Vac nipple for wastegate suggestions?

[180fan]

Ok, so I've got an aluminum hotpipe and custom made IC pipes for my fmic setup. Now my dilemma is this, the local welding shops aren't willing to put a nipple that small on an aluminum pipe since it's very easy to break off. Any suggestions as to where to run the line for the vac that'll feed the wastegate acuator or should I just suck it up and get the HT steel pipe with the nipple on it already? The buying another hotpipe I'm willing to do reluctantly since I've already got a hotpipe and don't see much of a point in buying the same part twice if I don't have to...

[9240sx]

Can you use a port off the throttle body?

[boost_creep]

from what ive read,its not good to tap off the throttle body.im in the same boat as you,but i dont have a front mount.very soon though,but i do have an aluminum hotpipe.what i planned to do is drill a small hole and thread a brass fitting with a nipple on the other end.and of course use some threadseal.but lets see what other ppl think.

[Jesse SR20]

what i planned to do is drill a small hole and thread a brass fitting with a nipple on the other end.and of course use some threadseal.

That's all Heavy Throttle does with their hotpipe.

Don't bother buying HT's hotpipe, just modify yours. I bought a HT hotpipe, and was displeased with it's quality. Their machine shop failed to clean out all the metal shavings from the bov hole before powdercoating. There were shavings all over the inside of the pipe that could literally be brushed loose by hand. Not good.

[180fan]

Awesome. Thanks for the suggestions guys!

[Taylor_Durdan]

why run your boost source from your pipes?

your piping actually charges up before the manifold so your wastegate opens prematuraly, thus taking away alot of drivebility. use the larger of the two vacuum ports above the throttle body as your boost source. the wastegate doesnt open as soon and the car feels a million times quicker! i had a sidemount for ahwile on my old setup and was using the factory nipple of my sidemount piping. i also had a screamer pipe on my turbo so you could hear when exactly the wastegate was opening. i decided to try and change where i got my boost source from and used the port above the throttle body and capped off the one on the pipes. and WOW! what a difference. i strongly recomend on a FMIC setup to run your boost off the ports they provide for you on the intake manifold. just dont use the one under the throttle body, in fact. cap it off.

[slow s13]

you can have the shop weld on a pad to the pipe then drill and tap that

[VitaminT]

http://www.atpturbo.com/Mercha...e=BCS

I had a local shop drill and weld a aluminum nipple to my hotpipe.

[S13240]

why run your boost source from your pipes?

your piping actually charges up before the manifold so your wastegate opens prematuraly, thus taking away alot of drivebility. use the larger of the two vacuum ports above the throttle body as your boost source. the wastegate doesnt open as soon and the car feels a million times quicker! i had a sidemount for ahwile on my old setup and was using the factory nipple of my sidemount piping. i also had a screamer pipe on my turbo so you could hear when exactly the wastegate was opening. i decided to try and change where i got my boost source from and used the port above the throttle body and capped off the one on the pipes. and WOW! what a difference. i strongly recomend on a FMIC setup to run your boost off the ports they provide for you on the intake manifold. just dont use the one under the throttle body, in fact. cap it off.

So you have your top left nipple going to your fpr and boost gauge while you have the top right nipple(bigger one) going to the bov and boost controller?

Kinda off topic, but can't one use the small vacuum nipple under the throttle body as a vacuum source for a boost gauge?

[VitaminT]

Seems like one of those nipples only reads VAC and not Boost. I could be wrong on that though.

[Taylor_Durdan]

the one under the throttle body is boost only, its before the throttle body, so it doesnt iven read acurate manifold pressure

[slow s13]

heres a pic of the pad I had welded on.

[9240sx]

why run your boost source from your pipes?

your piping actually charges up before the manifold so your wastegate opens prematuraly, thus taking away alot of drivebility. use the larger of the two vacuum ports above the throttle body as your boost source. the wastegate doesnt open as soon and the car feels a million times quicker! i had a sidemount for ahwile on my old setup and was using the factory nipple of my sidemount piping. i also had a screamer pipe on my turbo so you could hear when exactly the wastegate was opening. i decided to try and change where i got my boost source from and used the port above the throttle body and capped off the one on the pipes. and WOW! what a difference. i strongly recomend on a FMIC setup to run your boost off the ports they provide for you on the intake manifold. just dont use the one under the throttle body, in fact. cap it off.

Im going to try this out,Will let you know how it works for me.

[cholojr19]

I had this same problem cause I had a greddy profec b 2 boost controller. I bought a brass barb fitting in home depot (plumbing aisle) was like $3 and drill a hole in my aluminum hot pipe and used jb weld from autozone works perfect. And only costs about $10 just need a drill bit a size smaller then the fitting, the barb fitting, and jb weld its easy

[Onizuka]

There seems to be some confusion...

For electronic boost controllers:

Your boost controller solenoid(3) should be connected right after the compressor housing on the turbo because it tends to be closest to the wastegate actuator(4), the short hoses increase wastegate response.

Now, the control module(2) should get its signal from the intake manifold just like a boost gauge(1). The blow-off valve(5) also gets its signal from the intake manifold.

[9240sx]

why run your boost source from your pipes?

your piping actually charges up before the manifold so your wastegate opens prematuraly, thus taking away alot of drivebility. use the larger of the two vacuum ports above the throttle body as your boost source. the wastegate doesnt open as soon and the car feels a million times quicker! i had a sidemount for ahwile on my old setup and was using the factory nipple of my sidemount piping. i also had a screamer pipe on my turbo so you could hear when exactly the wastegate was opening. i decided to try and change where i got my boost source from and used the port above the throttle body and capped off the one on the pipes. and WOW! what a difference. i strongly recomend on a FMIC setup to run your boost off the ports they provide for you on the intake manifold. just dont use the one under the throttle body, in fact. cap it off.

Ok,I did it and he's right the turbo spools a bit faster,about 300-400RPM's faster,And the turbo acts different it spikes at 9psi and then stays at 8psi.I like the feel of the car better now.What i did was run one line from the larger port on the right to my bov and put a T and ran a line to the wastegate.Thanks,for the tip Taylor_Durdan.