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[ForcedFirebird]

You mean the round diag port? You can actually just jump a couple wires and skip the adapter....

[ForcedFirebird]

When welding to the floor last, I wiggle the structure around in the car. I've even used ratchet straps to pull it in far enough to weld, then spread it back. Really depends on the car - e30's are cake...

[ForcedFirebird]

We would see oil pan temps upwards of 300f on summer track days. We used to run Mobil 1 15w50 and would have a hot idle of about 8psi on a stock engine, changed to LiquiMoly 10w60 and we saw an ~8psi...

[ForcedFirebird]

The intermediate shaft is at the front of the engine, right next to the oil pump - If the tolerance is loose, then you are going to starve the rear of the engine.



Stock bearings...

[ForcedFirebird]

As much as I advocate TIG, the welds on the tacos for the main hoop (MIG ones) are more pleasing to the eye. I've tried it many times, but thin sheet to the thick pipe just amplifies any irregularities...

[ForcedFirebird]

I've passed this and your link for the ITB to a few fellow racers. GLWS....

[ForcedFirebird]

Check the little hose that goes from the top of the radiator to the expansion tank. Many times that is clogged and will give issues. Few years ago, I was racing at Road Atlanta....in the effing snow....and...

[ForcedFirebird]

^^^ c191 isn't on eta cars.

[ForcedFirebird]

The drive shaft must have both universals in phase. Your drive shaft had to come apart to change the bearing. If the center splines are even off one tooth, the car will vibrate. Seeing it's between...

[ForcedFirebird]

It was probably put together wrong. The universal joints need to line up (be in phase), and the giubo (flex disc) actually has a specific orientation. If your mechanic is not familiar with BMW, it's easy...

[ForcedFirebird]

Oh, the things I would see in the junkyards down here lol. "Florida man" is selling his e30 vert. :/...

[ForcedFirebird]

Can't tell by eye, unless they are totally wiped. Check the clearance on the intermediate shaft, but in all honesty, why would you rebuild and NOT change them? It's a few hundred bucks that could potentially...

[ForcedFirebird]

Toyota appears to be twin scroll, they just don't advertise it like BMW. https://www.ebay.com/itm/133654648734:



The flapper has been around since the e36 ;) I opened my shop...

[ForcedFirebird]

No, my suggestion isn't the "easiest", but it's not far.

In my experience, you will see anywhere from mid 250's to about 500whp depending on the turbo you select. A 58-60mm turbo...

[ForcedFirebird]

Crazy how similar they look on paper. The turbos are very close, curb weight is within 100lbs, peak tq and power are almost identical, wow. Amazing that these modern cars put out peak toque almost right...

[ForcedFirebird]

If you are starting with an eta car, adding the 885 is an upgrade. If you are starting with a b25, then it's best to keep it like that. Only in 1988 SETA, the 325e uses the same dome shape as the b25...

[ForcedFirebird]

Flat pistons and 885 head? That will do it....

[ForcedFirebird]

You are correct, I typed in reverse. :/

Yeah I did the math a while back and figured it wasn't worth worrying about.

[ForcedFirebird]

Have you done the math on that? Yes, it does retard the timing a bit, but my examples put down 180whp without messing with the cam gear. That's about 35whp over a stock b25.

If you rotate...

[ForcedFirebird]

But, but, but, you are "supposed" to have 8.5:1! lol

Hogwash. The more power your engine makes NA, will only be amplified by a turbo. Your tuning window just gets narrower as the...