The "Hose 10" Mod - BE/BH

[scoobygt]

edit: have now run a new vac line from the manifold to the air intake, line 10 sticking out of the guard I now have venting to atmo not sure if this is correct? boost has returned but still only have 8-9 psi on primary in 1st & 2nd but in 3rd I now have 14 psi on primary, which isn\'t bad

[Marky]

wait, what? haha

*all* you do is remove / block off that hose which is teed off from the bov hose

thats it

nothing with hoses from the guard etc, those ones are where your boost controller hides

i cant go check on mine sorry - im not using the factory boost control

i might have to edit the first post with a picture or something haha

"edit" - i see where its all gotten horribly confused

I\'m going to borrow a stock b4 (nick you wont mind) and rewrite the first post, with the factory boost control out of the picture you can do things quite different to with it in place - apologies for the confusion

[scoobygt]

the reason mine is so hard as it was a whorey set up when I first got it.. I\'m still trying to sort it out, pic\'s would be great

[Codex]

If I were you i\'d check the BBOD for deletes too...

[scoobygt]

nah that side of things is fine it\'s just around the area I\'m working with

[acidbath]

i think this is it

[scoobygt]

@Marky this is how I had my b4 set up.. just like the bg5a\'s

http://i70.photobucket.com/albums/i110/rabskyline/sequential_1.gif

[nickmcgill]

 Marky said:

I\'m going to borrow a stock b4 (nick you wont mind) and rewrite the first post, with the factory boost control out of the picture you can do things quite different to with it in place - apologies for the confusion

[nickmcgill]

I\'ve also noticed my VOD is incredibly better with this mod, Could be a combination of a few things but I basically always get the secondary opening up on 4k now. Used to be 5-6 previously.

[Greaver]

So this wont work on a BH5D?

My secondary doesn\'t come on till well after 5 so I would love some better response and an earlier spool on the secondary

[Kiwi_Fozze]

Bh5d has this already done

[broku420gtb]

I Just did this mod, Im now getting 12 primary and 15 secondary.. Is this safe because before i was getting 8 and 11... Car runs amazingly just scared ill break her... Its a 1998 B/H GTB with 160k.

[Rosssub]

12 & 15 is safe, factory should be 12-16 ish anyway AFAIK

[broku420gtb]

Sweet as, sounds good. I\'m pretty happy now

[Dairusire]

I\'ve litterally just seen this Time to have a fiddle with my car, and hopefully do this (aslong as someone hasn\'t done this before me)

[evljat]

Tried to install a BOV today and noticed something.

I don't think my Rev D has this done to it from factory.

There is a T-piece in the BOV hose and then that T's to a hose that goes into the manifold and hose 10 which comes from the passenger side.

It's set up like the top diagram acidbath posted.

Weird.

[B4 I was 250T]

I've just done this mod! Literally the most fun and best mod I've ever done! BOV actually sounds like a BOV and car does feel a lot smoother and more responsive. Boost is up too! Thanks Marky

[iphillipnz]

Just reverted back to normal rev a-c vac hose 10 setup for fuel economy reasons and my warm idle is sitting around 800-900rpm. This wasnt the case with hose 10 mod in use or before I first used the mod.

Have already done ecu reset but to no help.

[Marky]

What's the problem exactly? The idle sits like 100rpm high?

You'll probably see less economy this way - it's basically a boost leak and you'll need to use more pedal to go the same pace

[iphillipnz]

 Marky said:

What's the problem exactly? The idle sits like 100rpm high?

You'll probably see less economy this way - it's basically a boost leak and you'll need to use more pedal to go the same pace

Yeah just a high idle. Its kind of rough as well but it doesn't effect the manifold vacuum or rpm.

Im gonna revert today and see what happens.

[nickmcgill]

I'm going to do some testing with this again soon. Been running my car on this setup for the last year or longer when it was first posted.

I've since gone to a mines ECU and sometimes the boost is peaking at 19-20 PSI on the twins which is far too much for my liking.

If I revert back to the T piece I loose secondary boost all together, most bizarre.

[Rosssub]

 nickmcgill said:

I'm going to do some testing with this again soon. Been running my car on this setup for the last year or longer when it was first posted.

I've since gone to a mines ECU and sometimes the boost is peaking at 19-20 PSI on the twins which is far too much for my liking.

If I revert back to the T piece I loose secondary boost all together, most bizarre.

If going back to stock T piece, make sure all of the original restrictor pills are in the right lines. Otherwise all of the manifold boost pressure going into the BOV hose to hold the BOV shut, will be bleeding straight into the intake. So possible that the BOV is blowing open slightly dropping boost:

[nickmcgill]

My OEM hose didn't come with any pills in it at all actually, I might have to go and buy some.

- That might explain why this mod made such a difference initially.

[thermos]

Just bought a 99 bh5 auto. I've read every post here and it seems folks are on the fence as to whether this is a decent idea or not. Nick, did you end up deciding if it worked better with or without?

[Marky]

I'm struggling with how there is any negative aspect to it

However it is free, takes 30 seconds to do and is simple enough to make your own mind up about it