Vacuum line

[johnny5]

Being that the V7 EJ207 is blessed with so many factory vacuum signals is it safe to splice into the fuel reg manifold line?

I think I read somewhere its not suitable.

[Andy_Mac]

For boost gauge i'm guessing?

Why not just the bov/bpv line

[loner]

The fuel reg is one place I wouldn't splice into. Many other choices.

[johnny5]

 loner said:

The fuel reg is one place I wouldn't splice into. Many other choices.

Why is it bad ?? Not sure if your familiar with v7 engines Loren but besidesthe bov and fuel reg thats pretty much it.. Although there is another that can be made but I snapped the bung off trying to undo it will need to tap it out at some stage

Edited November 3, 2014 by johnny5

[johnny5]

 Andy_Mac said:

For boost gauge i'm guessing?

Why not just the bov/bpv line

Ebc is running through there how much things can ya take off 1 line

[Guest]

 johnny5 said:

Why is it bad ?? Not sure if your familiar with v7 engines Loren but besidesthe bov and fuel reg thats pretty much it.. Although there is another that can be made but I snapped the bung off trying to undo it will need to tap it out at some stage

Is bov the one under the tb? One behind tb as well on mine.

What are you plumbing in dude?

Edited November 3, 2014 by evowrx

[Rosssub]

 evowrx said:

Is bov the one under the tb? One behind tb as well on mine.

Yip, the one behind TB normally goes to the purge solenoid.

[Guest]

 Rosssub said:

Yip, the one behind TB normally goes to the purge solenoid.

Gah throw that sh.t away.

[johnny5]

just a new boost gauge to be plumbed in had everything running off the BOV line but I wanna tidy it up a bit

[johnny5]

Maybe tis should have gone in the dumb question thread lol

[lachlan]

not teeing into the fuel reg line is internet gospel along with the "short shifters wear out synchros " and " no bov will wreck your turbo"

if you take it to the inth degree there is a glimmer of truth . in reality there are hundreds of thousands of cars doing it with no problem

[loner]

 loner said:

The fuel reg is one place I wouldn't splice into. Many other choices.

I wouldn't do it because if you bleed too much off, you'll run lean. That's my internet opinion anyway...

it probably means nothing since I'm not actually a real person... just a bot replying to questions.

[Guest]

 lachlan said:

not teeing into the fuel reg line is internet gospel along with the "short shifters wear out synchros " and " no bov will wreck your turbo"

if you take it to the inth degree there is a glimmer of truth . in reality there are hundreds of thousands of cars doing it with no problem

Glenn suckling teed mine together so map/reg read exactly the same. He knows more than cs does imo.

[johnny5]

Turbosmart actually recommend to tee off the boost gauge in the installation notes but I wanted to see if there was any truth in it being bad, all opinions are good but better if they are backed by real world results

[loner]

Being pessimistic... what is the worst thing that can happen if you T off the reg? To my mind,

the T'd off line could come off the back of the boost gauge, then bleed off enough boost to affect

the reg, but not enough to stop the car boosting. Which would mean running lean. How likely this

situation is, would depend on how the line was installed and the type of boost gauge etc... but

it has happened to me (with a previously installed gauge). The average mechanic might think that

situation is unlikely... but then it's not their car at risk.

[johnny5]

 loner said:

Being pessimistic... what is the worst thing that can happen if you T off the reg? To my mind,

the T'd off line could come off the back of the boost gauge, then bleed off enough boost to affect

the reg, but not enough to stop the car boosting. Which would mean running lean. How likely this

situation is, would depend on how the line was installed and the type of boost gauge etc... but

it has happened to me (with a previously installed gauge). The average mechanic might think that

situation is unlikely... but then it's not their car at risk.

Very good point indeed there Loren

[Guest]

The way i see it is the 6mm tube to boost gauge is jack volume and is already full of air so i doubt there would be any pressure differential between vac and 20 psi gauge vs plenum.

If youre concerned about that then at least move the feed for fuel reg to plenum vs runner as that would have a far bigger effect. With the reg feeding off runner fuji must have thought all runners/plenum were equal enough at all times to be well and truly safe and thats a far bigger volume than a 6mm tube.

[loner]

I'm talking about what happens when there is a failure though. If there are no leaks, then there are no problems.

But if there is a leak immediately before the reg... that would be pretty bad, so why increase the chances of that

happening by putting a T to a gauge there?

[Guest]

Ahhhk not how I was reading it all good that makes sense. Chances are slim of an issue wonder if the hose blowing off would leak enough to offset the fuel reg...not a cheap way to find out tho is there.

[Marky]

 lachlan said:

not teeing into the fuel reg line is internet gospel along with the "short shifters wear out synchros " and " no bov will wreck your turbo"

if you take it to the inth degree there is a glimmer of truth . in reality there are hundreds of thousands of cars doing it with no problem

+1

The hose to the boost gauge might leak, then again the 20 year of bit of factory hosing might perish at random too, as much chance of either happening

Just stick it wherever there's a fitting

If anything on a subaru the factory spot isn't all that ideal, put a real sensitive gauge on the fitting it uses and you can see it pulse with that cylinder filling up

[johnny5]

the turbo smart gauge has a special Tee with a boost pill looking thing in there the hole in it cant be more than a half a mm in size but its teed in and running sweet thanks for the help people

[lachlan]

tha resitrictor is to dampen gauge movement ,

if the line to the boost gauge falls off you are going to notice it before you boost it . problem solved .