Tech Forum : Bosch fuel injection part from a Porsche

MayanArch

Posted Wednesday, Mar 2nd 2:57am [Edit] [Quote] [IMS] [View car]

Member
Post nr. 231

Florida, USA
Baur E21 2.7 1982, Baur E30 318i 1985, 323i 1978

I have heard that the Bosch fuel injection from an e21 323i can be upgraded by using a part from a Porsche.

I have heard two people mention this, but have never been able to find out what part they are talking about.......and from what Porsche.

velocewest

Posted Thursday, Mar 3rd 4:05am [Edit] [Quote] [IMS] [View car]

Member
Post nr. 444

Oregon USA
e9, e12x2, no E21?

I believe this would be the fabled 84mm air flow meter. Use search, there was a HUGE thread on this not that long ago. Same on the Yahoo e21 board.

Tony

JJG323

Posted Thursday, Mar 3rd 5:15am [Edit] [Quote] [IMS] [View car]

Member
Post nr. 501

Reading MA USA
1979 BMW 323i

Yeah,

I went into great detail about this and Ray and everyone said I discusssed ad nuaseum LOL.

Basically its the porsche flapper and fuel distriubtor from a 2.8 liter early 80s carrera.

I finally will be known as the guy who hounded Jack Roberts so much I actually got the part numbers of his mythical 84mm creature.

I stated the part numbers in the prior thread and I will try to dig it up.

***************************************************
(K - jet flapper aseembly part number is 0 438 120 149 according to Jack)

Here is the number for the fuel distbutor - accoridng to Jack:

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Joe, the fuel dist that matches the 149 flapper assembly is Bosch part #
0 438 100 077.
Cheers,
Jack

later,
J

MayanArch

Posted Friday, Mar 4th 5:31pm [Edit] [Quote] [IMS] [View car]

Member
Post nr. 236

Florida, USA
Baur E21 2.7 1982, Baur E30 318i 1985, 323i 1978

J,

Thanks a bunch. I tried looking up the previous post, but didnt find it.

I guess my question is how this part will improve horse power or performance. Is it easy to maintain, adjust, and install.....since you will be caught between Porsche and BMW mechanics?

M42powered

Posted Friday, Mar 4th 6:48pm [Edit] [Quote] [IMS] [View car]

Staff
Post nr. 466

Arizona, USA
1981 BMW 320i

Don't frett, I can't find that porsche thread either. I typed "porsche" into the search engine to find all posts containing that word. None of them are the thread in question.

JJG323

Posted Friday, Mar 4th 7:55pm [Edit] [Quote] [IMS] [View car]

Member
Post nr. 506

Reading MA USA
1979 BMW 323i

I could not find the thread for some reason either, but it was so important to me I saved it in my BMW email.

This is info the Ray and I have been asking for years on various forums like Roadfly.
We have heard for years that the 84mm flapper existed but it was like a unicorn and Jack was never pinned down on EXACTLY what they where.

Thats why this time I hounded him.

The parts numbers that I gave the group come from Jack Roberts a BMW guro like Ray or Marquis.

This should be all you need for a more powerful m20 (240hp) engine since the porche 80s era 2.8 liter ones made lots of HP and torque. It goes on like stock. No problems.

Regards,
J

RDAvena

Posted Friday, Mar 4th 7:59pm [Edit] [Quote] [IMS] [View car]

Staff
Post nr. 1098

SELECT * FROM users WHERE clue > 0
1981 323i, 1988 545is, 1997 528i

you can get the same performance from a regular 911 2.7l Kjet assembly as well. The 84mm flapper is really not necessary. If Porsche could do the same HP with an 80mm flapper what prevents the m20 from doing the same.

Marquis_Rex

Posted Friday, Mar 4th 8:54pm [Edit] [Quote] [IMS] [View car]

Member
Post nr. 231

UK
BMW 323i 2.7-as featured in Total BMW Nov 2002,Porsche 911/993TT

JJG323 wrote:

The parts numbers that I gave the group come from Jack Roberts a BMW guro like Ray or Marquis.
.....

J

Thanks

Never been called a Guru before

MayanArch

Posted Friday, Mar 4th 9:24pm [Edit] [Quote] [IMS] [View car]

Member
Post nr. 237

Florida, USA
Baur E21 2.7 1982, Baur E30 318i 1985, 323i 1978

M42powered wrote:

Don\'t frett, I can\'t find that porsche thread either. I typed \"porsche\" into the search engine to find all posts containing that word. None of them are the thread in question.

Good....I am not crazy.....or we both are crazy.....either or, it is better than feeling crazy by yourself.

MayanArch

Posted Friday, Mar 4th 9:26pm [Edit] [Quote] [IMS] [View car]

Member
Post nr. 238

Florida, USA
Baur E21 2.7 1982, Baur E30 318i 1985, 323i 1978

Quote:

Thanks

Never been called a Guru before

I vote you most likely to talk over our heads.....and that is part of being a guru.

You bring the real tech talk to the board......

I just wish I could understand half of it.

MayanArch

Posted Thursday, Jan 3rd 12:42am [Edit] [Quote] [IMS] [View car]

Member
Post nr. 1484

Florida, USA
Baur E21 2.7 1982, Baur E30 318i 1985, 323i 1978

Can someone confirm the Porsche fuel distributor that is a straight swap for a 323i distributor?

I am being told it is the 0438 100 031 Porsche part that can substitute the 0438 100 028 BMW distributor.

jrcook320

Posted Tuesday, Jan 8th 8:37am [Edit] [Quote] [IMS] [View car]

Junior Member
Post nr. 1

Van Wert, OH
'81 320i

The porsche fuel distributor should bolt on to your stock 323i AFM with no problems. I won't likely make much difference which one you use.

The only reason I see to swap to the 84mm AFM is if you are making enough power to max out the travel of the 80mm afm. Seeing as how I'm making over 220 hp using an 80mm afm from a porsche 924 turbo, that would take a pretty serious m20.

If you guys want info on this get ahold of Jeff Beyer (JDB ) on bimmerforums. He worked for Hardy & Beck in teh '80's. He is the CIS master and has tried many CIS setups from various 6 cyl. cars to experiment with different bowl shapes of AFMs to get different fuel curves. His 3.0 m20 is making 240 hp and still running CIS.

jrcook320

Posted Tuesday, Jan 8th 8:49am [Edit] [Quote] [IMS] [View car]

Junior Member
Post nr. 1

Van Wert, OH
'81 320i

MayanArch wrote:

It won't be any harder than installing a stock FD. You won't be caught between Porsche and BMW mechanics. You'll be caught between Bosch and Bosch mechanics. I'm running a Volvo 240 turbo fuel distributor on a Porsche 924 turbo air flow meter. Its all bosch.

All you MIGHT have to do is reset your base mixture to get the car running with a different FD. To do this, back the mixture screw out, jumper the fuel pump and slowly turn the mixture screw clockwise till you hear the injectors start to spray. The back the mixture screw out 1/8 turn. This will get the car running but will require further tuning.

Just make sure the system pressure is correct (ie 323i specs) and control pressure are good and it should run about the same. If the FD in question actually does have a higher max flow rate (it likely does), this would not be a performance adder on its own, just a way to support the fuel flow requirements induced by lots of other performance adders.

Madhatter

Posted Wednesday, Jan 9th 2:20pm [Edit] [Quote] [IMS] [View car]

Member
Post nr. 256

Australia - QLD
E21, E24, E30

ill have to look really hard through the papers ive got here, but somewhere in my travels ive got old photos of an m20 powered car using a V8 fuel distributor. The ports are blanked off with screws, its interesting in that ive seen some mercedes distributors for the 6 cylinders (and volvo 5 cylinder ones) come with more cylinders but the ports arent drilled out (so they are blank.

jrcook320

Posted Monday, Jan 14th 5:00am [Edit] [Quote] [IMS] [View car]

Junior Member
Post nr. 1

Van Wert, OH
'81 320i

That's likely the distributor off the old MB 450 SEL 6.9. It had a 6.9L SOHC v8 making 286 hp 405 ft-lbs tq, running CIS.

Here's a fuel distributor off of one installed a 4 cyl turbo audi:

The volvo 240 turbo used a 6 cylinder block but only machined 4 ports. Here's mine, though my air flow meter is an 80mm downdraft off a porsche 931.