E36 thoughts? (man!, not much traffic here)...

[JeffYoung]

Dan, if I wasn't clear, I meant 325s only.

Kirk, I agree -- I am assuming (perhaps wrongly) that the entire OBDI induction system including the manifold (the plenum, etc.) would transfer over. In fact, I suspect it HAS to to use the M50 manifold. Since ECU is now free, shouldn't be an OBDI/II issue with the rest of the harness, etc.

[buldogge]

All the E36 325 in ITS/ITR are OBDI and ALL have the same manifold...

The M50NV (non-VANOS) is 1992 only
The M50TU is the VANOS model from 1993-1995
*The above reside on the same spec-line*

The M52 is the 2.8l OBDII from 1996-1999
The S50 is the OBDI '95 M3 3.0l
The S52 is the OBDII 96-99 M3 3.2l

The M52TU is the E46 2.5l (99-00 323)
The M52B28 is the E46/Z3 2.8l
The M54 is the E46/Z3 3.0l
ALL of these are OBDII and Double VANOS

FWIW...The gains are not 15-20hp when swapping on an OBDII car...those are Dinan/Conforti type numbers for sure...there is a gain of course...but to realize greater gains requires larger injectors and a larger HFM (MAF) neither of which woulkd be IT legal anyway.

This is the exact reason I said the '95 M3 should be allowed in ITR...1995 ONLY uses the same 17.5# injectors as the 325's and the same 3" MAF (as does the 96-99 M3 FWIW). With the 17.5# injectors and no MAF swap the power differences will be minimal... .5l greater capacity and slightly hotter cams.

[JoshS]

All the E36 325 in ITS/ITR are OBDI and ALL have the same manifold...

The M50NV (non-VANOS) is 1992 only
The M50TU is the VANOS model from 1993-1995
*The above reside on the same spec-line*

The M52 is the 2.8l OBDII from 1996-1999
The S50 is the OBDI '95 M3 3.0l
The S52 is the OBDII 96-99 M3 3.2l

The M52TU is the E46 2.5l (99-00 323)
The M52B28 is the E46/Z3 2.8l
The M54 is the E46/Z3 3.0l
ALL of these are OBDII and Double VANOS

Oh, so close! Until you got to 1999 you were doing great.

M52B28: E36 2.8L from '96-'99 E36 328i and '97-'98 Z3 2.8.
M52tuB25: E46 323i and '99+ Z3 2.3
M52tuB28: E46 328i and '99+ Z3 2.8

M54B25: E46 325i and Z3 2.5i
M54B30: E46 330i and Z3 3.0i

[buldogge]

Looks to me like we're in agreement...

I just left out some of the Z3's...which is kinda funny given I'm an MCoupe guy...or maybe that's just it...MCoupe snobbery!

Oh, so close! Until you got to 1999 you were doing great.

M52B28: E36 2.8L from '96-'99 E36 328i and '97-'98 Z3 2.8.
M52tuB25: E46 323i and '99+ Z3 2.3
M52tuB28: E46 328i and '99+ Z3 2.8

M54B25: E46 325i and Z3 2.5i
M54B30: E46 330i and Z3 3.0i

[JoshS]

Looks to me like we're in agreement...

I just left out some of the Z3's...which is kinda funny given I'm an MCoupe guy...or maybe that's just it...MCoupe snobbery!

The real correction wasn't the Z3s, it was that the M52B28 was an E46 motor ... it was really an E36 motor.

I was just including the Z3s for completeness, especially because a lot of people don't realize that they have both E36 and E46 engines.

[buldogge]

I unfortunately simply left the TU out after the M52 in the second listing as I was following the M52TU 2.5l.

To clarify...M52B28 is E36 Single VANOS 2.8l and M52TUB28 is E46 Double VANOS 2.8l

Now we've have officially bored everyone...

The real correction wasn't the Z3s, it was that the M52B28 was an E46 motor ... it was really an E36 motor.

I was just including the Z3s for completeness, especially because a lot of people don't realize that they have both E36 and E46 engines.

[GKR_17]

The real correction wasn't the Z3s, it was that the M52B28 was an E46 motor ... it was really an E36 motor.

I was just including the Z3s for completeness, especially because a lot of people don't realize that they have both E36 and E46 engines.

And yet it was classed in ITR based on the E36 (single VANOS) numbers.

[JoshS]

And yet it was classed in ITR based on the E36 (single VANOS) numbers.

I wasn't involved, but I don't think that's true.

Looks to me like 193hp (double vanos engine) * 1.3 (30% multiplier) * 11.25 - 25lbs adjuster (no idea why, the other Z3s got -50 lbs) comes out to 2798, rounded to 2800, which is the listed weight.

If I start with 189hp (single vanos engine) I can't come up with any math that comes out to 2800.