Cleaning Up Vacuum/water Lines Behind Block

[Keeper]

While the engine is out and almost ready to go back in I thought I would tidy up the boost controller install from before which had me sitting my SBC-R in the position of the factory one near the battery. I used to get some pretty spikey boost at times so I have relocated the SBC-R to where the air filters are, I have a bit more room here now my washer bottle is where the battery USED to be.

Anyway the plan is to run the SBC-R off a boost pressure source on the turbo side of the engine, through the unit and back to the actuators without crossing the engine bay, saving roughly 2m of hose in the process.

The controller unit in the car requires a pressure feed to it as well, so I was going to take this off the underside of the plenum and run it direct into the cabin to save routing of hoses.

I am then left with the water lines for the turbo from behind the block, I no longer need three pipes running behind the block, so I was going to ditch the whole piece off and run a 10mm water hose from the bracket on the turbo side to the two connectors on the intake side of the block. This also alleviates the problem I have created with my read head oil drain.

Have attached badly done diagram

[DVS JEZ]

looks fine. make sure however u plug off the ends under plenum is over engineered and will never come off or leak. if you get a leak u will have to pull the motor again.

did you spill some paint from your engine stand to the rocker covers

[Keeper]

Thanks. The covers are a dark red from craved coating, iPhone camera sucks a lot tho

The ends under the plenum don't even really need plugging since no air will be passing thru them with this setup

Edited August 15, 2010 by Keeper

[jeffworld2]

are you getting the boost source for the actuators from the bov return line? (your red line) thats not right

That is the line to return the air "bled off" from the factory boost control into the metered airflow

If you want to get a compressor feed from the turbo side you pretty much need to drill and tap one on the "twin turbo" tube or intercooler hose

[Keeper]

are you getting the boost source for the actuators from the bov return line? (your red line) thats not right

If you want to get a compressor feed from the turbo side you pretty much need to drill and tap one on the "twin turbo" tube or intercooler hose

Damn that is true. I can see what I have done now, If I run a t-connector off the plenum then and use the same source as the in car controller sensor I should be right then. I don't really want to drill and fit a new nipple onto the turbo outlet piping.

[jeffworld2]

I would recomend drilling actually, so much simpler. there is even a lil dot on the pipe where you should do it.

[Keeper]

I would recomend drilling actually, so much simpler. there is even a lil dot on the pipe where you should do it.

On the "Twin Turbo" badged piping piece?

Would a bolt in nipple be fine or should I get one welded on?

[Keeper]

are you getting the boost source for the actuators from the bov return line? (your red line) thats not right

That is the line to return the air "bled off" from the factory boost control into the metered airflow

If you want to get a compressor feed from the turbo side you pretty much need to drill and tap one on the "twin turbo" tube or intercooler hose

damn, just thought, do I need to balance the BOV return piping with the intake plenum, I assume thats why that connection runs to there from the plenum in the first place

[jeffworld2]

Ok... I'll try and show whats happening. i am that bored.

Assuming your actuator solenoid has 2 ports to be used:

Generally you can block the small hose on the return pipe when fitting a 2 port actuator instead of the factory 3 port

[Keeper]

Ok... I'll try and show whats happening. i am that bored.

Assuming your actuator solenoid has 2 ports to be used:

Generally you can block the small hose on the return pipe when fitting a 2 port actuator instead of the factory 3 port

Thanks man, I posted the last post then left the house realising how retarded a question it was, if I had connected the BOV return pipes to the plenum I would have a continual boost leak through that hose.

I never realized the factory system vented back into the BOV pipes until you explained it then, the setup makes a lot more sense now than before.

I will plumb the red hose in my diagram to the turbo compressor outlet and plug up the BOV return pipe.

Will fix my diagram after and repost it to stop anyone using the wrong thing.

Thanks for your help.

[Keeper]

for the nipple/barb. do you mean use the cast markings an inch or so under the T on Twin on this piece? I'm assuming I should pay someone and get it welded in from the looks.

[Keeper]

water line behind block changed, with vacuum/boost lines GONE