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Old 05-29-2019, 06:07 PM   #26
vica153
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You have a boost gauge, so are you overboosting or not? I'm confused how you can be unsure about this.
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Old 05-30-2019, 01:18 AM   #27
binny
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Quote:
Originally Posted by car_freak85 View Post
A post-MAF/pre-turbo intake leak won't affect anything? Surely you jest, sir...

Or were you talking about battery voltage?
Intake silencer box? Before the air filter and MAF does nothing on these older Subaru's

You can run it without a filter at all (just the MAF) and they run fine
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Old 05-30-2019, 03:13 PM   #28
car_freak85
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Quote:
Originally Posted by vica153 View Post
You have a boost gauge, so are you overboosting or not? I'm confused how you can be unsure about this.
It's difficult. I can't data log at the moment and the car is fast enough that it makes it tough to take your eyes off the road for very long doing WOT pulls in 3rd/4th gear. When I have been able to look, or had a passenger watching for me, it did not appear that the engine was overboosting. Clearly I need to do more research to nail this down.

I'm sure the throttle cable is hurting the situation, and that is the next part I need to tackle. I've got no problem driving around at my 10 psi low-boost setting for the short term, but it would be great to be able to run this thing at the stock 14 psi.

Quote:
Originally Posted by binny View Post
Intake silencer box? Before the air filter and MAF does nothing on these older Subaru's
This is between the MAF and the turbo. You can see it just in front of the yellow brake master cylinder cap in this photo (NOTE: NOT my car, pic stolen for reference):

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Old 05-30-2019, 04:34 PM   #29
vica153
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Oh yeah the plastic nipples on that are prone to cracking and snapping off when you forgot to disconnect the small hoses when you remove it. It is the same part on the EJ22T in the US. You can replace it with any sort of cylinder and put some fittings on it. "Coffee Cup Mod". The taper of the average coffee cup was found to fit quite nicely.

Last edited by vica153; 05-30-2019 at 05:01 PM.
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Old 05-30-2019, 05:23 PM   #30
car_freak85
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Yes, one of the nipples snapped off and I need to plug the hole, not just tape over it.

The part number that is molded into the EJ20G silencer doesn't match up with the USDM EJ22T engine, and is not a valid part number in the US parts catalog.

I've looked into the coffee cup mod, but it's actually hard to find a mug that fits, all the links in the various threads are dead and images have long since had their links broken and forgotten. Plus, the inlet hoses don't line up, they're offset by an inch or so putting extra strain on the filter-housing-to-silencer elbow.

For now I'll just epoxy the hole closed (it's unused currently).
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Old 05-31-2019, 01:19 PM   #31
car_freak85
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Filled the hole in the silencer yesterday. It didn't appear to be leaking, but the epoxy should cross that off the list once and for all.
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Old 06-02-2019, 06:32 PM   #32
binny
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Quote:
Originally Posted by car_freak85 View Post
It's difficult. I can't data log at the moment and the car is fast enough that it makes it tough to take your eyes off the road for very long doing WOT pulls in 3rd/4th gear. When I have been able to look, or had a passenger watching for me, it did not appear that the engine was overboosting. Clearly I need to do more research to nail this down.

I'm sure the throttle cable is hurting the situation, and that is the next part I need to tackle. I've got no problem driving around at my 10 psi low-boost setting for the short term, but it would be great to be able to run this thing at the stock 14 psi.



This is between the MAF and the turbo. You can see it just in front of the yellow brake master cylinder cap in this photo (NOTE: NOT my car, pic stolen for reference):

Ah get rid of it with a straight pipe
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Old 06-04-2019, 03:17 PM   #33
car_freak85
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EJ205

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Quote:
Originally Posted by binny View Post
Ah get rid of it with a straight pipe
Yeah, I'm looking for a sanitary solution. The pic I linked to makes the two rubber elbows look much more inline with one another than they really are, with different IDs to boot. I bumped my WTB: coffee cup mod thread on Legacy Central.
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Old 06-10-2019, 03:37 PM   #34
car_freak85
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EA63 , EA81T, EJ20G,
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Spent several hours chatting with the original builder of the car at The Old School Reunion yesterday. Going to be overhauling the pedals and throttle cable, hope that clears this up...
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Old 06-12-2019, 03:55 AM   #35
binny
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Unlikely but think positive have you checked the ECU voltage? It could be a crappy main ECU relay
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Old 06-12-2019, 04:35 PM   #36
car_freak85
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EA63 , EA81T, EJ20G,
EJ205

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Quote:
Originally Posted by binny View Post
Unlikely but think positive have you checked the ECU voltage? It could be a crappy main ECU relay
If I can't even get WOT with this cable, but I've adjusted the EBC to hit the stock 14 psi on the high boost setting, it is VERY likely that I'm over-boosting. This will at least remove another (fairly significant) variable from the equation.

Hmmmm, gonna have to find a wiring diagram, no idea what pin that might be... Should be 12V? 5V?
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Old 06-13-2019, 11:41 PM   #37
binny
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Should be 13 - 14 v
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