Blasphemy101's E30 Build Thread

[blasphemy101]

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.

[blasphemy101]

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)

[Yoshi]

wait. how many reference ports does your WG have? 1? If you leave it/them unplugged, any pressure will open whenever it pleases.

[blasphemy101]

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.

[Yoshi]

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.

[blasphemy101]

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?

[Yoshi]

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.

[blasphemy101]

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...



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...

[Yoshi]

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

[blasphemy101]

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...

[blasphemy101]

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.

[M20_fever]

64lbers? Planning on making some real power eh?

[Yoshi]

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"

[blasphemy101]

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

[Yoshi]

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.