Sti Intake Ok

[BILLYBOY]

Can You Swap An Sti Intake To A Wrx Without A Excessive Oil Use Problem.i Have A New Sti Short Block New Heads With Fresh Valves.i Have A New Turbo ,tried 3 And All I Can Figure Is Maybe The Sti Intake Is Somehow Different Although I Dont Know How.anybody Have An Answer

[crazyhorse]

You mean the manifold? If so.. it's the same as the WRX it's just red

[BILLYBOY]

I Cant Figure What The Problem Is,anyhelp...maybe My Vents Are Run Wrong.it Seems To Have A Lot Of Blow Buy And Oil Puddles In The Front Mount Intercooler.i Have An Ecm Coming Becouse Its Not Supplying The Ground To The Air Flow Meter.the Car Wont Start Unless Its Unhooked And It Runs When I Supply My Own Ground But The Af Readings Never Change Couse Its Grounded.i Checked Continuity From Ecm To Airflow So Thats Ok It Has To Be The Ecm..what Do You Think About The Oil Usage?the 2.5 Short Block Came With Two Crank Vents.i Have Both Valve Covers Go To The Intake Tube In Front Of Turbo.one Crank Vent To Pcv And The Other On The Intake Tube.it Doesnt Smoke Out Of The Tailpipe But Seems Excessive What Do You Think.it Has Only About 300 Miles Do You Think The Rings Still Need To Seat???help Im Gona Loose My Mind

[Toophless]

The STI crank vents work like this. The rear vent under the turbo runs to the pcv, then to the intake tube. The small port on the pcv runs to the port that is just under the throttle on the intake manifold where it can see vaccum and boost.

The middle crankcase vent, under the throttle, runs to a T and then over to each valve cover.

The STi valve covers have 2 ports per cover. On is larger and is not baffled. One is smaller and is baffled. The T from the middle crank-case should run into each of the larger, unbaffled ports.

Then the smaller, baffled ports are the outlets that can run back to the turbo-inlet tube.

From any outlet port... i.e., the 2 crankcase vents and the small valve cover vents, you want the plumbing to run upward as far as possible, giving any oil that collects on the insides of the hoses a good chance to run back down into the motor. You don't want any spots that might puddle up and "bubble" inside the hoses.

[Toophless]

Also, stop capitalizing every word. :headscratch: You post looks like the longest book title ever. 8-)

[trev0006]

Thanks for the info.

Originally Posted by Toophless

The STI crank vents work like this. The rear vent under the turbo runs to the pcv, then to the intake tube. The small port on the pcv runs to the port that is just under the throttle on the intake manifold where it can see vaccum and boost.

The middle crankcase vent, under the throttle, runs to a T and then over to each valve cover.

The STi valve covers have 2 ports per cover. On is larger and is not baffled. One is smaller and is baffled. The T from the middle crank-case should run into each of the larger, unbaffled ports.

Then the smaller, baffled ports are the outlets that can run back to the turbo-inlet tube.

From any outlet port... i.e., the 2 crankcase vents and the small valve cover vents, you want the plumbing to run upward as far as possible, giving any oil that collects on the insides of the hoses a good chance to run back down into the motor. You don't want any spots that might puddle up and "bubble" inside the hoses suspensionbrakesbmwwheels.