Maybe the original Mazda distributor (for a carburetor) has a magnetic pickup to trigger a GM Ignition Module?
See attached pic.
dave w
Maybe the original Mazda distributor (for a carburetor) has a magnetic pickup to trigger a GM Ignition Module?
See attached pic.
dave w
is this similar to what eagle mark was working on?
Not sure who that is. Here's the link:
http://www.mazdatrucking.com/forum/s...EFI-Conversion
Looking into the resistance values of the Mazda vs. GM CTS. They look close on the upper end, but get a little further apart down low. Anybody have any thoughts/comments on the compatibility of these values?
Mazda CTS.jpg
GM CTS.JPG
The mazdatrucking.com link is a Fuel Only control. The TBI computer does not control spark advance.
Using the GM Ignition Module allows the GM computer to control spark advance.
Good - carburetor
Better - TBI Fuel Only
Best - 100% TBI functionality ( computer controlled fuel and spark advance)
dave w
This looks promising. Apparently the earlier b2000s (2.0l) have a magnetic pickup in the distributor.Originally Posted by dave w
https://www.streetsource.com/threads...msd-box-89-b22
Dave...I'm a little foggy in this area. Does this mean I could modify the early Mazda dist, bypass the vac advance and run full TBI ECM timing control? If so, how? Because that would be awesome.
I'm not familiar with Mazda's.
The functional description is as follows: the magnetic pickup will make an Alternating Current (AC) signal when the distributor shaft starts spinning. The AC signal is very low voltage, but the AC frequency will change as the distributor shafts spins faster and faster. The GM Ignition Module converts the AC signal from the pickup coil into a square wave that the TBI computer reads as a distributor reference pulse (aka Engine RPM).
The GM Ignition Module is very universal, it will accept magnetic pickup AC signals from all automotive pickup coils manufactured / imported to the United States after 1975, including the pickup coils manufactured by Mazda after 1975.
For an EFI conversion, a distributor with a vacuum advance will need the vacuum advance mechanism welded.
dave w
@Dave w
"For an EFI conversion, a distributor with a vacuum advance will need the vacuum advance mechanism welded."
I guess you mean the flywheel (centrifugual) advance mechanism.
BOTH mechanisms will need to be deleted and disabled. Easiest just to weld them in the static fully retarded locations.
do a Google search for Toyota gm efi conversion. he used the pickup out of a stock Toyota distributor and remotely mounted a GM ignition module on an aluminum heatsink. if distributor has mechanical advance you will have to remove and weld @ 0*.
This link, correct?
https://www.pirate4x4.com/forum/toyo...5-22r-tbi.html
"Also, the GM ignition module needed a heat sink, hence the small aluminum plate behind it. The 22RE distributor connects to the ignition module in a specfic way: distributor red wire -> P terminal on module. distributor white wire -> N terminal on module. If you get them backwards, you won't get a proper signal to the ECM and it will run like poop."
ToyGM Dist.JPG
Last edited by JCampbell; 01-10-2020 at 03:04 AM.
yes that's it, hard to believe i remembered that from over 9 years ago. hopefully that gives you some ideas....
The 2.2l EFI distributor is set up for electronic ignition with "Hall effect". That is the reluctor ring/magnetic pickup, correct?
I should be able to use the EFI dist and not have to fool with the vac advance in the carb dist, correct?
AIP Electronics Complete Premium Electronic Ignition Distributor Compatible Replacement For 1990-1993 Mazda B2200 2.2L With Hall Effect T2T53071A MZ50 Oem Fit DT2T530 https://www.amazon.com/dp/B01DPXFLK2..._JCagEbZZY564X
Does anybody know offhand what the CFM rating is on the 2.5 TB?
I'm going to guess about 270 CFM, based on the fact that a two barrel 5.7 throttle body is 535 CFM.
dave w
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