Blasphemy101's E30 Build Thread

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Re: Blasphemy101's E30 Build Thread

Postby blasphemy101 » Mon Apr 21, 2014 6:47 pm

Yoshi wrote:Ah yea. never had one of those.


It seems okay - the materials are pretty cheap, but the machining all seems good. I'm going to pull it apart and check it out anyways. Might as well take car of it as a possibility.
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Re: Blasphemy101's E30 Build Thread

Postby blasphemy101 » Wed Apr 23, 2014 5:36 pm

So I did something foolish, but it turned out alright for me... DO NOT try this at home kids.

After removing and inspecting my wastegate (it looks okay), I decided to disconnect the boost reference line from the wastegate. For those reading this - DO NOT DO THIS. I plugged the open reference line and went for a drive. I didn't run the car all the way up to red-line, but I ran it hard enough to confirm the spooling characteristics were the same.'

Of course, the turbo should have spooled up like crazy, right? I have one more wastegate spring I can try...

So possibilities (and why each is unlikely):

- pre-turbo exhaust leak (No other evidence (sound, soot, smell) of exhaust leak)
- wastegate is still being forced open by exhaust gases (9 PSI spring not enough? unlikely, but it is a 44mm gate)
- internal turbo problems (No other evidence, research produces little/no similar cases)
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Re: Blasphemy101's E30 Build Thread

Postby Yoshi » Wed Apr 23, 2014 5:49 pm

wait. how many reference ports does your WG have? 1? If you leave it/them unplugged, any pressure will open whenever it pleases.
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Re: Blasphemy101's E30 Build Thread

Postby blasphemy101 » Wed Apr 23, 2014 6:17 pm

From what I can remember (not home at the moment), it has two reference ports at the bottom and the atmospheric/vent one on top. The second reference port is plugged and the vent one is obviously open.
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Re: Blasphemy101's E30 Build Thread

Postby Yoshi » Thu Apr 24, 2014 12:24 am

I don't think it works like that for plugging things. But yea it seems like you had it hooked up right. unless you swapped them around.
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Re: Blasphemy101's E30 Build Thread

Postby blasphemy101 » Thu Apr 24, 2014 5:44 am

Yoshi wrote:I don't think it works like that for plugging things. But yea it seems like you had it hooked up right. unless you swapped them around.


What do you mean about plugging things?
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Re: Blasphemy101's E30 Build Thread

Postby Yoshi » Thu Apr 24, 2014 12:03 pm

I think plugging a vac port changes how the WG works in a way you don't want. Though your test was potentially dangerous anyway. God I forget all my turbo ish. Top port IIRC is the signal. you can leave the bottom one open but you're supposed to connect it somewhere ideally. Helps the WG seal.
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Re: Blasphemy101's E30 Build Thread

Postby blasphemy101 » Thu Apr 24, 2014 3:45 pm

Yoshi wrote:I think plugging a vac port changes how the WG works in a way you don't want. Though your test was potentially dangerous anyway. God I forget all my turbo ish. Top port IIRC is the signal. you can leave the bottom one open but you're supposed to connect it somewhere ideally. Helps the WG seal.


You're probably thinking of running a boost controller...

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I just ran my boost controller in-line from the boost source as a variable restriction; it worked fine, but I'm just running on spring pressure now to remove it as a variable.

Per Tial's site, the unused air ports should be plugged.

Not arguing - just clearing things up. I still haven't tried the stiffer spring. If that doesn't work, I'm going to rule the wastegate out...
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Re: Blasphemy101's E30 Build Thread

Postby Yoshi » Thu Apr 24, 2014 5:40 pm

Hmm... maybe I should have plugged mine... lol
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Re: Blasphemy101's E30 Build Thread

Postby blasphemy101 » Thu Apr 24, 2014 9:41 pm

Meh, wastegates are really simple devices, so I say if it works and controls boost reliably at the level you want, it's working. I've seen so many different ways of routing wastegate, BOV, and boost controller lines...
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Re: Blasphemy101's E30 Build Thread

Postby blasphemy101 » Fri May 09, 2014 8:42 pm

ARP Head studs and 64 lb/hr injectors are on their way. Wastegate issue is still present. Waiting for head studs before adding another wastegate spring stiffness.
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Re: Blasphemy101's E30 Build Thread

Postby M20_fever » Mon May 12, 2014 3:03 am

64lbers? Planning on making some real power eh?
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Re: Blasphemy101's E30 Build Thread

Postby Yoshi » Mon May 12, 2014 11:14 am

I ran 42 until I hit 400whp. Then I forget what I ran. Hopefully they are good quality ones. Otherwise they spit instead of mist. "atomization"
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Re: Blasphemy101's E30 Build Thread

Postby blasphemy101 » Mon May 12, 2014 1:28 pm

Yoshi wrote:I ran 42 until I hit 400whp. Then I forget what I ran. Hopefully they are good quality ones. Otherwise they spit instead of mist. "atomization"


We'll see. They won't be the best - they're rebuilt Bosch Type IIIs. I didn't realize you could make that much power on 42 lb. injectors. Everything I've read has indicated 58+ lbs for that much. Sounds like a went a little overboard, but I hopefully won't have to buy another set lol
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Re: Blasphemy101's E30 Build Thread

Postby Yoshi » Mon May 12, 2014 4:40 pm

I think you'll be fine. You usually don't have issues until you start getting WAY up in there for lbs/hr. 64s are the highest I would go before getting real aftermarket IDI injectors. EG IDI1000s. So sexy.
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