3sgte vac/coolant lines, from/to where? Options

[6gsillyca]

Where does this vac line run to/from? The one with the phillips pointed at it. It is labelled "3" and goes from the intake manni to a metal bracket attached to the fuel rail. I'm 99% sure it attaches to a T coming from my FPR, and shoule look like the 3rd pic. Is that correct? Can I eliminate the meat bracket attached to the fuel rail, and just run vac line from intake manni to the T?










And these coolant lines run to the TB. Which one attaches to which nipple?

[lagos]

That vac line goes to a metal tube, that then goes to your stock fpr. Since you have an aftermarket fpr, you can just run that line directly to it.

As far as the coolant lines go, it doesnt really matter. just hook them up to the throttle body.

[6gsillyca]

Thanks. I wasn't sure if the metal tube was signifigant to the performance of the car at all. I wanted to delete the bracket behind the fuel rail.

So the coolant there isn't a "feed" and "return" pathway through the tb?

[lagos]

So the coolant there isn't a "feed" and "return" pathway through the tb?

There is, but Im not sure if the direction really matters. Ive always just hooked them back up based on how the hoses seem like they would be laid out when connected to the tb, and I never had any issues with it.

All it does is help keep your tb from freezing in the winter.

[6gsillyca]

How hot does it get next to the fuel rail? Would my rubber vac line be ok if I just ran it where the metal one was?

[lagos]

How hot does it get next to the fuel rail? Would my rubber vac line be ok if I just ran it where the metal one was?

Hard to tell. It gets pretty hot there, but then again that hose can take some heat.
If i were you i would route it away from anything and take the tee off. The fpr vac line is REALLY important.

[6gsillyca]

I was probably going to route it along the firewall, but why should I take the tee off? Actually to be honest I don't even know what the other tee is for. It runs through a grommet in the firewall into the car...

[lagos]

It goes to your greddy boost controller.
I never tee into the fpr line, for the simple fact that a vac leak along the way would mess up the vac/boost that the fpr needs to correctly raise fuel pressure.

[6gsillyca]

What should I use to re-tee into? I don't know what lines a boost controller uses/needs for signals. BTW the vac line for my boost controller also has a round thing, just after the fork. Do you know what that is?

[lagos]

The round thing is just a filter.
You can use any vac lines going from the intake manifold. If your not sure, pull them off with the car running and feel for vacuum.