Inconsistent boost, trouble hitting targets - Page 2

STirish · 09-28-2005, 12:16 PM

Quote:

Originally Posted by drfrink24

Thats why an increase in WDGC and a decrease in relative boost is not making sense.

Boost leak somewhere, some how. You're loosing pressure and the ECU is trying to compensate. I would try to build a Home Depot pressure tester.

drfrink24 · 09-28-2005, 01:23 PM

Quote:

Originally Posted by STirish

I would try to build a Home Depot pressure tester.

Can you expand on this?

I have a compression tester, but, I don't know how I'd pressurize the system properly...

STirish · 09-28-2005, 01:35 PM

It would look something like this , but you would need it to fit inside the accordion hose that connects to the MAF. You will also need a compressor with a good regulator attached. You'll want to keep pressure very constant with no spikes.

Start at a low pressure and listen for leaks, slowly up the pressure until you can hear the leak(s). I wouldn't go much above 20psi total. You will hear funny noises, such as the oil bubbling.

drfrink24 · 09-28-2005, 04:46 PM

Well, I think I may have found it. Well, at least, confirmed what was in the pictures. I sprayed that part of the header with soapy water, and started it up.

Not only can I hear it leaking, I see bubbles form, and I can clearly smell exhaust. I would assume this could vent away at least 1-3 PSI (or more).

The thing that bothers me is I used new gaskets from subaru. Although, they were NOT the same as the old ones, they had all the dots on them. I also correctly torqued all the bolts to spec.

Hopefully, its not a warped flange.

Does anyone know how to get exact replacement metal style gaskets from subaru?

The uppipe isn't leaking, and I re-used those gaskets. I just cleaned them up with steel wool. Is this probably not a good idea for the header gaskets?

ride_the_pony69 · 02-10-2006, 01:38 PM

Quote:

Originally Posted by STirish

It would look something like this , but you would need it to fit inside the accordion hose that connects to the MAF. You will also need a compressor with a good regulator attached. You'll want to keep pressure very constant with no spikes.

Start at a low pressure and listen for leaks, slowly up the pressure until you can hear the leak(s). I wouldn't go much above 20psi total. You will hear funny noises, such as the oil bubbling.

so does this thing really work? How exactly do you hook it up?

09-28-2005, 01:35 PM	#18
STirish Spec C Club Car: '99 M3/'03 WRX Avant Fav Mod: Modification is wrong! Location: SLC, UT Posts: 1,026 Join Date: Sep 2004 Trader Rating: (6)	It would look something like this , but you would need it to fit inside the accordion hose that connects to the MAF. You will also need a compressor with a good regulator attached. You'll want to keep pressure very constant with no spikes. Start at a low pressure and listen for leaks, slowly up the pressure until you can hear the leak(s). I wouldn't go much above 20psi total. You will hear funny noises, such as the oil bubbling.

09-28-2005, 04:46 PM	#19
drfrink24 Junior STI Driver Car: JBP 04 WRX STi Posts: 197 Join Date: May 2004 Trader Rating: (0)	Well, I think I may have found it. Well, at least, confirmed what was in the pictures. I sprayed that part of the header with soapy water, and started it up. Not only can I hear it leaking, I see bubbles form, and I can clearly smell exhaust. I would assume this could vent away at least 1-3 PSI (or more). The thing that bothers me is I used new gaskets from subaru. Although, they were NOT the same as the old ones, they had all the dots on them. I also correctly torqued all the bolts to spec. Hopefully, its not a warped flange. Does anyone know how to get exact replacement metal style gaskets from subaru? The uppipe isn't leaking, and I re-used those gaskets. I just cleaned them up with steel wool. Is this probably not a good idea for the header gaskets?