what do they use the vacuum box/can for? Is it necessary for stock ecu? Is there alternative ways to get around this? any help please!?!

 

i THINK they use them to "store" vacumm to help the ITB's idle the engine better because there is no plenium.

someone correct me if im wrong!

thanks,
mike

 

The way I'm familiar with is using an electric- or belt-driven vacuum pump connected to a vacuum distribution block to provide vacuum to vacuum-crucial components.

 

you need a vacuum accumulator so you can use you brakes, and also the map sensor

 

the brake booster is on the manifold...and the twm's use a vacuum tap on each tb to connect for the map sensor.....why don't twm's use vacuum cans?

 

the twm does have four vacuum lines off the ITB maniflod true, but the brake booster has a line that attaches to the OEM intake manifold... when you eliminate the manifold, you eliminate the feed for the brake booster. so basicly, a vacuum accumulator/can is needed unless you plan to convert to manual brakes.

A tipical accumulator has the 4 posts for the itbs, 1 for the brake booster, and 1 for the map sensor. Size will vary according to your application.

 

is it possible to run without a vacuum can? let say vacuum for map is provided via 4 into 1(vacuum lines for tb's to map) and a brake booster line similar to the factory-on-manifold. Would it be possible? or is a vacuum can absolutely necessary? I've seen set-ups without it, unless it is hidden very good. If anyone can shed some light.........please do!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BLU EG6 &raquo;</TD></TR><TR><TD CLASS="quote">is it possible to run without a vacuum can? let say vacuum for map is provided via 4 into 1(vacuum lines for tb's to map) and a brake booster line similar to the factory-on-manifold. Would it be possible? or is a vacuum can absolutely necessary? I've seen set-ups without it, unless it is hidden very good. If anyone can shed some light.........please do!</TD></TR></TABLE>

Why do you want to get around it? I'm not too sure your way will work. In any event the vacuum can is not that big and not very hard to make. It is the size of a coke can and the ones i have seen were made out of the a/c condensor cans. Just drill and tap the holes and you are good to go.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SilverCivic2k &raquo;</TD></TR><TR><TD CLASS="quote">

Why do you want to get around it? I'm not too sure your way will work. In any event the vacuum can is not that big and not very hard to make. It is the size of a coke can and the ones i have seen were made out of the a/c condensor cans. Just drill and tap the holes and you are good to go.</TD></TR></TABLE>

I've seen set-ups without the vacuum can and would like to get around it if possible. I'm not sure how it is done and would like to know my options. If someone can paint a picture for me......that would be awesome. thanks for the tip tho!

 

is this a track only application? (a car never to be driven on the street)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B16B &raquo;</TD></TR><TR><TD CLASS="quote">is this a track only application? (a car never to be driven on the street)</TD></TR></TABLE>
yes

 

well, then convert your car to manual brakes, and get rid of the booster. then you wont have the problem, but it is honestly a better to retair the booster adn just make a accumulator. Your dont loose Hp by using it, and it is not that hard to make.

 

why would I have to convert the brakes to manual. The brake booster would be on the manifold....this wouldn't be sufficient?

 

there is no port for the brake booster on the TWM ITB's, hence the need for a vacuum accumulator.


Modified by B16B at 8:43 PM 9/14/2003

 

Yeah, I know that.........but I was meaning custom manifold w/ brake booster attached........I should be more clear.

 

yea, im sure you could, but i really dont think it will create enough vacuum. if you look at the regular Intake manifold design, the booster line is on the plenum, where as the ITBs dont have a common plenum. This generates the problem of taping off of 1 of the itb runners. This could cause more problems then its worth, and you still have the issue of insufficinet vacuum.

If you make an accumulator, you eliminate all of the problems, and it should only cost about $20 to have it made, or cheaper if you can manufacture it yourself


Modified by B16B at 8:54 PM 9/14/2003