M30 AFM AND 19lb injectors on m20
Moderator: martauto
Is it worth doing and whats involved?
what kind of benefits can you get by doing this swap
thanks
what kind of benefits can you get by doing this swap
thanks
325i sport tech 2, lach silver, 1989, BBS RS 16 split rims,
[URL=http://s878.photobucket.com/user/ETERNI ... 0.jpg.html][img]http://i878.photobucket.com/albums/ab35 ... 46cc30.jpg[/img
[URL=http://s878.photobucket.com/user/ETERNI ... 0.jpg.html][img]http://i878.photobucket.com/albums/ab35 ... 46cc30.jpg[/img
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jimbom30cab
- Tech 1 freak
- Posts: 7634
- Joined: Mon Oct 12, 2009 11:00 pm
- Location: in the garage
Yer agree, I tried it without a chip and had massive bore wash leading to no compression. If you can get a matching chip or good map then it will give some more noticeable power.
the only reason for this swap is because i am changing my afm, so just contemplating
325i sport tech 2, lach silver, 1989, BBS RS 16 split rims,
[URL=http://s878.photobucket.com/user/ETERNI ... 0.jpg.html][img]http://i878.photobucket.com/albums/ab35 ... 46cc30.jpg[/img
[URL=http://s878.photobucket.com/user/ETERNI ... 0.jpg.html][img]http://i878.photobucket.com/albums/ab35 ... 46cc30.jpg[/img
heaps of people have use bigger injectors and not bore washed them that isn't the problem, its the fact the calibration is wrongjimbom30cab wrote:Yer agree, I tried it without a chip and had massive bore wash leading to no compression. If you can get a matching chip or good map then it will give some more noticeable power.
E30 325is with M20B31
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Silverfang
- E30 Zone Regular

- Posts: 937
- Joined: Fri Dec 23, 2005 11:00 pm
- Location: Northampton
Why the need for bigger injectors anyway?
Unless you're going with some kind of forced induction, then the stock injectors are more than sufficient to cover the engine's demands, even with a BBTB, upgraded filter and cam in the mix.
If you're having performance issues, best to have the standard injectors cleaned by Injector-tune here on the forum.
Unless you're going with some kind of forced induction, then the stock injectors are more than sufficient to cover the engine's demands, even with a BBTB, upgraded filter and cam in the mix.
If you're having performance issues, best to have the standard injectors cleaned by Injector-tune here on the forum.
BMW and Opel, both RWD, both german, both good fun
http://www.clockservicing.co.uk/ For any clock repairs try here.
http://www.clockservicing.co.uk/ For any clock repairs try here.
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e30rapidic
- E30 Zone Newbie

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- Joined: Wed Jul 01, 2009 11:00 pm
- Location: Raleigh NC USA
for the M30 AFM, make sure you get the one ending in 027. The other part number needs to be fiddled with to get it "set" properly, not so much plug-n-play.
Someone I know dyno tested just the injectors and MAF "upgrade" and got a whopping 6 peak horsepower. I ran the injector/AFM setup with a BMP chip on my 2.8 stroker and will say it was noticeable.
Someone I know dyno tested just the injectors and MAF "upgrade" and got a whopping 6 peak horsepower. I ran the injector/AFM setup with a BMP chip on my 2.8 stroker and will say it was noticeable.
I have a awesome chip done by dmcl on here. Mapped very welle30rapidic wrote:for the M30 AFM, make sure you get the one ending in 027. The other part number needs to be fiddled with to get it "set" properly, not so much plug-n-play.
Someone I know dyno tested just the injectors and MAF "upgrade" and got a whopping 6 peak horsepower. I ran the injector/AFM setup with a BMP chip on my 2.8 stroker and will say it was noticeable.
I am contemplating a m30 afm and bigger injectors, and whether it is worthwhile just doing the m30 afm without injectors. Thanks for reply
325i sport tech 2, lach silver, 1989, BBS RS 16 split rims,
[URL=http://s878.photobucket.com/user/ETERNI ... 0.jpg.html][img]http://i878.photobucket.com/albums/ab35 ... 46cc30.jpg[/img
[URL=http://s878.photobucket.com/user/ETERNI ... 0.jpg.html][img]http://i878.photobucket.com/albums/ab35 ... 46cc30.jpg[/img
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jimbom30cab
- Tech 1 freak
- Posts: 7634
- Joined: Mon Oct 12, 2009 11:00 pm
- Location: in the garage
Yes you can do just the bigger afm but it myst be mapped right otherwise too much air is getting in and power drops off up the rev range
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hongkongfuey
- Mad-tango-geezer
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- Joined: Fri Jun 08, 2007 11:00 pm
- Location: portsmouth
I've done it with appropriate chip and works fine
if there wern't people like me,
with cars like mine,
who would you put down to make yourself feel better?
with cars like mine,
who would you put down to make yourself feel better?
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hongkongfuey
- Mad-tango-geezer
- Posts: 3304
- Joined: Fri Jun 08, 2007 11:00 pm
- Location: portsmouth
I've done it with appropriate chip and works fine
if there wern't people like me,
with cars like mine,
who would you put down to make yourself feel better?
with cars like mine,
who would you put down to make yourself feel better?
i had mine custom tuned with M30AFM and getting rid of it (replaced with a pipe) going to standalone made huge difference to midrange torque on a stroker engine didnt seem to gain much peak power though
E30 325is with M20B31
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hongkongfuey
- Mad-tango-geezer
- Posts: 3304
- Joined: Fri Jun 08, 2007 11:00 pm
- Location: portsmouth
mine was done by dmcl as well. mine has both injectors and afm. mine made 192.1hp and 189.9 lb/ft torque
if there wern't people like me,
with cars like mine,
who would you put down to make yourself feel better?
with cars like mine,
who would you put down to make yourself feel better?


