Italian E36 M42, NA 197hp, 168ft-lbs, E30 S14 ITBs...

[Cristian G in Oz]

Sounds like something you'd hear among the big 8 cylinder muscle cars and not normally associated with 4 cylinder engines.

Your right about that. I couldn't believe the power loss when we started dynoing it.

We had to swap out the DTM style exhaust becasue when we tested the car the exhaust was to low to the road and would hit the track surface to much. We put the original Group A extractors back in and our loss before we retuned it was 40hp at the wheels.
Once we finished retuning it we got most of that back, but it cost us 4.5 hours of dyno time.

I can understand how the DTM M3s were getting significantly greater than 300 at the end of the E30 reign.

[Alpine003]

I can understand how the DTM M3s were getting significantly greater than 300 at the end of the E30 reign.

By "DTM Exhaust", are you referiing to the shorter side exit exhaust that's basically like a "L" shape? Do you know if those had any type of Venturi designed into it?

[Boyracer]

Here's bit more about the guy:

http://www.elaborare.com/htm/top_tuner/Gatti.htm

Seems that he has worked with BMW March F2 formula cars at the time in addition to touring cars. Too bad I don't understand a word

Maybe some of out italian members could call him and ask about the details of the engine :cool:

[SonomaGTLN2]

At the risk of reviving a 3 yr old thread, everything I have read about an M42 fitting s14 ITBs is that it can't be done because the overall intake port spacing is "over 3 inches" different...based on the pics in this thread, the spacing doesn't look bad at all...Just wondering if anyone knows of any developments over the past few years?

[nuvolarossa]

sorry I'm far from home where I have all my "technical data"

m42 bore spacing is 91mm
s14 is 100mm

but read here: http://www.e30tech.com/forum/showthread.php?t=78950

surely it can be easily done, but IMHO there are other better options.

PS: Jesus, my car is three years older than first post in this article! it's nice that I'm still in love with it

[DesktopDave]

I've always been wondering if we could fit some ITBs off an R1, Hayabusa GSX-R or Blackbird.  They flow enough air & fuel to support 200hp...with a standalone and a bit of alu welding...it'd be possible and it'd be cheap.

[Manndorfer]

Sorry for Picking up such an old thread. But I am interested in taking the itb of the s14 on the m42. Please no questions, why I dont take the s50 or dbilas itb. It is very simple. In german race regulation it is only allowed to take intakes from e30. So the only way is the s14 itb.
Can you send me pictures from the modified itb with the adapter plate? And modifications of the airbox. (I read about modifications, because of the brake system).
Thank you very much.
A last question i have: how much power and torque you can make with the itb? We have with series itb m42 207hp and 220nm right now.

[Warsteiner]

Manndorfer,

The pics are on the bottom of page 1.

Cheers,
~Ralph

[MoMansi]

i had the S14b20 three times, great engine, had the 46mm ITBs , great power band, the ITBs from the S14 would fit with custom work of cutting ,machining and welding, however, bare in mind the S14 is a totally different engine in design and intend for use, the least things we can think of are the 93.4mm bore vs the 84-85mm in the M42/M44 engines, the 38mm intake valves vs the 35mm in the M42/M44, the air box size, the runners length... many variables here, i doubt the drivability  will be acceptable if done.

[Freak]

i had the S14b20 three times, great engine, had the 46mm ITBs , great power band, the ITBs from the S14 would fit with custom work of cutting ,machining and welding, however, bare in mind the S14 is a totally different engine in design and intend for use, the least things we can think of are the 93.4mm bore vs the 84-85mm in the M42/M44 engines, the 38mm intake valves vs the 35mm in the M42/M44, the air box size, the runners length... many variables here, i doubt the drivability  will be acceptable if done.

M42/M44 intake valves are 33mm. 

[MoMansi]

yeah 33mm thanks, cheers

[MoMansi]

sorry if i'm posting in an old thread but i don't understand the reason some people see it hard to get over 100 HP/litre, the S14B20 is a 2.0 litre engine and gets 211Nm@4900 rpm and 192HP@6900 rpm.

so where did BMW choke those engines either it's an M42 or M44?

[MoMansi]

another point, the S14B20 also had a 10.8:1 compression ratio, so nothing crazy, but it required RON98 for its aggressive ignition maps and no knock or O2 sensors, pure mechanics and engineering.... the M42/44 series has more modern tech than those S14 old motors, they are also lighter....

[wazzu70]

The cams on the M42 are lacking. A good set of cams helps quite a bit!