Standard M3 to EVOII conversion

[france320isco]

Due to the fact that now I have a 2.3 s14 stock engine in my 320is I'd like to know exactly the OEM P/N and specs (like cams °) of all the parts I need to convert to EVOII 220hp and eventually some aftermarke direct fit.
It's difficult for me to surf RealOem w/o a direct indication of what is EVO0, 1, 2...

And going toward EVOII what is the best setup that get close to 220hp by new cams, but without losing low-mid range torque.

[ADA///M]

you have a 320is, i don't think you should chase so called "evo2" parts/results, just go with what works best and is easily found since you don't have an evo2 anyway.

You can probably find an evo2 cam for sale used, if you want. I believe its a 264 degrees (vs 248 stock). You can also go with a schrick 284/276 setup that's readily available. i believe evo2's also had the 48mm throttles, but I could be wrong.

I have no idea how to identify them unfortunately. Good luck!

[evommm]

It’s a very expensive chase

[france320isco]

you have a 320is, i don't think you should chase so called "evo2" parts/results, just go with what works best and is easily found since you don't have an evo2 anyway.

You can probably find an evo2 cam for sale used, if you want. I believe its a 264 degrees (vs 248 stock). You can also go with a schrick 284/276 setup that's readily available. i believe evo2's also had the 48mm throttles, but I could be wrong.

I have no idea how to identify them unfortunately. Good luck!

I own a s14b23 stock engine, i was also thinking to a 2.5 conversion, in the future, I don't really care what outside the engine

[france320isco]

It’s a very expensive chase

I got a perfect/refurished head so I could work it to EVO 2 or SPORT EVO specs (but I don't know e.g. intake/exhaust ducts diameter) I was starting from EVO2.

[evommm]

Become very friendly with your local bmw parts dealer
they would let you what’s available or NLA I have a feeling that many parts needed are not around anymore

[ADA///M]

I got a perfect/refurished head so I could work it to EVO 2 or SPORT EVO specs (but I don't know e.g. intake/exhaust ducts diameter) I was starting from EVO2.

I wouldn't worry about the terms evo2 or evo3, and just figure out what your goal is and work from there.

Do you just want more power without doing bottom end work? Get some schrick 284/276 cams, cam gears and evo3 valve springs.

You're just saying evo2 or evo3 but not stating what you really want.

Is this for a car that's street driven? How practical do you want it to be? How much money do you want to spend? Do you want to get into engine management changes? Airbox changes?

It's endless.

Figure out your goals, and then we can help you.

[hardtailer]

As said by others there are more effective ways to achieve higher power but see below what is required. It described the kit that Lifts power from 200PS to 220PS on a non-cat S14B23

http://www.s14.ctmnet.de/0095/01.jpg

Increase digit of jpg in link by 1 up to 10 to get All pages.

This describes the differences between evo and stock 200PS engine in more detail and mentions the throttle bodies as still46mm but mated to the larger intakes on the cilinder head etc.

http://www.s14.ctmnet.de/0022/0022_01.htm

(Right click the links to the other pages on above page and open in new window to load them)

Side note: the 320is already has the bigger lower half of the airfilter housing.

Currently the evo2 specific airhorns are listed in Germany

https://www.kleinanzeigen.de/s-anzeige/bmw-e30-m3-s14-ansaugtrichter-evo2-dtm-evo/2409657687-223-6640

As well as a 2.5l crank shaft brand new
For 2.2k € (incl shipping within Germany).

https://www.kleinanzeigen.de/s-anzeige/bmw-s14-kurbelwelle-2-5-e-30-m3/2424048300-223-8706

[france320isco]

I wouldn't worry about the terms evo2 or evo3, and just figure out what your goal is and work from there.

Do you just want more power without doing bottom end work? Get some schrick 284/276 cams, cam gears and evo3 valve springs.

You're just saying evo2 or evo3 but not stating what you really want.

Is this for a car that's street driven? How practical do you want it to be? How much money do you want to spend? Do you want to get into engine management changes? Airbox changes?

It's endless.

Figure out your goals, and then we can help you.

Just asking p/n of the same items (exhaust / intake manifold, downpipe, head, block, valves, etc.) from EVO 0 to 1 to 2 (only 2.3), and just a cam indication toward EVOII and the Sport EVO head differences, quite clear goals to me.

But the MAIN goal remains the first: to link BMW p/n to the torque/rpm/hp differences BMW stated/tested, because they do not set a mid-low rpm undriveable car on the street so I trust THEIR tuning

I don't want to discuss the (really endless, useless to me) not-BMW tuning topic, I wont ever mix things BMW didn't for anything different than ECU mapping (caution, too), don't want to end with an engine ringing as a classic phone when cold-wrong pistons call from the inside

If I was just looking for more Torque/HP I'd go to xxxxx here in Italy for a very reliable and tested "standard" 2.5 conversion or ask/compare in France @ xxxxx, they sell ready to use 300Hp s14 engines.

[jimmy p.]

Upgrading to Evo 2 spec is a worthwhile goal, but I think you will be scouring the classifieds for a while for the parts collection. Its pretty much all NLA.

Also BMW compromised the Evo 2 street cars with a retarded exhaust cam gear to gain back some of the lower RPM torque when then went to the larger inlets.
They increased the inlet cam to support that, but had to retard the exhaust cam to try and make it street drivable.

The Evo 2 homologated the larger 48mm TBs, Larger port head, the 50mm 2 piece header along with lightweight boot lid, the additional Gurney flap mounted on the boot lid, extended front air dam, the lightweight glass, and lighter bumpers (I think going by memory here I cant remember if the lighter bumpers were Evo 2 or Evo 3).
As with all E30M3s the street car was the afterthought, the main purpose was to homologate the parts they wanted for the race cars.

The inlet cam is easy, thats just a 264 cam, exhaust cam is as standard, the retarded cam gear is easy to find, no one really wants them because they kill top end.
The harder part is an original 2 piece header but they do come up sometimes as do real 48mm TBs, the real killer to find is an original Evo 2 head.

[HANDBLT]

Upgrading to Evo 2 spec is a worthwhile goal, but I think you will be scouring the classifieds for a while for the parts collection. Its pretty much all NLA.

Also BMW compromised the Evo 2 street cars with a retarded exhaust cam gear to gain back some of the lower RPM torque when then went to the larger inlets.
They increased the inlet cam to support that, but had to retard the exhaust cam to try and make it street drivable.

The Evo 2 homologated the larger 48mm TBs, Larger port head, the 50mm 2 piece header along with lightweight boot lid, the additional Gurney flap mounted on the boot lid, extended front air dam, the lightweight glass, and lighter bumpers (I think going by memory here I cant remember if the lighter bumpers were Evo 2 or Evo 3).
As with all E30M3s the street car was the afterthought, the main purpose was to homologate the parts they wanted for the race cars.

The inlet cam is easy, thats just a 264 cam, exhaust cam is as standard, the retarded cam gear is easy to find, no one really wants them because they kill top end.
The harder part is an original 2 piece header but they do come up sometimes as do real 48mm TBs, the real killer to find is an original Evo 2 head.

I think the real EVOII TB's were still a comprimise of some sort as well? I want to say either they were 48mm inlet, 48mm plates, but same size at the head or vise versa. They were different than the EVOIII 48's through and through.

T

[hardtailer]

Still 46mm throttle plates but port matched to the larger intakes in the cil head.