MBC in car adjustment cable?

[insanewayne]

Could someone who has the Hallman evolution pro MBC or whatever it's called let me know how the in car adjustment works? I was thinkin of attaching a cable or some sort or system on the dial and running it into the car, but don't want to have the cable twist 1080 degrees before it actually starts adjusting the boost. It would suck not knowing what boost i was running till i see my gauge pin at 30 VAC hahaha :thumbdown (joke, I'm not that dumb.....really! I'm not!)

Thanks

Wayne

 

[insanewayne]

Thanks to the both of you....this thread really blew up , I think you guys are right though...If this isn't a common DIY thing then I'll just let it be, sell out the money or get a dual stage. I guesse I just wanted to know how there (Hallman) system worked...But unless someone knows we can just close this thread to prevent more useless flaming .

Thanks

Wayne

Edit - I'm 19, but I guesse you can call me a kid. But relative to that I have another quick Question while were here. I'm not and idot....but does the stock ecu not read the air flow from the MAF etc and adjust the fuel accordingly....? I've read this, maybe I'm under the wrong impression...is 14-15 psi out of the ecu's stock fuel trim range. Some one clear this up for me. Thanks

 

[Catbox_95]

Ok, here's a REAL answer to your original QUESTION:
I have a MBC mounted in my console so that I can adjust in-car. It rules, and it is not just a novelty. Tweaking a psi or 2 on the fly for fine adjustments would suck if I had to keep pulling over, getting out, popping the hood, turn a knob, etc. etc. So yes, I do see a real purpose. And yes, once it's set, I don't really mess with it, but I still prefer to be able to do the in-car adjustment.

I made mine from a valve at Home Depot and an 8 foot piece of house. Total cost was like $30. The actual valve is in the car, so I turn the actual valve - no cables necessary. It works really good and has a nice clean look. PM me and I'll send you a picture, and if you have any more questions about what to buy or how to hook it up, just ask.

 

[Catbox_95]

Woops! ...piece of HOSE, not house!

 

[psychlow]

Woops! ...piece of HOSE, not house!

How are you doing this without getting a large amount of boost spike? That'd be my only concern with this.

 

[insanewayne]

Aww shit Now I got put the vinyl siding back on my house haha

I've heard the way you described as well, and was thinkin of doing it, then I thought wouldn't that create a bit of boost spike? So i read more and some people who have done that did experience some substantial spike. Did you notice any problems..? If not I might take a huge chance and make that huge investment of 25$ for some hose and try it out .

 

[insanewayne]

It appears that psychlow asked the same question while i was posting mine .

 

[Catbox_95]

Actually yes, it does create excess boost spike. So THAT'S what the problem is! Yeah, I have a little excessive boost spike, but I never realized why. But now I do and it makes perfect sense.

That being said...

I wonder if a tiny high-pressure plastic hose would be better? I could run the regular rubber hose for a few inches on the turbo side and on the valve side, then reduce it down to a small plastic line. That way there won't be a lot of air sitting in the 8 feet of tubing, thus reducing spike. Hell, it makes sense to me! Off to Home Depot tomorrow to try it out...

 

[insanewayne]

Right on, let us know how it works.

 

[92redman]

Actually yes, it does create excess boost spike. So THAT'S what the problem is! Yeah, I have a little excessive boost spike, but I never realized why. But now I do and it makes perfect sense.

That being said...

I wonder if a tiny high-pressure plastic hose would be better? I could run the regular rubber hose for a few inches on the turbo side and on the valve side, then reduce it down to a small plastic line. That way there won't be a lot of air sitting in the 8 feet of tubing, thus reducing spike. Hell, it makes sense to me! Off to Home Depot tomorrow to try it out...

It's not the type of tubing that's the problem, it's the length. It takes much longer for the wastegate to see the boost signal if it has to go throught 8 feet of tubing first, so that delay is what is causing the spike.

 

[Catbox_95]

Yes, but my thinking is that, if you have much less diameter of tubing, there will be much less air in the tube that has to reach the other end 8 feet away. Take this to the extreme, and imagine just 2 feet of tubing that is 3 inches in diameter. Huge boost spike. But if that 2 foot of tubing was just 1/8", very littly boost spike.

 

[insanewayne]

Yeh, I think it wil help substantially, but not eliminate the spike.

 

[mike markota]

Wayne...here..I had it in my old 951 and it worked beautifully. I miss that car soo much


http://www.lindseyracing.com/Mercha...roduct_Code=LR-VBC-25&Category_Code=951BOOST1

$65...

"Change your boost level from the cockpit of your car with the Lindsey “ VBC “ kit. The “ VBC “ kit can adjust boost pressure on any dual port wastegate. Also works with single port wastegates. Once you set your desired boost level, you can lock in position.

The handy mounting bracket allows you to attach to most any surface.

Kit comes complete with adjustable regulator, air fittings, 15' of purosil tubing (other kits only have 6'), mounting backet and complete installation instructions."

 

[insanewayne]

Wow that's great man thanks alot

Thanks

Wayne

 

[mike markota]

No prob bud..

I think Ill buy another one for the soon to be mine 91 AWD....

See, all porsche parts arent $$$!!!!

mike

 

[psychlow]

Yes, but my thinking is that, if you have much less diameter of tubing, there will be much less air in the tube that has to reach the other end 8 feet away. Take this to the extreme, and imagine just 2 feet of tubing that is 3 inches in diameter. Huge boost spike. But if that 2 foot of tubing was just 1/8", very littly boost spike.

, I think that's the first time I've ever helped someone with a problem on here that they weren't asking help for.

I would be interested to see what would happen if you tried 1/8'' nylon hose and compression fittings to plumb the MBC (similar to what comes for tubing in an Autometer boost gauge.)

This would lessen the volume of air that would need to be pressurized, and also prevent flexing which is a problem with rubber hose. As a nifty side effect, it'd require a much smaller hole to be routed into the passenger compartment.

Let me know if anything like this works out for you!

 

[trevor_shiggs]

I was thinking of using a speedo cable and welding it to my MBC. then put a knob on the other end. Twist knob right Bolt on MBC goes In, Boost goes Up. And Oppistit. I just havn't had time to get around to it.

 

[Defiant]

Wayne...here..I had it in my old 951 and it worked beautifully. I miss that car soo much


http://www.lindseyracing.com/Mercha...roduct_Code=LR-VBC-25&Category_Code=951BOOST1

$65...

"Change your boost level from the cockpit of your car with the Lindsey “ VBC “ kit. The “ VBC “ kit can adjust boost pressure on any dual port wastegate. Also works with single port wastegates. Once you set your desired boost level, you can lock in position.

The handy mounting bracket allows you to attach to most any surface.

Kit comes complete with adjustable regulator, air fittings, 15' of purosil tubing (other kits only have 6'), mounting backet and complete installation instructions."

Kind of expensive for a $20 air regulator, but it does fit on a Porsche....

 

[Thomas91169]

why not get a dual stage boost controller? have a low boost setting for launching and daily driving, and high setting for 2ng-3rd and the track?

i have a dejon tool dual stage and i love it. set it to 11lbs low and 18 high side, and it has a switch that you can select lo or high from wherever you mount the switch.



and about fuel consumption issue. going wot at 11lbs and wot at 20lbs uses the same amount of fuel, so having a lower boost setting for the street will not increase mileage in any way if youre a lead foot. wanna save gas? try to stay under 0psi or in vacuum.

 

[insanewayne]

I would love to get a dual stage, but, as you can tell from this thread...money is my issue,

 

[Boostmonkey]

Um, if im trying to make my gas stretch the few extra miles till i wanna stop at a station, then i just watch my boost gauge and dont boost at all.
its almost impossible after 3rd gear to accelerate without boost unless you have 30mins to get up to freeway speeds but it gets you around town fine. just watch your foot and you can boost as little or as much as you want.

 

[insanewayne]

Lol, yeh , the gas thing was just one of the reasons though, and I think were past the reasoning part, I just want it ahah. But thanks, Sometimes I do force myself to drive like a normal person, but it's hard...... ...I need to get into racing.



Wayne

 

[Defiant]

I would love to get a dual stage, but, as you can tell from this thread...money is my issue,

Then make one:

http://www.dsm.org/archives/1997/11/19971128.txt/10.html

 

[Bailzz]

Hey, I'm an ebay junkie and always seem to find things at there lowest cost....anyways here you go
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=7935431272&category=33742

 

[insanewayne]

Hmm, thanks both of you for those great links, Now I guess I just have to decide how lazy I feel .

Thanks

Wayne

 

[Denji]

holy crap, what is wrong with wanting to change your boost from inside your car? hell id like to be able to do that. I'd just go with an electronic boost controller, they have adjustable settings and is probably the best way to go if you want to do it right. Hmm, if it so pointless why do such respectable brands make them?