Blasphemy101's E30 Build Thread
- blasphemy101
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Re: Blasphemy101's E30 Build Thread
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.Yoshi wrote:Ah yea. never had one of those.
- blasphemy101
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Re: Blasphemy101's E30 Build Thread
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)
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)
- Yoshi
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Re: Blasphemy101's E30 Build Thread
wait. how many reference ports does your WG have? 1? If you leave it/them unplugged, any pressure will open whenever it pleases.

Status: HG repair. 488wtq though!
- blasphemy101
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Re: Blasphemy101's E30 Build Thread
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
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
What do you mean about plugging things?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.
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Re: Blasphemy101's E30 Build Thread
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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- blasphemy101
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Re: Blasphemy101's E30 Build Thread
You're probably thinking of running a boost controller...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.

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
Hmm... maybe I should have plugged mine... lol

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- blasphemy101
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Re: Blasphemy101's E30 Build Thread
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
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
64lbers? Planning on making some real power eh?

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Re: Blasphemy101's E30 Build Thread
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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- blasphemy101
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Re: Blasphemy101's E30 Build Thread
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 lolYoshi 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"
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Re: Blasphemy101's E30 Build Thread
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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