Most effective engine mods on E30 M3?

 

It's not true, the E36 M3 engine has no AFM, but a MAF sensor...

(yes, I know: also the american version has a MAF sensor. Americans go to the EURO E36 M3 MAF on their american E36 M3 because of the bigger intake size, that brings about 10 HP).

Adwo

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Ah, so I was half right then (power)

Cheers,
James

To solve the "flap" problem on the standard AFM, I had heard that an American spec E36 3.0 M3 has no flap, and is interchangeable with the standard. Only makes an estimated 10BHP, but cheeper than the full blown conversion.

Not sure if this is true or not, anyone heard anything else??

James

I am sure i read an old marketing brochure when i had my first Evo2 that the valves were sodium filled for better cooling.

The inlet valves on Sport Evo are larger at 38.5 mm instead of the regular 38mm. I'll see if I can find out how big the Evo2 valves are, unless anyone knows.

Sport Evo cam duration is longer at 282 from 264

just going back to valve sizes and pirate pete's comment, i thought group a required standard valve sizes which is why bigger ones (which were sodium filled) were homologated on the sport??

anyone know for sure??

Andyboy, I have driven an M3 with the Splitsecond kit.
Even if the quality of the kit is second to none I wasn't very impressed with the performance. Just not enough bang for the bucks IMO. you still need a remap to get the full potential out of the MAF. I am sure if Andy O'Hara is reading this topic he can give some first hand expericence as he has owned a kit himself. He replaced it with a real Alpha-N (Motec)
here is the link
Split Second

Edited by UweM3

pete, how much is your clearance? Can't you machine the pistons to match. I know this is causing some more work,
but belive me it's well worth the effort.

I thought the sodium filled exhaust valves were only fitted to Evo Sport, and they're bigger too

is that right??

So, what are the exact differences between the regular 200 bhp car and the 215 bhp/220 bhp cars? Anybody know what the ECU numbers are on their cars inc SpEvo? (remove the trim panel under the steering column and look up at the ECU. Number begins with 0261)

Thanx!

Thanks John, food for thought. The Motec is pricey though. The main problem with the AFM is that the big alloy flap is a serious detriment to air flow. When my Dad owned AmD (you may have heard of them being a Porsche pilot now....) they did a conversion on the 1983 - 88 911 Carrera 3.2 which had Motronic. It was converted to an air mass meter similar to those used on cars like the E36 where a plastic tube has a heated wire - the more air that goes through, the cooler the wire gets and the ECU takes readings from this. This used to give excellent results - about 10 or 15 bhp from memory. Dad's semi retired now but always up to stuff - a decent air mass meter conversion for the E30 M3 at a fraction of the Motec cost?
By the way, the Sport Evo used the same air flow meter as the E32 730i/735i and the E34 530i/535i should anyone bullsh*t owners into thinking that it's a rare part! (It's an 0280 203 027)

What's peoples call on cams here, most say keeping the inlet / exhaust staggerd ie like std (or 284/272 etc) is the way to go. How does having equal inlet / exhaust cams ( 284/ 284)affect the engine charaterisics / powerband?