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Yes, that was my point, the more airflow the higher the temp will be. The expansion valve "should" keep it from freezing up but I had my first E12 freeze up one time when it was just a tiny bit low on charge. Noticed the lack of airflow and when I stopped to get gas a huge puddle formed u...

Serious question: has anyone ever measured airflow in cfm at the outside vents? Less than a heavy breather. I don't have a cfm reading, but Road Test magazine measured the air out of the 1975 530i's vents as approx 40F. The stock system will make cold air on R12, if you have no leaks and everything...

I don't have a cfm reading, but Road Test magazine measured the air out of the 1975 530i's vents as approx 40F. The stock system will make cold air on R12, if you have no leaks and everything is as it should be. The e12's problem was more air distribution, and as mentioned above by Robert Bondi, the...

I have been using the SD508 Sanden unit since 2001, and it seems fine.

Finally got the old 530i fired up. :D It seems like it was a combination of fuel and ignition problems. The fuel pump had failed internally and I had the timing way off when I swapped out the distributor. I installed a new fuel pump and I bought one of those whistle gizmos that you insert into the ...

Hi all, Glad to be in the community. I am working on my project as follows, Chassis: 1980 E12 520/6 3hp22 (factory setup) Project -engine: modified M20B27 -gearbox: G265/5 CR, aka Dogleg (come alone with gearbox itself only, don’t know what original donor car is). -bellhouse: is compatible with M20...

Yes the carbs would bolt up fine, but there may or may not be provisions on the later head for a mechanical fuel pump. Installing an electric fuel pump would be easy enough, but as cranky as those carbs were I'd just convert the car to FI. The major stumbling block I see is the driveshaft, a Bav ha...

RealOEM lists two different Giubos for my '81 E12: 26111107832 D=96MM/12 ' 26117511454 LK=96MM/12 only in conjunction with -- Hex bolt M12X1,5X56 27101220647 -- Spacer sleeve 26111225048 The 832 variant is about $207 The 454 is about $124, plus the spacer sleeves (about $45). Which is my better opt...

What is capacity for brake/clutch fluid in E12 for complete flush of system. Have had no luck locating this info. Would like to hear what brands of brake fluid others are using. I know dot 4; but any perils of inside info. Thanks All it says in the owners handbook and Haynes manual is to go up to t...

Doh! My eyesite must be going. :D So that would be 43 psi. I believe generic fuel pumps for carburetor engines would be 3.5 or 5 psi so not sure if that is enough pressure to run a fuel injected motor? Unfortunately the low fuel pressure for a carb engine isn't enough for any injected motor. The ca...

canada karl wrote: ↑Thu Dec 08, 2022 9:25 am The link for that ebay pump did not show up? What psi does that pump put? I believe 30 metric bar is pretty high pressure. Looked it up and see that 30 metric bar is 435psi????. Can that be correct?

I said 3.0 (three point zero) not 30 (thirty)

canada karl wrote: ↑Sat Nov 26, 2022 2:03 pm I want to start a parts 530i that has a missing fuel pump. I'd like to swap in a cheaper generic pump.What kind of pump pressure would I need?

The Haynes manual says 3.0 metric bar.

A Euro 728 would have a higher compression 2.8 engine, probably 9:1 instead of the 8.3:1 of a US spec 530i. About the same power but a touch less torque. The euro car might have a hotter cam and would have a different curve on the distributor, and of course would not have come with all the smog equ...

Jcat wrote: ↑Tue Sep 20, 2022 8:57 pm However... I put a Euro switch in my US car. Works like a champ despite the physical differences re the extra pin. Just had to swap out the buttons.

Euro to US might work, but not US to Euro.

Thanks for the heads up Robert