JRSC Vacuum Lines

[pinacup7]

Is this the correct way to have the vav lines routed.? I have a jrsc w/ bbk.

1. Hard plastic hose from Brake booster to bottom of Intake on big brass connector with provided 2' hose and clamps.

2. Metal PCV pipe (below coil) (20” hose) to center leg of T piece. Leave at back of firewall.

3. Connect 8” hose to 1 leg of T piece and connect to large fitting on TB inlet casting.

4. Connect 8” hose from last leg of T piece to large pipe on the Purge Valve (passenger side firewall).

5. Connect 16” hose from purge valve to small fitting on TB inlet casting.

6. From your pre-configured vacuum tree take 8” end and connect to Fuel Press Sensor (route below SC nose).

7. Take middle 6” hose and connect to fuel damper in center of fuel rail.

8. Take 11” pipe and connect to last fitting on TB inlet casting.

9. Blank off the second fitting on the back of the intake if you are installing a BBK. If not connect this fitting to the power card with the provided 30” hose. - I put my boost gauge here instead.

[Danny_C]

sounds about right, i asked this a few weeks ago, do a search type in vac hose layout it may help you.

[OJEngineeringSr]

Connect the 11" piece to the back of the intake manifold where the Powercard normally gets connected.

Cap the remaining fitting on the intake casting.

This modification will allow the fuel pressure sensor to see boost and keep fuel pressure more precise.

[jrssvt]

Oscar Jackson Engineering

Connect the 11" piece to the back of the intake manifold where the Powercard normally gets connected.

Cap the remaining fitting on the intake casting.

This modification will allow the fuel pressure sensor to see boost and keep fuel pressure more precise

Can u connect it to the same line u use for the boost gauage? Or does it have to be connect to the back of the manfold.

[Hocus Focus 2001]

Originally Posted by OJEngineeringSr

Connect the 11" piece to the back of the intake manifold where the Powercard normally gets connected.

Cap the remaining fitting on the intake casting.

This modification will allow the fuel pressure sensor to see boost and keep fuel pressure more precise.

is this change only good for when you upgrade to the BBK or will it work with the regular application?

[OJEngineeringSr]

Originally Posted by jrssvt

Oscar Jackson Engineering Can u connect it to the same line u use for the boost gauage? Or does it have to be connect to the back of the manfold.

You can connect to the hose that you run your boost gauge off of. The important thing to remember is that the fuel pressure sensor needs to see vacuum AND boost. Your boost gauge fulfills that requirement.

And yes, I recommend this for all JRSC kits. BBK or stock I recommend it. I had to route it to the inlet casting to meet CARB regulations. But the fuel system reacts better when it sees boost and vacuum.

[pinacup7]

so then where do you plug your boost gauge in?

[justjeff]

I have one of the first JR kits. In fact I have the Black ZX3 Focus that was the ZX3 JRSC test mule. My manifold only had one brass vac fitting in the back where as the new manifolds have two. I run lines to both my boost gauge and my Fuel Pressure Sensor off of that same location. I think it works fine.

so then where do you plug your boost gauge in?

[jrssvt]

Sweet we are all good now>>>>>>>>>>>>>
thanx oscar

[mattellermets]

sorry to bring this back from the dead, but you forgot to mention the vac. hose that runs from the bypass valve to the back of the intake manifold... right?

oh, i drew this up just now, i think this pretty well summarizes the correct "revised" setup

[Stolle]

THANK YOU! this will help a crapload!