More air for the M20B20

[ALP1NA]

After I installed the excellent Speedtouch chip would be wise to provide my M20B20 engine more air, so I plan to incorporate more fluid injectors M50B20 and K & N filter, but I wonder who is the better choice, is it a 33-2059 or 57-0070?

http://www.knfilters.com/search/appsearch.aspx

If you still have some advice would be grateful.

[Cloggy Saint]

The panel filter will be the best option although it probably won't make much/any difference.

[Grrrmachine]

Both of the things you suggest doing will cause more damage to the engine instead of improving it. Fitting bigger injectors will just overfuel your engine, because your ECU has no way of knowing there's more fuel going in.

As for the K&N filters, they've been proved to reduce power on M20 engines. Get a decent panel filter, and ignore K&N altogether.

[ALP1NA]

As for the K&N filters, they've been proved to reduce power on M20 engines. Get a decent panel filter, and ignore K&N altogether.

Wiki (Common Upgrades) says opposite and who now believe?

http://www.e30zone.net/e30zonewiki/index.php/320i

[Grrrmachine]

Wiki says PANEL filter. K&N are more famous for cone filters, which are pointless, as the Wiki states here:

http://www.e30zone.net/e30zonewiki/inde ... 26N_Filter

[Cloggy Saint]

The OP was asking whether he should fit a K&N cone or K&N panel ....

[Grrrmachine]

Sorry, that wasn't mentioned since I don't know the codes.

I'll have to go through the Wiki and clear this up, since in the UK "K&N" automatically means "cone filter", it seems.

[Brianmoooore]

Also the rubbish in the wiki article about 'adjustable fuel pressure regulator' needs removing. All these do is crudely compensate for worn injectors - a sledge hammer approach which does nothing for balancing the injectors, makes injector leakage worse, increases fuel consumption out of proportion to any power gain, and promote bore wash and associated wear.

[HairyScreech]

As above, an adjustable pressure regulator doesn't belong anywhere near a fairly standard car.

Bigger investors from an m50 will just cause over fueling.
The b20 air filter is the same as the b25, the b25 needs a lot more air than the b20 so i don't think a stock b25 filter will be worried at all by a b20.

Pretty much save your money, there are only a few things that will help an m20b20 and big investors and an airfilter ain't on the list. O

[Grrrmachine]

Wiki's been cleaned up, and I've recommended the OP spend his cash on an injector refurb with Injectortune. Hopefully this will all work out well

As an aside, some parts of the Wiki are 4 years old and the info in there may have changed with time. I have a feeling bigger injectors, BBTBs and adjustable FPRs all fit into this category.

[HairyScreech]

Did you see my couple of corrections in the fao section boss?