20b Shopping...
03-27-2005, 08:48 PM
#1
Senior Member
Thread Starter
Join Date: May 2002
Location: California
Posts: 22,465
so i'm about to be given a set of 20b side housings and an eshaft. 3 new rotor housings and seals at mazdacomp pricing is a cool $3800......
i paid $3800 for my jspec motor, complete with all the stuff on it.
rebuilding these isnt for the faint of wallet!
i paid $3800 for my jspec motor, complete with all the stuff on it.
rebuilding these isnt for the faint of wallet!
03-29-2005, 03:25 AM
#6
Senior Member
Join Date: Nov 2001
Posts: 2,284
Maybe try a MegaSquirt? I spent the last few hours setting up another 20B wiring harness I acquired recently on my 20B (hey, how's my old harness doing?). I've already seperated the important wires from the rest of the mess. I'm A) looking for a good place to mount the ECU up under the dash or whatever, B) debating on length of wiring harness from ECU to original Cosmo wires, and C) wondering how and where to route them. Oh yeah, and D) I still need to add a post-pump filter and route the new fuel line into the engine bay and up to the rails. The filter I picked up today is really cool with 3/8" barbed ends and a welded steel body; perfect for adding behind a Walbro 255 according to a fellow MegaSquirter who recommended it to me whose engine puts out like 450HP or so with the same filter and pump. It was only $9.02 after sales tax. 
The cost of a MegaSquirt certainly can't be beat. I'll be the first to try one on a 20B. I've loaded some working NA rotary fuel and spark tables (maps) into it (actually the spark table is something I came up with on my own, but it's based on a working one and it's what I'll use the first time I try to fire up the engine). It's set up to run leading ignition only, but I think we all know trailing doesn't do anything for power, so I'm ok with it. Plus, each leading plug will receive the FC-like second spark 180° after the first spark at the normal time. No other ECU can do this to my knowledge and the stock Cosmo ECU certainly can't. I really like what it did for my 13Bs, so I can't wait to hear how my 20B will run with it (my dizzy was modded to produce the same type of sparks, and the engine reved very nicely buit didn't want to idle thanks to the makeshift carb I used when I briefly test ran it last year). Or if I prefered a more traditional ignition like everyone else with an E6K or whatever, I could spark leading and trailing together only once per rotor face with no split. Either/or. I have a feeling, however, that I will end up prefering the dual leading sparks instead.
The cost of a MegaSquirt certainly can't be beat. I'll be the first to try one on a 20B. I've loaded some working NA rotary fuel and spark tables (maps) into it (actually the spark table is something I came up with on my own, but it's based on a working one and it's what I'll use the first time I try to fire up the engine). It's set up to run leading ignition only, but I think we all know trailing doesn't do anything for power, so I'm ok with it. Plus, each leading plug will receive the FC-like second spark 180° after the first spark at the normal time. No other ECU can do this to my knowledge and the stock Cosmo ECU certainly can't. I really like what it did for my 13Bs, so I can't wait to hear how my 20B will run with it (my dizzy was modded to produce the same type of sparks, and the engine reved very nicely buit didn't want to idle thanks to the makeshift carb I used when I briefly test ran it last year). Or if I prefered a more traditional ignition like everyone else with an E6K or whatever, I could spark leading and trailing together only once per rotor face with no split. Either/or. I have a feeling, however, that I will end up prefering the dual leading sparks instead.
03-29-2005, 03:47 PM
#7
Senior Member
Join Date: Nov 2001
Posts: 2,284
I think I'll start off with the ECU in the glove box with enough slack in the wiring harness to install it somewhere else later. Reason being there is so little room in this car and I'd like to get this done soon. I'll worry about the details later.
03-29-2005, 08:02 PM
#8
Senior Member
Thread Starter
Join Date: May 2002
Location: California
Posts: 22,465
[quote name='Jeff20B' date='Mar 29 2005, 01:47 PM']I think I'll start off with the ECU in the glove box with enough slack in the wiring harness to install it somewhere else later. Reason being there is so little room in this car and I'd like to get this done soon. I'll worry about the details later.
[/quote]
yah, glove box is a good spot for it anyways.
i'm not sure what ecu i'm gonna use, i'm leaning toward the wolf, cause 13b ace is gonna use one on his pickup, so i can see it working.
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yah, glove box is a good spot for it anyways.
i'm not sure what ecu i'm gonna use, i'm leaning toward the wolf, cause 13b ace is gonna use one on his pickup, so i can see it working.
