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Old 09-04-2012, 01:05 PM   #1
djelly84
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Default Oil/ Vacuum routing for track motor

Ok, so i'm trying to figure out what oil/vacuum systems are essential at a minimum for a track only car so that I know what I need on my 04 GDB with a EJ22t block/Ej207 V7 heads unning AEM.

See pics below for reference on how my engine is laid out.

I'm currently planning to by-pass the PCV system entirely, and just run one oil line from the crankcase breather (PCV) to my grimmspeed aos. And then run lines from the two head/valve cover breathers that tee off and go to the other port on my grimmspeed AOS. The intake port will either go to an additional catch can, will have a breather filter on it, or go to an intake tube once i make one for my 3071r etc.

For Vacuum, I will have my main brake booster line coming off the intake manifold, and that will have one tee on it which will go to the blow off valve(?). I will use one of the Intake manifold vacuum ports for the fuel regulator, and another for the air return on my 3 port boost controller. Anything else I need?

In terms of coolant, I've relocated the coolant expansion tank to where my AC was and have connected the bottom drain to where the coolant bypass pipe normally connects to. Turbo coolant return will go to the main inlet on top of this. Other inlet will be blocked off and small inlet will go to coolant overflow. I'm not using the throttle body coolant.


What do I do with the evaporative fuel line? can I delete the whole carbon canister and this line?

Anything else I'm missing?
Thanks for any advice. You will be helping out a first time engine builder in getting his longtime build finally done!





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Old 09-04-2012, 01:15 PM   #2
dirtslayer
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Based off what I've read, you should be fine with what you have done
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Old 09-04-2012, 02:05 PM   #3
jamal
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I prefer an AOS that is a nice big can. The one you have will spit a lot of oil toward the intake on track. The crawford one for example is how it should be done. And don't bother returning anything to the intake. Just have it dump into a bottle.
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Old 09-04-2012, 02:15 PM   #4
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Quote:
Originally Posted by jamal View Post
I prefer an AOS that is a nice big can. The one you have will spit a lot of oil toward the intake on track. The crawford one for example is how it should be done. And don't bother returning anything to the intake. Just have it dump into a bottle.
I approve this post. If this will be a track beast you may(most likely) will run into problems with the Grimmspeed AOS. People have seen much better track car results with the Crawford unit.
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Old 09-04-2012, 04:43 PM   #5
djelly84
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Yeah I was told that shortly after I bought the grimmspeed. It's Bnib so I might sell it used. The other option I'm considering is using my two port Cusco can and making a drain line back and tap into the top of the oil pan. I just dont know enough about the breather system and how g-force will affect blow-by to the heads etc. to design a good enough system myself.
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Old 09-04-2012, 04:53 PM   #6
jamal
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Well based on the pictures it looks like someone around there can fabricate so I'd recommend making one. Take a piece of 4" pipe, add some ports and a bracket and you're good. Ideally you would have some sort of baffle between the top outlet and everything else.
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Old 09-04-2012, 05:08 PM   #7
vicious_fishes
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oh my lawd look at those screamer pipes...

yes you can delete the factory evap system. check the weight reduction thread for a brief how-to.
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Old 09-04-2012, 05:50 PM   #8
djelly84
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haha thanks. Yeah I know I could just fab one, but I already have an old cusco one, so if I want to use that I could. I thought the design of the grimmspeed would be perfect...I was suprised to find out it isn't.


Forget the stupid catch can. Just wanted verification on the oil/vacuum/water routing as again this is my first engine build up, and the Suby evap system is complex and I want to make sure I'm bypassing it correctly. I'll check out weight reduction. Thanks peeps.
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Old 09-04-2012, 06:21 PM   #9
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the fuel evap can be eliminated. But the large hose in the rear and the small one that go into the metal y thing need to go to a small filter and if your real fancy a oneway check valve before the filter. That way you can fill up with no problem. Delete that coolant bull**** going through your throttlebody too.
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Old 09-05-2012, 10:27 AM   #10
Irv Weissmanhowerton
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I have the cusco catchcan that I tapped a 3rd hole on, so 1/3 is to the crankcase, 2/3 is t'd off the heads, and the lower, 3/3 line is routed to just dump to the ground down by the downpipe

anyone with those breather filters on the cc's I've seen a big mess in their engine bay from it, smells and full race car mode, but im sure is better, just divide off a little section so it doesnt get everything else under there all covered in oil if you do this
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Old 09-05-2012, 11:32 AM   #11
djelly84
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^ yeah, having it just dump seems like not the best idea for me. Its a track build and I would hate to be dripping oil all over the track. Currently how I have the Cusco CC is with the two ports for crankcase and heads, and a breather filter on top, what i'm thinking of doing is tapping the bottom and running a drain line down to top of the oil pan. I don't see why that wouldn't work correctly and catch all blow by, and drain oil back into the pan.
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Old 09-05-2012, 06:42 PM   #12
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The way the crawford setup works is to drain the bottom of the can back into the same top block pcv port. So there is a y-connection, with one line going to the bottom of the can and the other to the middle, so under load when there is crank pressure air is going into the can, while during decel it drains out the bottom back into the same place. You will still want an upper vent going into a bottle in case some makes it's way out, which it will. We had an unbaffled can vented back into the turbo inlet and it was pulling a ton of oil in on track just because of the turbo vacuum. After dumping it into a bottle instead we picked up 40whp due to not burning oil and not much ever made it's way into the overflow.

To answer your other questions

Quote:
Originally Posted by djelly84 View Post
For Vacuum, I will have my main brake booster line coming off the intake manifold, and that will have one tee on it which will go to the blow off valve(?). I will use one of the Intake manifold vacuum ports for the fuel regulator, and another for the air return on my 3 port boost controller. Anything else I need?
This sounds mostly ok. Dedicated line for the FPR that can't slip off is VERY important. You don't want to use the manifold as the return for the EBCS because under boost it won't work correctly. You can just leave the vent port open. All you'll need is the line for the brake booster, a line for the fpr, and a line for the bpv and boost gauge. You'll also want to plug the port for the PCV below the TB.
Quote:
In terms of coolant, I've relocated the coolant expansion tank to where my AC was and have connected the bottom drain to where the coolant bypass pipe normally connects to. Turbo coolant return will go to the main inlet on top of this. Other inlet will be blocked off and small inlet will go to coolant overflow. I'm not using the throttle body coolant.
What inlet were you planning to block off? Besides the main lines from the turbo and to the water pump you have a return to the top of the radiator as well as an overflow from the cap. I suppose you can cap the radiator return although it helps with bleeding the system. Yes ditch the TB lines, but if you are getting rid of the heater core run a loop of hose instead of capping them off. For some reason completely blocking off the heater lines interferes with coolant flow through the block and you may have overheating issues.
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Old 11-24-2012, 03:45 PM   #13
Scargod
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Default similar issues to what I am searching for a solution for

You might want to read my thread on catch-can/ventilation issues. I, too have a track-only car.

On top of what was discussed (and more related to my last post there), I am investigating pulling a vacuum on my crankcase by using the engine's exhaust.
This modification is not uncommon, and parts are readily available, [i]though they are not specific for a 2.5 liter turbocharged motor./I]
http://www.teglerizer.com/triumphstu...scavenging.htm
More here: http://www.eurospares.com/sucker.htm

Regarding this mod to my race car that I am contemplating, I feel I need the help of someone who is well-versed in fluid dynamics. Specifically, I want to add a tube to my exhaust that will pull a vacuum on the engine crankcase. This is proven to increase horsepower if done right.
However, I question the kit's design and efficiency and the last link, above, cites that tubing size can be overdone and another comment suggests best positioning. I wonder if the shape, size and recommended positioning (as comes with the readily available, standard kit installation guidelines), is optimal for our 2.5 liter engine.
Don't mean to hijack the thread, and I could sure start my own if there is interest, but I thought it might be cogent to what you are trying to accomplish.
How you deal with blowby in a racing motor is a whole different ballgame compared to a street legal car.
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