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B20F(xx034) vs. B20E(xx017) ECU-Computer 1800 1972

posted by  1800B on  Mon Dec 13 16:14 CST 2021
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Noticed quite some experience with the D-Jetronic systems when browsing across the different posts.

Did someone already had a chance to compare the B20F(xx034) vs B20E(xx017) computers?

Is one running richer versus the other? Is there a noticeable change in fuel mixture and behavior?
Same for the MAP sensors of the B20F(xx035) vs B20E(xx015).

Looking to create a D-Jetronic setup for a 2130cc B20E, 9.9:1, Street performance cam, Flowed head, K&N Airfilter in stock air filter box, Standard exhaust manifold, Standard advance of 10 degrees, 123 ignition with B20E curve, NOS Bosch fuel injectors, Fuel pressure at 35 Psi/2.4 Bar. Water temp in steady state close to standard.

Recently an Innovate AFR meter was installed as the car was running to lean and want now to take the time and effort to get it exactly right.


There are multiple combinations of ECU/Computer and MAP sensors.

Already have a collection of ECU/Computers; 2xB20E and 3xB20F. Guess what... they do generate different AFR readings with same MAP sensor.

Altogether I am converging towards the standard B20E setup as it had some more Hp (according to specs).

Your insights are highly appreciated however!





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