Started the road to NA-T today

[akura]

I have finally begun my journey to become NA-T today. So far I've got the walbro 255 lph pump in, throttle body/y-pipe off, as well as the EGR. I still have to take off the valvecover/valvetrain and throw in a BL 2.5mm HG as well as BL 550cc injectors, ARP head studs, also doing the fuel dampening removal thang while i'm down there.

So when I'm done with all that, I'm going to install the manifold/turbo/bov/wastegate, run vacuum lines, etc. After all that I still have to install the MAP ECU, and Innovative Wideband. I plan on putting the AFR gauge for the wideband in the clock position, is there 12v power/ground in the connector for the clock? I've already got the boost gauge mounted and wires ran for it near the left vent.

Does anyone have any words of wisdom/caution? Where should I tap into for the MAP and boost gauge for best results? Does anyone have a MAP ECU table for NA 550cc injectors I could basetune off of? I'm sure I'm gonna run into a shitload of problems, but I'm glad theres a forum to get me through it (i hope).

Thanks in advance for all the help i hope you guys provide heh

[akura]

Can anyone tell me wtf this thing is? Its the valve looking thing between on the bottom right of both pictures. It has a good side (1 in maybe) opening and a small hose coming off of it. It is attached to the pipe returning from the intercooler toward the TB.

http://i12.ebayimg.com/03/i/04/45/89/b4_1_b.JPG

http://i1.ebayimg.com/02/i/04/41/24/af_1.JPG

[Brown Duckz]

I seem to identify it as a blow-off-valve.

[Dramon]

prolly pop off valve.

[akura]

Makes sense and sorta doesnt. I tried blowing air through the hose/opening and it was sealed, so you're probably right. But why would I need a plastic pos bov when i have a hks bov? (I bought the piping/etc used).

[Brown Duckz]

Makes sense and sorta doesnt. I tried blowing air through the hose/opening and it was sealed, so you're probably right. But why would I need a plastic pos bov when i have a hks bov? (I bought the piping/etc used).That's why you have it changed, and rewelded. :stickpoke

[scnat]

pos was probably the first bov that recir. then they got the hks and left the pos so the hole was covered

[SupaSupraSE]

pos was probably the first bov that recir. then they got the hks and left the pos so the hole was covered

That's what I was thinking.

[akura]

Found my first surprise as I got to the sparkplugs. The basin where the plugs are were bathed in oil, pretty much to the tip, all six. My first thought was that the valve cover gaskets were bad, but then as I went to take off the last sparkplug the socket wouldnt grab, I felt with my fingers and theres no hex on it, like it possibly sunk in. So now i'm stuck trying to figure out what caused the massive oil leak, the valve cover gasket or the sunken sparkplug.

[Jer]

Actually, the black item in those photos is known as a Bypass valve and is used widely on VW and Audi OEM turbocharged vehicles amongst many others. The term Bypass valve (BPV) is used interchangeably w/Blow Off Valve (BOV) which is incorrect. A BPV is designed to open and release pressure to a different (lower relative pressure) location in the intake manifold. It is not designed to vent to a zero pressure (atmospheric pressure) location and simply removing the hose will put too much of a pressure difference (Delta P) on the valve actuation unit (which is controlled by a vacuum pulse) which will cause it to fail prematurely. So, it was designed to be routed back into your intake whereas a BOV is designed to be vented to atmosphere. If you have it already setup to vent back into the intake you might see if it's a Forge unit. If so, it's a pretty sturdy aftermarket piece either available in black or silver that will work just fine.

HTH

[DTSupra30]

Actually, the black item in those photos is known as a Bypass valve and is used widely on VW and Audi OEM turbocharged vehicles amongst many others. The term Bypass valve (BPV) is used interchangeably w/Blow Off Valve (BOV) which is incorrect. A BPV is designed to open and release pressure to a different (lower relative pressure) location in the intake manifold. It is not designed to vent to a zero pressure (atmospheric pressure) location and simply removing the hose will put too much of a pressure difference (Delta P) on the valve actuation unit (which is controlled by a vacuum pulse) which will cause it to fail prematurely. So, it was designed to be routed back into your intake whereas a BOV is designed to be vented to atmosphere. If you have it already setup to vent back into the intake you might see if it's a Forge unit. If so, it's a pretty sturdy aftermarket piece either available in black or silver that will work just fine.

HTH



Owned lol good shit

Matt

[akura]

Thanks for the info Jer, I have the HKS SSQV as well as the BPV on the pipe. Is there any benefit in using them both? How does that work? If I just leave it as is (unconnected) the valve will just stay closed without a vacuum source right?

I got my MAP ECU off of Obiwan at SF, I told him I planned to run the map ecu with just a wideband 02 sensor, but he said the way that it logs data just makes it hell to tune or something to that effect. He obviously knows a shitload about it so who am I to argue.

Did any of you BL 550cc injectors? I bought them over at SF and was told that it was pretty much a direct swap. Now with the fuel rail out I see there needs to be a little modification for them to fit, and I guess I also gotta splice in new connectors (not to mention find).

[Brown Duckz]

Thanks for the info Jer, I have the HKS SSQV as well as the BPV on the pipe. Is there any benefit in using them both? How does that work? If I just leave it as is (unconnected) the valve will just stay closed without a vacuum source right?

I got my MAP ECU off of Obiwan at SF, I told him I planned to run the map ecu with just a wideband 02 sensor, but he said the way that it logs data just makes it hell to tune or something to that effect. He obviously knows a shitload about it so who am I to argue.

Did any of you BL 550cc injectors? I bought them over at SF and was told that it was pretty much a direct swap. Now with the fuel rail out I see there needs to be a little modification for them to fit, and I guess I also gotta splice in new connectors (not to mention find).You will need to use only one..... although it may be possible to use both and not have any serious issues.

[Jer]

Thanks for the info Jer, I have the HKS SSQV as well as the BPV on the pipe. Is there any benefit in using them both? How does that work? If I just leave it as is (unconnected) the valve will just stay closed without a vacuum source right?

I got my MAP ECU off of Obiwan at SF, I told him I planned to run the map ecu with just a wideband 02 sensor, but he said the way that it logs data just makes it hell to tune or something to that effect. He obviously knows a shitload about it so who am I to argue.

Did any of you BL 550cc injectors? I bought them over at SF and was told that it was pretty much a direct swap. Now with the fuel rail out I see there needs to be a little modification for them to fit, and I guess I also gotta splice in new connectors (not to mention find).

Don't run both. Pick one or the other and stick with it.

[Bromy]

I plan on putting the AFR gauge for the wideband in the clock position, is there 12v power/ground in the connector for the clock?

Not too sure about yours, but i have the AEM wideband, that needed a switched 10 amp supply, i tapped into the cigarette lighter wire which is 15amp and used a 10amp inline fuse, hope this helps

[akura]

Just thought I'd give you guys an update where I'm at. Headgaskets on, injectors are in, and now I'm just in the process of finishing running intercooler pipes (man that is a bitch) and putting the throttle/body and y-pipe on.

Theres two lines I'm having problems figuring out where they go. Under the throttle body, circled in the picture, is a fitting for a (coolant?) line, and I have no idea where mine is. Could someone tell me where the other side of the hose attaches to? In the other picture, where does the line circled on the intake manifold delivery assembly go to?

http://i12.photobucket.com/albums/a247/obtiger/9iw8io.jpg

http://i12.photobucket.com/albums/a247/obtiger/missingline.jpg

[dejacky]

Would you like the entire manual set for your car? It might help :).

[Bean]

Actually, the black item in those photos is known as a Bypass valve and is used widely on VW and Audi OEM turbocharged vehicles amongst many others. The term Bypass valve (BPV) is used interchangeably w/Blow Off Valve (BOV) which is incorrect. A BPV is designed to open and release pressure to a different (lower relative pressure) location in the intake manifold. It is not designed to vent to a zero pressure (atmospheric pressure) location and simply removing the hose will put too much of a pressure difference (Delta P) on the valve actuation unit (which is controlled by a vacuum pulse) which will cause it to fail prematurely. So, it was designed to be routed back into your intake whereas a BOV is designed to be vented to atmosphere. If you have it already setup to vent back into the intake you might see if it's a Forge unit. If so, it's a pretty sturdy aftermarket piece either available in black or silver that will work just fine.

HTH

Well in an ideal turbocharger system, a bypass valve is completely useless then :) Because there's either pressure (which with a good intercooler setup is within 2psi from what the turbo delivers at the compressor wheel to what is seen in the intake manifold) or there's atmospheric pressure (which you find at the intake (or before the throttle body if its closed)

I think that unit is a blow off valve. Some blow off valves have a vent made to vent into a spot in the intake tract with atmospheric pressure YET as already been metered by whatever metering system available. (With AFM based systems, this is after the AFM sensor itself... in MAP systems it doesnt matter). And some BOVs have no venting system... they just vent to atmosphere. This one is designed to vent into the intake tract with no pressure. How do I know this. Look at paragraph one :)

BOV and BPV are pretty much coined as the same thing almost. Sorta like down here in the south you say you want a "coke". That simply means you want a carbonated beverage, not from the coke brand itself ;)