40:49 (514 views)

I'll accept that awesome responsibility! - DAP 2004-03-19 10:44:43 (487 views)

And i thank you both :) - swinmachine 2004-03-19 10:51:28 (493 views)

"What's better for the engine" They are all fine. - W0LSC0D(Anti-Rice) 2004-03-19 10:35:20 (612 views)

Are boost spikes EVAR good for the engine? - reefer_bob 2004-03-19 10:32:43 (593 views)

Very nice simple explanation! Why didn't I think of that!? - W0LSC0D(Anti-Rice) 2004-03-19 09:24:32 (511 views)

Great info - a side note to others about the blue line - it can still taper down - DarinS4Turbo 2004-03-19 09:23:51 (729 views)

I added a "PPS" :o) - Mark P 2004-03-19 11:00:35 (549 views)

Good point Darin. Closed wastegates on K03's will taper down to 15 psi at redline. - Verrückt 2004-03-19 09:45:53 (824 views)

Exactly! Here is an example of a k03 car running MBC only and tapering.... - W0LSC0D(Anti-Rice) 2004-03-19 09:27:53 (1117 views)

Add a few plumbing diagrams for each setup and make it a tech - jbear@work 2004-03-19 09:17:42 (1449 views)

"Freak of nature"... I like that! :) - DAP 2004-03-19 10:43:41 (499 views)

so should we run MBC's? - 2000s4biturbo 2004-03-19 09:14:15 (594 views)

Absolutely no need if you happy with your current boost delivery. - W0LSC0D(Anti-Rice) 2004-03-19 09:47:12 (665 views)

In parallel with the N75, sure wouldn't hurt it seems.... - reefer_bob 2004-03-19 09:18:50 (775 views)

That about sums it up... This might be a good place also... - reefer_bob 2004-03-19 08:53:00 (888 views)

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