LC4CARL
Aero challenged
- Joined
- Sep 8, 2008
- Location
- Vancouver, WA
Get well soon.
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As fun as a 4.10 rear end would be, the 3.73 without lockup is good enough for now. Thanks though .
...and if it's dead, I have no idea what I'll do. Engines are cheap here.
I hope the Canadian B21A is as tough to kill as the others. It's from 84, so I really don't know if it's got the bigger rods or not. The datalogs show everything is fine, no dropouts of communication, just a complete loss of power. Everything reads correctly, the car just...popopopopops and dies unless I release the throttle to return to idle.Well from what I know about the B21, they are quite difficult to kill!
With exactly 1 MS2 car under my belt, I know that wiring connections and grounds are everything! So is the heartbeat...... the RPM signal. If any of that is intermittent, you have trouble.
I've tossed all my electrical shenanigans and have been running the MS1 in fuel and spark, using volvo components. My biggest problem is that I like to do things that challenge my brain, which sometimes leads me down the longest path from A to B, lol.Are you using a Tuner Studio? Is your setup still fuel only? From reading your thread, I recall you had cobbled together an unusual assembly of ignition components. My gut tells me you should investigate/ remediate that first. Wire routing with MS is critical, never run your power cables Anywhere near the "control input", that is all the 0 - 5 VDC inputs to MS.
Lots and lots of times, it's my main vice . This MS1 box is a pre-built model, from Diyautotune, because I know that sometimes I miss things, lol .Have you read and understand all the Bowling & Grippo documents on how to build and tune your system? I found their documents to be excellent, in addition to the fine work within MS Extra. Those guys were couple of OE automotive EE's, smart guys!
No toes damaged here. When I troubleshoot, I go right back to the beginning in order to see if I've overlooked anything. Even the most experienced person can make a silly mistake, or assume they know too much. Brainstorming is the best way to solve a problem, thanks for the help and ideas .Apologies if I stepped on anything, I read your thread a week ago and I'm operating on a half cup of Joe this morning! I love your 4 door, keep at it and you'll have a door slammer!
Since it was a carbed car, there was no in-tank or under-car pumps, just a mechanical one on the engine. I swapped in an EFI level sender and put an Airtex 255lph pump in it.The DIYAutotune boxes are reliable, so I doubt that is your issue. I'd always suspect the custom wiring harness first.... but what you describe almost sounds like you've got no fuel. What is the age of your fuel pumps.... one thing MS data logs won't show, unless the AFRs went super lean as she dies.
This was the first time I've been to the track in three years, so I'm definitely just holding on to old habits by using a big turbo with a .63 exhaust AR. I have no reason to go that big, so I definitely think the 16T is going back on, or it's going to get modded into a 19T over the winter. Coupled with the electronic boost controller I have now, the response should be INSANE.IMO these cars should be focused to "time to torque"..... a turbo that will spool quick is what you want for a street driven car. NOW if you are trying to build a strip machine out of your 84 then the turbo required is quite different. With something as small as a B21, I think I'd be searching for a 0.48 A/R turbine to get that sucker spooled up quick. I'm in process of a 19t for my DD, and the reason is that they are rumored to spool quite fast...... and keep the boost under 16 PSI so the gas temps exiting the engine stay under 900*C maximum.
I used the BW55 flexplate for the swap, which is what my car was originally, so there were no teeth for the CPS. I'd have had to drill the block as well, so I didn't bother. I may look into picking up a B230FT/AW71 from a buddy this weekend, which would give me a spare engine, and a proper flywheel to use for waste spark. It all depends on how motivated I am, because it would be a heck of a job to pull it out (the car is buried in a field). MS1 'could' do waste spark, but I have an MS2 to wire in over the winter, which would remove my current custom harness as well. The MS2 could definitely handle the stock CPS/trigger wheel combo .Since you put in the AW71, did you use the factory CPS? I know folks like to use the earlier distributors with MS, but Kenny (Linuxman) recommended to me years ago to "go to wasted spark" as soon as possible. I'm sure MS2 can handle that, not sure if MS1 is able? The best ignition timing is crank based, not aux. shaft / cam shaft based IMO. I am using the BOSCH Motorsports coil and Buckhaspark WS, and really like it. I'd try to find a way to migrate to that as soon as possible, and get away from a single coil for all 4 cylinders. Alternately, and EDIS system is supposed to be rock solid... also crank based.
Good luck! I'll keep an eye up North to see how you are doing