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Microtech Vac line diagram

Old 09-04-03, 06:03 AM
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Vac line diagram

Im just wondering what you guy have done for your vac lines and crankcase ventalaton.
Ive gotta take my inlet manifold off soon, so i thought i would get opinions on how mine is setup and hear what others have done too. im going to use some silicone hose this time too! (i should of the 1st time)

this is basicly how mine is now.. slightly different but the best the brain remembers.

https://www.rx7club.com/forum/attach...postid=2119623

RED = vac lines
BLUE = fuel
GREEN = crankcase ventilation

all unused vac nipples are capped (not shown)
ive kept the pressure sensor so my std boost gague works (which it does with a 5v power source) and the charchol canister so that a (not too hard) look under the bonnet dosent scream ive got no emmisions gear at all
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Old 09-04-03, 11:37 PM
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Adsy,

dont ever use the silicon stuff for vacuum lines, it is crap it sucks closed and blow up like a ballon under boost,

i did a test the other week,

took a piece of 1/4" id blue silicon hose and a 1/4" id -4 braided hose, the pressure difference they read was 4psi!! so if you use one on your map sensor you will be reading 4psi less than what the motor is getting!!

Dale
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Old 09-05-03, 12:48 AM
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dale, are we talking like -4 stainless braided hose? if so. i dont even know where to get something this tiny.... all the silicone hose ive seen.....www.hosetechniques.com has been VERY high quality stuff, and very thick walls. i couldnt ever imagine that stuff collapseing when i can barley sqeese it close with my hand.


Daniel
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Old 09-05-03, 01:51 AM
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yes -4 rubber hose (1/4" ID) covered with a stainless braid, that stuff is eaisly avaliable down here, looks 400 times better than the silicon stuff as well,

the stuff i had was 1/4" ID and had a very stiff thick wall but it still managed to swell and suck closed,

ill get some pics of my engine bay with the new braided vac lines,

Dale
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Old 09-05-03, 06:04 AM
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hmm steel Braided rubber hose eh?
what about using cheaper
Cotton Braided Hose?

you use wire straps to keep it in place also?
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Old 09-05-03, 04:46 PM
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Wow. I've got silcone vacuum lines myself.
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Old 09-05-03, 09:21 PM
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Originally posted by 10sec rx7
Adsy,

dont ever use the silicon stuff for vacuum lines, it is crap it sucks closed and blow up like a ballon under boost,

i did a test the other week,

took a piece of 1/4" id blue silicon hose and a 1/4" id -4 braided hose, the pressure difference they read was 4psi!! so if you use one on your map sensor you will be reading 4psi less than what the motor is getting!!

Dale
thanks for that Dale,
can you get a reinfoced type of silicon hose??
im not too happy with the rubber thats on there now it may of just been a bad batch though, but it has aged alot and it's very low mileage and 6 months old.

Also what about the silicon hose that comes with things like turbosmart boost contollers?? ive seen two types.. the red stuff (looks reinforeced, is very think and heavy duty looking) and the plain looking clear stuff, are they suppling stuff that should be replaced?

Any one want to comment on the digaram?
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Old 09-07-03, 02:08 PM
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wow, thanks a ton for the heads up. I have silicon/braided hose for the fuel lines on my R/C car. However it's to small to be used as vac lines
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Old 09-07-03, 08:51 PM
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adsy,

not sure if you can get reinforced stuff or not, the turbosmart stuff is really really stiff and seems ok, its the ***** blue and red stuff that is no good,

Kabooski

i am using speed flow 100 series hose, as seen here
Speed flow hose

im using the -4 hose which is 1/4" and using the 100 series hose ends for it, no more leaks no more hose clamps!! everything just unbolts!

Dale
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Old 09-08-03, 03:36 AM
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well i redid the vac lines today i slightly changed it from the 1st diagram, im not using any of the lines from near the throttle body now.

Last edited by Adsy01; 09-08-03 at 03:40 AM.
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Old 09-08-03, 01:26 PM
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Dale,
What kind of prices are we talking about with that hose?
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Old 09-08-03, 06:19 PM
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its pretty cheap mate,

here is a small list of the prices, i have a full price list here if you want some specific prices.
vac lines are -4, turbo oil feeds etc are -6, brake booster line is -8, oil cooler -10 etc,
all prices are +10% gst, hose prices are per Metre (around 3 foot)

Item # Item Name List Price
100-04 -4 High Performance Hose $37.40
100-05 -5 Hose Braided $43.00
100-06 -6 Hose High Performance $33.00
100-07 -7 Hose Braided $49.00
100-08 -8 High Performance Hose $42.00
100-10 -10 High Performance Hose $52.00
100-12 -12 High Performance Hose $59.00
100-16 -16 High Performance Hose $82.50
100-20 -20 High Performance Hose $165.00
101-04 -4 Straight Hose End $14.30
101-06 -6 Straight Hose End $12.10
101-08 -8 Straight Hose End $14.30
101-10 -10 Straight Hose End $19.80
101-12 -12 Straight Hose End $27.50
101-16 -16 Straight Hose End $44.00
101-20 -20 Straight Hose End $77.00
102-04 -4 45 Degree Hose End $35.20
102-06 -6 45 Degree Hose End $30.25
102-08 -8 45 Degree Hose End $35.20
102-10 -10 45 Degree Hose End $44.00
102-12 -12 45 Degree Hose End $55.00
102-16 -16 45 Degree Hose End $88.00
102-20 -20 45 Degree Hose End $154.00
103-04 -4 90 Degree Hose End $35.20
103-06 -6 90 Degree Hose End $30.25
103-08 -8 90 Degree Hose End $35.20
103-10 -10 90 Degree Hose End $44.00
103-12 -12 90 Degree Hose End $55.00
103-16 -16 90 Degree Hose End $88.00
103-20 -20 90 Degree Hose End $154.00
104-06 -6 120 Degree Hose End $38.50
104-08 -8 120 Degree Hose End $46.20
104-10 -10 120 Degree Hose End $55.00
104-12 -12 120 Degree Hose End $66.00
104-16 -16 120 Degree Hose End $110.00
105-06 -6 150 Degree Hose End $38.50
105-08 -8 150 Degree Hose End $46.20
105-10 -10 150 Degree Hose End $55.00
105-12 -12 150 Degree Hose End $66.00
105-16 -16 150 Degree Hose End $110.00
106-06 -6 180 Degree Hose End $38.50
106-08 -8 180 Degree Hose End $46.20
106-10 -10 180 Degree Hose End $55.00
106-12 -12 180 Degree Hose End $66.00
106-16 -16 180 Degree Hose End $110.00
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Old 09-08-03, 08:38 PM
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Hmm... Sounds like someone *wink wink* should make and sell a kit.
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Old 09-08-03, 09:21 PM
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Originally posted by Turbo Timmy
Hmm... Sounds like someone *wink wink* should make and sell a kit.
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Old 09-09-03, 05:13 PM
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you guys tell me what you want and ill get something happening,

the only problem with the braided stuff is you need a 1/4" vacuum point to put it onto!! i drilled and tapped my UIM with a 1/8bsp tap and screwed in fittings, looks hot and works a treat as all the fittings are anodized blue and red.

Dale
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Old 09-09-03, 10:46 PM
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What size is the nipple for the MAP sensor on the back of the ECU?

You should have 2 sources, right? One un-interrupted to the MAP sensor and the other one for the boost gauge and BOV, or am I mistaken?

I wouldn't need very much line, around 2-2.5 meters should be plenty. Then, I'll need to understand more on how they connect to the BOV, MAP, and boost gauge.
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Old 09-10-03, 05:38 AM
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ill have a look and see if i can get the 1/4" stuff on the map sensor, shouldnt be a problem,

ill get some pics of my connection method, that will give you some ideas.

Dale
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Old 09-21-03, 09:48 AM
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yeah a kit would be nice..... i'm interested....
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