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2001 Impreza L | WRX swapped | Rust repairs and weight reduction!
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Old 01-21-2019, 10:57 AM   #891
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The joys of custom stuff
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Old 01-24-2019, 09:26 AM   #892
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Default 2001 Impreza L | WRX swapped | Rust repairs and weight reduction!

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The joys of custom stuff

Yea my fault for not looking into stuff enough

Original plan was to run this turbo in MAF or hybrid mode at first, and just keep using the factory BPV. But it was a lot easier just to switch to SD, so I quickly found a BOV that would attach right to my charge pipe like the factory BPV did. Just didnít realize it was small.

So I got a new BOV with larger piston size on the way. Should be here today. Hoping that fixes my surge issues. Then I can get into the higher rpm stuff for my VE table, and finally start adding more boost.

óóóóó


I made a new up pipe bracket. The factory one was in the way of the oil return from the rotated turbo. The return hose would rest on the bracket and rub no matter how it was ran. It also made the angle on the hose a tighter, which is not ideal for good drainage.

So I got a new bracket and chopped it up. Welded some pieces on to restructure it around the hose. Still need to go back and add more bracing on the one tab. Hard to tell the difference, but the hose angle is much better and no rubbing. Not very pretty but it works.

No, itís not touching the flange. Just looks close because of the picture.





And one thing I forgot to mention recently, is that I got a TIG. Was already sick of trying to MIG stainless and really wanted to be able to weld aluminum.

Still need more practice with it, but hopefully soon I can make a nicer downpipe, and re-do my fmic piping to eliminate most of the couplings. Fun messing around with it so far though

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Old 01-24-2019, 09:36 AM   #893
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Did you go with a v-band setup?

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Old 01-24-2019, 01:07 PM   #894
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Looks good!
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Old 01-25-2019, 05:07 AM   #895
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Default 2001 Impreza L | WRX swapped | Rust repairs and weight reduction!

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Did you go with a v-band setup?

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Yup. Once I re-do my charge pipe in aluminum Iíll weld the flange on.

For now, itís just gonna be hose clamped to the tube coming off the fmic pipe. The weld-on flange it comes with doubles as a hose adapter, because it has a lip on the end so you can use a hose & clamp if needed. Kinda lame I know, but itís only temporary.

Kinda see the lip here:



New on left.

You can see the difference in piston size. 1.5Ē compared to 1Ē on the other. Should let out air easier, hopefully preventing surge. The old one actually had a slightly smaller piston than the oem BPV. This should fix my issues.

Installed it yesterday but didnít drive the car yet. Too lazy in the week. Will test today after work.



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Old 01-26-2019, 02:28 PM   #896
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It's a piston party!
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Old 01-31-2019, 05:49 AM   #897
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Didít fix it.

Still getting surge.....but itís different. I think this bov could work, should flow enough, but Iím 90% sure the spring is too heavy.....and this specific bov apparently only has 2 fucking spring options. Gonna do one more test to confirm.

Most likely will re-do that section of my intercooler piping to put on a different bov that WILL work, and reposition it to fit better. That will also get rid of the section thatís stainless and heavy.

Even have plenty of scraps left over that I can make it for free. Always a bonus:



Either way, while I work on that, Iím pushing on with the tune because Iím impatient.

First, I put on some nice silicone hoses for the wastegate/bcs lines to get rid of the sketchy clear vinyl ones I had on temporarily.





After more testing at 5-10 psi, I finally started adding boost. Up to 15 psi now. Taking it slow, carefully working my way up the VE table. Starting to get an idea of the curve it wants.

Boost/wgdc is controllable and predictable so far. EWG seems to react the same as the IWG. I had pretty good success with the last setup at 20 psi, so I did the same thing and started with a zeroíd WGDC table. Start simple at first to hit targets, then adjust for spool later.

Video of 15 psi testing to show the boost gauge. More interesting than just posting a datalog. At 6,000 rpm itís pulling 265-270 g/s. Not bad for 15 psi and low timing. 20+ should be fun. Just gonna limit myself to maxing out the stock map sensor until I can get a built block in the car.

01 Impreza L, Borg Warner s257sxe 15 psi test - YouTube
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Old 01-31-2019, 06:02 AM   #898
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looks good so far. AFR's holding steady, boost holding steady. good job
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Old 01-31-2019, 08:08 AM   #899
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Iím kinda surprised how close the AFRís are so far, but still wanna tighten them up a bit. Seems like I might need a tiny bit more VE around peak load, and less after 6,000 or so. Need to test more rpm and boost to see if the trend continues
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Old 02-02-2019, 11:44 PM   #900
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Turbo's look so natural in that orientation.
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